COSL provides functionalized chemical products used in the course of oil-gas exploration, development and production to clients. It has a powerful research institute and technical team, more than ten patents of oilfield chemicals, professional chemical processing manufacturing factory, equipment and technicians, and has a perfect chemical quality, safety and environmental protection management system, and has passed DNV (DET NORSKE VERITAS) system certification. It provides service always in conformity with a corporate culture “we must do better” and corporate behavior rule “do everything heart and soul”, and provides good-quality and top-quality service to new and old clients wholeheartedly. COSL provides the clients with such series of products as drilling fluid additive, completion fluid additive and production increase and injection increase additives, etc.

Drilling fluid additive and completion fluid additive mainly cover: