| China National offshore Oil Corporation (CNOOC) |
CNOOC(China) Limited-Shenzhen (CCLS) |
CNOOC(China) Limited-Zhanjiang (CCLZ) |
CNOOC Offshore Oil Engineering Co., Ltd.(COOEC) |
| China Oilfield Services Limited (COSL) |
Husky Oil China Ltd. |
Chevron Energy China Co., Ltd. |
Devon Energy China Co., Ltd. |
| Newfield China LDC. |
British Gas International Co., Ltd. (BG) |
Transocean |
Seadrill |
| Pioneer Drilling Co., Ltd. |
Cyprus Songa Offshore Oil Drilling Co., Ltd. |
Saipem (Portugal) Marine Engineering & Commercial Co., Ltd. |
Global Industries Asia-Pacific Co., Ltd. |
