. . . EXHIBIT 21.1 WEATHERFORD INTERNATIONAL LTD. LIST OF SUBSIDIARIES AND AFFILIATES NAME JURISDICTION 315613 Alberta Ltd. Alberta 708621 Alberta Ltd. Alberta 721260 Alberta Ltd. Alberta A-1 Bit & Tool Co., B.V. Netherlands Aim Oil Tools, Inc. Texas Air Drilling Services Bolivia S.R.L. Bolivia Air Drilling Services Columbia Limited Colombia Air Drilling Services de Venezuela, C.A. Venezuela Air Drilling Services France (SARL) France Al Pine Mexicana, S.A. de C.V. Mexico Algerian Oilfield Services S.p.A. Algeria Alpine Oil Services (Cyprus) Ltd. Cyprus Alpine Oil Services Inc. North Dakota Alpine Oil Services International Ltd. Barbados Ampscot Overseas Petroleum Equipment Co., LLC Oman Ancil S.A.I.C. Argentina Aosi BV Netherlands Aquatronic Limited U.K. Astec Developments Limited U.K. B. D. Kendle Engineering Limited U.K. Bakke Oil Tools AS Norway Bakke Technology AS Norway Baktexas Azerbaijan BBL Aust. Pty Ltd Australia BBL Downhole Tools Limited U.K. Bit & Tool A-1 S.r.l. Italy BOSS Oilfield Services Limited U.K. Brit Bit Limited U.K. Calumet Petroleum Services, S.A. Venezuela Cardium International Limited Hong Kong Cardium Investments (Barbados) Limited Barbados Cardium Tool International Limited Barbados Clearwater International, L.L.C. Delaware Colombia Petroleum Services Corp. Delaware Communication Rentals Limited U.K. Contra-Shear Separation Technologies New Zealand CRC-Evans Automatic Welding, Inc. Texas CRC-Evans Pipeline International (UK) Limited U.K. CRC-Evans Services Limited U.K. CTC-Empresa Tecnica e Comercial de Equipamentos Ltda. Brazil Dailey de Venezuela, S.A. Venezuela Dailey del Peru S.A. Peru Dailey Environmental Remediation Technologies, Inc. Texas Dailey IDS Limited U.K. Dailey International Sales Corporation Delaware Design Engineering Limited U.K. Directional Wireline Engineering Services (Nigeria) Limited Nigeria Downhole Technology Limited U.K. Drill Stem Testers, Inc. USA DST, Inc. USA e(2) Tech Limited U.K. EMI-ElettroMagnetica Ispezioni Italia S.r.l. Italy Energy Ventures (Cyprus) Ltd. Cyprus Energy Ventures Far East Limited Hong Kong Enterra (U.K.) Limited U.K. Enterra International Limited U.K. Enterra Oilfield Rentals Limited Hong Kong Enterra Patco Oilfield Products, Inc. Texas Enterra Rental and Fishing Company Delaware eProduction Solutions U.K. Ltd. U.K. eProduction Solutions, Inc. Texas European Material Inspection (EMI) B.V. Netherlands EVI (Barbados), SRL Barbados EVI de Venezuela, S.A. Venezuela EVI Weatherford, Inc. Delaware Expio Limited U.K. Fiberspar Linepipe LLC Delaware Fishing Services Limited U.K. Gas Services International (Aust) Pty. Limited Australia Gas Services International (S) Pte. Ltd. Singapore Gas Services International Limited British Virgin Islands General Pipe Service Bolivia S.R.L. Bolivia General Pipe Service, Inc. Panama Global Air Drilling Services Ltd. Alberta Houston Well Screen Asia Pte. Ltd. Singapore Houston Well Screen Company Texas Independent Integrated Services Limited U.K. International Nitrogen Services Canada Ltd. Alberta International Nitrogen Services LLC Delaware International Petroleum Equipment Limited U.K. International Petroleum Equipment Norge A/S Norway International Petroleum Services, Inc. Delaware J. D. Investments Bonaire N.V. Netherlands Antilles Johnson Filtration Systems SAS France Johnson Screens (Australia) Pty Ltd Australia Johnson Screens (India) Limited India Johnson Screens Japan Limited Japan Johnson Screens Ltda. Brazil Johnson Screens Venezuela, C.A. Venezuela Johnson Screens, Inc. Delaware Keltic Oil Tools Limited U.K. Kendle Engineering (Asia) Pte. Limited Singapore Kobe International Ltd. Bahamas Kopp International Pipeline Services L.L.C. Oman McAllister Petroleum Services (Cyprus) Limited Cyprus McMurry-Macco (UK) Limited U.K. Mid-Europe Supply Limited U.K. Morrison McLean Associates Limited U.K. Multi Operational Service Tankers Inc. (Panama) Panama Niagara Screen Products Limited Ontario Offshore Rentals Deutschland GmbH Germany Offshore Rentals Dubai LLC U.A.E. Offshore Rentals Limited U.K. Offshore Rentals Norge A/S Norway Oil Field Rental Holdings Limited U.K. OilPatch Enterprises Internacional, S.A. de C.V. Mexico Oilwell Production Services Limited U.K. OptoPlan A.S. Norway Orwell Group De Venezuela C.A. Venezuela Orwell Group Limited U.K. Petco Fishing & Rental Tools (UK) Limited U.K. Petroline Wellsystems Limited U.K. Pipetest Service Sp.Zo.o. Poland Powell Engineering Company Limited U.K. Powerflo Rentals (Dubai) LLC U.A.E. Powerflo Rentals Limited U.K. Powerflo Rentals Norge A/S Norway Powerflo Systems Limited U.K. PowerGEN Rentals Limited U.K. PT AS/Johnson Screens (JV) Sdn Bhd Brunei PT Gas Services Indonesia Indonesia PT Hawes Utama Indonesia Indonesia PT Weatherford Indonesia Indonesia PT Wira Insani Indonesia Pump Rentals (International) Limited U.K. Pyrosul International Inc. Alberta Quality Commissioning Limited U.K. Quality Machining Services Limited U.K. R.S.T. Projects Limited U.K. Recovery Systems Limited U.K. Schoeller-Bleckmann Motovilithinskije Sucker Rod Gmbh Austria Shengli-Highland Company Ltd. China Signa Engineering Corp. Texas Specialty Testing & Consulting Ltd. Alberta Stealth Oil & Gas, Inc. Delaware Subsurface Technology AS Norway SubTech, LLC Delaware Tank Rentals Limited U.K. Tech Line Oil Tools Inc. Delaware Techcorp Industries International, Inc. Barbados Teco Maskinering AS Norway TUBAFOR MAROC S.A.R.L. Morocco Universal Compression Holdings, Inc. Delaware Van der Horst U.S.A., Inc. Delaware Venstar, Inc. Delaware W1 General Partner, Inc. Delaware W1 Receivables, L.P. Texas Weatherford (B) Sdn. Bhd. Brunei Weatherford (Cyprus) Limited Cyprus Weatherford (Malaysia) Sdn. Bhd. Malaysia Jt. Venture Weatherford (Saudi Arabia) Ltd. Saudi Arabia Jt. Venture Weatherford Aarbakke AS Norway Weatherford Abu Dhabi, Ltd. Cayman Islands Weatherford Artificial Lift Systems Canada Ltd. Alberta Weatherford Artificial Lift Systems, Inc. Delaware Weatherford Asia Pacific Pte. Ltd. Singapore Weatherford Australia Holding Pty. Limited Australia Weatherford Australia Pty. Ltd. Australia Weatherford Bermuda Holdings Ltd. Bermuda Weatherford Bin Hamoodah - L.L.C. Abu Dhabi Jt. Venture Weatherford Canada Ltd. Alberta Weatherford Canada Partnership Alberta Weatherford Colombia Ltd. British Virgin Islands Weatherford Completion Systems (UK) Limited U.K. Weatherford Completion Systems de Venezuela, S.A. Venezuela Weatherford de Mexico S.A. de C.V. Mexico Weatherford del Peru S.R.L. Peru Weatherford DIS Manufacturing (UK) Limited U.K. Weatherford Drilling and Production Services (India) Private Limited India Weatherford Drilling Services, Inc. Texas Weatherford East Europe Service GmbH Germany Weatherford Ecuador S.A. Ecuador Weatherford Equipment (Cyprus) Limited Cyprus Weatherford Eurasia B.V. Netherlands Weatherford Eurasia Limited U.K. Weatherford Financing (Luxembourg) S.a.r.l. Luxembourg Weatherford Foreign Sales Corporation Barbados Weatherford France SAS France Weatherford Hoevelaken Netherlands Weatherford Holding (Gibraltar) Limited Gibraltar Weatherford Holding GmbH Germany Weatherford Industria e Comercio Ltda. Brazil Weatherford International de Argentina S.A. Argentina Weatherford International, Inc. Delaware Weatherford Investment (Gibraltar) Limited Gibraltar Weatherford Investment (Luxembourg) S.a.r.l. Luxembourg Weatherford Kazakhstan Limited Liability Partnership Kazakhstan Weatherford Kopp GmbH Germany Weatherford KSP Company Limited Thailand Weatherford Latin America, Inc. Panama Weatherford Latin America, S.A. Venezuela Weatherford Limited Partner, L.L.C. Delaware Weatherford Liquidity Management Hungary Limited Liability Company Hungary Weatherford Luxembourg S.a.r.l. Luxembourg Weatherford Management, Inc. Delaware Weatherford Mediterranea S.p.A. Italy Weatherford New Zealand Limited New Zealand Weatherford Nigeria Limited Nigeria Weatherford Norge A/S Norway Weatherford North Atlantic Limited Gibraltar Weatherford Oil Tool GesmbH Austria Weatherford Oil Tool GmbH Germany Weatherford Oil Tool Middle East Limited British Virgin Islands Weatherford Oil Tool Nederland B.V. Netherlands Weatherford Oilfield Equipment (Shanghai) Co., Ltd. China Weatherford Oilfield Equipment (Tianjin) Limited China Weatherford Overseas Products, Ltd. Cayman Islands Weatherford Overseas Services, Ltd. Cayman Islands Weatherford Receivables, LLC Delaware Weatherford Services, Ltd. Bermuda Weatherford Services, S.A. Panama Weatherford Shanghai Investment Co. Delaware Weatherford Solutions Sdn. Bhd. Malaysia Weatherford Technical Services Limited British Virgin Islands Weatherford Trinidad Limited Trinidad Weatherford U.K. Limited U.K. Weatherford U.S. Holdings, L.L.C. Delaware Weatherford U.S., L.P. Louisiana Weatherford Well Screen Ireland Limited Ireland Weatherford/Al-Rushaid Co. Ltd. Saudi Arabia Jt. Venture Weatherford/Lamb, Inc. Delaware WellCat Services International, LLC Texas Wellserv Limited U.K. West Coast International Oilfield Rentals, B.V. Netherlands WEUS Holding, Inc. Delaware WI Products & Equipment, Inc. Cayman Islands WII Rental Company Delaware WUS Holding, L.L.C. Delaware