COSL provides customers more than 40 kinds of functional chemicals cover drilling, cementing and acidizing, and are widely used in the offshore oil, PetroChina, Sinopec and other non oil fields, as well as foreign markets such as Indonesia, Iraq, India, Oman and so on, and play an important role in oil field exploration, development and production. COSL has R&D center and technical team specializing in the research and manufacturing the functional chemicals used in oil exploration, development and production. COSL has the DNV certified QHSE management system.