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FARRAR OIL COMPANY
Assets acquired by Continental Resources of Illinois Inc in June 2001.



BAKER SERVICE TOOLS
Combined by Baker Hughes Inc. into Baker Oil Tools division in 1993.



CHERCO COMPRESSORS INC
See Weatherford Global Compression Services LP



CHEVRON CHEMICAL COMPANY
Polyethylene pipe units of Plexco (formerly of Chevron Chemical Co LP) and Phillips Driscopipe (formerly division of Phillips Petroleum Co) combined to create Performance Pipe.



COLUMBIAN STEEL TANK COMPANY
Columbian TecTank was formed in 2001 by the merger of Columbian Steel Tank, Kansas City and Peabody TecTank, Parsons, Kansas.



COMPUTALOG DRILLING SERVICES INC
Acquired by Precision Drilling Corp in 1999. See Weatherford International.



CUNNINGHAM-STOLDT INC
see Cunningham-Stoldt & Associates



DANIEL INDUSTRIES INC
See Daniel Division of Emerson Process Management



DARR POWER SYSTEMS
see Darr Equipment Co.



DELTA DISTRIBUTORS INC
See Brenntag Southwest Inc



EQUITY COMPRESSION INC
see Hawkins Energy Corp



ERC INDUSTRIES INC
Name changed to Wood Group Pressure Control



FLINT ENGINEERING & CONSTRUCTION CO
Acquired by Key Energy in 1998. See Key Energy Services Inc.



GAS COMPRESSION SERVICES INC
Merged with Universal Compression Inc in September 2000



HARBISON-WALKER REFRACTORIES COMPANY
Acquired by RHI Industries in January 2000, and was merged with North American Refractories to form RHI Refractories America.



HENNESSEY RENTAL TOOLS INC
Acquired by Basic Energy Services Inc. in August 2006.



HYDRO-STATIC TUBING TESTERS INC
Acquired by Basic Energy Services Inc. in August 2006.



JORDAN DRILLING FLUIDS
Merged with Anchor Drilling in 1996 to form Anchor Drilling Fluids USA Inc.



KOCH INDUSTRIAL PLANT SERVICES INC
Acquired by Diamond B Trucking Inc in 1995



LOYD JONES WELL SERVICING COMPANY
Acquired by Complete Production Services Inc in August 2006. See Complete Energy Services Inc.



LTV ENERGY PRODUCTS COMPANY
see Continental Emsco Company



M-I DRILLING FLUIDS LLC
See M-I LLC / M-I SWACO



MAJOR CONTROLS INC
see The Wellmark Company



WILSON SUPPLY COMPANY
Acquired by Smith International in April 1998



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