COSL Chemicals (Tianjin) Co., Ltd., was established in Sept. 1993, a joint venture supported by Bohai Company,China National Offshore Oil Corporation(BOC,CNOOC) and China Oilfield Services Limited(COSL), both of which administered by The China National Offshore Oil Corporation (CNOOC). In Sept. 2006, with shares acquired by COSL, it has become the wholly owned company of COSL, and high-tech enterprises including research and development, produce and sales. Currently the company is located in the Yang Bei Road Bohai oil base,Tanggu District of Tianjin, it covers an area of 14,560 square meters, the registered capital is 9 million RMB. It has a number of advanced production lines of chemical products, producing oil professional chemicals with independent intellectual property such as mud c..