Shanxi Golden Diamond Petroleum Drill Tools Manufacturing Co., LTD was founded in 2006 and it specializes in the manufacture of petroleum drill tools. Based in Jinzhong Economic and Technical Development Zone, Shanxi, the company is close to Taiyuan Airport and at easily accessible location. We have domestic as well as specialized equipments and auxillary equipments. we have expert staff to cater the industry with their innovative ideas and vast knowledgebase. we also have affiliation with experts and professors of China University of Petroleum, Taiyuan University of Technology, and CNPC Tubular Goods Research Institute (TGRC) for special technical assistance and services for product developements. Our products are API Spec7-1 and 5DP certified and also ISO9001ï¼?2000 certified. We have thorough test and inspection methods such as chemical composition analysis of the material, mechanical performance test of the components, UT, geometrical and dimensional inspection of the products to make sure that quality is maintained through out the manufacturing and machining processes. Our leading products are drill collars (type A, type B and type C), HWDP, kelly, petroleum casing pipes, all kinds of friction welding drill pipes, geological pipes, all kind of drilling tool joints, lifting subs and trenchless drilling tool, etc. We have solid technical force, so besides the standrad products we can design special drill tools that can cater your customized and special production requirements. The company adopts American ARNCO hardbanding welding technology, drilling tool internal coating technology, thread cold rolling technology and professional drill tool manufacture technology that prevents H2S corrosion. Besides, we have thorough after-sales service system, providing not only the service and consultation in drilling machine and tool quality, but also the technology service and support in petroleum drilling process to minimize the manufacture risk.