Taiyuan Simis Investment Casting Co., Ltd, located in Shanxi Province, specializing in the manufacture of petroleum drill tools. The company is close to Taiyuan railway station at easily accessible locations. We have domestic-advanced specialized equipments and auxiliary equipments. Our products are API Spec7-1 certified and also ISO9001ï¼2000 certified. We have thorough test and inspection methods such as chemical composition analysis of the material, mechanical performance test of the half-finished, UT and geometric dimensioning inspection of the products to make sure that the manufature and machining during all the process can meet the quality requirements. 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 meet drilling process requiments according with your actual production needs. We scrupulously abides by honesty and trustworthiness of Shanxi merchants tradition, manufacturing first class product and providing first class service. Our aim is to win the trust of the domestic and overseas customers. Insisting on seeking development with science and technology and survivingon high quality, Simis Investment Casting Company honestly welcome internal and external clients to cooperate with us.