China Oilfield Services

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China Oilfield Services Limited
中海油田服务股份有限公司

Company type	State-owned enterprise
Traded as	(SEHK: 2883,SSE: 601808)
Industry	Oil exploration and Oil drilling
Founded	2001
Headquarters	Beijing , China
Area served	China
Key people	Fu Chengyu (Chairman)
Parent	CNOOC
Website	China Oilfield Services Limited

China Oilfield Services (COSL) is an oilfield services company. It is a majority owned subsidiary of Chinese state owned company CNOOC Group.^[1] It also has a listed sister company in Hong Kong, CNOOC Limited.

China Oilfield Services usually purchases off shore vessels (OSVs) and operates them in Southeast Asia, the Middle East and Central Asia in off shore projects of CNOOC. It also operates in Indonesia, Malaysia and the Caspian Sea.