Dongying Dayang Petroleum Equipment Co.,Ltd is a manufacture with more than 25 years experience in china, specialized in producing Drilling Rigs and Drilling Parts such as Casing and Tubing, Drill Pipe, Pumping Units, Drawwoks, BOP, Mud Pump,Wellheads and so on. We have obtained the certificates of ISO9001:2008,API, GOST and possessed a quality control systerm.