| 2008 |
September 29 |
China Oilfield Services Limited acquired Awilco Offshore ASA |
| 2007 |
September 28 |
China Oilfield Services Limited was listed on the Shanghai Stock Exchange |
| 2004 |
March 26 |
China Oilfield Services Limited, ticker symbol CHOLY, was authorized for trading via Level I Unlisted American Depositary Receipts (ADRs) for over-the-counter (OTC) marketing in the United States of America |
| 2002 |
November 20 |
China Oilfield Services, stock code 2883.HK, was listed on the main board of the Hong Kong Stock Exchange |
|
September 26 |
COSL was approved by the PRC Central Government, officially chartered by State Administration for Industry and Commerce, and structured as a joint stock limited liability company |
| 2001 |
December 29 |
CNOOC combined China Offshore Oil Southern Shipping Company and China Offshore Oil Northern Shipping Company, formerly two separate marine support and transportation subsidiaries, into one entity |
|
December 25 |
CNOOC integrated five PRC wholly-owned subsidiary companies into a single corporation, COSL, to provide its drilling, well, and geophysical services. The original five companies were China Offshore Oil Southern Drilling Company, China Offshore Oil Northern Drilling Company, China Offshore Geophysical Company Limited, China Offshore Logging Company Limited, and CNOOC Petrotech Services Company. |
| 1982 |
February 15 |
China National Offshore Oil Corporation (CNOOC) was established
as a PRC State-owned enterprise | |
