Exhibit 21.1



BJ SERVICES COMPANY

SUBSIDIARIES



|                                                    |  |                             |  |                
|--------------------------------------------------- |  | --------------------------- |  | ---------------
|NAME OF ENTITY                                      |  | JURISDICTION OFORGANIZATION |  | PERCENTAGEOWNED
|BJ SERVICES COMPANY                                 |  | Delaware                    |  |                
|ASPAC REGION PTE. LTD.                              |  | Singapore                   |  | 100%           
|B.J. PETROLEUM SERVICES INTERNATIONAL LIMITED       |  | Cyprus                      |  | 100%           
|BIARRITZ OVERSEAS LIMITED                           |  | Cyprus                      |  | 100%           
|BJ - ROTARY PETROLEUM SERVICES COMPANY LIMITED (JV) |  | Hungary                     |  | 64%            
|BJ CANADA TECHNICAL SERVICES LIMITED                |  | Cyprus                      |  | 100%           
|BJ OILFIELD SERVICES COMPANY (BEIJING) LIMITED      |  | China                       |  | 100%           
|BJ COMPLETION SERVICES DO BRASIL LTDA               |  | Brazil                      |  | 100%           
|BJ HOLDINGS (RUSSIA) LIMITED                        |  | Cyprus                      |  | 100%           
|BJ OILWELL SERVICES (M) SDN. BHD. (JV)              |  | Malaysia                    |  | 65%            
|BJ PETROLEUM SERVICES (CHINA) LIMITED               |  | Cyprus                      |  | 100%           
|BJ PETROLEUM SERVICES LIMITED                       |  | England                     |  | 100%           
|BJ PROCESS & PIPELINE SERVICES PTE. LTD.            |  | Singapore                   |  | 100%           
|BJ PROCESS & PIPELINE SERVICES (AUSTRALIA) PTY LTD  |  | Australia                   |  | 100%           
|BJ PROCESS & PIPELINE SERVICES LIMITED              |  | England                     |  | 100%           
|BJ PROCESS AND PIPELINE SERVICES AS                 |  | Norway                      |  | 100%           
|BJ PROCESS AND PIPELINE SERVICES COMPANY            |  | Texas                       |  | 100%           
|BJ PROCESS AND PIPELINE SERVICES GmbH               |  | Germany                     |  | 100%           
|BJ PUMPING SERVICES COMPANY S.A. (JV)               |  | Panama                      |  | 65%            
|BJ QUIMICA DO BRASIL LTDA.                          |  | Brazil                      |  | 100%           
|BJ SECIM (SERVICOS-CIMENTO) de ANGOLA LIMITED (JV)  |  | Angola                      |  | 75%            
|BJ SERVICE ARABIA LIMITED (JV)                      |  | Saudi Arabia                |  | 70%            
|BJ SERVICE INTERNATIONAL (THAILAND) LTD.            |  | Thailand                    |  | 100%           
|BJ SERVICE INTERNATIONAL, INC.                      |  | Delaware                    |  | 100%           
|BJ SERVICES (GB) LIMITED                            |  | Scotland                    |  | 100%           
|BJ SERVICES (GIBRALTAR) LIMITED                     |  | Gibraltar                   |  | 100%           
|BJ SERVICES AS                                      |  | Norway                      |  | 100%           
|BJ SERVICES C.I., LTD.                              |  | Cayman Islands              |  | 100%           
|BJ SERVICES COMPANY (AUSTRALIA) PTY LTD             |  | Australia                   |  | 100%           
|BJ SERVICES COMPANY (HONG KONG) LIMITED             |  | Hong Kong                   |  | 100%           
|BJ SERVICES COMPANY (MAURITIUS) LTD                 |  | Republic of Mauritius       |  | 100%           
|BJ SERVICES COMPANY (NIGERIA) LIMITED (JV)          |  | Nigeria                     |  | 60%            
|BJ SERVICES COMPANY (SAKHALIN) LIMITED              |  | Russia                      |  | 100%           
|BJ SERVICES COMPANY (SINGAPORE) PTE. LTD.           |  | Singapore                   |  | 100%           
|BJ SERVICES COMPANY (UK) LIMITED                    |  | Scotland                    |  | 100%           
|BJ SERVICES COMPANY AFRICA LIMITED                  |  | Scotland                    |  | 100%           
|BJ SERVICES COMPANY B.V.                            |  | Netherlands                 |  | 100%           
|BJ SERVICES COMPANY CANADA                          |  | Nova Scotia                 |  | 100%           
|BJ SERVICES COMPANY FRANCE S.A.R.L.                 |  | France                      |  | 100%           
|BJ SERVICES COMPANY GmbH                            |  | Germany                     |  | 100%           
|BJ SERVICES COMPANY ITALIA S.R.L.                   |  | Italy                       |  | 100%           
|BJ SERVICES COMPANY LIMITED                         |  | Scotland                    |  | 100%           
|BJ SERVICES COMPANY MEXICANA S.A. DE C.V.           |  | Mexico                      |  | 100%           
|BJ SERVICES COMPANY MIDDLE EAST                     |  | Delaware                    |  | 100%           
|BJ SERVICES COMPANY MIDDLE EAST LIMITED             |  | Scotland                    |  | 100%           
|BJ SERVICES COMPANY S.a.r.l.                        |  | Luxembourg                  |  | 100%           
|BJ SERVICES COMPANY USA, L.P.                       |  | Delaware                    |  | 100%           
|BJ SERVICES COMPANY, S.A.                           |  | Panama                      |  | 100%           
|BJ SERVICES COMPANY, U.S.A.                         |  | Delaware                    |  | 100%           



---

BJ SERVICES COMPANY

SUBSIDIARIES



|                                                                               |  |                             |  |                
|------------------------------------------------------------------------------ |  | --------------------------- |  | ---------------
|NAME OF ENTITY                                                                 |  | JURISDICTION OFORGANIZATION |  | PERCENTAGEOWNED
|BJ SERVICES DE VENEZUELA, COMPANIA EN COMANDITA POR ACCIONES                   |  | Venezuela                   |  | 100%           
|BJ SERVICES DE VENEZUELA, LLC                                                  |  | Delaware                    |  | 100%           
|BJ SERVICES DO BRASIL LTDA                                                     |  | Brazil                      |  | 100%           
|BJ SERVICES EQUIPMENT II, L.P.                                                 |  | Delaware                    |  | 5%             
|BJ SERVICES EQUIPMENT, L.P.                                                    |  | Delaware                    |  | 5%             
|BJ SERVICES II, L.L.C.                                                         |  | Delaware                    |  | 100%           
|BJ SERVICES INTERNATIONAL B.V.                                                 |  | Netherlands                 |  | 100%           
|BJ SERVICES INTERNATIONAL LTD                                                  |  | England                     |  | 100%           
|BJ SERVICES INTERNATIONAL S.a.r.l.                                             |  | Luxembourg                  |  | 100%           
|BJ SERVICES INTERNATIONAL, S.A.                                                |  | Panama                      |  | 100%           
|BJ SERVICES OPERATING & MAINTENANCE COMPANY II, L.L.C.                         |  | Delaware                    |  | 100%           
|BJ SERVICES OPERATING & MAINTENANCE COMPANY, L.L.C.                            |  | Delaware                    |  | 100%           
|BJ SERVICES S.R.L.                                                             |  | Argentina                   |  | 100%           
|BJ SERVICES Y COMPANIA, SOCIEDAD EN COMANDITA POR ACCIONES DE CAPITAL VARIABLE |  | El Salvador                 |  | 100%           
|BJ SERVICES, L.L.C.                                                            |  | Delaware                    |  | 100%           
|BJ SERVICIOS INTERNATIONAL S.A. DE C.V.                                        |  | Mexico                      |  | 100%           
|BJ TUBULAR SERVICES A/S                                                        |  | Denmark                     |  | 100%           
|BJ TUBULAR SERVICES B.V.                                                       |  | Netherlands                 |  | 100%           
|BJ TUBULAR SERVICES LIMITED                                                    |  | Scotland                    |  | 100%           
|BJ USA, LLC                                                                    |  | Delaware                    |  | 100%           
|BJNEFT (CYPRUS) LIMITED                                                        |  | Cyprus                      |  | 100%           
|BJSC Holdings, LLC                                                             |  | Delaware                    |  | 100%           
|BJSC, L.P.                                                                     |  | Delaware                    |  | 100%           
|CAJUN TUBULAR SERVICES, INC.                                                   |  | Delaware                    |  | 100%           
|CANADIAN FRACMASTER OFFSHORE (CYPRUS) LIMITED                                  |  | Cyprus                      |  | 100%           
|CFC HOLDINGS INC.                                                              |  | Delaware                    |  | 100%           
|CFC PARTNER LLC                                                                |  | Delaware                    |  | 100%           
|CHALLENGE PIPELINE SERVICES PTY LTD                                            |  | Australia                   |  | 100%           
|CHEMFRAC TRADING LIMITED                                                       |  | Cyprus                      |  | 100%           
|COLONY DRILLING COMPANY LIMITED                                                |  | Scotland                    |  | 100%           
|COMPANIA DE SERVICIOS PETROLEROS BJ BOLIVIANA S.A.                             |  | Bolivia                     |  | 100%           
|FRACMASTER CONSULTANTS LIMITED                                                 |  | Cyprus                      |  | 100%           
|GULF WELL SERVICES COMPANY (JV)                                                |  | Kuwait                      |  | 40%            
|INTERNATIONAL CHEMICAL SPECIALITIES FZE                                        |  | Dubai                       |  | 100%           
|MCKENNA AND SULLIVAN LIMITED                                                   |  | England                     |  | 100%           
|NMS OILFIELD LIMITED                                                           |  | Cyprus                      |  | 100%           
|NOWSCO (NETH) GROUP B.V.                                                       |  | The Netherlands             |  | 100%           
|NOWSCO AMERICAS S.A.                                                           |  | Argentina                   |  | 100%           
|NOWSCO NORGE AS                                                                |  | Norway                      |  | 100%           
|NOWSCO WELL SERVICE (CYPRUS) LIMITED                                           |  | Cyprus                      |  | 100%           
|NOWSCO WELL SERVICE (VOSTOK) LIMITED                                           |  | Russia                      |  | 100%           
|NOWSCO-BJ SERVICES COMPANY (B) SDN BHD (JV)                                    |  | Brunei                      |  | 60%            
|OFS PORTAL, LLC (JV)                                                           |  | Delaware                    |  | 4.64%          
|OILFIELD CHEMICALS TRADING, LLC                                                |  | Delaware                    |  | 100%           
|OILFIELD EQUIPMENT RENTAL (L) BHD.                                             |  | Labuan                      |  | 100%           
|OILFIELD EQUIPMENT SERVICE LLC                                                 |  | Delaware                    |  | 100%           
|OSCA DE MEXICO S.A. DE C.V.                                                    |  | Mexico                      |  | 100%           



---

BJ SERVICES COMPANY

SUBSIDIARIES



|                                                                                          |  |                             |  |                
|----------------------------------------------------------------------------------------- |  | --------------------------- |  | ---------------
|NAME OF ENTITY                                                                            |  | JURISDICTION OFORGANIZATION |  | PERCENTAGEOWNED
|OSCA HOLDINGS UK LIMITED                                                                  |  | England                     |  | 100%           
|OSCA ITALIA S.R.L.                                                                        |  | Italy                       |  | 100%           
|OSCA LATIN AMERICA, INC.                                                                  |  | Delaware                    |  | 100%           
|OSCA U.K. LIMITED                                                                         |  | England                     |  | 100%           
|OSCA, INC.                                                                                |  | Delaware                    |  | 100%           
|P.T. BJ SERVICES INDONESIA (JV)                                                           |  | Indonesia                   |  | 75%            
|P.T. NOWSCO WELL SERVICE INDONESIA                                                        |  | Indonesia                   |  | 100%           
|P.T. WESTERN PETROLEUM SERVINDO                                                           |  | Indonesia                   |  | 100%           
|PD MEXICANA SOCIEDAD DE RESPONSABILIDAD LIMITADA DE CAPITAL VARIABLE (JV)                 |  | Mexico                      |  | 50%            
|POSEIDON TREASURY SERVICES LIMITED                                                        |  | Cyprus                      |  | 100%           
|PROJECT MANAGEMENT SERVICES SOCIEDAD DE RESPONSABILIDAD LIMITADA DE CAPITAL VARIABLE (JV) |  | Mexico                      |  | 50%            
|SAMOTLOR HOLDINGS LIMITED                                                                 |  | Cyprus                      |  | 100%           
|SARKU-NOWSCO WELL SERVICES SDN. BHD.                                                      |  | Malaysia                    |  | 100%           
|SEBEP QUIMICA INDUSTRIA E COMERCIO LTDA.                                                  |  | Brazil                      |  | 100%           
|SEBEX OIL WELL SERVICES S.A.                                                              |  | Uruguay                     |  | 100%           
|SERVICIOS O y M S.A. de C.V.                                                              |  | Mexico                      |  | 100%           
|SOCIETE ALGERIENNE DE STIMULATION DES PUITS PRODUCTEURS dHYDROCARBURES (BJSP) (JV)       |  | Algeria                     |  | 49%            
|SOCIETE DE SERVICES INDUSTRIELS (S.S.l.)(JV)                                              |  | France                      |  | 50%            
|THE WESTERN COMPANY OF NORTH AMERICA                                                      |  | Delaware                    |  | 100%           
|TOMSK HOLDINGS LIMITED                                                                    |  | Cyprus                      |  | 100%           
|UFM HOLDINGS LIMITED                                                                      |  | Cyprus                      |  | 100%           
|VERINDER HOLDINGS LIMITED                                                                 |  | Cyprus                      |  | 100%           
|WESTERN OCEANIC INTERNATIONAL, INC.                                                       |  | Panama                      |  | 100%           
|ZAO BJ SERVICES                                                                           |  | Russia                      |  | 100%           
|ZAO FRACMASTERNEFT                                                                        |  | Russia                      |  | 100%           
|ZAO SAMOTLOR FRACMASTER SERVICES                                                          |  | Russia                      |  | 100%