Shanxi Weigao Petroleum Drilling Tools Co., ltd, is a major and earliest supplier of petroleum drilling tools. WEIGAO Drilling tools are high quality products which meet the hardest operating conditions, including all kinds of drill collars, drill pipes, non-magnetic drill collars, integral heavy drill pipes, square and hexagonal kellys, lift subs, lift plugs, stabilizer and so on. Each products undergoes strict quality control, more than one hundred checks are made in the course of manufacturing. All mechanical properties meet or exceed the requirements of API. We have many kinds of high-precision manufacturing and inspection equipment: special numerical control pipe thread lathes, large cylindrical lathes, milling machine, deep hole boring machine, friction welding machine, medium frequency heat treatment production line, as well as variety of thread gauge, single measuring instruments, thickness gauges, hardness testers, ultrasonic flaw detectors, ballistic work testing machines, universal hydraulic testing machines with microcomputer display and so on. With sophisticated production equipment, strict inspecting method and strong technology strength, we have mastered the key technique in producing petroleum drilling tools, whole process of production meet the requirement of API standard. Our company has already won the Certification of Quality System ISO9001:2000 and has obtained the product logo licenses of API SPEC7-1 (Certificate No.7-1-0625) and API Q1 (Certificate No.0571), which are issued by American Petroleum Institute.