This agreement is filed as a translation from the original Spanish language version and is supplied solely for informational purposes. The original version in the Spanish language is the definitive agreement and is the version that has legal force and effect. TABLE OF CONTENTS

Contractor Name:

MERCO INGENIERIA INDUSTRIAL, S.A. DE C.V. AND FORBES ENERGY SERVICES (JOINT PROPOSAL)

Management Centre:

2383814020821800

Tax Registry Number (RFC):

MII030908KH4

TAXPAYER IDENTIFICATION NUMBER: 98-0581100

Financial Entry:

314302515

Contract No.:

424048860

Contract Request:

5000008966

Contract Amount:

$234,256,757.01 MXP (two hundred and thirty-four million, two hundred and fifty-six thousand, seven hundred and fifty-seven pesos and 01/100 cents), plus US$48,842,604.99 (forty-eight million, eight hundred and forty-two thousand, six hundred and four US dollars and 99/100 cents)

International Public Tender with TLC

18575051-027/08

Tender: 027/08-TOUSPC-P

PURPOSE OF THE CONTRACT. PEP requires and the CONTRACTOR undertakes to perform, in accordance with this contract and its attachments, the complete work for the “WELL MAINTENANCE AND REPAIR WORK, AT THE POZA RICA – ALTAMIRA ASSET OF THE NORTH REGION” (PACKAGE I).

It is expressly understood and agreed that the CONTRACTOR will not have any share in the hydrocarbons extracted or produced at any of the development or exploratory wells hereunder, and that PEP will not give the CONTRACTOR a share in any compensation from the resulting production of the wells. The only right that the CONTRACTOR has is to receive the compensation provided for in this contract, as a result of the execution of the work hereunder, which is not dependent or contingent upon any factor that is not the very compliance with its obligations under this contract.

PEP will request that the CONTRACTOR execute the work through written work orders.

In compliance with the provisions of the second paragraph of article 36 of the Law of Public Works and Related Services and article 50 of its Regulations, and under the terms of Clause Two of the Private Agreement dated July 17, 2008, presented in the Joint Proposal of the companies: MERCO INGENIERIA INDUSTRIAL S.A. DE C.V. and FORBES ENERGY SERVICES LTD, the participation in the work hereunder for each member of the group will be according to the following:

MERCO INGENIERIA INDUSTRIAL S.A. DE C.V. is under obligation to execute: the administration, control and management of the contract in addition to:

1.      Infrastructure works (complete item 9.0 and sub-items).

2.      Platforms (complete item 10.0 and sub-items).

3.      Construction of anchors (complete item 11.0 and sub-items).

4.      Supplementary works (complete item 12.0 and sub-items).

FORBES ENERGY SERVICES LTD is under obligation to execute: the operation and engineering described in:

1.      Interventions with contractor equipment (complete item 2.0 and sub-items).

2.      Interventions with PEP equipment and contractor coordination (complete item 3.0 and sub-items).

3.      Share of daily rental of drilling equipment (complete item 4.0 and sub-items).

4.      Monitoring system (complete item 5.0 and sub-items).

5.      Optional services (sub-items 6.1, 6.2, 6.5, 6.6, 6.7 and 6.8 from item 6.0).

6.      Hydraulic testing upon introducing the production equipment (item 8.0 and sub-items).

TWO

CONTRACT AMOUNT. The total amount of this contract is: $234,256,757.01 MXP (two hundred and thirty-four million, two hundred and fifty-six thousand, seven hundred and fifty-seven pesos and 01/100 cents), plus US$48,842,604.99 (forty-eight million, eight hundred and forty-two thousand, six hundred and four US dollars and 99/100 cents) plus the Value Added Tax.

METHOD OF PAYMENT. The CONTRACTOR will receive from PEP the amount resulting from applying the unit prices to the amounts of work performed, as total payment for each item unit of work completed, executed according to the contract, construction specifications and quality standards.

The amount to pay for the work hereunder will be calculated by preparing estimates that will cover monthly periods and will be submitted by the CONTRACTOR to the site supervision office. They will be accompanied by the documentation that certifies the admissibility of their payment, within 6 (six) calendar days following the cut-off date, which will be the last day of each month. If the estimates are not submitted in the aforementioned term, the corresponding estimate will be submitted on the following cut-off date, without giving rise to a claim for expenses and/or financing costs from the CONTRACTOR. The site supervision office will have a period no longer than 15 (fifteen) calendar days to review and authorize the estimates, following the date that the corresponding estimates are submitted to it.

When analyzing and calculating the payment amounts, the applicable fees and taxes shall be considered, under the terms of the tax laws. The CONTRACTOR will be solely responsible for the invoices meeting the administrative and tax requirements for their payment. Therefore, the delay in their payment due to the lack of any of these, or due to their incorrect or late submission, will not be grounds to request the payment of financing expenses as referred to in article 55 of the Law of Public Works and Related Services.

The parties who sign this contract in their capacity as CONTRACTORS, agree that the company MERCO INGENIERIA S.A. DE C.V., in its capacity as Common Representative, will be the one to submit the invoices for each and every one of the payments arising from this contract. This is with the understanding that PEP will not be liable for the manner in which the Common Representative distributes or divides the earnings or losses with respect to the amounts that it receives as a result of this contract.

The submission date of the estimates to the site supervision office shall be recorded in the log.

Estimates for work performed shall be paid by PEP, under its responsibility, within a period no longer than 20 (twenty) calendar days, from the date on which they have been authorized by the site supervision office. This date will be recorded in the log of the work and in the estimates themselves.

Payments to the CONTRACTOR will be done invariably by an automatic bank deposit into account of the credit institution authorized to operate in the United Mexican States, selected by the CONTRACTOR, who shall notify PEP in writing directly at the Payment Window for the North Region, located at Boulevard campo PEMEX s/n (to one side of the vehicle entrance #2) interior campo PEMEX Col. Herradura C.P. 93370, Poza Rica de Hgo. Ver, prior to the first of the payments that take place under this contract.

The estimates and the settlement, even though they have been paid, will not be considered full acceptance of the work, since PEP expressly reserves the right to file claims for missing or poorly performed work, and where appropriate, for the excess payment that has been made.

The payment of the cost adjustments and financing cost will be done in the estimates following the month on which the granted adjustment has been authorized, by applying to the amount of the aforementioned estimates the detailed increase corresponding to said factors for each type of adjustment. The latest adjustments that have been authorized shall be applied. All adjustment factors granted shall accumulate.

Payment of the authorized estimates of non-recoverable expenses that are duly proven will be done in accordance with the terms and conditions of the second paragraph of article 54 of the Law of Public Works and Related Services. No additional cost will be applicable to the resulting amounts, whether for indirect costs, financing or profits.

Once the CONTRACTOR has received the payment, it will have 15 (fifteen) calendar days to dispute any aspect thereof. Once this period has passed without any claim being filed, the payment will be considered definitively accepted and the CONTRACTOR will release PEP from any obligation related to said payment.

Payments will be made in local currency at the exchange rate published by the Bank of Mexico in the Official Journal of the Federation on the date on which said payments are made.

FOUR

FINANCING SOURCES. The CONTRACTOR acknowledges that Petróleos Mexicanos, its Subsidiary Agencies or any financial institution and/or affiliate that it may designate for this purpose, may use the resources from financing, in order to finance the payments arising from this contract. The CONTRACTOR knows and undertakes to inform its CONTRACTOR and/or subcontractors on a timely basis regarding the requirements related to the documentation required by the financing sources, in order to ensure compliance with the provisions of this clause.

The “Country of Origin Certificate for Goods and/or Services”, submitted prior to the signing of this contract, is integrated into this contract as attachment “G-1”, with the understanding that PEP may request any clarification or additional information from the CONTRACTOR regarding the certificate referred to in this clause during the validity of the contract. Likewise, in the event that the information considered in said certificate were to be amended during the validity of this contract, the CONTRACTOR undertakes to notify PEP immediately after the CONTRACTOR is aware of the amendment, which will not mean that an amendment is made to this contract.

The CONTRACTOR undertakes to submit the documentation required by the financing sources, which shall be submitted in accordance with the requirements established in attachment “G” named “Documentation Required by Financing Sources”. To this end, it will follow the instructions and specific formats in force that are contained within the “Instructions from Petróleos Mexicanos and its Subsidiary Agencies for the Submission of Documentation Required by the Financing Sources”, which was delivered to it prior to the signing of this contract. The current instructions referred to in this clause, are also available on the following webpage of PEMEX: www.pemex.com/proveedores/documentación.

The CONTRACTOR shall appear at the responsible department (“Financing Module”) of PEP, before each payment event in order to provide the documentation required by the financing sources, which may apply. The responsible department (“Financing Module”) will issue the “Documentation Tracking Receipt” and/or will affix the corresponding seal, which will become part of the support documentation that the CONTRACTOR must attach to each payment request that it submits under this contract.

PEP will not be under obligation to issue or submit the “Documentation Tracking Receipt” and/or corresponding seal when the CONTRACTOR does not submit the documentation required by the applicable financing sources, without just cause.

PEP may request any modification, clarification or additional information from the CONTRACTOR related to the documentation required by the financing sources.

In the same manner, the CONTRACTOR accepts that for certain cases, the documentation required by the financing sources shall be submitted to the entity (agent bank, export credit agency, Corporate Finance Office, etc.) that PEP may indicate on a timely basis.

ASSIGNMENT OF COLLECTION RIGHTS. The CONTRACTOR may not assign the rights and obligations arising from this contract either partially or fully in favour of any other individual or legal entity, except for the collection rights on the estimates for the work performed. In this case, the CONTRACTOR shall request consent from PEP in writing, who will come to an appropriate decision within a term of 15 (fifteen) calendar days from the request submission. In the event that the aforementioned period has passed without PEP having given a response in writing to the request from the CONTRACTOR, this request will be considered not accepted.

If as a result of the assignment of the collection rights requested by the CONTRACTOR, a delay in payment were to occur, the payment of financing expenses as referred to in article 55 of the Law of Public Works and Related Services will not apply. Neither will the process of assigning collection rights grant the CONTRACTOR the right to request an extension to the completion date.

SIX

WITHHOLDINGS. The CONTRACTOR accepts that the following withholdings will be performed on each of the estimates that are paid:

a).-   FIVE THOUSANDTHS of the amount of the work performed, which will be set aside for the Ministry of the Civil Service for the fees from the inspection service, supervision and control of the work, which PEP will deliver to the Treasury of the Federation, in accordance with article 191 of the Federal Law of Fees.

SEVEN

FINANCING EXPENSES. In the case of non-compliance in the payment of the estimates and cost adjustment, PEP at the request of the CONTRACTOR, shall pay financing expenses at a rate that will be equal to that set by the Revenue Law of the Federation in cases of late payment of tax credits. Said expenses will begin to be generated when the parties have defined the amount to be paid and will be calculated on the unpaid amounts. They must be calculated by calendar days from the time they are calculated and until the date they are actually made available to the CONTRACTOR, in accordance with article 55 of the Law of Public Works and Related Services.

EIGHT

EXCESS PAYMENTS. In the case of excess payments that the CONTRACTOR has received, it shall return the excess amounts paid plus the corresponding interest, as indicated in clause six “WITHHOLDINGS” of this contract. The interest will be calculated on the excess amounts paid in each case and will be calculated by calendar days, from the payment date to the date on which the amounts are actually made available to PEP.

It will not be considered an excess payment when the differences borne by the CONTRACTOR are offset in the following estimate, or in the settlement, if said payment had not been identified previously.

NINE

COST ADJUSTMENT. The parties agree to the review and adjustment of the costs that make up the unit prices of this contract, agreed upon in local currency, in accordance with article 56 of the Law of Public Works and Related Services and articles 105, 106 and 144 of its Regulations. Therefore, both parties agree to take the itemized costs that are listed in Format DE-1 as the basis for performing the costs adjustments, which the CONTRACTOR attached in its proposal. According to article 105 from the Regulations of the Law of Public Works and Related Services, within 60 (sixty) calendar days following the publication of the indices that are applicable to the period for said indices, the CONTRACTOR shall request the corresponding cost adjustment from PEP. Once the above period has passed, the CONTRACTOR no longer has the right to claim the cost adjustment for the period in question.

Within 60 (sixty) calendar days following receipt of the request, PEP will issue the applicable decision in writing. Authorization of the cost adjustment shall be done through the official decision letter that agrees upon the corresponding increase or decrease.

Adjustment of the costs that make up the agreed unit prices in local currency, which are part of the total direct costs, will be done according to the express terms of articles 56, 57 section III and 58 of the Law of Public Works and Related Services, and articles 145, 146, 147, 152 and 153 of its Regulations.

LOCAL CURRENCY.

I.       The adjustments will be calculated from the date on which the increase or decrease has occurred in the cost of the inputs, with regard to the incomplete work, according to the execution schedule agreed upon in the Contract, or if there is a delay not attributable to the CONTRACTOR, regarding the schedule that had been agreed upon.

When the delay is due to causes attributable to the CONTRACTOR, the cost adjustment will proceed exclusively for the incomplete work according to the schedule that had been agreed upon.

The base indices that will serve for calculating the cost adjustments in the Contract will be those that correspond to the date of the ceremony for submission and opening of proposals.

The original prices of the inputs shall be the prevailing prices at the time the proposals are submitted and opened, and may not be modified or replaced by any variation that may occur between the date they are submitted and the last day of the adjustment month.

II.     The cost increases or decreases of the inputs will be calculated based upon the Producer Price Indices for Services that the Bank of Mexico publishes.

When the indices that the CONTRACTOR and PEP require are not found among those published by the Bank of Mexico, PEP will proceed to calculate them according to the prices that it investigates, using the guidelines and methodology issued by the Bank of Mexico.

In the specific case of labour, the variation corresponding to the minimum wage of the corresponding Region will be used as the index, which is published by the National Minimum Wage Commission in the Official Journal of the Federation.

III.    The original prices of the Contract will remain fixed until the completion of the contracted work. The adjustment will be applied exclusively to the direct costs, holding the indirect costs and original earnings constant during the performance of the Contract. The financing cost will be subject to variations in the interest rate that the CONTRACTOR has considered in it its proposal; and

IV.   All other guidelines that the Ministry of the Civil Service may issue in this regard.

Review of the cost adjustments will be monthly, where the parties agree that the authorized factors will remain fixed during this period. For calculation of the factor that will prevail during the monthly period, the indices corresponding to the calendar month are considered, for the month in which the validity of the factor begins.

Calculation of the cost adjustments will be subject to the provisions of Section II of CHAPTER FIVE from the Regulations of the Law of Public Works and Related Services.

When the cost adjustment moves upwards, the CONTRACTOR will be the one to initiate it. If it is downwards, PEP will be the one to do this.

Within sixty (60) calendar days following the receipt of the request, PEP will issue the applicable decision in writing. The authorization of the cost adjustment shall be made through the official decision document that agrees to the corresponding increase or decrease.

The payment of the cost adjustments will be made on the estimates following the month in which the granted adjustment has been authorized.

The procedure used for updating prices consists of calculating the sum of the terms formed by each of the proportions or incidents (expressed in decimals) in which the respective inputs take part, multiplied by the quotient formed by the relative current and prior inputs corresponding to the dates that determine the update period. The cost adjustment procedure in local currency may not be modified during the contract term.

The above procedure can be expressed in the following equation:

The payment of the cost adjustments and financing cost will be done in the estimates following the month on which the granted adjustment has been authorized, by applying to the amount of the aforementioned estimates the detailed increase corresponding to said factors for each type of adjustment. The latest adjustments that have been authorized shall be applied.

DOLLARS:

The adjustment of the costs that make up the agreed unit prices in dollars, which take part in the total direct cost, will be done according to the express terms of article 33 section VI of the Law of Public Works and Related Services and article 153A of its Regulations.

Review of the costs for the portion offered in Dollars shall be done through the following procedure:

I.       The adjustments will be calculated from the date on which the increase or decrease to the established index has taken place, with respect to the incomplete work, according to the execution schedule that had been agreed upon in the Contract, or in the event that there is a delay not attributable to the CONTRACTOR, with respect to the schedule that had been agreed upon.

When the delay is due to causes attributable to the CONTRACTOR, the cost adjustment will proceed exclusively for the incomplete work, according to the schedule that had been agreed upon.

The date that will serve as a basis for calculating the cost adjustments for the dollar portion, will be the date corresponding to the proposal submission and opening ceremony.

The original prices in dollars shall be the prevailing prices at the time of the proposal submission and opening, and may not be modified or replaced by any variation that occurs between their submission date and the last day of the adjustment period.

Review of the cost adjustments will be monthly

II.     The increase or decrease in costs of inputs will be calculated for inputs other than foreign labour upon the basis of the Producer Price Index PCUOMFG-OMFG, while foreign labour will be based upon the Average Weekly Earnings of Production Workers CES0500000030, both published by the Bureau of Labor Statistics of the US Department of Labor. For national inputs other than labour, they will be based upon the Producer Price Index with Services excluding petroleum SP6, and for labour, the minimum wage published by the National Minimum Wage Commission in the Official Journal of the Federation of the corresponding region, as well as the average monthly exchange rates for meeting obligations in foreign currency published by the Bank of Mexico.

III.    The original prices of the Contract will remain fixed until the completion of the contracted work. The adjustment will apply exclusively to the direct costs offered in dollars, with the excess cost factor remaining constant, and

IV.   To all other guidelines that the Ministry of the Civil Service issues for this purpose.

Within sixty (60) calendar days following the receipt of the request, PEP will issue the applicable decision in writing. The authorization of the cost adjustment shall be made through the official decision document that agrees to the corresponding increase or decrease.

When the cost adjustment moves upwards, the CONTRACTOR will be the one to initiate it. If it is downwards, PEP will be the one to do this.

The payment of the cost adjustments will be made on the estimates following the month on which the granted adjustment has been authorized.

The formalization of the cost adjustment shall be done through the official decision letter that agrees upon the corresponding increase or decrease. Consequently, no agreement will be required.

The cost adjustment procedure in Dollars may not be modified during the validity of the Contract.

The above procedure can be expressed in the following equation:

Where:

XD1 + XD2 + ZMN1 + ZMN2 = 1

Foreign inputs offered in Dollars

XD1 =

Proportion or incident by which the total of the foreign inputs takes part in the direct cost of the work.

IaD1 =

The Producer Price Index PCUOMFG-OFMG that is published by the Bureau of Labor Statistics on the update for the foreign inputs.

IoD1 =

The Producer Price Index PCUOMFG-OFMG that is published by the Bureau of Labor Statistics on the proposal submission and opening date for foreign inputs.

XD2 =

Proportion or incident by which the total of the foreign inputs takes part in the direct cost of the work quoted in dollars.

IaD2 =

The Average Weekly Earnings of Production Workers CES0500000030 that is published by the Bureau of Labor Statistics on the update for the foreign labour quoted in dollars.

IoD2 =

The Average Weekly Earnings of Production Workers CES0500000030 that is published by the Bureau of Labor Statistics on the proposal submission and opening date for the foreign labour quoted in dollars.

National inputs offered in Dollars

ZMN1 =

Proportion or incidence by which the total national inputs, other than labour, take part in the direct cost of the work quoted in dollars.

IaMN1 =

Is the National Producer Price Index with services excluding petroleum SP6, which the Bank of Mexico publishes on the update for the national inputs, other than labour, in the direct cost of the work offered in dollars.

IoMN1 =

Is the National Producer Price Index with services excluding petroleum SP6, which the Bank of Mexico publishes on the proposal submission and opening date for the national inputs, other than labour, in the direct cost of the work offered in dollars.

ZMN2 =

Proportion or incidence by which the total national labour, takes part in the direct cost of the work quoted in dollars.

IaMN2 =

Is the minimum wage of the Region that corresponds to the performance of the work, which is published by the National Minimum Wage Commission in the Official Journal on the update for national labour in the direct cost of the work offered in dollars.

IaMN2 =

Is the minimum wage of the Region that corresponds to the performance of the work, which is published by the National Minimum Wage Commission in the Official Journal on the proposal submission and opening date for national labour in the direct cost of the work offered in dollars.

TCaMN =

The average exchange rate for settling obligations in foreign currency from the month of the update, which is obtained from the following webpage: www.banxico.org.mx on the following path: Exchange Rate Market > Exchange Rates > Average exchange rates of the period > Publication date in the Official Journal of the Federation.

TCoMN =

The average exchange rate for settling obligations in foreign currency on the month of the proposal submission and opening.

The maximum overall cumulative adjustment percentage that may be granted for the portion offered in dollars is 3% annualized. In other words, no more than 3% may be granted for each period of twelve (12) months or its monthly equivalent.

The lower of the following will be applied: the result produced by the formula, and the result from multiplying the number of months included between the proposal submission and opening date and the update month by 0.25%, divided by 100.

(0.25% x N) / 100; where N = Number of months counted from the month following that of the proposal submission and opening date, and up to and including the update month.

NOTES:

If during the validity of the contract, the agreed indices in the specific equation were to no longer be published, the parties will use those that the Bank of Mexico and the U.S. Bureau of Labor Statistics establish as equivalent for national and foreign inputs respectively, provided that more advantageous conditions are not granted by this substitution with respect to the originally agreed indices.

In the event that with the use of the equivalent indices it is detected that more advantageous conditions are being granted to the CONTRACTOR, the last authorized factor will be granted, which will prevail for the rest of the contract.

None of the cost adjustment procedures may be modified during the term of the Contract.

NINE

CONTRACTUAL PENALTIES.

The parties to this contract agree that in the event there are delays in the performance of the work due to causes attributable to the CONTRACTOR, PEP will apply the following contractual penalties:

The penalties will be applied on the estimates that the CONTRACTOR generates. If it is not possible to apply the established penalties in any of the above cases, the CONTRACTOR is under obligation to deliver to PEP the amount corresponding to said penalties through a certified cheque, otherwise the performance bond will be exercised.

If PEP decides to demand compliance with this contract in accordance with article 1846 of the Federal Civil Code, applicable by extension, the CONTRACTOR shall submit the express consent from the surety institution regarding the guarantees of this contract, where it indicates the period granted to comply with the obligation.

The contractual penalties established in this clause may in no case be greater than the amount of the performance bond in their entirety.

The application of said penalties will not take place when the delay or interruption comes from an act of God or force majeure event or any other cause not attributable to the CONTRACTOR.

The penalties for delay in the performance of the work agreed to in this clause, or any other contractual penalty that must be applied in relation to this contract, will be applied against the estimates that the CONTRACTOR submits to PEP and that PEP pays to the company MERCO INGENIERIA INDUSTRIAL S.A. DE C.V., by virtue of its appointment as Common Representative, regardless of which of the parties is responsible for the delay in the performance of the work and/or any other breach of contract, according to the parts of the works that each company is under obligation to perform as referred to in clause one of this contract, with the understanding that PEP will not be responsible for the manner in which the Common Representative applies the penalties and/or distributes the payments that it receives as a result of this contract.

EXTENSION TO THE COMPLETION DATE. The completion date indicated in the clause named “PERFORMANCE PERIOD”, may be extended, without the performance period of the contract being modified in this regard, by adjusting the execution schedule, only when the following events occur:

(a) If any duly proven act of God or force majeure event occurs, the completion date of the performance period will be extended by a period of time equal to that of the suspension caused by the same, provided an annotation is made in the log and the CONTRACTOR submits its extension request in writing to PEP along with the corresponding support documentation, which shall be done prior to the notice of completion of the work. If said request is not submitted by the CONTRACTOR and said annotation is not performed, no extension will be granted. PEP shall give its decision regarding the extension request within 30 (thirty) calendar days following the submission of the request. If it does not do so, the request will be considered accepted. In the event the extension is accepted, an agreement in writing shall be formalized, with the updated execution schedule being established;

(b) If the work or any part thereof cannot move forward or are delayed due to any act or omission of PEP or another CONTRACTOR working on the site, without involving the CONTRACTOR or any of its subcontractors, the completion date of the execution schedule will be extended, for the period of time whereby the work or part thereof is thus suspended, provided an annotation is made on the log and the CONTRACTOR submits its extension request in writing to PEP along with the corresponding support documentation, within the performance period. If

said request is not submitted by the CONTRACTOR and said annotation is not performed, no extension will be granted. In the event that it is proven that the event is attributable to PEP, it shall give its decision regarding the extension request within 30 (thirty) calendar days following the submission of the request. If it does not do so, the request will be considered accepted. In the event the extension is accepted, this shall be formalized through the corresponding support certificate; and

(c) In the event that PEP orders the suspension of work, it shall proceed in accordance with the clause named “CONTRACT SUSPENSION”.

WORK FOR ADDITIONAL AMOUNTS OR FOR ITEMS NOT ESTABLISHED IN THE ITEM CATALOGUE. If during the contract period, PEP requires the performance of additional amounts of work or work for items not established in the item catalogue, or the CONTRACTOR realizes the need to carry them out, the latter may only perform said work once it has written authorization or through an annotation on the log by the site supervisor, except in cases of an emergency where it is not possible to wait for his authorization.

In the event that the scenarios established in this clause were to occur, the CONTRACTOR, once the work is performed, may prepare its estimates and submit them to the site supervisor on the following estimate. PEP may authorize the payment of the estimates for the work performed.

In the case of additional amounts, these will be paid at the unit prices originally agreed to in this contract. In the case of items not established in the item catalogue, their unit prices shall be reconciled and authorized prior to their payment, pursuant to the provisions of articles 76, 77, 78 and other applicable articles of the Regulations of the Law of Public Works and Related Services.

ACT OF GOD OR FORCE MAJEURE. An act of God or force majeure are understood to be natural phenomena or acts committed by persons that are beyond the control of either of the parties and that take place without there being fault or negligence on the part of the parties. These events are unavoidable, unforeseeable, or cannot be avoided even when they are foreseen, which prevent the affected party from performing its obligations in accordance with this contract. Among others, the following events are considered to be acts of God or force majeure: strikes and labour disturbances (provided they have not given rise or contributed to them), riots, quarantines, epidemics, wars (declared or not), blockades, civil disturbances, insurrections, fires (when they have not given rise or contributed to them) and storms.

In the event of suspension of work arising from an act of God or force majeure, the provisions of the clauses named “EXTENSION TO THE COMPLETION DATE” and “CONTRACT SUSPENSION” will be observed.

In the event of early termination of work arising from an act of God or force majeure, the provisions of the clause named “EARLY TERMINATION OF THE CONTRACT” of this contract will be observed.

CONTRACT PERFORMANCE BOND AND WARRANTY FOR LATENT DEFECTS.

CONTRACT PERFORMANCE BOND.

The CONTRACTOR, in order to guarantee compliance with the obligations arising from this contract, delivered to PEP prior to signing of the contract, a bond policy for 10% (ten percent) of the contract amount, issued by an authorized surety institution, in favour of PEP.

Its consent to the claim that is submitted to the surety due to breach of contract, being duly integrated with the following documentation:

1. Written claim to the surety institution.

2. Copy of the bond policy and its amending documents, where applicable.

3. Copy of the guaranteed contract and its attachments, where applicable.

4. Copy of the notification document to the debtor for its breach of contract.

5. Quantification of the breach of contract.

In the event of any modification to the amount or period agreed to in this contract and/or its attachments, the CONTRACTOR undertakes to deliver to PEP within fifteen (15) calendar days following the formalization of the respective amending agreement, the amending document for the originally granted guarantee, according to the terms established in this contract, where the obligations of this contract and the corresponding agreement are guaranteed. In the event that the CONTRACTOR does not comply with this delivery, PEP may decide to enforce the administrative rescission of the contract. The amending document shall contain the stipulation that it is joint, several and inseparable from the bond initially submitted by the CONTRACTOR.

Provided the contract is being complied with under the agreed terms, the guarantee shall be replaced by another equivalent to 10% (ten percent) of the amount of the work not yet performed, including amounts related to cost adjustments and agreements in said sum, if any, except for what is provided for in the second paragraph of article 61 of the Regulations of the Law of Public Works and Related Services, which will be submitted within 15 (fifteen) calendar days from the date on which the CONTRACTOR is notified in writing of the authorized investment.

WARRANTY ON LATENT DEFECTS.

Once the work is completed, or accepted (where applicable) under the terms of article 138 of the Regulations of the Law of Public Works and Related Services, the CONTRACTOR will be liable for the defects arising therefrom, from latent defects and any other liability that it has incurred, under the terms indicated in this contract and in the applicable legislation.

The work will be guaranteed for a period of 12 (twelve) months for compliance with the obligations referred to in the above paragraph. Therefore, prior to accepting the work, the CONTRACTOR, at its own choosing, shall create a bond for the equivalent of 10% (ten percent) of the total exercised amount of the work; submit a standby letter of credit for the equivalent of 5% (five percent) of the total exercised amount of the work, or provide liquid funds for an amount equivalent to 5% (five percent) of the same amount in trusts especially created for this purpose. This warranty will be released once the twelve months have elapsed, starting from the date of the physical certificate of acceptance of the work, provided that no liability has arisen against the CONTRACTOR during that period.

When the quality warranty is created through a bond policy, it shall be issued by an authorized surety institution, and shall be issued in strict adherence to the Format DI-4 presented in the bidding guidelines of this contract.

When the quality warranty is created through a standby letter of credit, it shall be confirmed or issued by a banking institution authorized to operate in Mexico, and shall be issued in strict adherence to the quality warrantee format issued by the Risks and Insurance Management of this contract.

When the warranty is created through the contribution of liquid funds in a trust, the latter shall be managed by a trust institution authorized to operate in the Mexican Republic. The Trust shall include the following aspects: it shall be irrevocable; shall be made out to PEP as the beneficiary; and the resources under the trust shall be invested in fixed income instruments.

If the warranty on defects, latent defects in the work and any other liability was established through a bond, it will be released in accordance with the provisions of the bond policy that is granted under the terms of article 68 of the Regulations of the Law of Public Works and Related Services.

The CONTRACTOR, where applicable, may withdraw its contributions into the trust and the respective earnings, after twelve months have passed from the date of acceptance of the work. The bond or letter of credit will be automatically cancelled in the same period of time, as the case may be. In the event that an irrevocable letter of credit has been issued, the CONTRACTOR will proceed with its immediate cancellation.

The rights of PEP will be preserved to demand the payment of amounts that are not paid from the compensation that in its opinion are applicable, once the guarantees are exercised according to this clause.

If prior to the execution of the applicable guarantees, the CONTRACTOR states its desire to pay the guaranteed amount directly, said payment shall be received by PEP. In this case, the corresponding guarantees shall be released.

INSURANCE POLICIES. The CONTRACTOR shall have insurance policies for Construction All Risks and/or Assembly during the physical execution of the works (including, where applicable, performance tests), issued by an insurance company legally authorized for this purpose by the United Mexican States. It will deliver to PEP, prior to the start date of the physical execution of the works, a copy and original of the documents that prove payment of the premiums for comparison and to be later returned.

In the case of any accident that occurs during the term of the policy, the Contractor will be solely responsible for filing any claim to its insurers, completely documented. Any and all deductibles applicable to the aforementioned insurance policy will invariably be assumed by the Contractor.

If the aforementioned insurance policies are not delivered to PEP the day prior to the start date of the physical execution of the works at the very latest, PEP will be authorized to not allow the Contractor to execute the works hereunder, and this will not release the Contractor from its full responsibility as far as the Execution Schedule originally agreed to for the performance of the contract purpose.

In the case of any amendment to this contract that affects the insurance policies, the Contractor shall deliver the respective policy or endorsement prior to the formalization of the amendment.

The Contractor will be solely responsible for taking out the insurance limits, terms, conditions and scope of the coverage, as well as the deductibles and exclusions, which it deems appropriate based upon its risk analyses. Therefore, PEP will not be responsible for the sufficiency or insufficiency of the insurance conditions that the insurance policy may have.

OTHER INSURANCE

The Contractor will be solely responsible for having any other insurance policy at its cost, which it deems necessary according to the nature and complexity of the contract scope.

AUTHORIZED REPRESENTATIVES. PEP, prior to commencement of the work, will designate the site supervisor, who will perform the functions established in article 53 of the Law of Public Works and Related Services, and article 84 of its Regulations. Through this site supervisor, it will give the CONTRACTOR instructions in writing that it deems pertinent related to its performance, in the agreed manner and with the modifications that PEP may order.

Supervision is the technical assistance provided by the site supervisor’s office, with the functions that are indicated in this regard under article 86 of the Regulations of the Law of Public Works and Related Services, independently of those that may be agreed to in the supervision contract, where applicable. When supervision is performed by third parties, the site supervisor may install this after commencement of the work.

For its part, the CONTRACTOR is under obligation to have a construction superintendent for the entire time the work is performed, who shall know the project and the terms of reference and have the power to hear and receive all types of notifications related to the work, even those of a personal nature. He will also have sufficient powers to make decisions in all that relates to contract compliance, under the terms established in article 87 of the Regulations of the Law of Public Works and Related Services.

Before commencing work, the CONTRACTOR is under obligation to designate and maintain during the term of the contract, a manager over industrial safety, occupational health and environmental protection, as well as a coordinator. They shall know the project, as well as the industrial safety, occupational health and environmental protection standards and procedures established by PEP, as well as the provisions in those areas contained in Attachment “S” “Safety, occupational health and environmental protection obligations of the Suppliers or Contractors that perform activities at the facilities of PEMEX Exploración y Producción”.

The construction superintendent of the CONTRACTOR, as referred to in this clause, may not act as a manager over industrial safety, occupational health and environmental protection of the CONTRACTOR.

At any time and with sufficient grounds, PEP may request that any of the CONTRACTOR’S representatives be changed, and the latter is under obligation to designate another person who meets the corresponding requirements.

SUBCONTRACTING. In the event that the CONTRACTOR needs to subcontract any part of the work or when it purchases materials or equipment that include their installation on the site, which have not been included in its proposal as work to be subcontracted, it shall request authorization from PEP 05 (FIVE) calendar days in advance to the scheduled commencement of the work it intends to subcontract. It shall indicate: (i) the name of the possible subcontractor in question; (ii) the part of the work to be subcontracted; and (iii) sufficient information so that PEP is able to evaluate the technical capability of the possible subcontractor. Likewise, PEP will be entitled to request from the CONTRACTOR any information in addition to that delivered by the latter, in order to authorize the subcontracting in question. PEP will have a period of 05 (FIVE) calendar days from the date of receipt of the notification, or from the date of receipt of the additional information requested, to accept or reject the execution of said contract in writing. In the event that the aforementioned period has passed without PEP having accepted or rejected the request from the CONTRACTOR in writing, it will be deemed not accepted.

In the event that the CONTRACTOR wishes to replace a subcontractor, it shall request authorization from PEP under the terms indicated in this clause. This will not be grounds for increasing the agreed prices or the execution period.

The parties agree that the CONTRACTOR will be strictly prohibited from subcontracting the work hereunder in its entirety.

Notwithstanding any subcontracting, the CONTRACTOR is and will be solely liable for the quality and the proper and timely execution of the work in accordance with this contract. The subcontractors will not have any action or right to exercise against PEP whatsoever.

LIABILITY OF THE PARTIES. The CONTRACTOR will be solely liable for the performance of the work and will be subject to all laws, regulations and legislation of the governing authorities in the area of construction, safety, use of public roads, ecological and environmental protection that govern federal, state or municipal boundaries. It will also be subject to the safety and health provisions of PEP for carrying out the work established in Attachment “S” “Safety, occupational health and environmental protection obligations of the Suppliers or Contractors that perform activities at the facilities of PEMEX Exploración y Producción” of this contract and to the instructions given by PEP in this regard, for which it undertakes to know the respective standards and regulations that apply according to the work hereunder.

For work that has not been performed according to the stipulations of this contract or to the orders from PEP that are given in writing, PEP will order their immediate demolition, repair or replacement with additional work that may be necessary, which the CONTRACTOR will complete at its own expense, without having any right to additional compensation whatsoever. In this case, PEP, if it deems appropriate, may order the total or partial suspension of contracted work, as long as said additional work is not performed. This will not be grounds for increasing the amount or time period indicated in this contract for its completion.

If the CONTRACTOR performs work for a value higher than what has been contracted, independently of the liability that it incurs for performing excess work, will not be entitled to claim any payment whatsoever, nor any modification of the period for performing the work.

The parties acknowledge that liability for breach of their contractual obligations may not exceed the total amount of the contract, without prejudice to the application of late penalties established in this instrument.

In cases of fire, explosion, surface rupture or loss of control of any well, PEP will coordinate the operations until the well is completely under control, and the CONTRACTOR is under obligation to assist PEP in the control operations, and will provide the equipment, materials and services included and required to control the well, and where applicable, for drilling a relief well or wells. The expenses and costs arising from the above will be borne by PEP.

PEP will be solely liable for environmental damages arising as a result of the activities related to hydrocarbons under the terms of article 3 of the Regulations of the Regulatory Law from Article 27 of the Constitution in the Area of Petroleum. Therefore, in no case will the CONTRACTOR be deemed liable for the loss of hydrocarbons, for general production losses or for damages caused to third parties or the environment as a result of PEP’S own operation. Consequently, it will release the CONTRACTOR from any obligation for any claims arising from seepage or any other uncontrolled flow of oil, gas, water or any other substance that comes from the subsoil.

PEP will be responsible for the general administration of the project, as well as for providing the basic drilling schedules, designing and defining the seating depth of the casing pipe, deciding upon the core cutting intervals, defining the production equipment, selecting the discontinuous intervals, defining the production testing and generally selecting and requesting the performance of any of the optional work from the CONTRACTOR, and where applicable defining the capping of abandoned wells.

The CONTRACTOR will be liable for any contamination, including its control and removal, that originates on the ground surface or in the sea due to leaks, spills or dumping of gas, fuels, lubricants, engine oils, drilling fluids, completion and drilling cuts, pipe grease, solvents, ballasts, sediment, garbage, sewage or any other liquid or solid of any nature in the possession and control of the CONTRACTOR.

The CONTRACTOR will not be liable for damage or a loss to any formation, strata or reserve under the surface, with the understanding that the CONTRACTOR is under the obligation that

when performing the work, it will use the best available international practices, the proper, advanced and safe technologies, and the fluids used will meet the appropriate physicochemical, geological and filtering properties.

The CONTRACTOR pledges that the handling, use and disposal of any substance, waste, particle or contaminating material, including any form of energy, will be carried out in accordance with the GENERAL LAW FOR COMPLETE WASTE PREVENTION AND MANAGEMENT and other applicable provisions.

Notwithstanding the foregoing, the damages that either of the parties may cause to the other and/or third parties due to their negligence, misconduct or bad faith, with be borne by the party that causes them. When said damages arise without negligence, misconduct or bad faith from either of the parties, each of them will bear their own costs without a right to compensation.

It is agreed that under no circumstance will the parties be liable to each other for indirect damages of any nature, punitive damages or non-immediate consequential damages, including those arising from fire, explosion, surface rupture or loss of control of any well.

When one of the parties causes damage and the affected party demands the repair of said damage from the party that did not cause it, and this has been given by a judicial or administrative decision, the party that caused it shall pay the amounts that the defendant may have incurred as a result of the actions, complaints, lawsuits, claims, trials, proceedings, taxes, costs and direct and immediate expenses, including lawyers’ fees and legal costs, regulated at the corresponding fee.

The risks, conservation and cleanliness of the work up to the time of its delivery will be the responsibility of the CONTRACTOR, as well as compliance with what is stated in articles 90 and 91 of the Regulations of the Law of Public Works and Related Services.

ACCEPTANCE OF THE WORK. The acceptance of the work will be done in accordance with article 64 of the Law of Public Works and Related Services, and articles 135, 136, 137 and 138 of its Regulations. Acceptance of the work will be recorded in the corresponding certificate.

Once the work hereunder has been concluded, the complete acceptance of said work will proceed. For the purposes of the foregoing, the CONTRACTOR will notify PEP in writing or through a record that is made on the log, of the full completion of the work, indicating that all of this work is completed in accordance with the terms of reference of this contract. Within fifteen (15) calendar days following the date of receipt of the aforementioned notification, the resident service supervisor will verify that the work is properly concluded, and must prepare the corresponding support certificate.

If during verification of the work, the site supervisor’s office observes deficiencies in the performance and completion thereof, or decides that it has not been performed according to the contract terms of reference, it will request in writing that the CONTRACTOR repair or correct it, so that it may be performed pursuant to the provisions established in this contract. In this scenario, the agreed verification period of the work in the contract may be extended for the period of time agreed upon by the parties to correct the deficiencies. The foregoing is without prejudice to PEP deciding to rescind the contract.

When defects or latent defects appear within the year following the completion date that is established in the acceptance certificate, in the work performed or goods provided for executing the purpose of this contract, PEP will request their immediate repair or replacement, which the CONTRACTOR will complete without any entitlement to compensation. If the CONTRACTOR should not attend to the requirements of PEP within the stipulated period, the latter may entrust the repair or replacement to third parties or do it directly, under the terms of the applicable legal provisions, at the expense of the CONTRACTOR.

CONTRACT SUSPENSION. PEP has the power to suspend temporarily, in whole or in part, the work contracted in any state in which it is found, on justified grounds or of general interest, and may decide on the temporary nature of the suspension, which may not be extended or be indefinite, without this implying the termination of the contract. For this reason, PEP will notify the CONTRACTOR, stating the causes bringing this about, the date it will start and the probable resumption of work, as well as the actions that it must consider with regard to personnel and construction equipment. In all cases of suspension, the site supervisor’s office will prepare a support certificate that will contain at least what is indicated in article 117 of the Regulations of the Law of Public Works and Related Services.

The completion date will be extended proportionately to the period that includes the suspension, without modifying the agreed performance period. The deficient supply of materials and permanent installation equipment by the CONTRACTOR will not be grounds for suspending the work, when said supply is the responsibility of the CONTRACTOR.

When the suspension of work is decided due to causes attributable to PEP, the CONTRACTOR may request the payment of non-recoverable expenses from the time of notification that terminates the suspension, provided these are reasonable, duly proven and related directly to this contract, as stated in article 62 of the Law of Public Works and Related Services, and are generated during the suspension. These expenses will be limited to the provisions of article 116 of the Law of Public Works and Related Services.

If during the validity of this contract there are suspensions of work, which periods are reduced and difficult to quantify, the parties may agree that the periods be grouped on a monthly basis and formalized by signing a single support certificate, which will be prepared on the first day of the month following the month on which these suspensions had taken place.

When the suspensions arise from an act of God or force majeure, there will be no liability whatsoever to the parties. They must only sign an agreement where it acknowledges the period of the suspension and the dates for restarting and ending the work, without modifying the execution period established in the contract. Therefore, only the payment of non-recoverable expenses indicated in the second paragraph of article 119 of the Regulations of the Law of Public Works and Related Services will proceed.

When the continuation of services is made impossible by the act of God or force majeure, the CONTRACTOR may choose to not carry them out. In this scenario, it shall observe the provisions of the clause named “EARLY TERMINATION OF THE CONTRACT” of this agreement in principle.

When it is PEP who decides to rescind the contract, said rescission will be fully legal by operation of law and without the need for a court declaration. Completion of the procedure that is established in the following clause will be sufficient. When it is the CONTRACTOR who decides to rescind the contract, it will need to go to the corresponding lower court and obtain the respective declaration.

In the case of a contract rescission due to causes attributable to the CONTRACTOR, once the respective decision has been issued, PEP will abstain from paying the amounts resulting from services rendered that are not yet settled, until the appropriate settlement is executed, as a precaution and from the time said rescission commences. This shall be done within 30 (thirty) calendar days from the date on which this decision is communicated, in order to proceed to exercise the guarantees. The cost overrun for work not yet performed that is delayed, shall be provided for in the settlement, as well as all that concerns the recovery of materials and equipment that have been delivered to it, where appropriate.

Once PEP has notified of the commencement of the contract rescission procedure, PEP will proceed to take immediate possession of the work performed to take charge of the property and the respective facilities and to suspend the work. With or without the presence of the CONTRACTOR, the site supervisor will prepare a support certificate of the status of the work, which shall at least contain what is stated in article 130 of the Regulations of the Law of Public Works and Related Services. This certificate will serve as a basis for the corresponding settlement. The support certificate will be prepared in the presence of a Notary Public.

PEP may, along with the CONTRACTOR, reconcile the balances arising from the rescission in order to preserve the interests of the parties within the settlement. PEP may record in the settlement the acceptance of the work that the CONTRACTOR has performed until the rescission of this contract, as well as the equipment and materials that had been installed on site or are in the process of manufacturing, provided they are subject to use within the incomplete work, and must in all cases adhere to sections I, II, III and IV of article 132 of the Regulations of the Law of Public Works and Related Services.

When the contract is rescinded due to causes attributable to PEP, it will pay for the work performed, as well as the non-recoverable expenses, provided these are reasonable, duly proven and related directly to this contract, as stated in article 62 of the Law of Public Works and Related Services.

The cost overrun is the difference between the amount that it would represent for PEP to conclude the pending work with another CONTRACTOR and the cost of the unperformed work at the time this contract is rescinded. In order to determine the cost overrun and its amount, PEP will proceed according to the instructions of article 134 of the Regulations of the Law of Public Works and Related Services.

In the event that the contract is rescinded under the terms of this clause, PEP may choose between applying the contractual penalties or the cost overrun as referred to in the above paragraph, under the terms of section II of article 62 of the Law of Public Works and Related Services.

The CONTRACTOR will be under obligation to return all documentation to PEP that PEP had delivered to it for performing the work, within a period of 10 (ten) calendar days, from the commencement of the respective procedure.

RESCISSION PROCEDURE. If PEP deems that the CONTRACTOR has violated any of the grounds for rescission that are stated in this contract, it will proceed as follows:

1.      The rescission procedure will begin from the time that the CONTRACTOR is notified of the breach of contract that it has incurred, so that within a term of 15 (fifteen) business days, it may provide an explanation as it is entitled and provide the proof that it deems appropriate;

2.      Once the term has passed as referred to in the above point, a decision will be made in consideration of the arguments and proof that had been presented; and

3.      The decision to (not) rescind the contract shall have a proper basis and grounds and be duly communicated to the CONTRACTOR within 15 (fifteen) business days following the date on which it has given its answer.

In the event that PEP decides to rescind the contract, said rescission will take effect from the notification date of the respective decision, so it may proceed according to section II of article 62 of the Regulations of the Law of Public Works and Related Services, without the need for a court ruling.

The CONTRACTOR acknowledges and accepts that the public servant that is signing this contract in the name and on the behalf of PEP, or the public servant that has the powers to do so, will be the ones who, where applicable, perform each and every one of the processes related to the administrative rescission procedure of this contract, and indicate the following by way of illustration but not limitation: determining the beginning of the administrative rescission procedure, processing all of the stages of the same and for deciding upon its administrative rescission, and other actions that may be necessary for the administrative rescission procedure.

The CONTRACTOR grants PEP a permanent, transferable, non-exclusive license that is free of fees to use all concepts, products, processes (patentable or not), material protected by copyright (including but not limited to: documents, specifications, calculations, maps, drafts, notes, reports, data, models, samples, plans, designs and software) and information that is the property of the CONTRACTOR, once the performance of the work established in this contract has commenced, and is used by the CONTRACTOR or provided or delivered to PEP by the CONTRACTOR during the provision of the work hereunder.

All concepts, products, processes (patentable or not), material subject to protection or protected by copyright (including but not limited to: documents, specifications, calculations, maps, drafts, notes, reports, data, models, samples, plans, designs and software) or information that is the exclusive property of PEP that had been developed, produced or put into practice for the first time by the CONTRACTOR or any of its employees as a result of the performance of the work hereunder, will be the property of PEP once it is created, whether it was delivered to PEP or not at the time it was created. Where applicable, it must be delivered to PEP when it so requires.

If PEP so requires in writing, the CONTRACTOR shall do all that is necessary in favour of PEP and in the manner that the latter indicates, to obtain patents or copyrights on any part of the result of the work, provided this part is patentable or may be subject to copyrights. This is with the understanding that the patents, copyrights or any other exclusive right that arises from this contract will invariably be created in favour of PEP.

The CONTRACTOR guarantees that said information will be disclosed to its employees only to the extent that they need to know, and that it will not make any announcement, take any photographs or provide information to any member of the public, press, business entity or any other official body, unless it has obtained the prior written consent from PEP.

For the purpose of compliance with the above obligations, the CONTRACTOR agrees to take all necessary measures to ensure that its personnel will keep said information in the strictest of confidence, which include but are not limited to: establishing procedures in consultation with PEP to ensure the confidentiality of said information, and taking the necessary measures to prevent its disclosure to any unauthorized party. It also agrees to remedy any unauthorized disclosure, including but not limited to requiring the execution of confidentiality agreements for its employees and instituting security measures.

Notwithstanding the foregoing, this confidentiality obligation will not apply to the information of that nature that was known previously by the CONTRACTOR, or that was made available to it on an unrestricted and non-confidential basis, whether it is or may become generally available to the public in a manner other than the erroneous dissemination of the CONTRACTOR personnel.

Likewise, both parties acknowledge and accept to consider all information (technical, legal, administrative, accounting, financial, etc.) that is documented in any support material as confidential, which has been developed and is directly or indirectly related to the award procedure, or during the performance of the work, as well as all information or documentation that causes any claim or technical dispute.

The confidentiality obligations contained in this clause will remain in effect for a period of twelve (12) years from the completion or rescission date hereof.

The CONTRACTOR, for each difference, may only file one claim to the site supervisor, and for its disagreement with the decision to the claim, a technical or administrative dispute under the terms of this clause.

In order to reach a decision on the claim, the site supervisor will perform the pertinent consultations and will bring together the necessary elements and/or documents. The site resident will have a period of 10 (ten) calendar days from the receipt of the request made by the CONTRACTOR to issue his decision in writing and make it known, establishing the contractual basis for his decision.

Once having received the decision from the site supervisor’s office, the CONTRACTOR will have a period of three (3) calendar days to notify of its rejection. Otherwise it will be deemed as accepted.

If the CONTRACTOR accepts the final decision, the site supervisor will proceed to issue the corresponding document, and where applicable, will proceed with the formalization of the corresponding agreement.

If the decision from the site supervisor is not accepted by the CONTRACTOR, it may request that the claim be reviewed as a dispute of a technical or administrative nature.

If the CONTRACTOR chooses to have the claim reviewed as a dispute of a technical or administrative nature, it will discuss the same aspects that gave rise to its claim, and therefore may not add additional, supplementary or complementary petitions, rectify defects, make corrections or replacements to the original claim.

The dispute procedure of a technical or administrative nature will be carried out in the following manner:

The CONTRACTOR shall submit it in writing to PEP, with a copy to the site supervisor, indicating the disputed topics, within 3 (three) calendar days following the date on which the CONTRACTOR had received the final decision of the site supervisor, regarding the resolution of the claim.

The request that the CONTRACTOR may make in this regard shall indicate whether it is a dispute of a technical or administrative nature that is subject to resolution, and will contain the following as a minimum:

a) Itemized description of the facts under dispute, listing them specifically with the documentation that proves them;

b) Clear and precise indication of its intentions, stating the arguments and contractual and legal provisions that support its claim;

c) Documentation verifying the facts upon which its dispute is based, duly organized and identified by the attachment number.

The Office of the Deputy Manager of Contract Services D.N. of P.E.P. may decide for itself on the dispute of a technical or administrative nature which has been exercised by the CONTRACTOR, or delegate this power to the department that it deems pertinent, in which case it will notify the CONTRACTOR of the name of the designated department, sending a copy to the site supervisor.

The Office of the Deputy Manager of Contract Services D.N. of P.E.P. or where applicable, the designated department, will verify that the dispute has been submitted in due time and form, otherwise it will reject it. If the dispute is not rejected, the Office of the Deputy Manager of Contract Services D.N. of P.E.P., or where applicable, the designated department, will notify the CONTRACTOR of the commencement of the dispute procedure, who will have 10 (ten) business days to submit any documents or allegations that it deems necessary, which it had not submitted with its request. The Office of the Deputy Manager of Contract Services D.N. of P.E.P., or where applicable, the designated department, will proceed to analyze and study the topic in dispute and will summon the CONTRACTOR in writing within a period of 3 (three) days from the submission of the dispute, to initiate clarifications.

During the clarifications, the parties will meet as many times as necessary and the assigned department shall notify the CONTRACTOR of its decision within 30 (thirty) calendar days following its commencement.

If the CONTRACTOR accepts the decision on the dispute of a technical or administrative nature, the Office of the Deputy Manager of Contract Services D.N. of P.E.P., or where applicable, the designated department, will notify the site supervisor, who will issue the corresponding change order, and where appropriate will proceed with the formalization of the respective agreement, thus concluding the procedure for the resolution of claims and disputes of a technical or administrative nature with legal effects on the parties.

CONCILIATION. The CONTRACTOR will be entitled to file a complaint to the Ministry of the Civil Service, if it deems that PEP has breached the terms and conditions agreed to in the contract. The conciliation procedure will be substantiated in terms of the provisions of articles 89 to 91 of the Law of Public Works and Related Services.

In the event that the parties come to conciliation, the respective agreement will be binding upon them and their compliance may be demanded by the corresponding legal channel. Otherwise their rights will remain intact, so that they may exercise them at the respective lower court.

THIRTY-FIVE

THIRTY-SIX

TRAINING AND CONDUCT OF THE CONTRACTOR PERSONNEL. All CONTRACTOR personnel who perform any activity within PEP facilities as a result of the performance of the work hereunder will be bound to comply with the Industrial Safety, Occupational Health and Environmental Protection provisions indicated in Attachment “S” “Safety, occupational health and environmental protection obligations of the Suppliers or Contractors that perform activities at the facilities of PEMEX Exploración y Producción”, without prejudice to the other legal provisions that the CONTRACTOR is under obligation to meet, as well as those that PEP may issue following the signing of this Contract.

Likewise, the CONTRACTOR is under obligation to prove to PEP, prior to the commencement of the work, that the personnel who will perform the work have received training by a duly authorized company in the last 12 (twelve) months, according to the provisions of the Federal Labour Law, in the areas that are related to the work to be performed, as well as in the areas of Industrial Safety, Occupational Health and Environmental Protection.

In the event that the CONTRACTOR does not reliably prove to the satisfaction of PEP that its personnel have received training in the areas of Industrial Safety, Occupational Health and Environmental Protection, it may not enter PEP’S facilities, and therefore any delay in the work execution schedule arising from this breach of contract will not be grounds for deferring the commencement date of the same or extending the contract execution period.

The CONTRACTOR will take all measures to prevent illegal, seditious or objectionable behaviour by the personnel under its charge, in order to maintain discipline among the personnel who perform the work, whether or not they are in any of the facilities of PEP.

THIRTY-SEVEN

NOTIFICATIONS. The parties undertake to communicate in writing all information that is generated as a result of compliance and execution of this contract, pursuant to the following:

Communications to PEP:

Communications regarding technical issues shall be delivered personally to the site supervisor or the person that he may designate, personally or through any other means of messaging that ensures its receipt at the following address: Boulevard Gonzalez Ortega S/N, a un costado de Bomberos C.P. 93370, Poza Rica, Veracruz.

Communications of an administrative nature shall be delivered personally, or by any other means of messaging that ensures its receipt, to the authorized representative of PEP, the Contract Site Supervision Office of the Drilling Operations Unit of Poza Rica-Altamira, at the address indicated hereafter, sending a copy to the site supervisor and/or PEP supervisor located at Boulevard Gonzalez Ortega S/N, a un costado de Bomberos C.P. 93370, Poza Rica, Veracruz.

Communications to the CONTRACTOR:

Communications regarding technical issues shall be delivered personally to the construction supervisor, or may be sent through any other means of messaging that ensures its receipt at the address indicated in number II.9 of the statement section of this contract.

Communications of a legal or administrative nature may be delivered personally to the legal representative of the CONTRACTOR, or be sent by any other means of messaging that ensures their receipt, to the address indicated in number II.9 of the statement section of this contract.

THIRTY-EIGHT

THIRTY-NINE

FORTY

FORTY-ONE

FORTY-TWO

NATIONAL CONTENT PERCENTAGE. The CONTRACTOR is under obligation to comply with a national content percentage of 5% on the contract amount, determined according to what is indicated in the bidding guidelines that gave rise to this contract. In no case may the CONTRACTOR decrease this national content percentage, without the prior consent of PEP in writing, which will only be given in the case where said percentage is not lower than 5%.

Any substitution of equipment, materials and/or suppliers for those originally proposed by the CONTRACTOR for the purposes of meeting the national content percentage, in accordance with this Clause, shall be authorized by PEP, provided said substitution does not mean changing the amount or the period of the contract, and complies with the specifications of the same and the execution schedule.

PEP will conduct the verification of compliance with the national content percentage established in this clause, once the CONTRACTOR has provided the entirety of the purchase orders for the permanently installed equipment and materials listed in Attachment DT-10. In addition, the CONTRACTOR shall submit to PEP the country of origin declaration for said permanently installed equipment and materials. Said document shall comply with the format and terms of completion indicated in Attachment DT-10.

The CONTRACTOR’S failure to comply with any of the obligations referred to in this clause will be grounds for rescission of this statement of intent.

FORTY-THREE

FORTY-FOUR

ELECTRONIC LOG. The parties, under the terms of the last paragraph of section XIII or article 46 of the Law of Public Works and Related Services, agree that the preparation, control and tracking of the site log for this contract will be kept through the software program named “Electronic Log of the Oil Industry”. To this end, it will be subject to the rules, mechanisms and procedures established in the attachment “BEO” – Terms and Conditions of Use of the Electronic Log.

Consistent with the above, the parties agree that all references in this contract to the term “Log” will be understood as being made to the software program named “Electronic Log of the Oil Industry”.

FORTY-FIVE

DEBT RECOVERY.

The CONTRACTOR gives its authorization so that any amount from prior or current debts, unpaid advance payments, breaches of contract or application of penalties arising from any contract, agreement or legal act entered into with PEP may be deducted from the estimates and settlements of this contract, based upon articles 1832 and 2188 of the Federal Civil Code, with the supplementary application of the Law of Public Works and Related Services, as per article 13 of the same.

This contract is signed in agreement in Poza Rica de Hidalgo, Ver. in three copies, on September 3, 2008.

Technical

/s/ Luis Angel Ayala Gomez

LUIS ANGEL AYALA GOMEZ

OFFICE MANAGER

OFFICE OF THE DEPUTY MANAGER OF

CONTRACT SERVICES, D.N.

Technical

/s/ Arturo Alfredo Musalem Solis

ARTURO ALFREDO MUSALEM SOLIS

OFFICE MANAGER

OFFICE OF THE DEPUTY MANAGER OF

ADMINISTRATION AND FINANCE, D.N.

Major repairs

Minor repairs

Pneumatic pumping conversion

Mechanical pumping conversion

Rehabilitation of pneumatic pumping

Rehabilitation of mechanical pumping

Water injector conversion

Change of flowing rig

Well improvement identification

Infrastructure works (reconditioning of paths and platforms)

Major repairs

Minor repairs

TOTAL

Management

Contract ###-###-####

(Replacement Bid I Contract ###-###-####)

(Replacement Bid II Contract ###-###-####)

(7

(7

Contract ###-###-####

Contract ###-###-####

Total

Manager of Well Drilling and Maintenance North Division

Of the Well Drilling and Maintenance Unit

Performance: this work requires a 375 HP transportable equipment installed in a 4 ax truck with internal combustion engine and electronic control for 8530 feet (2547 m) depths. The equipment is equipped with double drum winch, brake system cooled down by water with pneumatic clutch and impact device in the crown, telescopic mast of hydraulic operation, with 69 feet (21.04 m) height and 151,746 pound (68,892 Kg) loading capacity equipped with traveling pulley, crown and 6 line caparison, mechanical pump hanging rod device, continuing stairs to the crown, three-stage hydraulic jack, anti wind for mast fixing, hanging device and “chango” exhaust line, hydro pneumatic control dashboard; weight, pressure and torque indicator, emergency and alarm stop. It includes 5000 psi pressure control equipment that consists of double 7  ¹/16” preventing device with 2  ³/8” to 4  ¹/2” rams with 2  ¹/16” lateral exits, as well as a rod preventing device.

Process: Contractor shall perform the works in mechanical pump production gears, change the pumps with rod equipment, rod recoup and/or new rod kit installation with 375 HP rod equipment under the program requested by PEP as stated in the work order.

Verification: PEP’s supervisor shall verify compliance of the operation requested with the work order.

Measurement: Payment units are calculated in days.

CALIBRATION FOR 2  ³/8” TO 4  ¹/2” PIPELINES WHEN THE OBJECTIVE IS NOT MET

Description: it is the steel line execution process, introduction and recoup of calibration systems for 2  ³/8”-4  ¹/2” diameter pipelines with impression block, paraffin or die-cutters; it includes inner depth (P.I.) verification, print making and 5,000 PSI pressure control equipment. When due to well conditions there is a resistance and an initiated Service is interrupted with a diameter and a new one has to be taken down with a lower one, the depth charge shall be paid considering the maximum achieved, regardless of the number of runs into the well and of the calibrator diameters used for that purpose. 0° to 88° deviation well operations have to be considered (case of horizontal wells). Likewise, with this item, in the event that due to well conditions it is not possible to reach the programmed depth in one of the other steel line work concepts and PEP decides to suspend the operation, payment shall be made by meter according to the maximum depth attained by that operation.

Performance: a winch operator and assistant are needed, as well as calibration tools (print block, paraffin stamper or cutter), weight bars, mechanical scissors, flexible deviator joints (knees), movement joints (mobile), smaller tools like adaptors, flange connections and joints, Steel Line Unit, with mechanical and electronic depth system, surface tension-weight system, as well as operation activities to be performed such as: installation, assembly, testing and uninstalling movements for adequate work performance.

Verification: PEP’s supervisor shall verify compliance with the operation program according to the Work Order.

Process: it is considered to perform pipeline calibration works, inner depth verification and seal printing at a given depth and under PEP’s requested program as stated in the Work Order.

Measurement unit: the amount to be estimated shall be by (meter) depending on the calibrated depth.

Description: it is the fluid depth sample taking process with steel line unit and consists of sample taking with bucket or barrel samplers in the well. It includes well calibration with a minimum  ¹/8” diameter larger than the tool to be introduced and 5,000 PSI pressure control equipment. 0° to 88° deviation well operations have to be considered (case of horizontal wells). Equipment and accessories have to be considered for this item and the same will have to be compatible with PEP’s reservoir laboratory equipment and bottles according to the amount of samples requested by PEP.

Performance: a winch operator and two assistants, calibration tools (printing block, paraffin stamper or cutter), weight bars, mechanical scissors, flexible detour joints (knees) and moving (mobile) joints, minor tools like adapters, flange connections and joints, sample bucket or barrel that supports corrosive environment are needed, as well as 0.600 cc volume Steel Line Units with mode depth recording system: mechanic and electronic, superficial tension-weight system, as well as activities to be performed in the operation such as: installation movements, assembling, testing and uninstalling for adequate work performance.

Process: Works are considered to be performed at a depth and under the registration program for deep sample taking according to the Work Order and PEP’s needs.

Verification: PEP’s supervisor shall verify the quality of the recovered sample, as well as compliance with the operation program according to the Work Order.

Measurement Unit: the amount to estimate shall be by (work) depending on the program requested by PEP. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.

Description: it is the process of performing with steel line tool the introduction and recoup for shirt opening and closing, supplied by PEP. The goal of shirt opening is to establish communication between production pipelines and the annular space. The closing shirt is to isolate that communication, including calibration and 5,000 PSI pressure control equipment. 0° to 88° deviation well operations are to be considered (case of horizontal wells).

Performance: a winch operator and two assistants, calibration tools (printing block, paraffin stamper or cutter) are required, together with operation tools according to the type of shirt within the well (example, Otis type “B”, Camco, Baker shirt operator, etc.), weight bars, mechanical scissors, flexible detour joints (knees) and moving (mobile) joints, minor tools like adapters, flange connections and joints, Steel Line Units with depth system mode: mechanic and electronic, superficial tension-weight system, as well as activities to be performed in the operation such as: installation movements, assembling, testing and uninstalling for adequate work performance.

Process: Works are considered to be performed with Steel Line Unit and accessories to perform opening and/or closing operation of sliding shirts that allow communication or not between production pipelines and the annular space at the designated depth and under the program requested by PEP in the Work Order.

Verification: PEP’s supervisor shall verify compliance with the operation program for the opening and/or closing operation of the sliding shirts that allow communication or not between pipelines and the annular space according to requests contained in the Work Order.

Measurement Unit: the amount to estimate shall be by (Work) depending on the program requested by PEP. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.

Description: it is the process of performing with steel line the introduction and placement of a mechanical stopper supplied by PEP within a production pipeline to try to maintain all the rig with pressure, the middle tree valves or as an additional safety device while changing the middle tree valves by preventing devices or vice versa, including calibration and 5,000 PSI pressure control equipment. 0° to 88° deviation well operations are to be considered (case of horizontal wells).

Performance: a winch operator and two assistants, calibration tools (printing block, paraffin stamper or cutter) are required, together with the respective accessories for stopper placement or recoup (mechanical lock, blind stopper with matching system, releaser and fisher as well as its respective matching extensions), depending on its type or brand (example, Otis, Camco MA and CA, Baker FWG stopper, etc.), weight bars, mechanical scissors, flexible detour joints (knees) and moving (mobile) joints, minor tools like adapters, flange connections and joints, Steel Line Units with depth measurement system in mode as follows: mechanic and electronic, superficial tension-weight system, as well as activities to be performed in the operation such as: installation movements, assembling, testing and uninstalling for adequate work performance.

Process: Placement and recoup works of the mechanical stopper at a given depth are considered to be performed and under the program requested by PEP in the Work Order.

Verification. PEP’s supervisor shall verify compliance with the operation program for placement or recoup of the mechanical stopper according to the request contained in the Work Order.

Measurement Unit: the amount to estimate shall be by (Work) depending on the program requested by PEP. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.

Description: it is the process of performing placement or recoup of foot or retention valves with steel line to allow a one way flow. Once placed in its nipple, it does not allow any flow from outside into the inner part of the well. The foot valve shall be supplied by PEP, includes calibration and 5,000 PSI pressure control equipment. 0° to 88° deviation well operations are to be considered (case of horizontal wells).

Performance: a winch operator and two assistants, calibration tools (printing block, paraffin stamper or cutter) are required, together with the respective accessories for foot valve placement or recoup (releaser and fisher), depending on its type or brand (example, Otis, Camco MA and CA, Baker FWG stopper, etc.), weight bars, mechanical scissors, flexible detour joints (knees) and moving (mobile) joints, minor tools like adapters, flange connections and joints, Steel Line Units with depth measurement system in mode as follows: mechanic and electronic, superficial tension-weight system, as well as activities to be performed in the operation such as: installation movements, assembling, testing and uninstalling for adequate work performance.

Process: Placement and recoup works of the foot valve at a given depth are considered to be performed and under the program requested by PEP in the Work Order.

Verification. PEP’s supervisor shall verify compliance with the operation program for placement or recoup of the foot valve according to the request contained in the Work Order.

Measurement Unit: the amount to estimate shall be by (Work) depending on the program requested by PEP. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.

Description: it is the process of performing placement or recoup of Pneumatic Pump valves with steel line. The purpose is that these valves operate gas injection into the production pipeline to lighten the column of oil and produce it to the surface. The Pneumatic Pump valve shall be supplied by PEP. Unit Line accessories include calibration and 5,000 PSI pressure control equipment. 0° to 88° deviation well operations are to be considered (case of horizontal wells).

Performance: a winch operator and two assistants, calibration tools (printing block, paraffin stamper or cutter) are required, together with the respective accessories for BN valve placement or recoup (releaser and fisher), weight bars, mechanical scissors, flexible detour joints (knees) and moving (mobile) joints, minor tools like adapters, flange connections and joints, Steel Line Units with depth measurement system in mode as follows: mechanic and electronic, superficial tension-weight system, as well as activities to be performed in the operation such as: installation movements, assembling, testing and uninstalling for adequate work performance.

Process: Placement and recoup works of the Pneumatic Pump valve at a given depth are considered to be performed and under the program requested by PEP in the Work Order.

Verification. PEP’s supervisor shall verify compliance with the operation program for placement or recoup of the pneumatic pump valve according to the request contained in the Work Order.

Measurement Unit: the amount to estimate shall be by (Work) depending on the program requested by PEP. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.

Description. It is the process of performing with steel line placement or recoup of a Pneumatic Pumping shutter to inject gas inside the production pipeline. When it has been placed in its seat. The Pneumatic Pumping shutter shall be supplied by PEP. Line unit accessories include calibration and 5,000 PSI pressure control equipment. 0° to 88° deviation well operations are to be considered (case of horizontal wells).

Performance: a winch operator and two assistants, calibration tools (printing block, paraffin stamper or cutter) are required, together with the respective accessories for Pneumatic Pumping shutter placement or recoup (releaser and fisher), weight bars, mechanical scissors, flexible detour joints (knees) and moving (mobile) joints, minor tools like adapters, flange connections and joints, Steel Line Units with depth measurement system in mode as follows: mechanic and electronic, superficial tension-weight system, as well as activities to be performed in the operation such as: installation movements, assembling, testing and uninstalling for adequate work performance.

Process: Placement and recoup works of the Pneumatic Pump shutter at a given depth are considered to be performed and under the program requested by PEP in the Work Order.

Verification. PEP’s supervisor shall verify compliance with the operation program for placement or recoup of the pneumatic pump shutter according to the request contained in the Work Order.

Measurement Unit: the amount to estimate shall be by (Work) depending on the program requested by PEP. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.

Description. It is the process of performing with steel line recoup of the matching rod of a pneumatic pumping accessory and thus establish communication matching the existing pressures between the annular space and the production pipeline in the rigs that have pneumatic pump chucks. The Pneumatic Pumping matching element of the accessory shall be supplied by PEP. It includes calibration and 5,000 PSI pressure control equipment. 0° to 88° deviation well operations are to be considered (case of horizontal wells).

Performance: a winch operator and two assistants, calibration tools (printing block, paraffin stamper or cutter) are required, together with the respective accessories to recoup accessory equalizing element of pneumatic pumping (special element fishers), weight bars, mechanical scissors, flexible detour joints (knees) and moving (mobile) joints, minor tools like adapters, flange connections and joints, Steel Line Units with depth measurement system in mode as follows: mechanic and electronic, superficial tension-weight system, as well as activities to be performed in the operation such as: installation movements, assembling, testing and uninstalling for adequate work performance.

Process: Recoup works of the equalizing element of pneumatic pumping at a given depth are considered to be performed and under the program requested by PEP in the Work Order.

Verification. PEP’s supervisor shall verify compliance with the operation program for placement or recoup of the equalizing element of the pneumatic pump according to the request contained in the Work Order.

Measurement Unit: the amount to estimate shall be by (Work) depending on the program requested by PEP. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.

TO PLACE AND RECOUP PIPELINE ANCHOR: 2  ³/8”, 2  ⁷/8”, 3  ¹/2” and 4  ¹/2”

Description: It is the process of performing with steel line placement or recoup of the 2  ³/8”, 2  ⁷/8”, 3  ¹/2” and 4  ¹/2” pipeline anchor to prevent a loss of pneumatic

pump valves and accessories during a change of the same. The pipeline anchor shall be provided by PEP. It includes calibration and 5,000 PSI pressure control equipment. 0° to 88° deviation well operations are to be considered (case of horizontal wells).

Performance: a winch operator and two assistants, calibration tools (printing block, paraffin stamper or cutter) are required, together with the respective accessories for pipeline anchor placement or recoup (special fishers and JD type releaser), weight bars, mechanical scissors, flexible detour joints (knees) and moving (mobile) joints, minor tools like adapters, flange connections and joints, Steel Line Units with depth measurement system in mode as follows: mechanic and electronic, steel line superficial tension-weight system, as well as activities to be performed in the operation such as: installation movements, assembling, testing and uninstalling for adequate work performance.

Process: Placement and recoup works of pipeline anchors at a given depth are considered to be performed and under the program requested by PEP in the Work Order.

Verification. PEP’s supervisor shall verify compliance with the operation program for fish displacement according to the request contained in the Work Order.

Measurement Unit: the amount to estimate shall be by (Work) depending on the program requested by PEP. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.

Description: It is the process of performing with steel line the introduction and placement or recoup at a given depth indicated by PEP of the bottom throttle in 2  ³/8”, 2  ⁷/8”, 3  ¹/2” and 4  ¹/2” pipelines. It includes calibration and 5,000 PSI pressure control equipment. 0° to 88° deviation well operations are to be considered (case of horizontal wells).

Performance: a winch operator and two assistants, calibration tools (printing block, paraffin stamper or cutter) are required, together with the respective accessories for bottom throttle placement or recoup (fisher, releaser and bottom throttle packer with different diameters), weight bars, mechanical scissors, flexible detour joints (knees) and moving (mobile) joints, minor tools like adapters, flange connections and joints, Steel Line Units with depth measurement system in mode as follows: mechanic and electronic, steel line superficial tension-weight system, as well as activities to be performed in the operation such as: installation movements, assembling, testing and uninstalling for adequate work performance.

Process: Placement and recoup works of the bottom throttle according to the pipeline diameter at a given depth are considered to be performed and under the program requested by PEP in the Work Order.

Verification. PEP’s supervisor shall verify compliance with the operation program for placement or recoup of bottom throttles according to the request contained in the Work Order.

Measurement Unit: the amount to estimate shall be by (Work) depending on the program requested by PEP. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.

Description: It is the process of performing with steel line placement or recoup of 2  ³/8”, 2  ⁷/8”, 3  ¹/2” and 4  ¹/2” diameter pipelines of an anchor with pressure-temperature recording sensors to provide a mechanism that allows to host and hang measurement instruments, installing them with a mechanical nipple or tubing stop in an anchor tubing less (optional) according to the pipeline’s diameter and to the program indicated by PEP. This work is generally performed in tests with prolonged data monitoring of 7, 15, 20, 30 days, etc. time periods, that will depend on the memory capacity of the data recording instrument. Recoup of the anchor with sensor is done, in general, when the maximum time to obtain information from a used device has been met, either to replace or to definitely withdraw the same. It includes calibration and 5,000 PSI pressure control equipment. 0° to 88° deviation well operations are to be considered (case of horizontal wells).

Performance: a winch operator and two assistants, calibration tools (printing block, paraffin stamper or cutter) are required, together with the respective accessories for placement or recoup of the anchor with pressure and temperature sensor (fisher, releaser, anchor mechanical lock, shock absorber, centralizer and measurement instruments), weight bars, mechanical scissors, flexible detour joints (knees) and moving (mobile) joints, minor tools like adapters, flange connections and joints, Steel Line Units with depth measurement system in mode as follows: mechanic and electronic and superficial tension (weight-tension) system, as well as activities to be performed in the operation such as: installation movements, assembling, testing and uninstalling for adequate work performance.

Process: Placement or recoup of anchor with pressure and temperature sensor at a given depth are considered to be performed and under the program requested by PEP in the Work Order.

Verification. PEP’s supervisor shall verify compliance with the operation program for placement or recoup of anchor with pressure and temperature sensor according to the request contained in the Work Order.

Measurement Unit: the amount to estimate shall be by (Work) depending on the program requested by PEP. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.

Description: The purpose of fish displacement with steel line is to slide and strike with a scissor an obstruction that prevents free passage into the well through the production rig until it may go to the bottom leaving free access to any other tool to be introduced. It includes calibration and 5,000 PSI pressure control equipment. 0° to 88° deviation well operations are to be considered (case of horizontal wells).

Performance: a winch operator and two assistants, calibration tools (printing block, paraffin stamper or cutter) are required, together with the respective accessories for fish displacement (blind box), weight bars, mechanical scissors, flexible detour joints (knees) and moving (mobile) joints, minor tools like adapters, flange connections and joints, Steel Line Units with depth measurement system in mode as follows: mechanic and electronic and superficial tension (weight-tension) system, as well as activities to be performed in the operation such as: installation movements, assembling, testing and uninstalling for adequate work performance.

Process: Resistance or fish displacement works at a given depth are considered to be performed and under the program requested by PEP in the Work Order.

Verification. PEP’s supervisor shall verify compliance with the operation program for fish displacement according to the request contained in the Work Order.

Measurement Unit: the amount to estimate shall be by (Work) depending on the program requested by PEP. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.

Description: The purpose of fishing with a Steel Line Unit is to recoup tools and/or accessories that stayed as fish within the well. It includes calibration and 5,000 PSI pressure control equipment. 0° to 88° deviation well operations are to be considered (case of horizontal wells).

Performance: a winch operator and two assistants, calibration tools (printing block, paraffin stamper or cutter) are required, weight bars, mechanical scissors, flexible detour joints (knees) and moving (mobile) joints, minor tools like adapters, flange connections and joints. There are several fishing tools with specific purposes for this type of operation such as: davit harpoon (for wire fishing), JD or JU type fisher (to fish tool with fish neck), O’Bannon type fisher (for tools without fish neck). Steel Line Units with depth measurement system in mode as follows: mechanic and electronic and superficial tension (weight-tension) system, as well as activities to be performed in the operation such as: installation movements, assembling, testing and uninstalling for adequate work performance.

Process: Fish displacement works with steel line at a given depth are considered to be performed and under the program requested by PEP in the Work Order.

Verification. PEP’s supervisor shall verify compliance with the operation program for steel line fishing according to the request contained in the Work Order.

Measurement Unit: the amount to estimate shall be by (Day) depending on the program requested by PEP. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.

Description: This service shall have all pressure control equipment components for sour environments (H2S and/or CO2) and includes accessories for proper performance such as: flange adapters, nuts and bolts with rings for 5,000 PSI. The team shall present the respective certification, as well as the respective recently preformed tests (not older than one year). This Service must include a basic and original kit of parts.

Performance: A pressure Control Equipment Operator, 5,000 PSI pressure control equipment for sour environments with all necessary components and accessories for its proper performance and operation, as well as several activities to be performed during operation: installation movements, assembling, tests and uninstalling for proper work performance.

Process: Works are considered to be performed with pressure control equipment for sour environments under the requested program as stated in the Work Order and at PEP’s request.

Verification: PEP’s supervisor shall verify compliance with the operation program with 5,000 PSI pressure control equipment for sour environments as requested in the Work Order.

Measurement Unit: The amount to estimate shall be per Day or Day prorate depending on the program requested by PEP and considering full service.

TO DRILL 2  ³/8”, 2  ⁷/8” AND 3  ¹/2” PRODUCTION PIPELINES WITH STEEL LINE EQUIPMENT.

Description: A production pipeline is drilled when the well has to be controlled and its production rig lacks of a sliding shirt. This work is performed with a Steel Line unit.

Performance: An operator and an assistant are required. The equipment consists of a winch, calibration tools, accessories (printing block, paraffin stamper or cutter), a 5000 psi lubricator. The Steel Line unit will be installed, the punching tool shall be assembled and taken down at a depth specified by PEP, the pipeline shall be drilled then withdrawn, well tools shall be tested with pressure and circulation work effectiveness. The charge shall be supplied by PEP.

Process: Works are considered to be performed with Steel Line Unit and accessories to drill production pipelines that allow communication or not among production pipelines and the annular space at a designated depth and under the program requested by PEP in the Work Order.

Measurement Unit: the amount to estimate shall be by (Work) depending on the program requested by PEP and considering complete work. In the event that due to well conditions the programmed depth is not reached and PEP decides to suspend the operation, payment shall be made under Item 15.9. The amount to estimate would be by meter according to the maximum depth reached.