COSL (China Oilfield Services Limited Chemicals) is a national high-tech enterprise integrating with R & D and production & sales, and which specializes in production and manufacturing of functional chemicals which have imperative use during processes of oil exploration, development and production. Currently, COSL Chemicals (Tianjin), Ltd. has over 40 kinds of functional products which cover the fields of drilling and completion, cementing and acid stimulation, are widely applied in all sea waters of CNOOC, CNPC, Sinopec and other none-oilfield markets, as well as international markets such as the markets in Indonesia, Iraq, India, and Oman.