What does COSL mean?

China Offshore Oil Service Co., Ltd. ("COSL", "COSL" or "COSL") is the largest comprehensive oilfield service provider in China offshore market, and it is affiliated to China Offshore Oil Corporation (CNOOC). Services run through all stages of offshore oil and gas exploration, development and production. Business is divided into four categories: geophysical prospecting services, drilling services, oilfield technical services and ship services. COSL publicly issued H shares +065438+ on June 20, 2002 and listed on the main board of the Hong Kong Stock Exchange with the stock number of 2883. Since March 26th, 2004, COSL's shares have been traded on the OTC market in the United States in the form of first-class American Depositary Receipts, and the stock number is CHOLY. COSL was listed on the Shanghai Stock Exchange on September 28th, 2007. A-share stock is called cosl for short, and the stock number is 60 1808.