Tianhe Petroleum Machinery Joint-Stock Co., Ltd was established in 1973, a leading manufacturer and supplier of petroleum machinery equipment and tools, in China . having three subsidiary namely . Huifeng Petroleum drilling tools Co., Ltd and Changqing Petroelum Machinery Co., Ltd and Beijing Tianshijiaye Energy Technology Co., Ltd. The main products include: Drill Collar, HW Drill Pipe, Hydraulic Bucking Units, Stabilizer, Shock Absorbers, Fishing Tools, Cemening Tools, Workover Tools, Milling Tools etc. By 2008 we have extended our market to several countries including USA, Russia , India , Middle east, North America with sales of 200 million yearly .In the meanwhile , Tianhe has been granted the member of council of CNPC .Officially become a reputable supplier for CNPC , ETC . Tianhe Petroleum machinery Co., Ltd has established a complete quality control system, already passed the certification of ISO9001:2000 and got the monogram use authority of API Spec7, 6D. We would like to cooperate with friends at domestic and abroad for mutual development.