On the basis of the highest requirements of safety, top quality and efficiency of the clients, COSL provides comprehensive integrated solution to drilling and completion fluids, covering technology of drilling and completion fluids, solid control, drilling waste management, hydraulics engineering software support system and oilfield chemical production and sales. The strong institute of drilling and completion fluids has a whole set of R&D system which conforms to API standards for lab testing and wellsite technical developing. COSL aims at becoming a service provider for drilling and completion fluids advanced internationally to provide clients with differential and customized services.