EXHIBIT D JOINT FILING AGREEMENT The undersigned each agree as follows: (i) that certain Amendment to the Statement on Schedule 13D relating to the Common Stock, par value $.01 per share, of Varco International, Inc., a Delaware corporation, is filed...

                                                                       EXHIBIT D

                             JOINT FILING AGREEMENT

         The undersigned each agree as follows: (i) that certain Amendment to
the Statement on Schedule 13D relating to the Common Stock, par value $.01 per
share, of Varco International, Inc., a Delaware corporation, is filed on behalf
of each of them, (ii) such Statement on Schedule 13D is adopted by each of them,
(iii) all future amendments to such Statement on Schedule 13D will, unless
written notice to the contrary is delivered as described below, be jointly filed
on behalf of each of them, and (iv) the provisions of Rule 13d-1(f)(1) under the
Securities Exchange Act of 1934, as amended, apply to each of them. This
Agreement may be terminated with respect to the obligation to file jointly
future amendments to such Statement on Schedule 13D as to any of the undersigned
upon such person giving written notice thereof to each of the other persons
signatory hereto, at the principal office thereof.

         EXECUTED as of June 10, 2003.



                               
                                  SCF-III, L.P.
                                  By:      SCF-II, L.P.
                                           By:      X.X. Xxxxxxx & Associates, Incorporated
                                                    By:               /s/ Xxxxxxx XxXxxx
                                                             --------------------------------------------
                                                             Xxxxxxx XxXxxx, Managing
                                                             Director

                                  SCF-II, L.P.
                                  By:      X.X. Xxxxxxx & Associates, Incorporated
                                           By:               /s/ Xxxxxxx XxXxxx
                                                    -----------------------------------------------------
                                                    Xxxxxxx XxXxxx, Managing Director

                                  FGSI PARTNERS, L.P.
                                  By:      SCF Partners, L.P.
                                           By:      X.X. Xxxxxxx & Associates, Incorporated
                                                    By:               /s/ Xxxxxxx XxXxxx
                                                             --------------------------------------------
                                                             Xxxxxxx XxXxxx, Managing
                                                             Director



                                       16


                                
                                   SCF PARTNERS, L.P.
                                   By:      X.X. Xxxxxxx & Associates, Incorporated
                                            By:               /s/ Xxxxxxx XxXxxx
                                                     -----------------------------------------------------
                                                     Xxxxxxx XxXxxx, Managing Director

                                   X.X. XXXXXXX & ASSOCIATES, INCORPORATED
                                   By:               /s/ Xxxxxxx XxXxxx
                                            --------------------------------------------------------------
                                            Xxxxxxx XxXxxx, Managing Director

                                   X.X. XXXXXXX

                                                     /s/ X.X. Xxxxxxx
                                   -----------------------------------------------------------------------
                                   X.X. Xxxxxxx, individually



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