EXHIBIT 10.10

                              MARCIA BARBOSA SERRA

             Tradutora Publica Juramentada e Interprete Comercial
              SWORN PUBLIC TRANSLATOR AND COMMERCIAL INTERPRETER

                     Rua Aperana, 38 apt 301 - Leblon -22450
                       ISS: 1261003-00 - CIC 606442227-00
                                 Tel.: 274:3844

I, the undersigned, Sworn Public Translator and Commercial Interpreter in and
for this City and State of Rio de Janeiro, Federative Republic of Brazil,
registered at the Commercial Board of Rio de Janeiro under Number 97, do hereby
CERTIFY and ATTEST that a document in the Portuguese Language was submitted to
me for translation into English, which I performed according to my Office, as
follows:
                             TRANSLATION NO. 3975/97

(Xerox copy submitted for translation.).......................................

(On paper with letterhead of Petroleo Brasileiro S.A.  PETROBRAS.)............

CONTRACT 101.2.101.97-0.......................................................

                           SERVICES RENDERING CONTRACT
                    SERVICES RENDERING CONTRACT ENTERED INTO
          BETWEEN PETROLEO BRASILEIRO S.A. - PETROBRAS AND THE COMPANY
            MARITIMA NAVEGACAO E ENG. LTDA...........................

PETROLEO  BRASILEIRO S.A.  PETROBRAS,  a mixed economy company,  organized and
existing  under  Law No.  2.004,  dated  10/03/53,  with  head  office  at Av.
Republica  do Chile,  65,  City of Rio de  Janeiro,  State of Rio de  Janeiro,
Federative Republic of Brazil,  enrolled in the General Taxpayers' Registry of
the Ministry of Finance under No 33.000.167/0001-01,  represented herein by the
Executive  Superintendent of Exploration and Production  (E&P),  Engineer LUIZ
EDUARDO G.


                                       (2)

CARNEIRO,  henceforth  called  PETROBRAS,  and the Company MARITIMA
NAVEGACAO E ENGENHARIA LTDA.,  with head office at Avenida Almirante  Barroso,
no  42,  34th  floor,  City  of Rio de  Janeiro,  State  of Rio de  Janeiro,
Federative  Republic of Brazil,  enrolled in the General  Taxpayers'  Registry
of the Ministry of Finance under  No.46.828.596/0001-13,  represented herein by
its President,  Mr. GERMAN  EFROMOVICH,  have agreed upon the present CONTRACT
to render  services,  with the use of the Dynamic  Positioning  Floating  Unit
AMETHYST 5 and its accessories,  described in Attachment I, henceforth  called
the  UNIT,  according  to the  authorization  of  PETROBRAS'  Executive  Board
(MINUTES No.  4.116,  Item No. 24, dated  09/18/97) the parties being bound to
the terms of the  Invitation  to Bid No.  101.0.001.97-6  and subjected to the
following Clauses and Conditions: ............................................

(End of the Qualification) ...................................................


                                      (3)

FIRST CLAUSE - OBJECT.........................................................

1.1.    The object of the present CONTRACT is the rendering, by the CONTRACTOR,
        of the services of evaluation and/or completion and/or workover of oil
        and/or gas (vertical, directional and horizontal) wells, in the
        Brazilian continental shelf, down to a maximum depth of 5,000 (five
        thousand) meters, in a water depth down to 1,200 (twelve hundred) meters
        by using the UNIT................................................

1.1.1.  For the fulfillment of the present CONTRACT, the CONTRACTOR is to
        maintain its base of operation in the City of Macae-RJ................

1.2.    The services object of the present CONTRACT are contained in the
        Continental Shelf Activities and Disbursement and Cost Plans, under the
        following codes: .....................................................

        B 12100-Boring-Production Development.................................

        A 22100-Boring-Exploratory Drilling...................................

        B 13200-Completion and Intervention for Evaluation-Production
           Development........................................................

        A 24200-Intervention for Evaluation-Exploratory Drilling..............

        C 15200 = Workover Operation..........................................

(End of Clause)...............................................................


                                       4

SECOND CLAUSE - PERIOD OF VALIDITY  AND DURATION..............................

2.1.    Period of Validity-The present CONTRACT binds the parties as of its
        signature.............................................................

2.2.    Duration-The present CONTRACT will have a duration of 2,190 (twenty-one
        hundred and ninety) days..............................................

2.2.1.  Beginning of the CONTRACT-The beginning of the CONTRACT will occur when
        the UNIT is released by PETROBRAS, through a written notice, to begin
        the operations, after the general equipment testing foreseen in item 3.1
        is carried out........................................................

2.2.2.  Automatic Extension-If at the end of the duration mentioned in 2.2, some
        operation is still being performed in a well, the duration of the
        present CONTRACT will be automatically extended, until the completion of
        the works in said well, considering as the final limit the Unit's
        arrival at the port or sheltered waters chosen by common agreement
        between the parties and, also, in case there are still PETROBRAS'
        equipment aboard the UNIT, the completion of the withdrawal of such
        limit.................................................................

2.2.3.  This CONTRACT may be extended for successive periods of 365 (three
        hundred and sixty-five) consecutive days, through a prior agreement
        between the parties, by means of an Addendum, the other contract
        conditions being complied with, and limited to a maximum contract period
        of 2,190 (twenty-one hundred and ninety) days ........................

2.3.    Arrival in Brazil - The UNIT should arrive at the port or in sheltered
        waters, in Macae-RJ. The beginning of operations should occur up to the
        date of 07/06/99, the provision set forth in item 9.1 of this CONTRACT
        being complied with ..................................................

2.3.1.  At the port or in sheltered waters mentioned in 2.3, the customs and
        helideck inspections in the UNIT will be carried out, as well as the
        loading/unloading of the Contractor's and


                                       5

        PETROBRAS' materials, and also the general equipment testing will begin
        as foreseen in item 3.1 of this
        CONTRACT..............................................................

(End of Clause)...............................................................


                                       6

THIRD CLAUSE - CONTRACTOR'S OBLIGATIONS.......................................

3.1.    Before the beginning of the CONTRACT, the CONTRACTOR will arrange for a
        general test of the operating conditions of all of the Unit's equipment,
        as provided for in ATTACHMENT VIII, in the presence of PETROBRAS'
        Inspection. The occurrences found during the performance of the tests
        will be duly recorded in the Daily Drilling Certificate (ADP) signed by
        PETROBRAS' Inspection and by the Contractor's representative. The
        CONTRACTOR will be released to begin operations after proving the good
        operating conditions of the equipment which comprise the Unit's main
        systems, such as, energy generation and distribution system, anchoring
        system, industrial safety, liquid and bulk storage, fluid circulation
        and processing, safety and wellhead, column elevation, rotation and
        handling, columns, instrumentation, formation test equipment and
        communications system.................................................

3.1.1.  The tests referred to in 3.1 will be made in a period estimated in 3
        (three) days, after which the UNIT will be released to sail nothing
        pending in the Unit's main systems, as defined in item 3.1............

3.1.1.1. In the event the tests last for a period exceeding 3 (three) days, for
        reasons ascribed to PETROBRAS, the rate foreseen in REF 104 (WAITING
        RATE) of ATTACHMENT II, will be due, applied as of the fourth day of
        tests, until the UNIT is released. The periods spent with equipment
        repair will not be calculated for the purpose of counting such duration,
        and also no fee will be due during such periods......................

3.1.2.  PETROBRAS may opt for the partial or total performance of the receipt
        tests, in sheltered waters, in the deepest water depth set forth in the
        CONTRACT, or still in the first location..............................


                                       7

3.2.    Operation -To render the services object of this CONTRACT using the
        UNIT and the equipment listed in ATTACHMENT I, complying with the other
        conditions of and ATTACHMENTS to this CONTRACT, according to the
        international standards recommended for services of such nature.........

3.2.1.  Safety Standards - The CONTRACTOR will carry out the services in strict
        compliance with the international safety standards for work of such
        nature, aiming at the protection of personnel, materials and equipment
        that belong to it, PETROBRAS and third parties. PETROBRAS' Safety Rules,
        which the CONTRACTOR states to know will be particularly complied with.
        In the event of conflict, between PETROBRAS' standards and the
        Contractor's, the Contractor's Standards will prevail, unless PETROBRAS
        expressly requires to the contrary in each case............... .......

3.3.    Supply of Materials - To be responsible for the purchase, when requested
        by PETROBRAS, in the domestic market, of other materials needed to
        render the services object of this CONTRACT. The purchase of the
        materials mentioned in this item will be submitted to the prior approval
        by PETROBRAS which will reimburse them as set forth in item 4.2.....

3.3.1.  The materials mentioned in item 3.3 will be delivered by the CONTRACTOR
        to PETROBRAS, at the port or airport the latter indicates.............

3.3.2.  To submit the expense vouchers in the maximum period of 60 (sixty)
        consecutive days after the actual date of the purchase................

3.4.    Services by Third Parties - To request, when asked by PETROBRAS, other
        specialized services available in Brazil, related to the object of this
        CONTRACT, behooving the CONTRACTOR all measures for their actual
        performance, including the obtainment of PETROBRAS' prior and express
        approval of the costs arising therefrom, which will be reimbursed as set
        forth in item 4.2.....................................................


                                       8

3.5.    Personnel - To be liable, in its own name, and for its own
        responsibility and onus, for all personnel needed for the efficient and
        complete performance of the services object of this CONTRACT which will
        operate on the basis of 24 (twenty-four) hours a day and 7 (seven) days
        a week. The list of the minimum personnel to be used by the CONTRACTOR
        is basically the one mentioned in ATTACHMENT V.......................

3.5.1.  The CONTRACTOR guarantees that the personnel mentioned in ATTACHMENT V
        will allow it to fully carry out the performance of the services object
        of this CONTRACT, running, as a result, for its own account, all
        charges arising from the need to increase the personnel..............

3.5.2.The CONTRACTOR will be liable for the maintenance and cost of the
        personnel required for the fulfillment of the operational and safety
        rules and regulations issued by the proper authorities, including the
        compliance with the provisions of the PORTOMARINST No. 13-02, dated
        06/26/85, and of the Navy Department, Ports and Coasts Authority......

3.5.3.  The technical personnel should possess proven competence in their
        specialization, and the CONTRACTOR is to supply PETROBRAS with their
        respective "curriculum vitae".........................................

3.5.4.  To provide for training and/or recycling of its personnel in the Course
        on BASIC SAFETY NOTIONS, held by PETROBRAS, according to the program and
        conditions to be agreed upon between the parties .....................

3.5.4.1. For Superintendents on Board, for the Persons in Charge and for the
        Drillers, a qualification certificate in well control supplied by
        PETROBRAS or by a Training Center qualified by IADC or IWCS will be
        required...................................

3.6.    To be liable for all charges regarding the contracting of its personnel
        and any additional that are or may become due, as well as for the
        withholding and payment of social, labor and


                                       9

        social security contributions set down by the Law, and other charges
        that may become due at any title, being for all purposes, the sole
        employer..............................................................

3.6.1.  Whenever requested by PETROBRAS, the CONTRACTOR will submit the
        documents regarding the proof of payment of its labor obligations,
        including social security contributions (CD Negative Debt Certificate)
        and FGT. deposits, regarding its employees............................

3.6.2.  To make sure that its personnel, who work in activities or operations
        that subject them to. noxious agents, included in the list referred to
        in Article 58 of Law No. 8.213/91, are not retired in this special
        condition, according to the restriction expressly contained in Article
        3rd of Law No. 9.032 dated 04.18.95...................................

3.7.    To bear all measures and expenses with displacement of personnel, such
        as, but not limited to, transportation from abroad to the port or
        airport of Macae-RJ, as indicated by PETROBRAS, and the, return to the
        place of origin, and any and all expenses with personnel travel and
        stay in Brazil, insurances, medical and hospital expenses, meals,
        passports, as well as for extra expenses caused by delay or cancelling
        of flights, be it due to bad weather or to the non-availability of
        planes................................................................

3.8.    To promote, without charges to PETROBRAS, the replacement and immediate
        withdrawal of any of its employees that may be required by PETROBRAS at
        any time, due to bad behavior, technical deficiency, inefficiency or
        health conditions....................................................


                                       10

3.9.    Whenever requested, to train PETROBRAS' personnel in the services object
        of the present CONTRACT...............................................

3.10.   All correspondence between the CONTRACTOR and PETROBRAS will be written
        and forwarded in Portuguese

3.11    To provide, in the UNIT chartered for the performance of the services
        object of this CONTRACT, lodging, food, mess room services, rendered by
        a Brazilian company, for PETROBRAS' personnel and those of third parties
        at PETROBRAS' service, up to the maximum of 26 (twenty-six) persons,
        being agreed that the CONTRACTOR will freely supply 1300 (thirteen
        hundred) meals per month. The meals exceeding this number will be paid
        by PETROBRAS, based on the rate set forth in the Unit Price Spreadsheet
        appearing in ATTACHMENT III.

3.11.1. The quality of the mess room services and the food supply are the
        contractor's responsibility, who will maintain a permanent supervision
        by a male nurse on board and eventually by a qualified nutritionist.
        PETROBRAS may require that the CONTRACTOR takes measures in the event
        such services show a loss in quality standards........................

3.12.   Insurances - To provide, for its account, the contracting of the
        insurances necessary to fulfill this CONTRACT and the Brazilian laws,
        intended to cover its assets and its personnel, even when they are in
        transportation under PETROBRAS' responsibility, as well as the Civil
        Liability insurance for damages and losses caused to third parties,
        which will not imply in limiting the contractor's liability, and it
        should also include PETROBRAS as a third party for the purposes of such
        coverage .............................................................

3.12.1. The minimum mandatory value of the civil liability insurance is of
        US$1,000,000.00 (one million dollars), per event, during the period of
        validity of this CONTRACT and of its eventual extension, which amount
        is to be converted into Brazilian currency on the date the


                                       11

        present CONTRACT is signed. MARITIMA NAVEGACAO E ENGENHARIA LTDA. is to
        appear as co-insured in this policy...................................

3.13.   The franchises which may be established for the insurances mentioned in
        item 3.12, as well as the onus arising from the Insurers' requirements
        and/or, recommendations will fully run for the contractor's account...

3.13.1. The provision of item 3.13 applies also to the insurances of
        transportation made by the CONTRACTOR, regarding the contractor's
        equipment by PETROBRAS, as set forth in item 4.4

3.14.   The keep PETROBRAS free and safe from any and all indemnity claim for
        damages and/or losses of any kind which the CONTRACTOR may have
        sustained as a result of this CONTRACT, whether or not it has made
        adequate and sufficient insurance for such
        circumstances.........................................................

3.14.1. PETROBRAS will be equally kept free and safe from any and all indemnity
        claim for damages and/or losses of any kind which the CONTRACTOR may
        have caused to third parties for its duly proven grossly negligent
        action or omission, arising from this CONTRACT, whether or not it has
        made adequate and sufficient insurance for such circumstances.........

3.14.2. In return, the CONTRACTOR will be kept free and safe from any and all
        indemnity claim for damages and/or losses of any kind, which PETROBRAS
        may have sustained from third parties, or has caused to third parties by
        its duly proven grossly negligent action or omission, as a result of
        this CONTRACT, whether or not it has made adequate and sufficient
        insurance for such circumstances......................................

3.15.   To undertake, up to the limit equivalent to US$500,000.00 (five hundred
        thousand United States dollars) per event, any and all liability for
        death or damages to persons, provided they


                                       12

        are caused by duly proven grossly negligent action or omission on its
        part and/or its employees and/or personnel...........................

3.16.   The CONTRACTOR waives for itself and will require from its Insurers,
        and/or Subcontractors, in any and all insurance made as a result of this
        CONTRACT, the inclusion, in each policy contracted, the provision
        assuring the waiver of any right to subrogation against PETROBRAS.....

3.17.   To submit to the CONTRACT Manager, up to 30 (thirty) consecutive days
        after its inception, as foreseen, in item 2.2.1, the originals of the
        insurance policies made as a result of this CONTRACT, containing all
        essential data, such as insurers, time limits, period of validity,
        amounts insured, and coverage conditions, and with PETROBRAS appearing
        as coinsured, except in the civil liability insurance, of which it will
        participate as a third party

3.17.1. The policies mentioned in item 3.17 will contain a provision that the
        insurances mentioned cannot be amended and/or cancelled without
        PETROBRAS' prior authorization........................................

3.18.   Losses and Damages-The CONTRACTOR will be liable for damages to its own
        equipment and material, and to those which; it and its agents may cause
        to PETROBRAS or to third parties, as a result of its duly proven grossly
        negligent action or omission, in the following cases:.................

3.18.1. In the event of losses of or damages to equipment and/or materials
        belonging to PETROBRAS and/or to third parties, which are aboard the
        UNIT, or during their moving between the UNIT and the support vessels,
        the contractor's liability will be limited to the replacement or repair
        of the equipment so lost or damaged due to the contractor's or its
        employees' duly proven fault. However, the CONTRACTOR will not be liable
        for and will


                                       13

        be kept free and safe from in the event of damages to reservoirs,
        indirect damages or loss of profit of PETROBRAS, losses and damages
        arising from pollution coming from the well, resulting from kick and/or
        blowout...............................................................

3.18.2. In case of losses and damages caused to the well, arising from the
        events mentioned in subitem, 2.1.5 of ATTACHMENT II, the CONTRACTOR will
        reimburse PETROBRAS the payments it comes to make to third parties
        referring to cementing, logging, or other services related to the object
        of the present CONTRACT, as well as to materials (cement, casing, bits,
        completion fluid materials). In the event PETROBRAS opts for the
        definitive abandonment of the damaged well, the CONTRACTOR will
        reimburse the expenses made by PETROBRAS to drill that well...........

3.18.3. In the cases mentioned in subitems; 3.18.1 and 3.18.2. the limit for the
        contractor's liability is of US$500,000.00 per event and its
        deployments...........................................................

3.19.   Secrecy - To maintain complete secrecy on the data and information
        supplied by PETROBRAS, as well as on all of the results and analyses
        arising from the services referring to the present CONTRACT.

3.19.1  All data, information and other documents of any kind, referring to the
        fulfillment of this CONTRACT, are PETROBRAS' exclusive property.......

3.19.2. The CONTRACTOR and its personnel cannot disclose or supply to third
        parties any materials or information obtained as a result of this
        CONTRACT, unless expressly authorized by PETROBRAS....................

3.19.3. The provision of this item 3.19 is a standing obligation, valid even
        after the termination, in any fashion, of the present CONTRACT........

3.20.   The be liable for the violations it commits regarding author's right and
        the use of materials and/or performance processes protected by
        trademarks and patents, as well as for any claims


                                       14

        arising from the bad use it makes of them, running for its account the
        payment of any charges, royalties, fees, commission, indemnities, and
        any other expenses arising from said violation, including the legal
        ones..................................................................

3.21.   Sea Operations To render the services object of this CONTRACT in strict
        compliance with the laws, standards, regulations and administrative
        rules, as well as the instructions issued by the Shipping Office or by
        other proper authorities, specially those regarding the spillage of oil
        and other residues from the UNIT into the sea, being liable, as a
        result, for any charges arising from the violation of such laws,
        standards, regulations, administrative rules and instructions, the limit
        established in subitem 3.21.2 being complied with, and excepting the
        cases provided for in item 3.20 of this CONTRACT......................

3.21.1. To plan and carry out operations intended to prevent and fight oil or
        gas blow outs, fires, or other accidents, complying with the provision
        set forth in item 2.4 of the ATTACHMENT I to this CONTRACT. Although the
        CONTRACTOR is considered fully responsible for such operations, it is
        obliged to discuss the methods to be adopted with PETROBRAS, so as to
        find the best operating solution.......................................

3.21.2. With exception of the cases arising from kick, blow out, surging or
        formation testing, which the CONTRACTOR will be kept free and safe from,
        in the other cases of spillage of petroleum, oil and other residues in
        the sea, the CONTRACTOR will be liable up to the limit of US$500,000.00
        (five hundred thousand American dollars) per event and its deployments.

3.22.   The storage aboard the UNIT, as well as the handling aboard, and between
        the UNIT and support vessels, of materials, equipment, drilling or
        completion fluid additives, chemical additives belonging to PETROBRAS or
        to third parties at the service of PETROBRAS, are the contractor's
        responsibility........................................................


                                       15

3.23.   To bear all expenses, including with diesel oil and transportation of
        the UNIT for dockages, including those arising from act of God or force
        majeure, as defined in the Thirteenth Clause of the CONTRACT............

3.24.   To maintain a hospital ward in the UNIT with at least 2 (two) beds,
        provided with equipment and medicine necessary for the prompt attention
        to sick and injured persons, as determined by the Shipping Office, such
        hospital ward being subjected to periodical inspections by PETROBRAS..

3.25.   The CONTRACTOR undertakes to maintain all conditions required in the
        bidding. stage, during the performance of the SERVICES CONTRACTED.....

3.26.   To maintain an agent accredited and accepted by PETROBRAS in the UNIT or
        in a place previously designated by PETROBRAS, to represent the
        CONTRACTOR in the fulfillment of the CONTRACT ....................

3.27.   To comply with the requests contained in the Service Authorization(s)
        issued by PETROBRAS...................................................

3.28.   To allow, after negotiations between the contracting parties, the
        provisional installation in the chartered vessel, of complementary
        equipment such as, but not limited to: pipes or risers in catenary by
        the J-lay method, or similar, submarine manifolds, provided they do not
        jeopardize the Vessel's safety and are in accordance with the rules of
        the Classification Society............................................

(End of Clause)...............................................................


                                       16

FOURTH CLAUSE - PETROBRAS' OBLIGATIONS.........................................

4.1.    To make monthly payments for the services rendered by the CONTRACTOR due
        to the present CONTRACT, based on the ATTACHMENT II and ATTACHMENT III
        and on the conditions set forth in Clauses Sixth: Readjustment Seventh:
        Measurement and Eighth: Form of Payment, the other ATTACHMENTS, Clauses
        and Conditions of this CONTRACT being complied with.

4.2.  To reimburse, by means of submittal of vouchers, the expenses. with
      materials and services of third parties, according to items 3.3 and 3.4 of
      this CONTRACT. The reimbursement will be comprised of:

      a)    Amount of the bill issued by the supplying and/or service rendering
            company;.........................................................

      b)    Expenses actually made to place the materials in the UNIT;.......

      c)    Cost  of the  :insurance  for  the  materials,  as  authorized  by
            PETROBRAS.   In  the  event  PETROBRAS  does  not  authorize  such
            insurance,  the  CONTRACTOR  will not be  liable  for  losses  and
            damages  of any  kind  that  they  may.  sustain:  until  their
            delivery to PETROBRAS at the port or airport it indicates:........

4.3.    Operations and Locations Program PETROBRAS will provide the CONTRACTOR
        with the Operations Program, in writing and with due antecedence, and it
        also, will notify; on the locations where the services will be rendered,
        so that the CONTRACTOR may adopt, in due time, the measures necessary
        for their performance.......................................

4.4.    Transportation:.......................................................

4.4.1.  PETROBRAS will provide transportation to the UNIT of all of the
        contractor's personnel involved in the rendering of the services, from
        the port or airport indicated by


                                       17

        PETROBRAS in the beginning of this CONTRACT, and vice versa. At its
        exclusive discretion, the transportation to be provided will be by
        helicopter or vessel.........

4.4.2.  PETROBRAS will provide transportation for the material and equipment,
        related to the object of this CONTRACT, from the port or airport
        designated, to the UNIT and vice versa

4.4.3   In any circumstances foreseen in this Item, the granting of insurance
        coverage will not be PETROBRAS' competence, and the CONTRACTOR waives
        immediately, for itself and for its insurers, any return action against
        PETROBRAS or third parties at its service, as a result of the
        transportation provided...............................................

4.4.4.  In the event there is need to program exclusive air transportation, to
        survey the UNIT, by the Navy and/or SHIPPING OFFICE, the costs arising
        therefrom will be charged to the CONTRACTOR ..........................

4.4.5.  PETROBRAS may provide air or sea transportation for the contractor's
        materials, industrial or fresh water and fuel before the beginning of
        the CONTRACT, as defined in item 2.2.1. The costs arising therefrom will
        be reimbursed by the CONTRACTOR to PETROBRAS..........................

4.4.6.  PETROBRAS will provide tugs and support vessels for the UNIT, from the
        location where the general, testing of the equipment is performed, to
        the first location, between locations and from the last location to the
        Brazilian port or sheltered waters closest thereto, which will be chosen
        in common agreement between the parties...............................

4.4.6.1. PETROBRAS will provide the support vessels f or the Unit's positioning
        in the locations to be drilled during the fulfillment of this
        CONTRACT..............................................................

4.4.7.  PETROBRAS may provide tugs and/or support vessels to load and unload
        materials and to handle anchors, in a place to be defined by the
        parties, in cases of inspection and/or dockages, including those arising
        from act of God or force majeure, as defined in the


                                       18

        Thirteenth Clause of this CONTRACT. The costs arising therefrom will be
        reimbursed by the CONTRACTOR to PETROBRAS.............................

4.5.    Fuel and Water To supply, for its account, all fuel and water necessary
        for the performance of the services object of this CONTRACT, from the
        beginning of the CONTRACT, as provided for in subitem, 2.2.1, the
        provisions of item 3.23 of this CONTRACT being complied with..........

4.5.1.  The supply of water mentioned in item 4.5 includes also the industrial
        water intended for cleaning the UNIT.

4.6     Completion Fluid-To maintain the control of the properties of the fluid
        by an accredited employee, as well as to control the stock of materials
        necessary for such purpose...........................................

4.7.    Ancillary Services-To provide, at its expenses and under its
        responsibility, the ancillary services, referring to: cementing,
        formation testing, electric logging, flexitube operation, operation with
        nitrogen, electric wire operation, wireline operation, when they derive
        from PETROBRAS' own programming.......................................

4.8.    At its exclusive judgment, and without any coresponsibility, PETROBRAS
        may cooperate with the CONTRACTOR, assisting it before the Foreign Trade
        Department Trade Exchange Coordinating Office (CTIC), regarding
        proceedings submitted to these Agencies, referring to materials and/or
        equipment pertaining to the rendering of the services object of this
        CONTRACT. Such cooperation, however, will not lessen , the contractor's
        liability for the obtainment of the documents and/or benefits that may
        be the object of the respective proceedings...........................

4.9.    To issue Service Authorization (s) with all information necessary for
        their performance, such as: location, time limit, value scope, and
        beginning and end dates...............................................

4.10.   To notify the CONTRACTOR, in writing, on the imposition of eventual
        fines.................................................................


                                       19

4.11.   To issue the Measurement Bulletin (MB), as set forth in the Seventh
        Clause: Measurement, of this CONTRACT.................................

(End of Clause)...............................................................



                                       20

FIFTH CLAUSE - PRICES AND VALUE...............................................

5.1.    For the rendering of the services object of this CONTRACT, PETROBRAS
        will pay to the CONTRACTOR the rates set forth in ATTACHMENT II and
        ATTACHMENT III to this CONTRACT, under the conditions set forth in
        Clauses Sixth-Measurement Seventh-Measurement, and Eighth-Form of
        Payment...............................................................

5.1.1.  The contract prices include all specified tariffs, supervision,
        administration, taxes, fiscal emoluments and all expenses that fall
        directly or indirectly upon the rendering of the services, including
        profit, needed for its perfect fulfillment, until the end of the
        contract, no price revision claims being therefore valid..............

5.2.    The total estimated value of this present contract is of R$26,117,862.95
        (twenty-six million, one hundred and seventeen thousand, eight hundred
        and sixty-two reais and ninety-five cents)............................

5.3.    PETROBRAS does not undertake to make the payment of the total estimated
        in item 5.2, but of the amount corresponding to the services rendered
        and accepted by PETROBRAS.............................................

5.4.    In the event the UNIT begins the Contract before the time limit of
        630(six hundred and thirty) days granted according to item 2.3 of the
        present CONTRACT, PETROBRAS will grant a bonus for anticipation, varying
        linearly from zero, for zero days of anticipation, up to a maximum
        amount of 30%..(thirty percent) of the value of the mobilization rate,
        for an anticipation greater than or equal to 180 (one hundred and
        eighty) days..........................................................

5.5.    In the event the UNIT suffers a delay regarding the time limit granted
        in item 2.3 of the present Contract, the CONTRACTOR will have its
        mobilization rate reduced in up to 30% (thirty percent), for a delay
        greater than or equal to 90 (ninety) days, which will vary linearly up
        to zero; for zero day of delay.....................................


                                       21

5.6.    In the event the UNIT suffers a delay greater than 90 (ninety) days, as
        of the time limit granted in item 2.3 of the present Contract, besides
        the maximum reduction of 30% (thirty percent) in the mobilization rate,
        the CONTRACTOR will be subjected to the. imposition of fines according
        to items 8.1 and 9.1 of the 91st (ninety-first) to the 180th (one
        hundred and eightieth) day of delay...................................

5.7.    The financial resources necessary for the payment of the services
        object of the present CONTRACT are duly equated and specifically assured
        in the budget for the present fiscal year and foreseen for the
        following ones to cover the period for the total rendering of the
        services..............................................................

(End of Clause)...............................................................


                                       22

SIXTH CLAUSE - PRICE READJUSTMENT.............................................

6.1.    The contract prices in Brazilian currency, will be readjusted yearly,
        after l (one) year as of the month when the CONTRACTOR's proposal was
        submitted has elapsed, for more or for less, as a result of the
        variation of the elements that comprise the readjustment formula, set
        forth in subitems 6.2.1 and 6.2.2 below...............................

6.1.1.  If during the period of validity of this CONTRACT, new legal provisions
        are created which permit the reduction of the periodicity referred to in
        6.1, the parties will make a new agreement regarding the contract
        prices, to expurgate eventual overprices arising from the periodicity
        originally established for the application of the readjustment........

6.2.    The prices set forth in the Unit Prices Spreadsheet-ATTACHMENT III to
        this CONTRACT, will be readjusted by applying the following calculation
        formulae: ............................................................

6.2.1.  For the prices of REF 101, 104 and 105 of the Unit Prices Spreadsheet-
        ATTACHMENT III:

                                  INS          USA          MEQ
                PCR = PCI, [0.55 ----- + 0.10 ----- + 0.35 -----]
                                  ISOo         USAo         MEQo

6.2.2.  For the price referring to extra meals, appearing in the Unit Prices
        Spreadsheet - ATTACHMENT III:....................................

                                            ABR
                               PRC = PCI. [-----]
                                            ABRo

Where: .......................................................................

PCR = readjusted contract price;..............................................

PCI = initial contract price, in force on the date of the contractor's
  proposal;...................................................................


                                       23

INS = Index number of the National  Consumer Price Index (INPC),  published by
      the   Brazilian    Institute   of   Geography   and   Statistics   IBGE,
      corresponding to the months in which the readjustment is due............

INSo= Index number of the INS defined above,  corresponding  to the month when
      the CONTRACTOR's proposal was submitted;................................

USA = value  of the  United  States  dollar  selling  rate  in the  commercial
      exchange   in  force  on  the  30th  day  of  the  month  in  which  the
      readjustment is due;....................................................

USAo = value of the same  rate in force on the 30th day of the  month the
      CONTRACTOR's proposal was submitted;....................................

MEQ  = definitive value of the Wholesale Index - Domestic - Availability -
      Brazil-Production Goods - Machinery, Vehicles and Equipment - Machinery
      and Equipment - Column 15 of the Getulio Vargas Foundation's Magazine
      "Conjuntura Economica", code A0161724, corresponding to the month when the
      readjustment is due;................................................

MEQo = definitive  value of this same index,  corresponding  to the month when
       the CONTRACTOR's proposal was submitted;...............................

ABR = definitive value of the Price Index - Consumer Price - Brazil - Cost of
      Living - Food, Column 1, Code A0201475, of the Getulio Vargas Foundation's
      Magazine "Conjuntura Economica", corresponding to the month when the
      readjustment is due;.....................................

ABRo = definitive value of this same index, corresponding to the month when the
       CONTRACTOR's proposal was submitted ..................................

6.2.3. The reference basis of the CONTRACTOR's proposal is the month of May/97.


                                       24

6.3     PETROBRAS will make the readjustment calculation, expressing its result,
        duly made evident, in the Measurement Bulletin (MB) of the services to
        which it refers, for the purposes of issuing the respective collection
        document.....................................................

6.4.    In the event of delay in the partial or total disclosure of the indexes,
        a readjustment factor will be provisionally used, calculated on the
        basis of the last indexes known by then, at the time the Measurement
        Bulletin (MB) was issued..............................................

6.4.1.  The eventual difference between the definitive and the provisional
        readjustment will be invoiced by the CONTRACTOR after the issuing of the
        Readjustment Bulletin (RB) by PETROBRAS, as provided for in subitem
        7.3.1 of this CONTRACT................................................

6.5.    The readjustment will not include the services performed before the date
        when the reason that justifies it has occurred........................

6.6.    The readjustment factor will be applied with 4 (four) decimal places,
        without rounding off..................................................

6.7.    The CONTRACTOR states that the prices proposed for the performance of
        the services object of the contract have taken into account all costs,
        inputs, expenses and other legal obligations for the complete
        fulfillment of the contract provisions established....................

(End of Clause)...............................................................


                                       25

SEVENTH CLAUSE - MEASUREMENT..................................................

7.1.    Periodicity of the measurements of the services and determination of the
        reimbursable expenses.................................................

7.1.1.  For the services, the measurement will be made monthly, according to the
        procedures mentioned below, with the consequent issuing of the
        respective Measurement Bulletins (MB).................................

        a) the initial measurement of the services will be made between the date
           of the beginning of this CONTRACT and the last day of the calendar
           month;...................................................

        b) The intermediate measurements of the services, corresponding to a
           given month, of the order "m", cover the period between day 01 and
           the last day of the calendar month of the order "m";................

        c). The final measurement of the services will cover the period between
            day 01 of the month "m" and the day of the termination of this
            CONTRACT..........................................................

7.1.2.  The reimbursable expenses, if provided for in the CONTRACT, will be
        determined on any day of the month, according to the vouchers submitted
        to and accepted by PETROBRAS, and more than one determination can be
        made in the same period, covered by the measurement...................

7.1.2.1. The results found will be submitted to the CONTRACTOR on the 5th
        (fifth) working day, as of the submittal of said vouchers, by means of a
        Reimbursement Document (RD), which will be signed by the Manager of this
        CONTRACT, for invoicing purposes......................................

7.1.2.2. The reimbursable expenses and the deductions, if provided. for in the
        CONTRACT, are to be individually made evident in the Reimbursement
        Documents (RD)........................................................

7.2.  Issuing of the Measurement Bulletins (MB)...............................


                                       26

7.2.1.  PETROBRAS, through the Manager of this CONTRACT, at the end of each
        period as mentioned in the letters of subitem 7.1.1 of this Clause, will
        carry out the measurement of the services, gathering the results found
        in the Measurement Bulletin (MB), for the signature of the Manager of
        this CONTRACT and of the CONTRACTOR, complying with the following:

        a) For the initial, intermediate and final measurements ending on the
           last day of CONTRACTOR will receive one of the copies of the MB up
           to the 5th (fifth) subsequent working day, so that it may submit the
           respective collection documents, As provided for in subitem 7.4.1 of
           this Clause;.......................................................

        b) For the final measurement, when the termination of the CONTRACT does
           not occur in the last day of the month, the CONTRACTOR will receive
           one of the copies of the MB, up to the 5th (fifth) working day after
           the termination of the CONTRACT, so that it may submit the respective
           collection documents, as provided for in subitem 7.4.1;............

        c) For each measurement period of the services, only 1 (one) collection
           document may be issued, being understood that collection documents
           with partial values regarding said period will not be taken into
           account for payment purposes, with exception of the cases of
           collection of differences in readjustment, if any;.................

        d) In the Measurement Bulletins (MB), the portions regarding the basic
           and readjustment values, if any, will be made evident, using the last
           definitive factor known by then, and the deductions, if provided for
           in the CONTRACT....................................................

7.3.    Collection of the readjustment difference.............................


                                       27

7.3.1.  For the payment of an eventual readjustment complement, due to the
        non-availability of indexes at the time the MB is issued, PETROBRAS will
        issue a Readjustment Bulletin (RB)....................................

7.3.1.1. The Readjustment Bulletin (RB) will be submitted to the CONTRACTOR on
        the third working day after the, disclosure of the indexes applicable to
        the calculation of the definitive readjustment factor.................

7.4.  Time for the submittal of collection documents..........................

7.4.1.  The CONTRACTOR will submit the respective collection documents to
        PETROBRAS' Financial Department, as mentioned in item 8.1 of this
        CONTRACT, in the following conditions:................................

- - --------------------------------------------------------------------------------
                     MEASUREMENT  OCCASION FOR THE SUBMITTAL OF COLLECTION
TYPE OF MEASUREMENT   DOCUMENTS   DOCUMENTS
- - -------------------  -----------  ----------------------------------------------
INITIAL                MB         Up to the 8th working  day  following the last
                                  day of the performance of the services, and
INTERMEDIATE                      PETROBRAS will make the payment on the
                                  30th consecutive day, as of the final day of
AND FINAL                         the period measured, the provision in subitem
                                  4.1.1 being complied with.

INITIAL                RB         In case of an eventual complement of
                                  readjustment difference, the RB will be issued
                                  up to the 3rd working day after the index to
INTERMEDIATE                      calculate its issuing is known, and the
                                  payment will be made together with the payment
AND FINAL                         of the principal, the minimum of 10 (ten)
                                  working days between the submittal of the
                                  Collection Document and the date of payment
                                  being complied with

DETERMINATION OF       RD         In the first working day after the DR is
REIMBURSABLE                      issued, and the payment will be made in a
EXPENSES                          period of 30 (thirty) days as of the day of
                                  its submittal.
- - --------------------------------------------------------------------------------

7.4.1.1 The payments due because of this CONTRACT, referring to the services,
        will always occur on the 30th day after the end of the measured period,
        included in the MB's, or on the

                                       28

        first subsequent working day, provided the CONTRACTOR fulfills the time
        limits for the submittal of the Collection Documents set forth herein.
        In the event of non-compliance, by the CONTRACTOR, with said submittal
        time limits, the payments will be postponed for the number of days
        equal to the delay in the delivery of such documents..................

7.5.    Measurement follow-up.................................................

7.5.1.  The CONTRACTOR undertakes to follow-up the measurements and the
        determinations carried out by PETROBRAS, offering, at that time, the
        impugnations or considerations it deems necessary, which will be
        submitted to PETROBRAS appraisal and decision........................

7.5.2   The CONTRACTOR's signature by its representative before PETROBRAS will
        imply in the acknowledgement of the accuracy of the Measurement Bulletin
        (MB) and/or Readjustment Bulletin (RB) for all legal purposes.........

(End of Clause)...............................................................


                                       29

EIGHTH CLAUSE - FORM AND PLACE OF PAYMENT

8.1.    The monthly payments due as a result of this CONTRACT will be made by
        PETROBRAS to the CONTRACTOR, in Brazilian currency, 30 (thirty)
        consecutive days, as of the last day of the period of performance of the
        services, provided the CONTRACTOR submits the collection documents until
        the 8th (eighth)working day after the last day of the period of
        performance of the services...........................................

8.1.1.  The payment of an eventual difference in readjustment will be made on
        the same day in which the payment of the respective service occurs,
        provided the CONTRACTOR submits the corresponding collection document up
        to the 5th (fifty) working day after the indexes that permit the issuing
        of the Readjustment Bulletin (RB) are known...........................

8.1.2.  The payment of reimbursable expenses, if any, will be made 30 (thirty)
        consecutive days after the submittal of the collection document.......

8.1.3.  In the event of non-submittal of the collection documents in the time
        limits set above, the payment will be postponed for as many consecutive
        days as those corresponding to the delay in the delivery of the
        collection documents..................................................

8.2.    The collection documents will be submitted, together with the original
        of the document giving rise to them (MB, RB, RD) in the Docket of the
        Financial Department indicated by PETROBRAS, for the purposes of
        checking the fulfillment of the time limits for their payment.........

8.3.    The collection documents will be issued without erasures, complying with
        the pertinent laws in force, and will contain obligatorily the following
        information: .........................................................

        a) Place and date of its emission and number of the collection
           document;..........................................................

        b) Number and date of signature of the contract deed;.................

        c) Number and date of the documents originating them (MB, RB, RD);....


                                       30

        d) Gross value of the collection documents, both in numbers and in
           writing;...........................................................

        e) Name and code of the banking establishment, branch and the respective
           code, and number of the current account of the payee, where the
           payments will be made;.............................................

        f) In order that a particular payment is made in a banking establishment
           different from the one indicated at the time the contract deed was
           signed, such amendment will obligatorily be preceded by a
           fax/correspondence from the CONTRACTOR or will appear in the payee's
           collection document................................................

8.3.1.  In the event the collection document is inaccurate, it will be returned
        to the CONTRACTOR and the time limit foreseen in item 8.1 will be
        postponed for as many days as those corresponding to the delay in the
        submittal of such document............................................

8.3.2.  In the event of re-submittal of the collection document, as a result of
        a previous impugnation, this fact should appear in the history of the
        collection document...................................................

8.3.3.  The CONTRACTOR will obligatorily submit, every month to the Manager of
        the CONTRACT:.........................................................

        a) Payroll of the CONTRACTOR's employees who are involved in the
           rendering of the services contracted;..............................

        b) A photocopy of the Social Security Payment Slip (GRPS), duly settled
           and authenticated, obligatorily filling out field "8" (other
           information), the name, CGC of PETROBRAS, number, date and amount of
           the Invoice or Bill of Sale referring to the services rendered in the
           month..............................................................


                                       31

        c) In case of a Cooperative, to submit the payment vouchers of the
           amount s paid, distributed or credited to its members as a
           remuneration for the services rendered in the fulfillment of this
           contract..........................................................

8.3.4.  The collection documents will not be accepted by PETROBRAS if submitted
        with Income Tax at Source already withheld...........................

8.3.5.  It is the responsibility of PETROBRAS' disbursing office the explanation
        of doubts regarding the issuing of the collection documents..........

8.3.6.  Eventual payments made for more or for less by PETROBRAS, will be
        compensated as soon as they are detected, and the respective amounts
        will be duly corrected...............................................

8.3.7.  The CONTRACTOR should indicate the place and fax number, if any, for the
        receipt of the "Notice of Payment Foreseen"..........................

8.4.    The vouchers for the reimbursable expenses due to the CONTRACTOR as a
        result of this contract deed, will be previously submitted to the
        Manager of the CONTRACT, for checking, besides being duly settled by the
        respective supplier or service rendered, when such is the case........

8.4.1.  If the original cannot remain in PETROBRAS' hands, copies thereof may be
        submitted, which will be checked by the Inspector and/or Manager, and
        the following should appear in every original document: "COPY SUBMITTED
        FOR REIMBURSEMENT ON .../.../..." followed by the signature and
        identification by name, position and registry number, and the originals
        will be returned to the CONTRACTOR. The following text will appear in
        the copies of each document in PETROBRAS' hands: "CHECKED WITH THE
        ORIGINAL ON .../.../...", which the Inspector and/or Manager will sign,
        identifying the signature by name, position, and registry number.


                                       32

8.4.2   In special cases of reimbursement of import costs (duties and/or
        expenses), the CONTRACTOR will send a letter submitting the vouchers for
        such expenses, together with the import proceeding, to the office
        responsible for its follow-up.........................................

8.4.3.  The receipt, duly formalized by PETROBRAS, of any reimbursable expense
        voucher, does not represent the recognition of the debt, nor the proof
        that the expenses was made............................................

8.4.4.  The collection of reimbursable expenses can only be made through. the
        issuing of a Services Invoice, after approval by PETROBRAS of the
        respective Reimbursement Document RD, which will be issued up to 5
        (five) working days, as of the date of submittal of said documents....

8.4.4.1. PETROBRAS' Inspection has 3 (three) working days to proceed with the
        checking of the expense voucher and to notify its approval to the
        CONTRACTOR, so that it may issue the Combined Invoice and Bill of Sale.

8.4.5.  The total amount of the collection document will be obtained by applying
        the following formula:................................................

         VTD
VTR =   ----- , where:
        I-ICP

VTR = total amount to be reimbursed to the CONTRACTOR;........................

VTD = total amount of the reimbursable expenses, effectively authorized; .....

ICP = total of the sum of the  aliquots  of taxes  collected,  in the  decimal
      form (ISS or ICMS, as the case may be, COFFINS and PIS/PASEP)...........

(End of Clause)...............................................................


                                       33

NINTH CLAUSE - FINES..........................................................

9.1.    Noncompliance, by the CONTRACTOR, after ninety-one days beyond the time
        limit mentioned in item 2.3 of this CONTRACT have elapsed, will imply in
        the imposition of fine against the CONTRACTOR, in a written notice,
        corresponding to 30% (thirty per cent) of the rate foreseen in REF 101
        of ATTACHMENT III, per day of delay..................................

9.2.    In the event of noncompliance, by the CONTRACTOR, with the inspection's
        requirements within the time limit it may set, PETROBRAS may, by a
        written notice, impose against the CONTRACTOR, per day of noncompliance
        with such requirements, as of the end of the time limit set, a fine
        corresponding to 20% (twenty per cent) of the rate provided for in REF
        101 of ATTACHMENT III.................................................

9.3.    The penalties set forth in this Clause do not exclude any other provided
        for in the Laws in force and/or in this CONTRACT......................

9.4.    The amount corresponding to the sum of the basic values of the fines
        imposed is limited damages to 10% (ten per cent) of the estimated total
        value of the present CONTRACT.........................................

9.5.    The basic values of the fines will be readjusted by the readjustment
        factor calculated by the formula shown in subitem 6.2.1 of this CONTRACT
        and in force in the period of its imposition..........................

9.5.1.  The fines will be forwarded by the Inspection, for discount by the
        Disbursing Office, as soon as the pertinent definitive readjustment
        factors are known.....................................................

9.5.2.  In the event of balance, PETROBRAS reserves itself the right to make or
        complement the deduction in collection document(s) related to any other
        contract deed eventually entered into with the CONTRACTOR, or to use any
        other adequate means to settle the debt, if necessary.................


                                       34

9.6.    In a written notice and without prejudice of the capacity to rescind
        the CONTRACT, PETROBRAS may impose upon the CONTRACTOR a compensatory
        fine of 100% (one hundred per cent) of the amount of the conviction,
        due to default of its labor, social security or tax obligations.

9.6.1   The payment of said fine will not exempt the CONTRACTOR from the
        obligation to reimburse PETROBRAS for the amount imposed upon it as a
        result of an eventual joint conviction passed by a Labor Court or by the
        proper administrative jurisdictions..................................

9.6.2   The CONTRACTOR will be fined in the percentual of 5% (five percent) on
        the amount of the invoice in the event it does not submit the GRPS or
        submits it at variance................................................

9.6.2.1. The GRPS is considered at variance if it does not have proof of
        payment of social security contributions of all of the CONTRACTOR's
        Brazilian crew working in the fulfillment of the CONTRACT.............

9.7.    The CONTRACTOR may appeal against the imposition of the fine, in a
        declaration, within the non-deferrable time limit of 15 (fifteen)
        consecutive days as of the date the notice is received................

(End of Clause)...............................................................


                                       35

TENTH CLAUSE - INSPECTION.....................................................

10.1.   The inspection of the services contracted herein will be carried out by
        PETROBRAS' representatives, and the CONTRACTOR undertakes to allow
        their free access to the UNIT and to the service locations and to
        comply immediately with the observations of such inspection, which will
        have ample powers to:.................................................

10.1.1. Determine the interruption of the evaluation and/or completion of the
        well, for the purpose of carrying out formation testing, corings,
        electric loggings and other services deemed necessary;................

10.1.2. Determine, provided it comes to its knowledge and is within its
        capacity, the suspension of the services which perhaps are being carried
        out in disagreement with the good technique or which threaten the safety
        of persons or assets of PETROBRAS, third parties and of the CONTRACTOR
        itself, complying with subitem 2.1.7 of ATTACHMENT I..................

10.1.3. Refuse the use of improper or inadequate techniques, as well as the
        operations that do not comply with the established programs.

10.1.4  Refuse the employment of condemned or improper materials, tools and
        production string components, which do not comply with PETROBRAS' and
        API's standards.......................................................

10.1.5. Order the withdrawal, from the work site, of any of the CONTRACTOR's
        employees who, in PETROBRAS' opinion, may endanger the good performance
        of the services or hinder its inspecting activities ..................

10.1.6. Certify on the accuracy of the information reported daily by the
        CONTRACTOR............................................................

10.1.7. Notify the CONTRACTOR, in writing, on the imposition of the fines
        provided for in this CONTRACT, including those referring to the
        CONTRACTOR's action or omission.......................................

10.1.8. Request from the CONTRACTOR a detailed report on any accident occurred
        and on any operation or repair performed..............................


                                       36

10.1.9. Request from the CONTRACTOR the documentation regarding the proof of
        payment of its labor obligations, including social security
        contributions (Negative Debt Certificate) and deposits in the FGTS, for
        the crew members......................................................

10.2.   Recordings-PETROBRAS' Inspection should record its observations on the
        Driller's Log approved by the IADC and on the Daily Drilling Certificate
        (ADP), to safeguard the rights and liabilities foreseen in this
        CONTRACT..............................................................

10.3. During the period of validity of the CONTRACT, PETROBRAS will carry out
evaluation of the CONTRACTOR's performance, covering the groups in equipment and
material, human resources, installations, quality and efficiency. The results of
the performance evaluations will be notified and consolidated by means of
service performance certificates.........

(End of Clause)...............................................................


                                       37

ELEVENTH CLAUSE - RECISION....................................................

11.1    PETROBRAS may rescind the present CONTRACT, without the CONTRACTOR being
        entitled to any right to indemnity and/or withholding in the following
        cases:................................................................

11.1.1. Nonfulfillment, or irregular fulfillment of contract clauses,
        specifications, operations or time limits, as well as the repeated
        perpetration of faults in the fulfillment of the CONTRACT;............

11.1.2. Total or partial subcontracting of the object of the present CONTRACT,
        the association of the CONTRACTOR will another, merger/ division or
        total or partial incorporation, except if allowed for in this CONTRACT,
        which affects the good fulfillment of this instrument.................

11.1.3. Interruption of the services for more than 60 (sixty) days, without
        good cause and previous notice to PETROBRAS;..........................

11.1.4. Decree of the CONTRACTOR's bankruptcy.................................

11.1.5. Suspension of the services for more than 60 (sixty) days .............

11.1.6. When the limit for the imposition of penalties provided for in item 9.4
        of this CONTRACT is attained........................................

11.1.7. Slowness in the performance of the works, leading PETROBRAS to prove the
        impossibility of completing the services within the established time
        limits................................................................

11.1.8. Noncompliance with the determinations of PETROBRAS' agent appointed to
        follow-up and inspect the fulfillment of the CONTRACT, as well as those
        of his superiors......................................................

11.1.9. The dissolution of the CONTRACTOR.....................................

11.1.10 The social change or the modification of the company's purpose or
        structure, which in PETROBRAS' opinion, hinders, the performance of the
        services;.............................................................

11.1.11 Delay in the beginning of the fulfillment of the CONTRACT for more
        than 180 (one hundred and eighty) days................................


                                       38

11.1.12 Rescision of the CHARTERING CONTRACT of the UNIT entered into between
        PETROBRAS and the INTERVENIENT PARTY..................................

11.1.13. If the limit set forth in subitem 2.1.9 of ATTACHMENT II to this
        CONTRACT is attained..................................................

11.1.14. If the limits set forth in NOTE 2 of REF 102 of ATTACHMENT II to this
        CONTRACT is attained..................................................

11.1.15. Non-submittal of the proof of fulfillment of labor obligations towards
        the employees directly involved in the services object of this CONTRACT,
        including social security contributions and deposits in the FGTS, when
        requested by the Inspection, or if such default is proved.............

11.1.16. Non-submittal or submittal at variance of the GRPS, when the
        corresponding invoice is delivered....................................

11.1.16.1. The rescision for this reason does not prevent PETROBRAS from
        imposing the respective fine, foreseen in 8.7.2;......................

11.2.   In the event of rescision of the contract deed for the reasons foreseen
        in 10.1, PETROBRAS:

        a) will take over the object of the contract deed, on the stage and
           location where it is found;........................................

        b) will enforce the contract guarantee, if any, for the reimbursement of
        the amounts of fines and indemnities due to it;.......................

        c) will withhold the credits arising from the contract deed, up to the
        limits of the damages caused to it;...................................

11.3.   After the CONTRACT is rescinded, as set forth in this Clause, the
        CONTRACTOR is liable, in legal and contract fashion, for the violation
        or inadequate performance which gives rise to


                                       39

        the rescision, as well as f or the reimbursement of damages which
        PETROBRAS may come to sustain.........................................

11.4.   After the CONTRACT is rescinded, PETROBRAS, at its exclusive judgment,
        may adjudicate the operations object thereof to whom it deems
        appropriate, without behoving the CONTRACTOR any consultation or
        interference, claim and/or indemnity, for whatever title, and the
        CONTRACTOR will be liable to legal and contract penalties, besides
        answering for damages PETROBRAS may sustain...........................

11.4.1. The CONTRACTOR is also liable for the pertinent administrative
        sanctions, its full defense being guaranteed..........................

11.5    In the event PETROBRAS does not impose the right to rescind the present
        CONTRACT according to this Clause, it may, at its absolute discretion,
        withhold the payments of pending invoices, until the CONTRACTOR fulfills
        the contract condition it has infringed, but such fact will not
        represent novation nor will it generate rights that may be claimed by
        the CONTRACTOR........................................................

(End of Clause)...............................................................


                                       40

TWELFTH CLAUSE - FISCAL CHARGES...............................................

12.1.   Taxes (taxes, fees, emoluments, fiscal and parafiscal contributions)
        that are due as a direct or indirect result of the present CONTRACT,
        or of its fulfillment, will be the exclusive responsibility of the
        taxpayer, so defined in the tax rule, with no right to reimbursement.
        PETROBRAS, as the disbursing source, will discount and withhold within
        the legal time period, from the payments it makes, the taxes it is
        liable to by the laws in force........................................

12.1.1. The CONTRACTOR states that, in quoting its prices, it has taken into
        account the taxes (taxes, fees, emoluments, fiscal and parafiscal
        contributions) charged on the fulfillment of this CONTRACT, and it
        cannot make any claim due to error on such evaluation, for the purpose
        of requesting a price revision or reimbursement of payments set down by
        the proper authority..................................................

12.1.2. once found, during the period of validity of the CONTRACT, that the
        CONTRACTOR has unduly added to its prices amounts corresponding to
        taxes, fiscal and/or parafiscal contributors and emoluments of any kind
        that are not charged to the performance of the services agreed upon,
        such values will be immediately excluded, with the consequence reduction
        of the prices practiced and reimbursement of 'amounts that may have been
        paid to the CONTRACTOR...............................................

12.2.   If, during the period of validity of this CONTRACT, any of the following
        events occur: creation of new taxes; extinction of existing taxes;
        changes in the aliquots; establishment of tax incentives of any kind;
        and exemption or abatement of federal, state or county taxes; which,
        provedly come to increase or reduce the burdens of the parties to the
        contract, the prices will be revised, so as to fit them into the changes
        made, compensating, at the first opportunity, any differences arising
        from such changes. However, if it is a question of tax incentives, the
        advantages arising therefrom will always be for PETROBRAS.............


                                       41

(End of Clause)...............................................................


                                       42

THIRTEENTH CLAUSE - FORCE MAJEURE.............................................

13.1    PETROBRAS and the CONTRACTOR will not be liable for the nonfulfillment
        of their respective obligations in case of events that characterize an
        act of God or force majeure defined in the sole paragraph of Article
        1.058 of the Brazilian Civil Code. Any suspension of performance due to
        this item will be limited to the period during which such cause or its
        consequences exist, and such period will be added to the duration of the
        CONTRACT mentioned in the Second Clause of the present CONTRACT.
        However, the CONTRACTOR is assured the right to receive the rate
        provided for in REF 104 of ATTACHMENT III, with the exception of the
        exemption from payment set forth in subitem 2.1.4 of the ATTACHMENT II,
        and the reimbursements mentioned in this CONTRACT, and furthermore, the
        parties will severally assume their losses............................

13.2.   If the circumstance that justify the invoking of the existence of an act
        of God or force majeure occurs, the party unable to fulfill its
        obligations will immediately notify the other party, in writing, on the
        occurrence and its consequences.......................................

13.3.   If the impediment arising from the force majeure lasts for more than
        90 (ninety) consecutive days, any of the parties may opt for the
        termination of the CONTRACT, with both parties complying with their
        mutual obligations due until the date of the beginning of said
        impediment............................................................

(End of Clause)...............................................................


                                       43

FOURTEENTH CLAUSE - ASSIGNMENT AND TRANSFER...................................

14.1.   The CONTRACTOR cannot assign or transfer, in whole or in part, the
        present CONTRACT, except with PETROBRAS' prior authorization in writing.

14.2.   The CONTRACTOR cannot assign or give in guarantee, at any title, in
        whole or in part, the credits of any kind, arising or deriving from the
        present CONTRACT, except with PETROBRAS' prior authorization in writing.
        The prior authorization will obligatorily state that PETROBRAS imposes
        upon the assignee of the credits the exceptions that behooves it,
        mentioning expressly that the payments to the assignee will be
        conditioned to the fulfillment, by the assignor, of all of its contract
        obligations....................................................

14.3.   The occurrence of the above mentioned events, duly authorized by
        PETROBRAS, does not exempt the CONTRACTOR from any of its contract
        obligations...........................................................

14.4.   PETROBRAS may assign or transfer, in whole or in part, the present
        CONTRACT, under commercial conditions to be agreed upon by the parties.

(End of Clause)...............................................................


                                       44

FIFTEENTH CLAUSE - CONTRACT RELATIONSHIPS.....................................

15.1.   This CONTRACT is related to another one for chartering the UNIT, signed
        on this same date between PETROBRAS and MARITIMA NAVEGACAO E ENGENHARIA
        LTDA.

(End of Clause)...............................................................


                                       45

SIXTEENTH CLAUSE - INTERVENIENCE..............................................

16.1. Clause non-applicable in this Contract...................................

(End of Clause)...............................................................


                                       46

SEVENTEENTH CLAUSE - ACCEPTANCE...............................................

17.1.   After the services are completed in strict compliance with the
        conditions set forth in the present deed, PETROBRAS will accept them
        by means of a DEFINITIVE ACCEPTANCE DEED signed by the parties........

17.1.1. Before the signature of the DEFINITIVE ACCEPTANCE DEED, the CONTRACTOR
        will comply with all of the Inspection's requirements regarding claims,
        without any charge to PETROBRAS.......................................

17.1.2. The signature of the DEFINITIVE ACCEPTANCE DEED does not exempt the
        CONTRACTOR from the liabilities provided for in this CONTRACT and in the
        laws in force.........................................................

(End of Clause)...............................................................


                                       47

EIGHTEENTH - CLAUSE LIABILITY.................................................

18.1.   PETROBRAS' and the CONTRACTOR'S liability f or damages will be limited
        to the direct damages in accordance with the Brazilian Civil Code and
        pertinent laws, with exception of loss of profit and indirect damages,
        the indirect damages being limited to 100% (one hundred percent) of the
        total contract value..................................................

(End of Clause)...............................................................


                                       48

NINETEENTH CLAUSE - COMPLEMENTARY DOCUMENTS...................................

19.1.   The ATTACHMENTS mentioned below are an integral part of the present
        CONTRACT and, in the event of disagreement between the Attachments and
        the CONTRACT, the text of the CONTRACT will prevail...................

                                  ATTACHMENTS

I    - Technical specifications of the UNIT...................................

II   - Applicability of the Rates and Incidents in the Performance............

III  - Unit Prices Spreadsheet................................................

IV   - Responsibilities in the Performance and Mutual Obligations.............

V    - List of Specialized Personnel;.........................................

VI   - Environment Operating Conditions.......................................

VII  - PETROBRAS' Safety Rules................................................

VIII - Radio Communication and Radio Beacon Frequency Plan....................

IX   - Equipment Testing Program..............................................

X    - Procedures in the Event of Fatal Accidents.............................

(End of Clause)...............................................................


                                       49

TWENTIETH CLAUSE - JURISDICTION...............................................

20.1.   The Jurisdiction of the County of the Capital of the State of Rio de
        Janeiro will be competent to settle any questions arising from the
        present CONTRACT, with the express waiver, by the parties, of any other,
        however privileged ..............................................

        AND BEING THUS AGREED, the parties sign the present deed in 3 (three)
        copies with the same tenor, with the witnesses below..................

Rio de Janeiro, (blank).......................................................

PETROLEO BRASILEIRO S.A.-PETROBRAS............................................

(SIGNED:) LUIZ EDUARDO G. CARNEIRO............................................

LUIZ EDUARDO G. CARNEIRO-EXECUTIVE SUPERINTENDENT OF EXPLORATION AND PRODUCTION
SOUTH - SOUTHEAST.............................................................

MARITIMA NAVEGACAO E ENGENHARIA LTDA..........................................

(SIGNED:) GERMAN EFROMOVICH...................................................

GERMAN EFROMOVICH - PRESIDENT

WITNESSES:

(SIGNED:) ANDRE MESQUITA PINTO................................................

CPF No. 299.579.427-49

(SIGNED:) ROBERTA LOMENHA DA COSTA............................................

CPF No. 034.053.477-00........................................................



                                       50

CONTRACT 101.2.101.97-0.......................................................

                               SERVICES RENDERING

                                  ATTACHMENT II

                 APPLICABILITY OF THE RATES AND INCIDENTS IN
                                THE PERFORMANCE.

1 - APPLICABILITY OF THE RATES - DEFINITION OF THE SERVICE RATES PER 24

(TWENTY-FOUR) HOUR DAY........................................................

REF 101 - OPERATION RATE - It will be applied during the activities  requiring
the use of the UNIT, such as electric logging,  formation testing,  completion
and  workover  operations,  including  drilling  lines  scouring  and  cutting
operations....................................................................

REF 102 - REPAIR RATE - In the periods  when there is an  interruption  of the
activities  that  require  the use of the UNIT,  mentioned  in Ref 101 of this
ATTACHMENT and the operations for Moving the UNIT between  locations,  Ref 105
of this  ATTACHMENT,  due to  maintenance,  including  replacement of mud pump
spare parts,  and/or repair in the UNIT's equipment,  or in those which supply
is the CONTRACTOR' s, responsibility, no rate will be due.....................

Note 1. The repair  period will be considered  as of the  interruption  of the
        operation  that  is  being  performed,  until  the  return  to the  same
        situation when the  interruption  occurred,  except for the periods when
        the  interruption  in the repair  activities  occur due to  adverse  sea
        conditions, as set forth in NOTE 2 of Ref. 104........................

Note 2. In the event the CONTRACTOR remains in Repair Rate for an accumulated
        total of 30% (thirty percent) of the time, for any period of 6 (six)
        contract months, PETROBRAS may rescind the present CONTRACT, based on
        subitem 10.1.14 of this CONTRACT.....................................


                                       51

Note 3. It will be considered as repairs the occurrences due to wash outs in
        the drill pipes and in the other elements of the drill string,
        belonging the CONTRACTOR, with exception of those arising from the
        presence of H2S and from abnormal mechanical conditions occurred in the
        well.

Note 4. At the Inspections discretion, for the maintenance of the BOP, the
        CONTRACTOR may be granted a franchise of up to 24 (twenty-four) hours
        between the instant the BOP is set of the test stump, until its
        operational withdrawal, and the moment of its movement for the next
        lowering in another well, without the CONTRACTOR entering into the
        repair rate, provided such maintenance is carried out according to
        international standards. In the period within these 24 (twenty-four)
        hours intended exclusively for the BOP maintenance, the waiting rate
        (Ref. 104) will be due...............................................

REF. 103 - RATE ADDITIONAL (RA) - The CONTRACTOR will be entitled to the receipt
of a Rate Additional ........................................................

REF. 104 - WAITING RATE (TE) - corresponds to 95% (ninety-five percent) of the
operation rate (TO) and which will be applied in BAD WEATHER, FORCE MAJEURE and
WAITING situations, as defined below:

1)   BAD WEATHER SITUATIONS - in the event of stoppage of the operations when
     environmental conditions are so severe as to endanger the UNIT's operating
     capacity, the limitations in ATTACHMENT VI, being complied with, making the
     operations unstable or unsafe or preventing support vessels to have access
     to the UNIT, or preventing the tugs' operations, at the time of change of
     locations, although the UNIT may operate normally, in spite of the bad
     weather..................................................................

2)   FORCE MAJEURE SITUATIONS - during the period when the UNIT cannot operate,
     due to act of God or force majeure, as defined in the THIRTEENTH CLAUSE of
     the


                                       52

     CONTRACT, until the removal of the impediment or the rescision of the
     CONTRACT, as the case may be.

3)   WAITING - waiting for the arrival, maintenance or availability of
     materials from PETROBRAS or third parties, under PETROBRAS' responsibility,
     even if the maintenance is made in the UNIT; waiting for daylight to carry
     out formation tests; waiting for orders from PETROBRAS, such as, but not
     limited to: change of programs, definition to proceed with the completion
     or other production activity, rest for PETROBRAS' team or of those of third
     party at PETROBRAS' service; waiting for towage or support vessels.......

NOTE 1. The  period  spent  in  disconnecting  the  LMRP  from the BOP due to
        environment  conditions,  will be considered  as BAD WEATHER  situation,
        until the return to the previous situation............................

NOTE 2. If a BAD WEATHER situation occurs which interrupts a repair activity,
        the Waiting Rate (Ref 104) with a 25% (twenty-five percent) reduction,
        will be due during that period........................................

REF.  105 - MOVING  RATE -  corresponds  to 95%  (ninety-five  percent) of the
      Operation Rate (TO) and will be applied during the following periods:

        a) Beginning of the CONTRACT-After the acceptance of the UNIT's
           equipment operating conditions, once the general testing provided for
           in ITEM 3. 1. of the CONTRACT has been carried out, until the spud in
           of the first well or reentry in a new well (beginning of the running
           of the first tool for access to the well):.........................

        b) Between locations-After the end of the drilling operations,
           completion or intervention in a well, with the arrival of the BOP or
           tool used in the well (the one which occurs last) in the moon pool,
           until the spud in or reentry in a new well (beginning of running the
           first tool for access to the well).................................


                                       53

NOTE: In this period are included the DP system calibration and tests,  always
      in each new  location,  and in  others in each  contract  year or at any
      time, when requested by PETROBRAS.......................................

        c) End of the Contract-After the end of the spud in or intervention
           operations in the last well, with the arrival of the BOP or tool used
           in the well (the one which occurs last) in the moon pool, until the
           UNIT's arrival in a sheltered waters location, chosen in common
           agreement between the parties, or, if there is PETROBRAS' equipment
           still aboard, until the withdrawal of such equipment from the
           UNIT...........................................................

2 - INCIDENTS IN THE PERFORMANCE..............................................

2.1.    EXEMPTION FROM PAYMENT - PETROBRAS will be exempted from the payment of
        the rates foreseen in this ATTACHMENT, during the period in which
        occurs:...............................................................

2.1.1.  Interruption of the services due to the CONTRACTOR's duly proven fault
        arising from operational error and/or lack of material or equipment,
        inclusive due to the loss of equipment or subaquatic spare parts......

2.1.2.  Stoppage of the services and/or of the UNIT due to measures related to
        impositions by made the insurers......................................

2.1.3.  CONTRACTOR's refusal to operate under the conditions foreseen in
        ATTACHMENT VI-Environmental Operation Conditions......................

2.1.4.  Stoppage of the services and/or of the UNIT for inspection or dockage
        purposes, including surveys and dockages arising from act of God or
        force majeure, as defined in the THIRTEENTH CLAUSE of the CONTRACT, the
        corresponding expenses also running for the CONTRACTOR's account......

NOTE  1. The exemption from payment will begin in the moment there is an
         interruption of the operational continuity object of this CONTRACT,
         even if the withdrawal of all or part of


                                       54

        PETROBRAS' and/or the CONTRACTOR's cargo becomes necessary for the
        inspection and/or dockage.............................................

NOTE 2. The end of the exemption from payment,  due to the  inspection  and/or
        dockage, will occur:

        a) On the return to the same location, the moment the operations returns
           to the previous situation;.........................................

        b) In the mobilization for another location, the moment the UNIT starts
           sailing after PETROBRAS' and/or the CONTRACTOR's materials have been
           put back on board..................................................

2.1.5.  Occurrence of kick, drill string sticking, loss of circulation, fishing
        or abandonment, caused by the CONTRACTOR's duly proven action or
        omission, from the moment the problem was ascertained, until the return
        to the situation prior to its occurrence, or displacement to another
        location, in the event of abandonment.................................

2.1.5.1.The exemption from payment referred to in 2.1.5 will be limited to a
        period of 15 (fifteen) days, per event, after which the reduction
        foreseen in subitem 2.2.3 of this ATTACHMENT will be applied..........

2.1.6.  Occurrence of blow out caused by the CONTRACTOR's duly proven action or
        omission, from the moment the problem was ascertained, until the return
        to the situation prior to its occurrence..............................

2.1.6.1. The exemption from payment referred to in item 2.1.6 will be limited to
        a period of 45 (forty-five) days, after which the reduction foreseen in
        subitem 2.2.4 of this ATTACHMENT will be
        applied.................................................................

2.1.7.  Suspension of the services, determined by PETROBRAS' Inspection, based
        on item 10.1.1 of the CONTRACT........................................

2.1.8.  Interruption of the operations due to a failure occurred in any of the
        UNIT's equipment, at the time of the testing to be carried out according
        to item 3.1 of the CONTRACT...........................................


                                       55

2.1.9.  In the occurrence of events of exemption from payment provided for in
        subitems 2.1.1, 2.1.2, 2.1.3, and 2.1.7, for a total accumulated period
        exceeding 30% (thirty percent) in any 6 (six) month period, PETROBRAS
        may rescind the present CONTRACT, based on its subitem
        11.1.13...............................................................

2.2.    REDUCTION IN THE DAILY OPERATION, WAITING AND MOVEMENT RATE...........

The rates foreseen in this ATTACHMENT will be reduced in the following cases:.

2.2.1.  Total or partial inoperativeness or malfunction of any equipment which
        delays or hinders the operations, such as, but not limited to, winches,
        kelly spinner, geolograph, current meter, air compressors, shale shaker,
        mixing pumps, mud laboratory equipment and bulk receipt and transfer
        systems, are reason for the reduction of the daily rate provided for in
        Ref 101, in 1% (one percent), cumulative per equipment, provided the
        CONTRACTOR is notified in writing in the Daily Drilling Certificate
        (ADP), by PETROBRAS' Inspection and which, after the time limit the
        latter has set to repair said equipment, such repair has not been
        made...............................................................

2.2.2.  Low Efficiency-REFERENCE RATES 101 and 105 of this ATTACHMENT will
        suffer a 20% (twenty percent) reduction, in the event low efficiency is
        verified, according to the operating efficiency parameters listed below.
        Such reduction will be applied during the whole corresponding activity
        period, which low efficiency is verified:

Operating Parameters:.........................................................

- - - Maneuver of the drill string in a cased well (except BHA):..................

      o Inside the riser and 20" casing = 500 m/h............................

      o Inside the 13 3/8" casing = 600 m/h..................................

         o   Inside of 9 5/8" casing = 700 m/h................................


                                       56

- - - Break of DP's per unit = 25jt/h.............................................

- - - Casing  string  run in the  sea/inside  the  riser/previous  casing  (joints
      approximately 12 m long)................................................

      o     30" Casing -                  2 jt/h..............................

      o     20" Casing -                  5  jt/h.............................

      o     13 3/8" Casing -              13 jt/h.............................

      o     9 5/8" Casing -               18 jt/h.............................

      o     7" Casing -                   15 jt/h.............................

- - - Running of drilling riser,  excluding normal time for testing (50 ft joint):
      45/m/h .................................................................

- - - Pulling of drilling riser (50 ft joints): 60 m/h............................

- - - Installation or pulling of the kill/choke lines/ telescopic joint/stretchers:
      6.0h..................................................

 - Diverter installation or pulling: 2.0h.....................................

 - Assembly of the dampening lines in the M.R.: 1.5h..........................

 - Assembly  of the  flexitube  equipment:  5.Oh..............................

 - Assembly  of the  production tail: 2.0h....................................

 - Tubing running or pulling, per unit-150 m/h................................

 - Tubing running or pulling per section-300 m/h..............................

 - Completion risers running or pulling-50 m/h................................

 - Assembly of terminal head and slings-2.0 h.................................

 - Moving of ANM to/from the moon pool-3.0 h..................................

 - Moving of tree cap or tree running tool to/from the moon pool-2.5h ........

 - Assembly of lubricator and wire line BOP-1.5h..............................

NOTE: The above  mentioned  operating  parameters  are based on normal weather
      conditions..............................................................

2.2.3.  Beginning on the 16th (sixteenth day), inclusive, of the occurrence, of
        kick, drill string sticking, loss of circulation or fishing, caused by
        the CONTRACTOR's duly proven action or


                                       57

        omission until the return to the situation prior to its occurrence, the
        applicable rate will be reduced by 50%(fifty percent).................

2.2.4.  Beginning on the 46th (forty-sixth) day, inclusive, of the occurrence of
        Blow-out caused by the CONTRACTOR's duly proven action or omission,
        until the return to the situation prior to its occurrence the applicable
        rate will be reduced by 50% (fifty percent)...........................

2.3.    Period of Validity of the CONTRACT Rates-the contract rates set forth in
        this ATTACHMENT will apply in the period set forth below:

        a) Beginning: release of the UNIT, by PETROBRAS, to sail to the first
           location, after the equipment general testing provided for in item
           3.1 of the CONTRACT has been carried out, with the exception of the
           provision in its subitem 3.1.1.1.................

        b) End: after the end of the drilling or completion of the last well,
           with the UNIT's arrival at a port or sheltered waters chosen by
           common agreement between the parties, and if there is PETROBRAS'
           equipment still aboard, with the withdrawal of such equipment from
           the UNIT...........................................

2.4.    Blow-Out - PETROBRAS will be responsible for the well control operation
        costs, in the event of blow-out and caving caused by the blow-out. Such
        provisions apply only to the well control costs and do not, apply to the
        loss of assets, lesions and/or damages caused by the blow-out, which are
        protected by the provisions of the pertinent items of this CONTRACT. The
        CONTRACTOR undertakes to place at PETROBRAS' disposal all of its
        resources in personnel and equipment related to this CONTRACT, without
        any additional charges to PETROBRAS. If the CONTRACTOR has contributed
        with duly proven action or omission for the occurrence of the accident,
        no rate will be due, until the solution of the problem, in compliance
        with the provisions in subitems 2.1.6 and 2.2.4 of this ATTACHMENT....


                                       58

(End of ATTACHMENT)...........................................................


                                       59

                    ATTACHMENT III - UNIT PRICES SPREADSHEET

                                SERVICE RENDERING

UNIT PRICES SPREAD SHEET

OBJECT OF BID:  SERVICES OF COMPLETION,  EVALUATION AND OF OIL AND GAS WELLS, BY
MEANS OF THE USE OF THE FLOATING UNIT PROVIDED WITH DYNAMIC POSITIONING SYSTEM.

PLACE OF OPERATION: BRAZILIAN CONTINENTAL SHELF AND INTERNATIONAL WATERS.

UNIT'S NAME: AMETHYST 5

COMPANY'S NAME: MARITIMA NAVEGACAO E ENGENHARIA LTDA.

CODE          ITEMIZATION                        UNIT   UNIT PRICE. (US$)

07.201.351    OPERATION RATE (REF. 101)           DAY    11,512.69

07.201.358    REPAIR RATE (REF. 102)              DAY    No rate will be due

07.201.362    WAIT.  BAD-WEATHER RATE             DAY    (95% OF REF. 101)

08.201.363    WAIT.-FORCE MAJEURE RATE(REF.104.2) DAY    (95% of Ref 101)

07.201.464    WAIT. RATE WAITING (REF.104.3)      DAY    (95% of Ref. 101)

07.201.366    MOVEMENT RATE (REF. 105)            DAY    (95% of Ref. 101)

09.252.008    MEALS (ITEM. 3.11. CONT. P.S.)     EACH   (MAXIMUM R$  20.00/meal)

                      SIGNATURES                        DATE OF THE. PROPOSAL

PETROBRAS                     CONTRACTOR                05/13/97
(illegible)                   German Efromovich


                                       60

                                SERVICE RENDERING

                                ATTACHMENT IV

                      RESPONSIBILITY IN THE PERFORMANCE AND
                               MUTUAL OBLIGATIONS

                   1 - RESPONSIBILITIES IN THE PERFORMANCE

1.  RESPONSIBILITIES IN THE PERFORMANCE.......................................

1.1.    The CONTRACTOR should provide, at its own expenses, pipe inspection
        according to API-RP 7 G Standard for drill string elements in use, at
        every 15,000m drilled. This inspection should be necessarily made by
        personnel accredited by PETROBRAS, and accompanied by PETROBRAS'
        Inspection which will attest the drill string conditions in accordance
        with the results of said inspection. The drill string elements rejected
        by the Inspection will be immediately repaired and/or replaced by the
        CONTRACTOR, which will assume the corresponding costs.................

1.1.1.  The CONTRACTOR should make provisions so that the same numbering of the
        parts is maintained for the period of validity of the CONTRACT........

1.1.2.  The reports on the inspections made on the drill string, riser column,
        and handling equipment will be submitted to PETROBRAS immediately after
        their performance.....................................................

1.1.3.  The CONTRACTOR should maintain a control of the elements of the string
        used in each well, recording at each maneuver, in the driller's log,
        which parts belong to the BHA in use, mentioning the inspection report
        numbering.............................................................

1.1.4.  The CONTRACTOR will provide, at its expenses, for the inspection of
        the drill string, when requested in writing by PETROBRAS, in the event
        of abnormal occurrences, such as wash-out or frequent string breaks...


                                       61

1.1.5.  The CONTRACTOR will provide, at its expenses, for the inspection
        according to API RP-8B standard, in each contract year, in all drill
        string and casing handling equipment, such as, but not limited to,
        slips, elevators, travelling tongs, hook, elevator arms, spiders,
        drilling winch, etc. This inspection should be necessarily accompanied
        by PETROBRAS' Inspection which will attest the drill string conditions
        in accordance with the results of said inspection. The equipment
        rejected by the Inspection will be immediately repaired and/or replaced
        by the CONTRACTOR.....................................................

NOTE:  The same  procedure  described  in 1.1.5  will be  applied to the riser
       column and to its handling tools, complying with standard API RP2K....

1.2.    Casing-The CONTRACTOR should measure and run the conductors and the
        casing strings in accordance with the drilling programs established by
        PETROBRAS.............................................................

1.2.1.  The CONTRACTOR will keep the casing pipes with their respective
        protectors............................................................

1.2.2.  The CONTRACTOR will exert its best efforts to remove all recoverable
        casing, when the well is abandoned....................................

1.3.    Cementing, Formation Testing and Electric Logs-the CONTRACTOR will
        provide facilities and give assistance to third parties, charged by
        PETROBRAS, for the performance of cementing, electric log, drill string
        testing, and other related services, complying with the programs and
        safety rules set down by PETROBRAS....................................

1.4.    Fishing-the CONTRACTOR should carry out all fishing operations that may
        become necessary......................................................

1.5.    Subsurface Pressures-the CONTRACTOR will exert its best efforts to
        control subsurface pressures, always maintaining all safety equipment,
        including, the ancillary ones, in good


                                       62

        operating conditions, so as to avoid contamination of the drilling fluid
        by hydrocarbons and fires resulting from blowouts.....................

1.6.    Well Completion and Abandonment-the CONTRACTOR will complete or abandon
        the wells in safety conditions, according to the programs set down by
        PETROBRAS.............................................................

1.7.    Drilling Reports-the CONTRACTOR undertakes to inform daily to PETROBRAS,
        until 01:00h of the following day, the progress of the operations,
        weather conditions, bulk and liquid stock consumption, and the status
        of the equipment that comprise the vessel's dynamic positioning system,
        and of others that the Inspection considers necessary, by means of
        bulletins, reports and records approved by the IADC and/or required by
        the Inspection........................................................

1.7.1.  The duration of the delays or wastes of time, their reasons, and other
        facts deemed important, will be recorded in detail in the Daily Drilling
        Data..................................................................

1.7.2.  Whenever PETROBRAS requests it, the CONTRACTOR will submit detailed
        reports on the progress of the operations carried out, or on any
        accident that may have occurred.......................................

1.8.    The CONTRACTOR undertakes to inform immediately to PETROBRAS' Inspection
        when the UNIT enters in a DEGRADED STATE..............................

1.8.1.  The following situations are considered DEGRADED STATE: (to be defined
        in common agreement between the parties)..............................

1.8.2.  In the event of non-fulfillment of Clause 1.8, and the UNIT comes to
        enter into yellow alert or red alert, a 20% (twenty percent) fine will
        be charged on the operation rate during the whole period in which the
        abnormality persists..................................................

1.9.    The CONTRACTOR undertakes to measure the sea current profiles (intensity
        and direction with reference to the true North) from the surface of the
        sea down to the sea bottom, carried out at 0600 and 1200 GMT (Greenwich
        Mean Time), and to deliver daily the data obtained to


                                       63

        PETROBRAS. Such profiles should obligatorily cover the following depths:
        20, 50, 150, 200, 250, 300, 350, 400m, and at every 100 (one hundred)
        meters thereafter, until the last depth investigated corresponds to 5
        (five) meters from the bottom of the sea...............................

1.9.1.  The data should be delivered to PETROBRAS' Inspector, in disk and in a
        format according to PETROBRAS' instructions...........................

1.10.   Maintenance and Conservation-the CONTRACTOR will be responsible for the
        maintenance, conservation and cleaning services of the UNIT and of all
        existing equipment and installations, maintaining all safety devices in
        perfect operating and adjustment conditions...........................

1.10.1. The CONTRACTOR undertakes to keep and maintain PETROBRAS's materials and
        equipment, aboard the UNIT, as well as all that are object of the
        loading and unloading operations in the support vessels...............

1.11.   Ancillary Services-in equal price, time limit and availability
        conditions, the CONTRACTOR should give preference to the ancillary
        services rendered by Brazilian companies, when they become necessary for
        the rendering of the services object of this CONTRACT.................

1.12.   Lubricants-to preferably use lubricants of the make PETROBRAS
        DISTRIBUIDORA-BR, submitting a justification in the event it uses
        another make..........................................................

1.13.   Wellhead inclination-the wellhead will not be installed with
        inclinations exceeding 1 1/2 degree (one and a half degree). If, by the
        Inspection's decision, the well continues to be drilled with an
        inclination exceeding that limit, the possible wear of the inner parts
        of the BOP, Lower Marine Riser, Adapt Riser and Spool, resulting
        therefrom, will be PETROBRAS' responsibility, provided the CONTRACTOR
        proves that said wear resulted from the operation in that well with
        wellhead inclination exceeding 2 degrees (two degrees)................


                                       64

1.14.   The CONTRACTOR should submit a description of its operating procedures
        for the events of disconnection, formation testing, and BOP and choke
        manifold testing......................................................

1.14.1. The procedures to be adopted will be discussed and approved by
        PETROBRAS.............................................................

1.15.   The Board Superintendents, Tool Pushers, and Drillers will be required
        to have proven technical competence in kick control, attested by a
        certificate of training in an entity recognized by PETROBRAS..........

1.16.   The CONTRACTOR should carry out well shutoff training exercises every
        week, on an occasion to be agreed upon with the Inspection, and
        according to the rules in force in PETROBRAS, which operation should be
        entered in the Driller's Log..........................................

1.16.1. The CONTRACTOR should submit a Safety Project for BOP, Choke Manifold
        and in well shutoff training test, which will be approved by PETROBRAS'
        Inspection............................................................

1.17.   Drill Riser-the CONTRACTOR will maintain the drill riser inner joints
        perfectly clean and free from debris and/or rust......................

1.17.1. The CONTRACTOR should perform the inner cleaning of all drill riser
        joints, using the proper tool and compressed air, whenever the operation
        following the riser string run is a completion and/or workover
        operation.............................................................


                                       65

                              2. MUTUAL OBLIGATIONS
- - --------------------------------------------------------------------------------
                 DESCRIPTION                   ON ACCOUNT OF     SUPPLIED BY
- - -----------------------------------------     ---------------   --------------
                                                PET     CONT     PET    CONT
                                              -------  ------   -----  -------
1. Cementing, logging, formation and/or
   production tests, directional drilling,
   perforating, wireline, nitrogen unit,
   flexitube, etc.                               X              X and

2. Welding services necessary for drilling,
   completion, well abandonment and
   maintenance operations.                                X               X

3. Technical supervision for manufacturing
   and control of drilling fluid, completion.    X                X

4. CONTRACTOR's land support base (office
   and storehouse).                                       X               X

5. Handling and storage of materials and
   equipment belonging to or supplied by the
   CONTRACTOR on land or in the UNIT.                     X               X

6. Handling and storage of materials and
   equipment of PETROBRAS or third parties,
   aboard the UNIT.                                       X               X

7. Land transportation, cargo loading and
   unloading of materials under the
   CONTRACTOR's responsibility.                           X               X

8. Fishing services.                                      X               X

9. Cleaning and painting services aboard the
   UNIT, including those of PETROBRAS'
   materials and equipment installed in
   the UNIT.                                              X               X

10.   Mess room, hostelry and meal supply
      services:

- - -  CONTRACTOR's personnel                                 X               X

- - -  PETROBRAS' personnel (up to 1300 meals
   a month)                                               X               X

- - -  PETROBRAS' personnel (exceeding 1300 meals
   a month)                                      X                        X

11.   BOP and riser lines tests, not programmed,
      carried out with the Cementing Unit.                X       X


                                       66

12.   Operations with special tools.                      X               X

13.   Air or sea transportation of the
      CONTRACTOR's equipment and personnel
      in the area of operation.                  X                X

14.   Air or sea transportation of the
      CONTRACTOR's personnel in the area
      of operation, besides those programmed
      for shift changes and Supervision
      personnel.                                          X     X or      X

15.   Air or sea transportation programmed
      but not used by the CONTRACTOR,
      without prior notice to PETROBRAS.                  X       X

16.   Air or sea transportation of the
      CONTRACTOR's material and/or personnel,
      in an emergency character, due to the
      CONTRACTOR's failure or lack of
      programming.                                        X       X

17.   All customs expenses, fees, including
      agent services, licences, taxes or
      similar charges regarding the import
      or shipment to the UNIT of all
      equipment, spare parts and
      consumables of the CONTRACTOR.                      X               X

18.   All expenses, including those with
      licences, taxes or similar charges
      regarding the vessel's adaptation and
      operation in accordance with the Laws,
      Rules, Decrees, Administrative Rules
      and Instructions in force in Brazil.               X               X

19.   Services of submarine inspection,
      measurement, intervention, etc. with a
      remote operated submarine vehicle.        X                X

20    Services to interconnect the boom lines
      with the burners.                                          X       X

21 Special repair and recovery services
   with qualified welding in equipments
   and lines belonging to:

   a) PETROBRAS                                  X                X

   b) CONTRACTOR                                          X               X

22. Communication services via satellite,
    when used by:

   -  PETROBRAS                                  X              X or      X

   -  the CONTRACTOR                                      X     X or      X

23.   Maintenance of communication service
      via satellite.                                      X     X or      X


                                       67

24.   Rental of Brasilsat satellite signal       X              X or      X

25.   Rental of satellite signal for the DGPS             X               X

26.   Services in the burners supplied by
      Contractor.

   -  Operation during production tests          X                X


   -   Maintenance and repairs                            X               X


27.   Services for the Remote

   -  Operation Vehicle (ROV): Installation,
      operation, maintenance and removal of
      the vehicle                                X                X

   -  Welding services and adaptation work
      for the installation and removal of
      the vehicle, winch, command cabin,
      storehouse and workshop                              X               X

End of Attachment)............................................................


                                       68

                                  ATTACHMENT V

                LIST OF (MINIMUM) SPECIALIZED PERSONNEL ABOARD

      -     Captain or Barge                                           1

      -     Tool Pusher (1 superintendent on board)                    2

      -     Driller                                                    2

      -     Assistant Driller                                          2

      -     Derrickman                                                 2

      -     Roughneck                                                  6

      -     Crane operator                                             2

      -     Area Man                                                   8

      -     Welder                                                     2

      -     Watchstander                                               2

      -     Subsea Engineer                                            1

      -     Mechanic                                                   3

      -     Electrician                                                3

      -     Radio Operator (Portuguese speaker)                        2

      -     Male nurse                                                 1

      -     Storekeeper                                                1

      -     Safety guard                                               1

NOTE: Supplementary  personnel will be supplied  according to the CONTRACTOR's
      conveniences  and needs or to comply with the requirements of government
      laws....................................................................

(End of Attachment)...........................................................


                                       69

                                  ATTACHMENT VI

                       ENVIRONMENTAL OPERATING CONDITIONS

   (PERMISSIBLE LIMITS FOR ENVIRONMENTAL CONDITIONS ACTING SIMULTANEOUSLY)

- - --------------------------------------------------------------------------------
                                              PITCH
                                    HEAVE    OR ROLL    WIND    WAVE   CURRENT
       OPERATIONs                   (feet)   (Degrees) (MPH)   (feet)  (knots)
- - --------------------------------------------------------------------------------
Conductor's jetting/driving          2.0       2.5      30      3.0     1.5

Drilling                             2.5       3.0      30      3.0     1.5

Casing running                       2.0       3.0      30      3.0     1.5

Casing hanger setting                1.5       2.0      30      2.1     1.5

BOP running                          1.5       1.5      19      2.1     1.0

BOP setting                          1.5       1.5      19      2.1     0.75

Maneuvering                          3.5       3.0      44      8.5     1.5

LMPR disconnection                   7         4        51      10.5    1.0

LMRP connection                      1.5       1.5      19      2.1     0.75

Formation testing                    3.5       4.0      44      8.5     1.5

Operation with boats                 2.5       3.0      39      6.7     1.5

Running the ANM (lay-away)           1.5       1.5      19      2.1     0.75

Running the ANM (without lines)      1.5       1.5      19      2.1     0.75

Operation with flexitube             2.0       3.0      30      5.0     1.5

Operation with wire-line             3.0       4.0      44      8.5     1.5

Operation with BAP                   2.5       3.0      39      6.7     0.75

(End of Attachment)...........................................................


                                       70

                                 ATTACHMENT VII

                             PETROBRAS' SAFETY RULES
1.    Service Rule No. 46/71:_________________________________________________

      o     Safety Rules for Offshore Operations______________________________

2     Service Order No. 01/72:________________________________________________

      o     Operational Safety Rules - Continental Shelf______________________

3.    Service Rule No. 41/72L_________________________________________________

      o     Electricity-Safety Rules__________________________________________

4.    Service Order No. 01/76:________________________________________________

      o     Industrial Safety Rules (general)_________________________________

      o     Industrial Safety Rules (Drilling)________________________________

      o     Industrial Safety Rules (Production)______________________________

5.    General Safety Manual___________________________________________________

      o     Safety and Environmental Instruction for Contractors (E&P-BC)____

(End of Attachment)...........................................................



                                       71

                                 ATTACHMENT VIII

                            EQUIPMENT TESTING PROGRAM
      In order to carry out the  UNIT's  equipment  testing  in an easier  and
more agile manner,  the  CONTRACTOR  is to submit to PETROBRAS,  as quickly as
required the following documents:.............................................

1.    CERTIFICATES............................................................

      a)    Survey  and  Appraisal  Report,  updated  and valid for the fiscal
            year  regarding the Unit  offered,  issued by one of the entities:
            ABS, NOBLE & DENTON,  DNV,  LLOYDS or BUREAU  VERITAS,  and if the
            report is issued abroad,  it will be translated into Portuguese by
            a  sworn  public   translator   and  notarized  in  the  Brazilian
            Consulate.........................................................

      b)    Classification  or Class  Confirmation  Certificate for hull and
            equipment,  compatible  with  the  proposal  submitted  (certified
            copy);............................................................

      c)    Report on claims from the  classification  societies  mentioned in
            the  Class  Confirmation  Certificate  (in  the  event  there  are
            claims);..........................................................

NOTE:  PETROBRAS  will  evaluated  the  above  mentioned  documents  and  will
      mention in what time limits  eventual  claims  will be  settled,  and at
      PETROBRAS' judgment,  it can be at the time of the Unit' s inspection or
      at mobilization after the contract is signed............................

      d)    Freeboard Certificate;............................................

      e)    IOOP (International Oil Pollution Prevention) Certificate;........

      f)    IMO-MUD-CODE  Certificate-Mobile  Offshore  Drilling  Unit-latest
            edition (unnecessary for Drill Ship);.............................

      g)    Cargo Ship Safety Equipment Certificate;..........................

      h)    Cargo Ship Safety Construction;...................................

NOTE: All documents required are to be within their period of validity........



                                       72

2.    INDUSTRIAL SAFETY AND ENVIRONMENTAL CONTROL.............................

      -     Manuals and emergency plans in the Portuguese Language............

3.    STORAGE CAPACITY........................................................

      -     Complete floor plan of bulk movement system, specifying:.........

      a)    Exclusive lines to move cement;...................................

      b)    Exclusive lines to move bentonite and baritine;...................

      c)    Location  and  type of  bulk  line  valves  and  their  respective
            driving systems;..................................................

      d)    Pneumatic lines for cleaning and clearing bulk lines;.............

      e)    Location of the manometers;.......................................

      f)    Quantity, flow, operation pressure and location of compressors;...

      g)    Quantity,  flow, operating pressure and location of the air drying
            unit(s);..........................................................

      h)    Schematic  drawing  of each silo with  their  respective  aeration
            systems and points of connection with the bulk lines..............

4.    FLUID CIRCULATION AND PROCESSING SYSTEM.................................

      -     Sketch of the system  emphasizing  pulsation dampers (suction and
            tamping),  safety  valves,  feed  pumps,  position  of the suction
            lines in relation to the suction sieves' tanks and filters........

      -     Floor plan of the drilling fluid feed and discharge  lines showing
            the flexibility in relation to the sand traps and mud tanks.......

      -     Floor plan of the degasser  instalation  showing the active tank,
            separate  processed mud and gas discharge  lines,  emphasizing the
            connection point of this line with the gas discharge line.........



                                       73

      -     Floor plan of the mud tanks system,  emphasizing the supply lines,
            gun lines,  mixture funnel and centrifugal  pumps  interconnection
            lines.............................................................

5.    WELLHEAD SAFETY EQUIPMENT SYSTEM........................................

      -     Sketch of the BOP/LMRP, specifying lines, valves and
            measures/dimensions...............................................

      -     Floor  plan of the kill and choke  lines from the BOP to the choke
            manifold,  specifying  valves,  connections,   dampener  chambers,
            anchorage points and interconnection with the other systems.......

      -     Floor plan of the atmospheric air separator.......................

            -      Layout, of the trip tank instalation  giving the following
                   information:................................................

            a)    Capacity;..................................................

            b)    Location;...................................................

            c)     Sensitivity;...............................................

            d)     Measuring system;..........................................

            e)    Scale type;.................................................

            f)     Driller's scale visualization conditions;..................

            g)     Supply System for the above item...........................

      -     Floor plan of the stand pipe manifold,  specifying lines,  valves,
            manometers and interconnections with the other systems............

      -     Inspection   report on  the  riser,  riser  handling  tools  and
            connectors,  telescopic joint and flexible joint, according to the
            API RP 2P and RP 2Q  standards,  with update date not  exceeding 1
            year..............................................................

NOTE:  If the reports  indicate  the need of  repair in some  equipment,  the
      service performance certificates will also be submitted.................


                                       74

      -     Biannual inspection  certificate of the BOP,  with the
            manufacturer's approval...........................................

      -     Proof of technical hability of the well drilling and control
            personnel.........................................................

      -     To supply an internal  maintenance and rust prevention program for
            the marine risers and kill and choke lines........................

6.    ENERGY GENERATION SYSTEM................................................

      -     Unifilar  diagram  of  the  energy   generation  and  distribution
            system............................................................

7.    STABILITY

      -     To submit the vessel's stability curve,  updated in the proposal's
            conditions, in keeping with the environmental conditions...........

8.    DYNAMIC  POSITIONING  SYSTEM  (including the  motor generators  assembly,
      thrusters  and propellers)..............................................

      -     Schematic diagram of the dynamic positioning system...............

      -     To submit the  inspection  and tests  procedures to be carried out
            at every new location.............................................

      -     To submit the tests and  inspections  procedures to be carried out
            at the end of each contract year..................................

9.    DRILLING STRING AND ACCESSORIES.........................................

      -     Inspection  report on all equipment of the drilling and completion

            strings, subs and accessories (used equipment)....................


                                       75

      -     Purchase  voucher of the drill and  completion  strings,  subs and
            accessories (for new equipment)...................................
10.   FISHING TOOLS AND ACCESSORIES...........................................

      -     Inspection  report on all  components  of the fishing  tools (used
            equipment) or purchase voucher (for new tools)....................

11.   SUNDRY SYSTEMS..........................................................

      -     Winches load test certificate.....................................

      -     Description of the compressed air system, emphasizing compressors,
            layout of lines, valves and interconnection with the other
            systems...........................................................

      -     Preventive  Maintenance  Plans  with their  respective  timecharts

      -     Ballast and sewer flowchart.......................................

      -     Proof  will be  needed  for the  existence  on board and for the
            operating  capacity of all  equipment  and  accessories  listed in
            Attachments  C and D of  the  chartering  and  services  rendering
            contracts.........................................................

NOTE:       Such equipment must be in places of easy access for survey........

A)    RECEIPT TEST............................................................

      -     Proof  will be  needed  for the  existence  on  board  and for the
            operating  capacity of all  equipment  and  accessories  listed in
            Attachments  C and D of  the  chartering  and  services  rendering
            contracts.........................................................

NOTE:       Such equipment must be in places of easy access for survey........

      -     The  following  systems,  equipment and tools listed below will be
            checked, inspected and tested:.....................................

      1)    DRILL STRING, COMPONENTS AND ACCESSORIES..........................
            ----------------------------------------


                                       76

      -     The CONTRACTOR will submit recent inspection  reports,  according
            to the  specification  API RP7G for the  whole  drill  string  and
            accessories  such as,  but not  limited  to:  drill  pipes,  drill
            collars, HW, Subs,  stabilizers,  reamers,  bumper subs, lift-sub,
            kelly, slips, elevators,  fishing tools, etc, wich prove the good
            conditions  of the string  and its  accessories.  The  information
            from the reports and the general  conditions of the string and its
            accessories  will be checked by  PETROBRAS by means of a sampling
            inspection.   In  the  event  of  discrepancy   between  the  data
            submitted  by the  CONTRACTOR  and  those  checked  by  PETROBRAS,
            showing   an   inadequate   condition   of  the   string  and  its
            accessories,  the  CONTRACTOR  will carry out another  inspection,
            for its own account...............................................

NOTE 1: Any  equipment  refused  by the  inspection  will be  immediately
        repaired or replaced by the CONTRACTOR, for its own account...........

NOTE 2: For the string,  components  and new  accessories,  no  inspection
        report will be required,  documents  proving that such  equipment is new
        will be sufficient ...................................................

NOTE 3: The  CONTRACTOR's equipment will be stored and arranged so as to
        facilitate the inspection by sampling to be carried out by PETROBRAS..

      -     The same procedure  will be adopted for the telescopic  joints and
            flexible joints...................................................

      2)    EXTRACTOR OF SOLIDS...............................................

      The following will be examined:.........................................

      -     sieves,...........................................................

      -     dessander,........................................................

      -     degasser -  test suction and discharge............................

      -     centrifugue (if any)..............................................



                                       77

      The operation and work  pressure,  as well as the existence of manometers,
            will be checked...................................................

      3)    MUD TANKS AND VALVES..............................................

            Water proofness, working of the agitators, mixture funnel and
            depthgun, besides the existence of fixed marks to control the tanks
            volume will be checked............................................

      4)    CENTRIFUGAL  PUMPS................................................

      The following will be checked:..........................................

      -     working, vibration and noises;....................................

      -     Packing (leaks);..................................................

      -     Work pressures....................................................

NOTE: Items 3 and 4 will be tested with sea water.............................

      5)    MUD LABORATORY AND TEST EQUIPMENT.................................

            The  existence  on  board  and the  adequacy  to the  requirements
            described in Attachments B and C to this CONTRACT will be checked..

      6)    DRILLING DERRICK..................................................

            Maintenance  conditions  (corrosion),  fastening  system  and  the
            conditions of the travelling block rails will be examined.........

      7)    CROWN BLOCK.......................................................

            The pulleys  will be examined as to the profile  wear,  alignment,
            clearance, buckling of the axles, lubrication, etc................

      8)    MUD PUMPS.........................................................

            The following will be carried out:................................

      -     observation of working, vibrations, noises;.......................

      -     pressure and maximum work flows tests for the liner used;.........



                                       78

      -     safety valve working test;........................................

      -     checking of the suction and discharge pulsation dampeners;........

      -     watertightness  tests with  nominal  pressure of the mud pumps and
            of all manifold valves;...........................................

      -     watertightness  tests  with nominal  pressure  of  all  manifold
            valves of the stand pipe manifold and of the kelly hose;..........

      -     random  disassembling of the suction for visual  inspection of the
            piston, sleeve, packing, valve and seat...........................

      9)    SWIVEL............................................................

            The mandril,  gooseneck,  body,  etc.  will be checked and nominal
            pressure test with rotation will be performed.....................

      10)   MOTION COMPENSATOR................................................

            The piston  alignment,  lock bar,  alignment in the rail,  general
            conditions, leaks and chains will be checked......................


      11)   RISER AND GUIDE LINES TENSIONERS..................................

            The  general  conditions,   leaks,  pulleys  and  cables  will  be
            inspected.........................................................

      12)   RISER RECOIL SYSTEM/HANG OFF SYSTEM/ FILL-UP VALVE (if any)........

            The systems' operation will be checked ...........................

      13)   HIGH COMPRESSORS AND AIR RESERVOIRS...............................

            The  general  conditions,  leaks,  lines and system  yield will be
            checked...........................................................

      14)   TOP DRIVE.........................................................

            Working  tests  (connection  and  disconnection  of  one  or  more
            sections  of the  DP's)  will  be  carried  out  and  the  general
            conditions will be inspected......................................



                                       79

      15)   KELLY SPINNER.....................................................

            The general  conditions,  specially the rollers' wear, and working
            will be checked,  and  connection and  disconnection  operation of
            one or more DP's will be carried out..............................

      16)   HOOK..............................................................

            The general conditions and the locking system will be checked.....

      17)   TREAVELLING BLOCK.................................................

            -     The  pulleys  wear,  axles  alignment,  lubrication  system,
                  retraction system, etc., will be inspected..................

      18)   DRAWWORKS.........................................................

            -     The operation of the mechanical  break system (brake bands),
                  electromagnetic  (distance between irons,  voltage level and
                  SCR feeder  conditions),  cooling  system and clutches  will
                  be checked..................................................

            -     The operation of the cat-heads and height  limitator with the
                  assembly /disassembly of one or more command sections,  will
                  be checked..................................................

      19)   ROTARY TABLE......................................................

            The  operation  in high  and low,  brake  system,  tachometer  and
            lubrication system will be checked...............................

      20)   TRIO TANK.........................................................

            Capacity,  installation  site,  sensitivity of the level indicator
            system,   visualization   condition  and  supply  system  will  be
            inspected.........................................................

      21)   HYDRAULIC  TONGS AND  PNEUMATIC  SPIDER FOR CASING AND  PNEUMATIC
            TONGS FOR DRILL PIPES.............................................

      -     Operation  tests will be made and  maintenance  conditions will be
            checked...........................................................


                                       80

      22)   SAND-LINE OR WIRE-LINE SYSTEM.....................................

            -     Operation  of the  clutches  and  brake  will be  tested  by
                  lowering  the   photo-clinometer   inside  the  drill  string
                  coinciding  with the  photoclinometer  overshot test (TOTCO)
                  will be  tested.  Test to be made  on  location  before  the
                  beginning of the operations.................................

            -     The existence of an alignment  guide for the sand-line  cable
                  in the drum will be checked.................................

     23)   CHOKE MANIFOLD....................................................

            All  valves  with low  pressure  (300  psi)  and in high  pressure
            (system's work pressure).  Manometers,  hydraulic choke operation,
            manual choke, remote control panel, etc. will be tested............

      24)   UPPER AND LOWER KELLY COCK, INSIDE BOP AND SAFETY VALVE............

            -     Drivers will be tested and work pressure tests will be made..

            -     The end  connections  of each  element  will be checked  and
                  tested with work pressure.  The  CONTRACTOR  should have end
                  seal plugs adequate for the test............................

      25)   KILL AND CHOKE LINE HOSES.........................................

            The end  connections  will be checked and tested with the system's
            work pressure.  The CONTRACTOR should have end seal plugs adequate
            for the test......................................................

      26)   DRILL INSTRUMENTATION SYSTEM......................................

            The following will be tested:.....................................

            -     geolograph;.................................................

            -     rotary table tachometer;....................................


                                       81

            -     manometers;.................................................

            -     stroke counter;.............................................

            -     level control in the mud tanks;.............................

            -     torque indicator ...........................................

            Their   existence  on  board  will  be  checked,   analysing   the
            maintenance  conditions of the lines by means of  inspection,  and
            the  facilities for  instalation of the production  test equipment
            system............................................................

      28)   BOP SYSTEM........................................................

            The following will be carried out:................................

            -     pressure tests of the slide valves with low pressure and high
                  pressure compatible with the system.........................

            -     pressure  tests of the  annulars  with low pressure and high
                  pressure, compatible with the system........................

            -     complete function test in both POD's, through all panels....

            -     choke and kill  valves  tested  with low  pressure  and high
                  pressure, compatible with the system........................

            -     working of the shear ram valve will be checked  with opening
                  for examination of the blades conditions....................

            -     the  opening  and  closing of all ram,  annular and kill and
                  choke valves chambers will be tested........................


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            -     the  hydraulic  driving  unit will be checked  as to:  fluid
                  used,  fluid  low  level  alarm,  low air  pressure  and low
                  accumulators  pressure,  maintenance  conditions,  leaks and
                  mixing systems..............................................

            -     the volumetric  capacity of accumulators and the capacity of
                  electric and pneumatic  pumps of the hydraulic  unit will be
                  tested......................................................

            -     the locking system of the ram valve(s) will be tested.......

            -     the SPM valves  conditions  will be  checked by opening  and
                  inspecting one of them, chosen at random....................

            -     the locking/unlocking  system of the H-4 hydraulic connectors
                  will be  tested.............................................
            -     the  surface  and  bottom  accumulators'  pre-charge  will be
                  checked.....................................................
            -     The operation of the following systems will be tested:......

                  o  Driving back-up...........................................

                  o  emergency recovery.......................................

                  o handling..................................................

      29)   TRAVELLING TONGS, EZY-TORG, TORQUE SENSOR, SLIPS, ETC.............

            One or more  sections of the drill collars and drill pipes will be
            assembled/disassembled  to check the  working  of such  equipment.
            The general maintenance conditions,  chuck jaws and cables will be
            checked...........................................................

      30)   BULK TRANSFER SYSTEM..............................................

            The following will be carried out: ...............................

            -     the  operation  of  the  compressor  will  be  checked,  and
                  noises,  oil and air leaks, and maintenance  state,  filters
                  and dehumidifier will be inspected..........................



                                       83

            -     operation and  watertightness  of valves,  lines and silos
                  will be checked, looking for possible clogging..............

            -     transfer  of cement  from 1 silo to the daily  silo (if any)
                  and  from this to the surge-tank will be made...............

      31)   EMERGENCY ENERGY GENERATION SYSTEM................................

      -     a  black-out  in  the  energy  system  generation  system  will  be
            simulated  to see if the  emergency  generator  is  automatically
            turned on.........................................................

      32)   MAIN MOTOR GENERATOR ASSEMBLY.....................................

            The following will be carried out:................................

            -     vibration,  noises,  insulation,  leaks,  maintenance,  etc.
                  will be checked.............................................

            -     generators  input and  output in the bus bar,  synchronisms
                  and load divisions will be tested...........................

            -     load and voltage and  frequency regulation will be tested...

      33)   DESSALTER.........................................................

            Operation and production capacity will be checked.................

      34)   CAT-LINES CRANES...................................................

            The following will be carried out:................................

            -     operation  of the  winches  and maintenance  of the cabled
                  will be checked.............................................

            -     the  elevation  and  rotation  system,  the  operation  with
                  flying boom and pulley  block and the  operation of the boom
                  height pawl will be checked.................................
            -     the report of the last inspection  carried out by the Unit's
                  classification society in the winches will be examined......

      35)   DEJECTA TREATMENT UNIT............................................



                                       84

            Its operation will be inspected...................................

      36)   TELECOMMUNICATION SYSTEM..........................................

            Operational tests will be made in all radio equipment  existing on
            board, including radio-beacon.....................................

      37)   OVERHEAD TRAVELLING CRANES........................................

            Their  operation,  and the  maintenance  conditions  of cables and
            sliders will be examined..........................................

      38)   DC/SCR MOTORS.....................................................

            The  maintenance  conditions  and  insulation,   as  well  as  the
            collectors and brushes will be examined...........................

            - SCR functional test.............................................

      39)   DIVERTER..........................................................

            The following will be tested:.....................................

            -     flow line wing valves;......................................

            -     diverters and insert packer lock;...........................

            -     the control panel will be checked...........................

     40)   SAFETY EQUIPMENT..................................................

            Salvage...........................................................

            Fireproof rigid vessels (capsules, whalers):......................

            -     lowering, motor, fuels, sprinklers, start;..................

            -     rations, garnishing,  hatches, cleaning, fire extinguishers,
                  signalling equipment........................................

            Inflatable rafts:.................................................

            -     quantity, capacity, location, height in relation to the sea;


                                       85

            -     validity  of the last  inspection,  means of  access  to the
                  sea;........................................................

            -     conditions of the cocoon....................................

            Jackets:

            -     quantity   (sufficiency),    location,    protection,    and
                  maintenance.................................................

            Life-buoys:.......................................................

            -     quantity (sufficiency),  location,  heaving-lines,  lanterns,
                  smudge pots.................................................

            Escape routes:....................................................

            -     vertical and horizontal signalling (indicative plates);.....

            -     clearing, lighting (emergency)..............................

            Water Supply System for Fire Fighting.............................

            Fire ring:........................................................

            -     water system for the platform;..............................

            -     sprinklers system; .........................................

            -     painting, corrosion, signaling, visual conditions;..........

            -     valves, hydrants, guns......................................

            Fire pumps:.......................................................

            -     operation; .................................................

            -     motor, fuel, start, panel, tests............................

            Fire Fighting Fixed Systems.......................................

            -     Foam system:  chambers,  tanks,  guns,  hydrants and carrier
                  liquid......................................................

            -     Cylinders;  conditions,  reloading, retesting (C02 or HALON,
                  if any).....................................................

            -     Lines and diffusers: general conditions.....................

            -     Automatic: feeding, panels, batteries, detectors, tests.....


                                       86

            -     Manual: commands, interconnections, tests...................

            -     Alarms: interconnections:...................................

            Fire Extinguishers................................................

            -     water, carbon dioxyde, chemical powder (portable and carts);

            -     distribution, location, general conditions;.................

            -     revision, recharge, retest, control, meters, replacement....

            Fire Posts........................................................

            -     hose, keys, sprinkler;......................................

            -     fiber boxes, general conditions, post identification;.......

            -     visual signaling:  sufficiency and general conditions.......

            Emergency Equipment...............................................

            -     autonomous    breathing     apparatuses,reserve     bottles,

                  breathable  air  fixed  system,   fire  proximity  clothing,
                  lantern, ax, safety belt;...................................

            -     distribution,   location,  general  conditions,   inventory,
                  maintenance and replacement.................................

            Communications and Alarms.........................................

            -     telephone (internal, external): Operating capacity;.........

            -     radiophony: VHF. operating capacity;........................

            -     portable  transceptors: quantity;  distribution,   intrinsic
                  safety;.....................................................

            -     intercom:  quantity,  distribution,  and  horns  audibility,
                  interconnection  with the  platform,  coding of sound  alarm
                  tones, amplifiers;..........................................

            -     visual signaling: sufficiency, general conditions;..........


                                       87

            -     fire alarm, glass breaking type:  batteries, bells, tests...

            Emergency Lighting................................................

            -     charger, batteries and lanterns.............................

            Helideck..........................................................

            -     protection: guns, fireextinguishers, salvage equipment;.....

            -     painting,  protection  screen,  net, landing lights,  safety
                  warnings;...................................................

            -     guest welcoming practices...................................

            Load Lifting......................................................

            -     winches:   general   conditions,    operation,    signaling,
                  maintenance;................................................

            -     manual   and   electric   tackles:    general    conditions,
                  operation, signalling, maintenance;.........................

            -     material movement and storage areas.........................

            Training..........................................................

            -     abandonment, fire fighting, first aid and brigade...........

            Manuals and Plans.................................................

            -     emergency; safety;..........................................

            -     disclosure, knowledge;......................................

            -     distribution, control, updating;............................

            -     tasks  schedules for emergency and  abandonment  situations,
                  including in Portuguese.....................................

            Order and Cleanliness.............................................

            -     installation's general aspect;..............................

            -     particularly alarming places................................


                                       88

            Smoke, Heat and Gas Detection System..............................

            -     test of hydrocarbons detection sensors......................

            Ballast and Sewer System..........................................


            -     functional test.............................................

      41)   ANCHORING SYSTEM..................................................

      42)   DYNAMIC POSITIONING SYSTEM........................................

      43)   PROPULSION SYSTEM.................................................

B)    LOCATION MOVING TEST....................................................

      To be defined between the CONTRACTOR and PETROBRAS......................

C)    BEGINNING OF CONTRACT YEAR TEST.........................................

      To be defined between the CONTRACTOR and PETROBRAS .....................

(End of Attachment)...........................................................


                                       89

                                  ATTACHMENT IX

                   PROCEDURES IN THE EVENT OF FATAL ACCIDENTS

1.      If, during the period of validity of the CONTRACT, a fatal accident
        occurs with a CONTRACTOR's employee, the CONTRACTOR should:...........

1.1.    Notify the Inspection immediately, for the proper measures;...........

1.2.    Take measures so that the employee's relatives be notified with the
        utmost urgency on the event, giving them the social support due;......

1.3.    Formally establish an Investigation Commission, within 48 hours after
        the accident, in order to, in the maximum time limit of 15 days,
        identify the causes and recommend the measures deemed necessary to
        prevent similar accidents.............................................

2.      The report should contain, at least, the following information
        regarding the accident

        - description;........................................................

        - exact location;.....................................................

        - data regarding the injured persons; ................................

        - basic and immediate causes;.........................................

        - measures to be taken in order to prevent its repetition.............

3.      The CONTRACTOR should guarantee the Commission enough authority and
        autonomy to carry out the investigations without any restrictions.....

4.      A PETROBRAS' employee should participate in the Commission, appointed by
        the authority in charge of the operational office....................

5.      After conclusion of the Commission's work, it will also behoove the
        CONTRACTOR, at the Inspection's request, to disclose the results of the
        report, so as to convey the experience from the accident to other
        contractor companies..................................................


                                       90

(End of Attachment)...........................................................

THESE BEING the precise terms and content of the aforementioned document, I
hereby set my Hand and Seal on this Translation, performed on December 22nd,
1997 in this City of Rio de Janeiro, Federative Republic of Brazil............


                                             /s/ MARCIA BARBOSA SERRA
                                             ------------------------
                                               Marcia Barbosa Serra
                                              Sworn Public Translator