China National Offshore Oil Corp

No. 25 Chaoyangmenbei Dajie
Dongcheng District
Beijing,  100010

86-10-8452 1113
86-10-6460 2847
  • Booth: 4661

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CHINA NATIONAL OFFSHORE OIL CORP. has a specialized technical service system which focuses on offshore oil and gas exploration and development and covers extensive fields. China Oilfield Services Limited (COSL), Offshore Oil Engineering Co., Ltd. (COOEC) and CNOOC Energy Technology & Services Limited (CNOOC EnerTech) are the subsidiaries of CNOOC.

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