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
Advanced Syngas Technologies		Alberta
Advantage R&D, Inc.		Delaware
Aim Oil Tools, Inc.		Texas
Air Drilling Services de Venezuela, C.A.		Venezuela
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
AO Kompaniya Geofizicheskiye Issledovaniya Skvazhin		Kazakhstan
Applied Petroleum Technology A.S.		Norway
Applied Petroleum Technology (UK) Ltd.		U.K.
Aquatic Company		Russia
Aquatronic Limited		U.K.
Artex Bolivia S.A.		Bolivia
Artex de Venezuela C.A.		Venezuela
Artex S.A.		Argentina
Astec Developments Limited		U.K.
Auslog Pty.Ltd.		Australia
Australian Logging Services, Ltd.		Australia
Australian Technical Solutions Pty, Ltd.		Australia
B. D. Kendle Engineering Limited		U.K.
Bakke Oil Tools AS		Norway
Bakke Technology AS		Norway
BBL Aust. Pty Ltd		Australia
BBL Downhole Tools Limited		U.K.
BFG Investments Ltd.		British Virgin Islands
Brit Bit Limited		U.K.

NAME	JURISDICTION
Calumet Petroleum Services, S.A.		Venezuela
Cardium International Limited		Hong Kong
Cardium Investments (Barbados) Limited		Barbados
Cardium Tool International Limited		Barbados
Case Services, Inc.		Texas
Clearwater International, L.L.C.		Delaware
Colombia Petroleum Services Corp.		Delaware
Columbia Oilfield Supply, Inc.		Delaware
Communication Rentals Limited		U.K.
Compania Construction Perforadora y de Estudios GEOS, S.A. de C.V.		Mexico
Contra-Shear Separation Technologies Limited		New Zealand
CRC-Evans Automatic Welding, Inc.		Texas
CRC-Evans Holland B.V.		Netherlands
CRC-Evans Pipeline International (UK) Limited		U.K.
CRC-Evans Services Limited		U.K.
CTC-Empresa Tecnina e Comercial de Equipamentos Ltda.		Brazil
Dailey de Venezuela, S.A.		Venezuela
Dailey IDS Limited		U.K.
Dailey International Sales Corporation		Delaware
Daquing Computalog Rainbow Geotechnical Development Corp. Ltd.		China
Desert Asset Holdings, Inc.		British Virgin Islands
Desert Rig Operations, Inc.		Cayman Islands
Design Engineering Limited		U.K.
Directional Wireline Engineering Services (Nigeria) Limited		Nigeria
Dongying Shengli-Highland Company Ltd.		China
Downhole Technology Limited		U.K.
Drilling Research & Development Corporation		Texas
DSK, Inc.		Colorado
e2 Tech Limited		U.K.
Edinburgh Petroleum Equipment Limited		U.K.
Edinburgh Petroleum Services Americas Incorporated		Texas
Edinburgh Petroleum Services de Mexico S.A. de C.V.		Mexico
Edinburgh Petroleum Services de Venezuela, C.A.		Venezuela
Edinburgh Petroleum Services Limited		U.K.
EMI-ElettroMagnetica Ispezioni Italia S.r.l.		Italy
Emirates Link Reslab (El Reslab LLC) Limited Liability Company		U.A.E.
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

NAME	JURISDICTION
eProduction Solutions U.K. Ltd.		U.K.
eProduction Solutions, Inc.		Texas
EPS Resources S.A. de C.V.		Mexico
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.
Fishing Services Limited		U.K.
Fleet Cementers, Inc.		Texas
Gabas Omni Petroleum Services Ltd.		Saudi Arabia
Gem-Trim, L.L.C.		Louisiana
General Pipe Service Bolivia S.R.L.		Bolivia
Global Air Drilling Services Ltd.		Alberta
Helix Equipment Leasing Limited		British Virgin Islands
High Pressure Integrity, Inc.		Louisiana
Houston Well Screen Asia Pte. Ltd.		Singapore
Houston Well Screen Company		Texas
Huellas Oilfield Equipment & Services, Inc.		Delaware
Hunter Road I GP, LLC		Texas
Hunter Road I, LP		Texas
Hunter Road II GP, LLC		Texas
Hunter Road II, LP		Texas
Hunter Road Medical Plaza, L.P.		Texas
Hunter Road Medical Plaza Management, L.L.C.		Texas
Hycal Energy Research Laboratories Ltd.		Alberta
ICR Poliuretanos y Gomas S.A.		Chile
Independent Integrated Services Limited		U.K.
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, Inc.		Delaware
Keltic Oil Tools Limited		U.K.
Kenting Drilling APS		Denmark
Key International Drilling Company Limited		Bermuda
Kobe International Ltd.		Bahamas

NAME	JURISDICTION
Kopp International Pipeline Services and Partners L.L.C.		Oman
Land Drilling Asset Holdings, Inc.		British Virgin Islands
Linkbird Limited		Cyprus
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
Offshore Rentals Deutschland GmbH		Germany
Offshore Rentals Limited		U.K.
Oil Field Rental Holdings Limited		U.K.
Oilfield Machine Shop and Inspection Services Company		Algeria
OilPatch Enterprises Internacional, S.A. de C.V.		Mexico
Oilwell Production Services Limited		U.K.
Olanderano Commercial, Servicing and Liquidity Management Limited Liability Company		Hungary
Omni Laboratories de Venezuela, C.A.		Venezuela
Omni Laboratories do Brasil Limitada		Brazil
Omni Laboratories of Canada, Inc.		Nova Scotia
Omni Laboratories of Trinidad Limited		Trinidad and Tobago
Omni Laboratories, Inc.		Texas
OOO Techinformservice		Russia
Orwell Group De Venezuela C.A.		Venezuela
Orwell Group Limited		U.K.
P.D. Drilling Holdings Inc.		Barbados
P.D. Technical Services Inc.		Barbados
PD Chicontepec, S. de R.L. de C.V.		Mexico
PD Global Employment Corporation		Alberta
PD Holdings (USA) L.P.		Delaware
PD Holdings Mexicana S. de R.L. de C.V.		Mexico
PD International Leasing Inc.		Barbados
PD International Services Inc.		Alberta
PD International, LLC		Texas
PD Mexicana, S. de R.L. de C.V.		Mexico
PD Oilfield Services Mexicana, S. de R.L. de C.V.		Mexico
PD Technical Services Mexicana, S. de R.L. de C.V.		Mexico
Petco Fishing & Rental Tools (UK) Limited		U.K.
Petroline Wellsystems Limited		U.K.
Pipetest Service Sp.Zo.o.		Poland
Polar Completions (U.S.) Inc.		Delaware
Powell Engineering Company Limited		U.K.
Powerflo Rentals (Dubai) LLC		U.A.E.
Powerflo Rentals Limited		U.K.
Powerflo Rentals Norge A/S		Norway

NAME	JURISDICTION
Powerflo Systems Limited		U.K.
PowerGEN Rentals Limited		U.K.
Precision do Brasil Servicos de Energia Ltda.		Brazil
Precision Drilling (Cyprus) Limited		Cyprus
Precision Drilling (Egypt) LLC		Egypt
Precision Drilling de Venezuela Caracas, C.A.		Venezuela
Precision Drilling de Venezuela, C.A.		Venezuela
Precision Drilling GP, Inc.		Delaware
Precision Drilling Holdings, Inc.		Delaware
Precision Drilling International (Australia) Pty. Ltd.		Australia
Precision Drilling International B.V.		Netherlands
Precision Drilling LP, Inc.		Delaware
Precision Drilling Services (Australia) Pty. Ltd.		Australia
Precision Drilling Services (Malaysia) Sdn. Bhd.		Malaysia
Precision Drilling Services (Netherlands) B.V.		Netherlands
Precision Drilling Services (Oman) & Co. LLC		Oman
Precision Drilling Services (Thailand) Ltd.		Thailand
Precision Drilling Services (UK) Ltd.		U.K.
Precision Drilling Services Algeria EURL		Algeria
Precision Drilling Services Argentina S.A.		Argentina
Precision Drilling Services M.E. W.L.L.		United Arab Emirates
Precision Drilling Services Saudi Arabia Ltd.		Saudi Arabia
Precision Drilling Technology Services Group (USA) Inc.		Delaware
Precision Energy International Ltd.		Alberta
Precision Energy Services (Australia) Pty. Limited		Australia
Precision Energy Services (Barbados) Ltd.		Barbados
Precision Energy Services (BVI) Ltd.		British Virgin Islands
Precision Energy Services (Cyprus) Limited		Cyprus
Precision Energy Services (New Zealand) Limited		New Zealand
Precision Energy Services (Singapore) Pte. Ltd.		Singapore
Precision Energy Services CIS		Russia
Precision Energy Services Colombia Ltd.		Alberta
Precision Energy Services Saudi Arabia Ltd.		Saudi Arabia
Precision Energy Services ULC		Alberta
Precision Energy Services, Inc.		Delaware
Precision Holdings (UK) Limited		U.K.
Precision Middle East Holding Ltd.		British Virgin Islands
Precision Oilfield Services, LLP		Texas
Precision Pacific Holding (BVI) Ltd.		British Virgin Islands
Precision USA Holdings, Inc.		Delaware
Premiere Business Solutions Limited		Seychelles
Project Management Services, S. de R.L. de C.V.		Mexico
PT Hawes Utama Indonesia		Indonesia

NAME	JURISDICTION
PT Precision Energy Services (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.
Reeves Oilfield Services Ltd.		U.K.
Reeves Wireline Investments Limited		U.K.
Reeves Wireline Services Limited		U.K.
Reeves Wireline Services Limited u. Co. GmbH		Germany
Reeves Wireline Technologies Limited		U.K.
ResLab Integration AS		Norway
ResLab Malata Ltd.		Malta
ResLab North Africa Ltd.		Malta
ResLab Reservoir Laboratories A.S.		Norway
ResLab Reservoir Laboratories & Company LLC		Oman
ResLab Trinidad & Tobago S.A. de C.V.		Trinidad
ResLab UK Ltd.		United Kingdom
Richdear Holdings Limited		Cyprus
Rig Transport International (BVI) Ltd.		British Virgin Islands
Screenex Manufacturing (Proprietary) Limited		South Africa
Servicios Petroleros Equipat S.A.		Argentina
SETAC S.A.		Chile
Seven Energy (Belgium) BVBA		Belgium
Seven Energy (Hong Kong) Limited		Hong Kong
Seven Energy LLC		Delaware
Sicom AS		Norway
Signa Engineering Corp.		Texas
Smart Stabilizer Systems Limited		U.K.
Solintec Services de Petroleo Ltda.		Brazil
Specialty Testing & Consulting Ltd.		Alberta
Stealth Oil & Gas, Inc.		Delaware
Subsurface Technology AS		Norway
Sunbreeze Limited		Cyprus
Sunita Hydrocolloids Private Ltd.		India
Talleres de Precision del Chubut S.A.		Argentina
Tank Rentals Limited		U.K.
Tech Line Oil Tools Inc.		Delaware
Techcorp Industries International, Inc.		Barbados
Teco Maskinering AS		Norway
“Teress Properties” Limited Liability Company		Azerbaijan

NAME	JURISDICTION
TUBAFOR MAROC S.A.R.L.		Morocco
TubeFuse Applications LLC		Delaware
TubeFuse Technologies Limited		U.K.
United Precision Drilling Company		Kuwait
Valkyrie Commissioning Services, Inc.		Texas
Valkyrie de Mexico S. de R.L. de C.V.		Mexico
Valkyrie Services S. de R.L. de C.V.		Mexico
Van der Horst U.S.A., Inc.		Delaware
Visean Information Services Inc.		Texas
Visean Information Services Pty Ltd		Australia
Warrior Well Services, Inc.		Illinois
Weatherford (B) Sdn. Bhd.		Brunei
Weatherford (Cyprus) Limited		Cyprus
Weatherford (G.B.) LLP		U.K.
Weatherford (Malaysia) Sdn. Bhd.		Malaysia
Weatherford (Novia Scotia) ULC		Novia Scotia
Weatherford (Saudi Arabia) Ltd.		Saudi Arabia
Weatherford (Sichuan) Petrochemical Equipment Co. Ltd.		China
Weatherford Aarbakke AS		Norway
Weatherford Abu Dhabi, Ltd.		Cayman Islands
Weatherford Al-Rushaid Co. Ltd.		Saudi Arabia
Weatherford Angola, Limitada		Angola
Weatherford Angola Services (BVI) Ltd.		British Virgin Islands
Weatherford Angola Wellscreen Applications Ltd.		British Virgin 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
Weatherford Canada Ltd.		Alberta
Weatherford Canada Partnership		Alberta
Weatherford Chisholm Trail Holding, LLC		Texas
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 Deutsche Holding (Canada) ULC		Alberta
Weatherford DIS Manufacturing (UK) Limited		U.K.
Weatherford Drilling International (Australia) Pty. Ltd.		Australia
Weatherford Drilling International (BVI) Ltd.		British Virgin Islands

NAME	JURISDICTION
Weatherford Drilling and Production Services (India) Private Limited		India
Weatherford East Europe Service GmbH		Germany
Weatherford Ecuador S.A.		Ecuador
Weatherford Energy Services Hungary Limited Liability Company		Hungary
Weatherford Energy Services Gmbh		Germany
Weatherford Equipment (Cyprus) Limited		Cyprus
Weatherford Eurasia B.V.		Netherlands
Weatherford Eurasia Limited		U.K.
Weatherford Financing (Cyprus) Limited		Cyprus
Weatherford Financing (Luxembourg) S.a.r.l.		Luxembourg
Weatherford France SAS		France
Weatherford Global Products Limited		Cyprus
Weatherford Holding (Gibraltar) Limited		Gibraltar
Weatherford Holding (Ireland) Company		Ireland
Weatherford Holding (Luxembourg) S.a.r.l.		Luxembourg
Weatherford Holding B.V.		Netherlands
Weatherford Holding GmbH		Germany
Weatherford Holding Middle East Ltd.		British Virgin Islands
Weatherford Holdings (BVI) Ltd.		British Virgin Islands
Weatherford Holdings (Cyprus) Limited		Cyprus
Weatherford Holdings (Singapore) Pte. Ltd.		Singapore
Weatherford Holdings U.K. Ltd.		U.K.
Weatherford Hong Kong Holdings Limited		Hong Kong
Weatherford IDS USA, Inc .		Delaware
Weatherford Industria e Comercio Ltda.		Brazil
Weatherford International de Argentina S.A.		Argentina
Weatherford International del Peru S.A.		Peru
Weatherford International Eastern Europe SRL		Romania
Weatherford International, Inc.		Delaware
Weatherford Investment (Gibraltar) Limited		Gibraltar
Weatherford Investment (Luxembourg) S.a.r.l.		Luxembourg
Weatherford Investments Holding B.V.		Netherlands
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 LLC		Russia
Weatherford Luxembourg S.a.r.l.		Luxembourg
Weatherford Management, Inc.		Delaware
Weatherford Mauritius Holdings Ltd.		Mauritius

NAME	JURISDICTION
Weatherford Mediterranea S.p.A.		Italy
Weatherford ME Holdings Ltd.		British Virgin Islands
Weatherford New Zealand Limited		New Zealand
Weatherford Nigeria Limited		Nigeria
Weatherford Norge A/S		Norway
Weatherford North Atlantic Limited		Gibraltar
Weatherford O.R. Limited		U.K.
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 Pipeline Services Espana, S.L.		Spain
Weatherford Product & Leasing (BVI) Limited		British Virgin Islands
Weatherford Services, Ltd.		Bermuda
Weatherford Services, S.A.		Panama
Weatherford Solutions Sdn. Bhd.		Malaysia
Weatherford South America, Inc.		Panama
Weatherford Syngas Investments Ltd.		Alberta
Weatherford Technical Services Limited		British Virgin Islands
Weatherford Trinidad Limited		Trinidad
Weatherford Tubefuse B.V.		Netherlands
Weatherford U.K. Limited		U.K.
Weatherford U.S. Holdings, L.L.C.		Delaware
Weatherford U.S. Investment, LLC		Delaware
Weatherford U.S., L.P.		Louisiana
Weatherford Unidades de Bombeio Ltda.		Brazil
Weatherford Well Screen Ireland Limited		Ireland
Weatherford/Lamb, Inc.		Delaware
WellCat Services International, LLC		Texas
Wellserv Limited		U.K.
WESP		Algeria
West Coast International Oilfield Rentals, B.V.		Netherlands
WEUS Holding, Inc.		Delaware
WFT Technologies, LLC		Russia
WI Products & Equipment, Inc.		Cayman Islands
WII Rental Company		Delaware
WUS Holding, L.L.C.		Delaware
ZAO Aquatic-Samara		Russia

NAME	JURISDICTION
ZAO Neftegazkomplectservice		Russia
Zibo Hongyang Weatherford Oilfield Equipment Co. Ltd.		China
Zimec Ltda.		Brazil
Zonebrook Limited		Cyprus
Zonecrest Limited		Cyprus
Zuidzuidoost Investments B.V.		Netherlands