OIL STATES INTERNATIONAL INC
S-1, EX-10.3, 2000-08-10
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<PAGE>   1
                                                                    EXHIBIT 10.3

                                   FORM OF

                              SUPPORT AGREEMENT


         THIS SUPPORT AGREEMENT is entered into as of o, 2000, between Oil
States International, Inc., a Delaware corporation ("OSI"), and o, an Alberta
corporation ("PTI Holdco").

                                    RECITALS

A. Pursuant to a Combination Agreement dated as of July 31, 2000, by and among
OSI, HWC Energy Services, Inc., Merger Sub-HWC, Inc., Sooner Inc., Merger
Sub-Sooner Inc. and PTI Group Inc. ("PTI") (such agreement, as it may be amended
or restated, is hereinafter referred to as the "Combination Agreement"), the
parties agreed that on the Effective Date (as defined in the Combination
Agreement), OSI and PTI Holdco would execute and deliver a Support Agreement
containing the terms and conditions set forth in Exhibit C to the Combination
Agreement together with such other terms and conditions as may be agreed to by
the parties to the Combination Agreement acting reasonably;

B. Pursuant to an arrangement (the "Arrangement") effected by Articles of
Arrangement dated o, 2000 filed pursuant to the Business Corporations Act
(Alberta) (or any successor or other corporate statute by which PTI may in the
future be governed) (the "Act") each issued and outstanding common share of PTI
(a "PTI Common Share"), other than those cancelled pursuant to the Arrangement
or held by OSI, by a Subsidiary of OSI or by a U.S. shareholder of PTI, was
ultimately exchanged for Exchangeable Shares of PTI Holdco (the "Exchangeable
Shares");

C. The Articles of Incorporation of PTI Holdco set forth the rights, privileges,
restrictions and conditions (collectively, the "Exchangeable Share Provisions")
attaching to the Exchangeable Shares;

D. The parties hereto desire to make appropriate provision and to establish a
procedure whereby OSI will take certain actions and make certain payments and
deliveries necessary to ensure that PTI Holdco will be able to make certain
payments and to deliver or cause to be delivered shares of OSI Common Stock in
satisfaction of the obligations of PTI Holdco under the Exchangeable Share
Provisions with respect to the payment and satisfaction of dividends,
Liquidation Amounts, Retraction Prices and Redemption Prices, all in accordance
with the Exchangeable Share Provisions and to ensure that the shares of OSI
Common Stock are freely tradable in accordance with the provisions set out
herein;

         NOW, THEREFORE, in consideration of the respective covenants and
agreements provided in this agreement and for other good and valuable
consideration (the receipt and sufficiency of which are hereby acknowledged),
the parties agree as follows:



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                                   ARTICLE 1
                         DEFINITIONS AND INTERPRETATION

1.1      DEFINED TERMS

         Each term used but not otherwise defined herein shall have the meaning
attributed thereto in the Exchangeable Share Provisions, unless the context
requires otherwise.

1.2      INTERPRETATION NOT AFFECTED BY HEADINGS, ETC.

         The division of this agreement into articles, sections and paragraphs
and the insertion of headings are for convenience of reference only and shall
not affect the construction or interpretation of this agreement.

1.3      NUMBER, GENDER, ETC.

         Words importing the singular number only shall include the plural and
vice versa. Words importing the use of any gender shall include all genders.

1.4      DATE FOR ANY ACTION

         If any date on which any action is required to be taken under this
agreement is not a Business Day, such action shall be required to be taken on
the next succeeding Business Day.

                                   ARTICLE 2
                         COVENANTS OF OSI AND PTI HOLDCO

2.1      COVENANTS OF OSI REGARDING EXCHANGEABLE SHARES

         So long as any Exchangeable Shares are outstanding, OSI will:

         (a)   not declare or pay any dividend on the OSI Common Stock unless
               (i) PTI Holdco shall (w) simultaneously declare or pay, as the
               case may be, an equivalent dividend (as provided for in the
               Exchangeable Share Provisions) on the Exchangeable Shares (an
               "Equivalent Dividend"), and (x) have sufficient money or other
               assets or authorized but unissued securities available to enable
               the due declaration and the due and punctual payment, in
               accordance with applicable law, of any Equivalent Dividend, or
               (ii) PTI Holdco shall (y) subdivide the Exchangeable Shares in
               lieu of stock dividend thereon (as provided for in the
               Exchangeable Share Provisions) (an "Equivalent Stock
               Subdivision"), and (z) have sufficient authorized but unissued
               securities available to enable the Equivalent Stock Subdivision;

         (b)   advise PTI Holdco sufficiently in advance of the declaration by
               OSI of any dividend on OSI Common Stock and take all such other
               actions as are reasonably necessary in co-operation with PTI
               Holdco, to ensure that (i) the respective declaration date,
               record date and payment date for an Equivalent Dividend shall be
               the same as the declaration date, record date and payment date
               for the



                                      C-2
<PAGE>   3

               corresponding dividend on the OSI Common Stock or, (ii) the
               record date and effective date for an Equivalent Stock
               Subdivision shall be the same as the record date and payment date
               for the corresponding stock dividend on the OSI Common Stock;

         (c)   ensure that the record date for any dividend declared on OSI
               Common Stock is not less than ten Business Days after the
               declaration date for such dividend;

         (d)   take all such actions and do all such things as are necessary or
               desirable to enable and permit PTI Holdco, in accordance with
               applicable law, to pay and otherwise perform its obligations with
               respect to the satisfaction of the Liquidation Amount in respect
               of each issued and outstanding Exchangeable Share upon the
               liquidation, dissolution or winding-up of PTI Holdco or any other
               distribution of the assets of PTI Holdco for the purpose of
               winding-up its affairs, including without limitation all such
               actions and all such things as are necessary or desirable to
               enable and permit PTI Holdco to cause to be delivered shares of
               OSI Common Stock to the holders of Exchangeable Shares in
               accordance with the provisions of Article 5 of the Exchangeable
               Share Provisions;

         (e)   take all such actions and do all such things as are necessary or
               desirable to enable and permit PTI Holdco, in accordance with
               applicable law, to pay and otherwise perform its obligations with
               respect to the satisfaction of the Retraction Price and the
               Redemption Price, including without limitation all such actions
               and all such things as are necessary or desirable to enable and
               permit PTI Holdco to cause to be delivered shares of OSI Common
               Stock to the holders of Exchangeable Shares, upon the retraction
               or redemption of the Exchangeable Shares in accordance with the
               provisions of Article 6 or Article 7 of the Exchangeable Share
               Provisions, as the case may be; and

         (f)   not exercise its vote as a direct or indirect shareholder to
               initiate the voluntary liquidation, dissolution or winding-up of
               PTI Holdco nor take any action that, or omit to take any action
               the omission of which, is designed to or would result in the
               liquidation, dissolution or winding-up of PTI Holdco.

2.2      SEGREGATION OF FUNDS

         OSI will cause PTI Holdco to deposit a sufficient amount of funds in a
separate account and segregate a sufficient amount of such assets and other
property as is necessary to enable PTI Holdco to pay or otherwise satisfy the
applicable dividends, Liquidation Amount, Retraction Price or Redemption Price,
in each case for the benefit of holders from time to time of the Exchangeable
Shares, and PTI Holdco will use such funds, assets and other property so
segregated exclusively for the payment of dividends and the payment or other
satisfaction of the Liquidation Amount, the Retraction Price or the Redemption
Price, as applicable, net of any corresponding withholding tax obligations and
for the remittance of such withholding tax obligations.



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2.3      RESERVATION OF SHARES OF OSI COMMON STOCK

         OSI hereby represents, warrants and covenants that it has irrevocably
reserved for issuance and will at all times keep available, free from
pre-emptive and other rights, out of its authorized and unissued capital stock
such number of shares of OSI Common Stock (or other shares or securities into
which OSI Common Stock may be reclassified or changed as contemplated by section
2.7 hereof) (i) as is equal to the sum of (A) the number of Exchangeable Shares
issued and outstanding from time to time and (B) the number of Exchangeable
Shares issuable upon the exercise of all rights to acquire Exchangeable Shares
outstanding from time to time and (ii) as are now and may hereafter be required
to enable and permit PTI Holdco to meet its obligations hereunder, under the
Voting and Exchange Trust Agreement, under the Exchangeable Share Provisions and
under any other security or commitment pursuant to the Arrangement with respect
to which OSI may now or hereafter be required to issue shares of OSI Common
Stock.

2.4      NOTIFICATION OF CERTAIN EVENTS

         In order to assist OSI to comply with its obligations hereunder, PTI
Holdco will give OSI notice of each of the following events at the time set
forth below:

         (a)   immediately, in the event of any determination by the Board of
               Directors of PTI Holdco to take any action which would require a
               vote of the holders of Exchangeable Shares for approval;

         (b)   immediately, upon the earlier of (i) receipt by PTI Holdco of
               notice of, and (ii) PTI Holdco otherwise becoming aware of, any
               threatened or instituted claim, suit, petition or other
               proceedings with respect to the involuntary liquidation,
               dissolution or winding-up of PTI Holdco or to effect any other
               distribution of the assets of PTI Holdco among its shareholders
               for the purpose of winding-up its affairs;

         (c)   immediately, upon receipt by PTI Holdco of a Retraction Request
               (as defined in the Exchangeable Share Provisions);

         (d)   at least 45 days prior to any Automatic Redemption Date
               determined by the Board of Directors of PTI Holdco in accordance
               with clause (b) of the definition of Automatic Redemption Date in
               the Exchangeable Share Provisions; and

         (e)   in the event of any determination by the Board of Directors of
               PTI Holdco to institute voluntary liquidation, dissolution or
               winding-up proceedings with respect to PTI Holdco or to effect
               any other distribution of the assets of PTI Holdco among its
               shareholders for the purpose of winding-up its affairs, at least
               30 days prior to the proposed effective date of such liquidation,
               dissolution, winding-up or other distribution.



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2.5      DELIVERY OF SHARES OF OSI COMMON STOCK

         In furtherance of its obligations hereunder, upon notice of any event
which requires PTI Holdco to cause to be delivered shares of OSI Common Stock to
any holder of Exchangeable Shares, OSI shall forthwith issue and deliver the
requisite shares of OSI Common Stock to or to the order of the former holder of
the surrendered Exchangeable Shares, as PTI Holdco shall direct. All such shares
of OSI Common Stock shall be duly issued as fully paid and non-assessable and
shall be free and clear of any lien, claim, encumbrance, security interest or
adverse claim or interest.

2.6      QUALIFICATION OF SHARES OF OSI COMMON STOCK

         OSI covenants that if any shares of OSI Common Stock (or other shares
or securities into which OSI Common Stock may be reclassified or changed as
contemplated by Section 2.7 hereof) to be issued and delivered hereunder
(including for greater certainty, pursuant to the Exchangeable Share Provisions,
or pursuant to the Exchange Right or the Automatic Exchange Rights (all as
defined in the Voting and Exchange Trust Agreement)) require registration or
qualification with or approval of or the filing of any document including any
prospectus or similar document, the taking of any proceeding with or the
obtaining of any order, ruling or consent from any governmental or regulatory
authority under any Canadian or United States federal, provincial or state law
or regulation or pursuant to the rules and regulations of any regulatory
authority, or the fulfillment of any other legal requirement (collectively, the
"Applicable Laws") before such shares (or other shares or securities into which
OSI Common Stock may be reclassified or changed as contemplated by Section 2.7
hereof) may be issued and delivered by OSI to the initial holder thereof (other
than PTI Holdco) or in order that such shares may be freely tradeable thereafter
(other than any restrictions on transfer by reason of a holder being a "control
person" of OSI for purposes of Canadian federal or provincial securities law or
an "affiliate" of OSI for purposes of United States federal or state securities
law and provided such trade is conducted through facilities of a stock exchange
outside Canada), OSI will in good faith expeditiously take all such actions and
do all such things as are necessary and permitted by Applicable Laws to cause
such shares of OSI Common Stock (or other shares or securities into which OSI
Common Stock may be reclassified or changed as contemplated by Section 2.7
hereof) to be and remain duly registered, qualified or approved at all times in
order that such shares may be issued and delivered by OSI to the initial holder
thereof (other than PTI Holdco) and in order that such shares or securities may
be freely tradeable thereafter (other than any restrictions on transfer by
reason of a holder being a "control person" of OSI for purposes of Canadian
provincial securities law or an "affiliate" of OSI for purposes of United States
federal or state securities law provided such trade is conducted through
facilities of a stock exchange outside Canada) including, without limitation,
the filing and maintenance of a registration statement under the Securities Act
of 1933; provided, however, that notwithstanding the foregoing, OSI will not be
required to take any action, including, without limitation, the filing of a
registration statement, under any United States federal or state securities law
in respect of the OSI Common Stock (or other shares or securities into which OSI
common stock may be reclassified or changed as contemplated by Section 2.7
hereof) to be issued and delivered hereunder (including, for greater certainty,
pursuant to the Exchangeable Share Provisions, or pursuant to the Exchange Right
and the Automatic Exchange Rights) until the first anniversary of the Effective
Date unless such shares or securities are being, or are to be, delivered
pursuant to Articles 5 or 7 of the Exchangeable Share Provisions, pursuant to
the Exchange Rights or the Automatic Exchange Rights, or pursuant to the
Liquidation Call Right or the Redemption Call Right. From and after the first
anniversary of the Effective Date (or such earlier date as such shares or
securities may be issued and delivered pursuant to



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Articles 5 or 7 of the Exchangeable Share Provisions, pursuant to the Exchange
Rights or the Automatic Exchange Rights or pursuant to the Liquidation Call
Right or the Redemption Call Right), OSI will in good faith expeditiously take
all such actions and do all such things as are necessary to cause all shares of
OSI Common Stock (or other shares or securities into which OSI Common Stock may
be reclassified or changed as contemplated by Section 2.7 hereof) to be
delivered hereunder (including, for greater certainty, pursuant to Exchangeable
Share Provisions, or pursuant to the Exchange Right or the Automatic Exchange
Rights) to be listed, quoted or posted for trading on all stock exchanges and
quotation systems on which such shares are listed, quoted or posted for trading
at such time immediately upon their issuance.

2.7      EQUIVALENCE

         (a)   OSI will not:

               (i)   issue or distribute shares of OSI Common Stock (or
                     securities exchangeable for or convertible into or carrying
                     rights to acquire shares of OSI Common Stock) to the
                     holders of all or substantially all of the then outstanding
                     shares of OSI Common Stock by way of stock dividend or
                     other distribution; or

               (ii)  issue or distribute rights, options or warrants to the
                     holders of all or substantially all of the then outstanding
                     shares of OSI Common Stock entitling them to subscribe for
                     or to purchase shares of OSI Common Stock (or securities
                     exchangeable for or convertible into or carrying rights to
                     acquire shares of OSI Common Stock); or

               (iii) issue or distribute to the holders of all or substantially
                     all of the then outstanding shares of OSI Common Stock (A)
                     shares or securities of OSI of any class other than OSI
                     Common Stock (other than shares convertible into or
                     exchangeable for or carrying rights to acquire shares of
                     OSI Common Stock), (B) rights, options or warrants other
                     than those referred to in subsection 2.7 (a) (ii) above,
                     (C) evidences of indebtedness of OSI or (D) assets of OSI;

               unless

               (iv)  one or both of OSI and PTI Holdco is permitted under
                     applicable law to issue or distribute the economic
                     equivalent on a per share basis of such rights, options,
                     warrants, securities, shares, evidences of indebtedness or
                     other assets to the holders of the Exchangeable Shares; and

               (v)   one or both of OSI and PTI Holdco shall issue or distribute
                     the economic equivalent on a per share basis of such
                     rights, options, warrants, securities,




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                     shares, evidences of indebtedness or other assets
                     simultaneously to the holders of the Exchangeable Shares.

          (b)  OSI will not:

               (i)   subdivide, redivide or change the then outstanding shares
                     of OSI Common Stock into a greater number of shares of OSI
                     Common Stock; or

               (ii)  reduce, combine or consolidate or change the then
                     outstanding shares of OSI Common Stock into a lesser number
                     of shares of OSI Common Stock; or

               (iii) reclassify or otherwise change the shares of OSI Common
                     Stock or effect an amalgamation, merger, reorganization or
                     other transaction involving or affecting the shares of OSI
                     Common Stock;

               unless

               (iv)  PTI Holdco is permitted under applicable law to
                     simultaneously make the same or an economically equivalent
                     change to, or in the rights of the holders of, the
                     Exchangeable Shares; and

               (v)   the same or an economically equivalent change is
                     simultaneously made to, or in the rights of the holders of,
                     the Exchangeable Shares.

          (c)  OSI will ensure that the record date for any event referred to in
               section 2.7(a) or 2.7(b) above, or (if no record date is
               applicable for such event) the effective date for any such event,
               is not less than 10 Business Days after the date on which such
               event is declared or announced by OSI (with simultaneous notice
               thereof to be given by OSI to PTI Holdco).

          (d)  The Board of Directors of PTI Holdco shall determine, in good
               faith and in its sole discretion, economic equivalence for the
               purposes of any event referred to in Section 2.7(a) or 2.7(b)
               above and each such determination shall be conclusive and binding
               on OSI. In making each such determination, the following factors
               shall, without excluding other factors determined by the Board of
               Directors of PTI Holdco to be relevant, be considered by the
               Board of Directors of PTI Holdco:

               (i)   in the case of any stock dividend or other distribution
                     payable in OSI Common Stock, the number of such shares
                     issued in proportion to the number of shares of OSI Common
                     Stock previously outstanding;

               (ii)  in the case of the issuance or distribution of any rights,
                     options or warrants to subscribe for or purchase OSI Common
                     Stock (or securities exchangeable for or convertible into
                     or carrying rights to acquire OSI Common Stock), the
                     relationship between the exercise price of each such right,
                     option or warrant and the current market value (as
                     determined by the




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                     Board of Directors of PTI Holdco in the manner contemplated
                     below) of a share of OSI Common Stock;

               (iii) in the case of the issuance or distribution of any other
                     form of property (including without limitation any share or
                     securities of OSI of any class other than OSI Common Stock,
                     any rights, options or warrants other than those referred
                     to in Section 2.7(d)(ii) above, any evidences of
                     indebtedness of OSI or any assets of OSI), the relationship
                     between the fair market value (as determined by the Board
                     of Directors of PTI Holdco in the manner above
                     contemplated) of such property to be issued or distributed
                     with respect to each outstanding share of OSI Common Stock
                     and the current market value (as determined by the Board of
                     Directors of PTI Holdco in the manner contemplated below)
                     of a share of OSI Common Stock;

               (iv)  in the case of any subdivision, redivision or change of the
                     then outstanding shares of OSI Common Stock into a greater
                     number of shares of OSI Common Stock or the reduction,
                     combination, consolidation or change of the then
                     outstanding shares of OSI Common Stock into a lesser number
                     of shares of OSI Common Stock or any amalgamation, merger,
                     reorganization or other transaction affecting shares of OSI
                     Common Stock, the effect thereof upon the then outstanding
                     shares of OSI Common Stock; and

               (v)   in all such cases, the general taxation consequences of the
                     relevant event to holders of Exchangeable Shares to the
                     extent that such consequences may differ from the taxation
                     consequences to holders of shares of OSI Common stock as a
                     result of differences between taxation laws of Canada and
                     the United States (except for any differing consequences
                     arising as a result of differing marginal taxation rates
                     and without regard to the individual circumstances of
                     holders of Exchangeable Shares).

               For purposes of the foregoing determinations, the current market
               value of any security listed and traded or quoted on a securities
               exchange shall be the average of the closing price of such
               security during a period of not less than 20 consecutive trading
               days ending not more than five trading days before the date of
               determination on the principal securities exchange on which such
               securities are listed and traded or quoted; provided, however,
               that if in the opinion of the Board of Directors of PTI Holdco
               the public distribution or trading activity of such securities
               during such period does not create a market which reflects the
               fair market value of such securities, then the current market
               value thereof shall be determined by the Board of Directors of
               PTI Holdco, in good faith and in its sole discretion, and
               provided further than any such determination by the Board of
               Directors of PTI Holdco shall be conclusive and binding on OSI.

         (e)   PTI Holdco agrees that, to the extent required, upon due notice
               from OSI, PTI Holdco will use its best efforts to take or cause
               to be taken such steps as may be




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                     necessary for the purposes of ensuring that appropriate
                     dividends are paid or other distributions are made by PTI
                     Holdco, or subdivisions, redivisions or changes are made to
                     the Exchangeable Shares, in order to implement the required
                     economic equivalence with respect to the OSI Common Stock
                     and Exchangeable Shares as provided for in this Section
                     2.7.

2.8      TENDER OFFERS, ETC.

         In the event that a tender offer, share exchange offer, issuer bid,
take-over bid or similar transaction with respect to OSI Common Stock (an
"Offer") is proposed by OSI or is proposed to OSI or its shareholders and is
recommended by the Board of Directors of OSI, or is otherwise effected or to be
effected with the consent or approval of the Board of Directors of OSI, and the
Exchangeable Shares are not redeemed by PTI Holdco or purchased by OSI or OSI
ULC pursuant to the Redemption Call Right, OSI shall, expeditiously and in good
faith, take all such actions and do all such things as are necessary or
desirable to enable and permit holders of Exchangeable Shares to participate in
such Offer to the same extent and on an equivalent basis as the holders of
shares of OSI Common Stock, without discrimination, including, without limiting
the generality of the foregoing, OSI will use its good faith efforts
expeditiously to (and shall, in the case of a transaction proposed by OSI or
where OSI is a participant in the negotiation thereof) ensure that holders of
Exchangeable Shares may participate in all such Offers without being required to
retract Exchangeable Shares as against PTI Holdco (or, if so required, to ensure
that any such retraction shall be effective only upon, and shall be conditional
upon, the closing of the Offer and only to the extent necessary to tender or
deposit to the Offer).

2.9      OWNERSHIP OF OUTSTANDING SHARES

         Without the prior approval of PTI Holdco and the prior approval of the
holders of the Exchangeable Shares given in accordance with Section 9.2 of the
Exchangeable Share Provisions, OSI covenants and agrees in favor of PTI Holdco
that, as long as any outstanding Exchangeable Shares are owned by any person or
entity other than OSI or any of its Subsidiaries, OSI, alone or together with
any direct or indirect wholly-owned subsidiary of OSI, will be and remain the
beneficial owner of all issued and outstanding securities of PTI Holdco.
Notwithstanding the foregoing, OSI shall not be in violation of this Section if
any person or group of persons acting jointly or in concert acquires OSI Common
Stock pursuant to any merger of OSI pursuant to which OSI was not the surviving
corporation.

2.10     OSI NOT TO VOTE EXCHANGEABLE SHARES

         OSI covenants and agrees that it will appoint and cause to be appointed
proxy holders with respect to all Exchangeable Shares held by OSI and its
Subsidiaries for the sole purpose of attending each meeting of holders of
Exchangeable Shares in order to be counted as part of the quorum for each such
meeting. OSI further covenants and agrees that it will not, and will cause its
Subsidiaries not to, exercise any voting rights which may be exercisable by
holders of Exchangeable Shares from time to time pursuant to the Exchangeable
Share Provisions or pursuant to the provisions of the Act with respect to any
Exchangeable Shares held by it or by its Subsidiaries in respect of any matter
considered at any meeting of holders of Exchangeable Shares.



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2.11     DUE PERFORMANCE

         On and after the Effective Date, OSI shall duly and timely perform all
of its obligations provided for in connection with the Plan of Arrangement and
the Articles of Incorporation of PTI Holdco, including any obligations that may
arise upon the exercise of OSI's rights under the Exchangeable Share Provisions.

                                  ARTICLE 3
                                   GENERAL

3.1      TERM

         This agreement shall come into force and be effective as of the date
hereof and shall terminate and be of no further force and effect at such time as
no Exchangeable Shares (or securities or rights convertible into or exchangeable
for or carrying rights to acquire Exchangeable Shares) are held by any party
other than OSI and any of its Subsidiaries.

3.2      CHANGES IN CAPITAL OF OSI AND PTI HOLDCO

         Notwithstanding the provisions of section 3.4 hereof, at all times
after the occurrence of any event effected pursuant to section 2.7 or 2.8
hereof, as a result of which either OSI Common Stock or the Exchangeable Shares
or both are in any way changed, this agreement shall forthwith be amended and
modified as necessary in order that it shall apply with full force and effect,
mutatis mutandis, to all new securities into which OSI Common Stock or the
Exchangeable Shares or both are so changed, and the parties hereto shall as soon
as possible execute and deliver an agreement in writing giving effect to and
evidencing such necessary amendments and modifications.

3.3      SEVERABILITY

         If any provision of this agreement is held to be invalid, illegal or
unenforceable, the validity, legality or enforceability of the remainder of this
agreement shall not in any way be affected or impaired thereby and this
agreement shall be carried out as nearly as possible in accordance with its
original terms and conditions.

3.4      AMENDMENTS, MODIFICATIONS, ETC.

         This agreement may not be amended, modified or waived except by an
agreement in writing executed by PTI Holdco and OSI and approved by the holders
of the Exchangeable Shares in accordance with Section 10.2 of the Exchangeable
Share Provisions.

3.5      MINISTERIAL AMENDMENTS

         Notwithstanding the provisions of section 3.4, the parties to this
agreement may in writing, at any time and from time to time, without the
approval of the holders of the Exchangeable Shares, amend or modify this
agreement for the purposes of:



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<PAGE>   11

         (a)   adding to the covenants of either or both parties for the
               protection of the holders of the Exchangeable Shares;

         (b)   making such amendments or modifications not inconsistent with
               this agreement as may be necessary or desirable with respect to
               matters or questions which, in the opinion of the board of
               directors of each of PTI Holdco and OSI, it may be expedient to
               make, provided that each such board of directors shall be of the
               opinion that such amendments or modifications will not be
               prejudicial to the interests of the holders of the Exchangeable
               Shares; or

         (c)   making such changes or corrections which, on the advice of
               counsel to PTI Holdco and OSI, are required for the purpose of
               curing or correcting any ambiguity or defect or inconsistent
               provision or clerical omission or mistake or manifest error;
               provided that the boards of directors of each of PTI Holdco and
               OSI shall be of the opinion that such changes or corrections will
               not be prejudicial to the interests of the holders of the
               Exchangeable Shares.

3.6      MEETING TO CONSIDER AMENDMENTS

         PTI Holdco, at the request of OSI, shall call a meeting or meetings of
the holders of the Exchangeable Shares for the purpose of considering any
proposed amendment or modification requiring approval of such shareholders. Any
such meeting or meetings shall be called and held in accordance with the by-laws
of PTI Holdco, the Exchangeable Share Provisions and all Applicable Laws.

3.7      AMENDMENTS ONLY IN WRITING

         No amendment to or modification or waiver of any of the provisions of
this agreement otherwise permitted hereunder shall be effective unless made in
writing and signed by both of the parties hereto and approved by holders of
Exchangeable Shares pursuant to Section 9.2 of the Exchangeable Share
Provisions.

3.8      INUREMENT

         This agreement shall be binding upon and inure to the benefit of the
parties hereto and each of their respective heirs, successors and assigns.

3.9      NOTICES TO PARTIES

         All notices and other communications between the parties shall be in
writing and shall be deemed to have been given if delivered personally or by
confirmed telecopy to the parties at the following addresses (or at such other
address for either such party as shall be specified in like notice):



                                      C-11
<PAGE>   12

         (a)   if to OSI:

               Oil States International, Inc.
               Three Allen Center
               333 Clay Street, Suite 333460
               Houston, Texas 77002

               Attention:  Cindy B. Taylor
               Fax:  (713) 652-0499

               with a copy to:

               Donahue, Ernst & Young LLP
               1000 Ernst & Young Tower
               440 - 2nd Avenue S.W.
               P.O. Box 2258, station M
               Calgary, Alberta T2P 5E5

               Attention:  Richard Peters
               Fax:  (403) 206-5525

         (b)   if to PTI Holdco to:

               Three Allen Center
               333 Clay Street, Suite 333460
               Houston, Texas 77002

               Attention:  Cindy B. Taylor
               Fax:  (713) 652-0499

         Any notice or other communication given personally shall be deemed to
have been given and received upon delivery thereof and if given by telecopy
shall be deemed to have been given and received on the date of confirmed receipt
thereof, unless such day is not a Business Day, in which case it shall be deemed
to have been given and received upon the immediately following Business Day.

3.10     COUNTERPARTS

         This agreement may be executed in counterparts, each of which shall be
deemed an original, and all of which taken together shall constitute one and the
same instrument. Executed counterparts of this agreement may be delivered by
facsimile transmission.

3.11     JURISDICTION

         This agreement shall be construed and enforced in accordance with the
laws of the Province of Alberta and the federal laws of Canada applicable
therein.



                                      C-12
<PAGE>   13
3.12     ATTORNMENT

         OSI agrees that any action or proceeding arising out of or relating to
this agreement may be instituted in the courts of the Province of Alberta,
waives any objection which it may have now or hereafter to the venue of any such
action or proceeding, irrevocably submits to the jurisdiction of such courts in
any such action or proceeding, agrees to be bound by any judgment of such courts
and not to seek, and hereby waives, any review of the merits of any such
judgment by the courts of any other jurisdiction and hereby appoints PTI Holdco
at its registered office in the Province of Alberta as OSI's attorney for
service of process.

         IN WITNESS WHEREOF, OSI and PTI Holdco have caused this agreement to be
signed by their respective officers thereunder duly authorized, all as of the
date first written above.

                                           OIL STATES INTERNATIONAL, INC.

                                           Per:
                                               --------------------------------


                                           Per:
                                               --------------------------------




                                      C-13


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