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EXHIBIT 21.1 BJ SERVICES COMPANY
SUBSIDIARIES
Name of Entity/Jurisdiction of Organization Percentage Owned By
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Registrant Subsidiary
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BJ Services Company Middle East (Delaware) . . . . . . . . . . . . . . . . . . . . . 100%
Gulf Well Services Company (Kuwait) (Joint Venture) . . . . . . . . . . . . . . . 40%
BJ Services Company Overseas (Delaware) . . . . . . . . . . . . . . . . . . . . . . . 100%
BJ Services Company, U.S.A. (Delaware) . . . . . . . . . . . . . . . . . . . . . . . 100%
Western Petroleum Services, Inc. (Delaware) . . . . . . . . . . . . . . . . . . . 100%
Western Petroleum Services International Company (Delaware) . . . . . . . . . . . 100%
Western Petroleum Services International Nigeria Ltd. (Nigeria) (Joint Venture) 80%
P.T. Western Petroleum Servindo (Indonesia) (Joint Venture) . . . . . . . . . . 64%
Western Rotary Petroleum Services KFT (Hungary) (Joint Venture) . . . . . . . . 50%
Western Oceanic (Nigeria) Ltd. (Nigeria) (Joint Venture) . . . . . . . . . . . . . 60%
Colony Drilling Company Limited (UK) . . . . . . . . . . . . . . . . . . . . . . . 100%
Western Petroleum Services (U.K.) Ltd. (UK) . . . . . . . . . . . . . . . . . . 100%
Western Oceanic Services, Inc. (Delaware) . . . . . . . . . . . . . . . . . . . . 100%
Western Services International, Inc. (Delaware) . . . . . . . . . . . . . . . . . 100%
Western Oilfield Supply & Rental, Inc. (Delaware) . . . . . . . . . . . . . . . . 100%
Western Oceanic, Inc. (Delaware) . . . . . . . . . . . . . . . . . . . . . . . . . 100%
Western Oceanic International, Inc. (Panama) . . . . . . . . . . . . . . . . . 100%
Altomar Perfuracoes Maritimas Ltda. (Brazil) . . . . . . . . . . . . . . . 99.99%
Saturn Energy Company (Delaware) . . . . . . . . . . . . . . . . . . . . . . . . 100%
Offshore International Ltd. (Delaware) . . . . . . . . . . . . . . . . . . . . . 100%
WOI, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100%
BJ Service International, Inc. (Delaware) . . . . . . . . . . . . . . . . . . . . . . 100%
BJ-Hughes C.I. Ltd. (Cayman Islands) . . . . . . . . . . . . . . . . . . . . . . . 100%
BJ Oilwell Services (Malaysia) Sdn. Bhd. (Joint Venture) . . . . . . . . . . . . . 65%
BJ Service International (Thailand) Ltd. . . . . . . . . . . . . . . . . . . . . . 100%
BJ Service Arabia Ltd. (Saudi Arabia) (Joint Venture) . . . . . . . . . . . . . . 70%
BJ Services C.I., Ltd. (Cayman Islands) . . . . . . . . . . . . . . . . . . . . . 100%
BJ Services Canada Inc. (Alberta) . . . . . . . . . . . . . . . . . . . . . . . . 100%
BJ Services Company B.V. (Netherlands) . . . . . . . . . . . . . . . . . . . . . . 100%
BJ Services Company GmbH (Germany) . . . . . . . . . . . . . . . . . . . . . . 100%
BJ Services AS (Norway) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100%
BJ COMTEC AS (Norway . . . . . . . . . . . . . . . . . . . . . . . . . . . 100%
BJ Services Company Italia S.r.l. (Italy) . . . . . . . . . . . . . . . . . . . 100%
BJ Services Company Mexicana S.A. de C.V. (Mexico) . . . . . . . . . . . . . . . . 100%
BJ Services Company (Nigeria) Limited (Joint Venture) . . . . . . . . . . . . . . 60%
BJ Services Company S.A. (Panama) . . . . . . . . . . . . . . . . . . . . . . . . 100%
BJ Services Company Limited (Scotland) . . . . . . . . . . . . . . . . . . . . . . 100%
BJ Services Company (UK) Limited (Scotland) . . . . . . . . . . . . . . . . . . 100%
BJ Leasing Company Limited (Scotland-Vestfonn) . . . . . . . . . . . . . . . . 100%
BJS Oilfield Technology Limited . . . . . . . . . . . . . . . . . . . . . . . . 100%
BJS Services International Limited (Scotland) (Eastern Europe) . . . . . . . . 100%
BJ Services Company (Singapore) Pte. Ltd. Singapore) . . . . . . . . . . . . . . . 100%
BJ Services de Venezuela IV, C.A. (Venezuela) . . . . . . . . . . . . . . . . . . 100%
BJ Services de Venezuela, C.A. (Venezuela) . . . . . . . . . . . . . . . . . . 100%
BJ Services de Venezuela II, C.A. (Venezuela) . . . . . . . . . . . . . . 100%
BJ Services de Venezuela III, C.A. (Venezuela) . . . . . . . . . . . . 100%
BJ Services International S.A. (Panama) . . . . . . . . . . . . . . . . . . . . . 100%
BJ Pumping Services Company S.A. (Panama) (Joint Venture) . . . . . . . . . . . . 65%
BJ Services S.A. (Argentina) . . . . . . . . . . . . . . . . . . . . . . . . . . . 100%
Compania de Servicios Petroleros BJ Boliviana S.A.
(BJ Boliviana S.A.) (Bolivia) (Joint Venture) . . . . . . . . . . . . . . 49%
Hughes Services Eastern Hemishpere S.A.R.L. (France) . . . . . . . . . . . . . . . 100%
International Specialty Chemicals Ltd. (Cayman Islands) (Joint Venture) . . . . . 75%
P.T. BJ-Hughes Services Indonesia (Indonesia) (Joint Venture) . . . . . . . . . . 75%
SEBEP (Servicios Brasileiros Especializados em Petroleo S.A.) (Brazil) . . . . . . 100%
SEBEP Quimica Industria e Comercio Ltda. (Brazil) . . . . . . . . . . . . . . . 100%
SEBEX Oil Well Services, S.A. (Brazil) . . . . . . . . . . . . . . . . . . . . 100%
Societe Algerienne de Cimentation (ALCIM) (Algeria) (Joint Venture) . . . . . . . 49%