HeJian Solidkey Petroleum Machinery Co., Ltd. specialize inresearch and development of drilling tools and drilling equipments,we are manufacturing and marketing with senior technicalstaffs for many years. The structure of company isflexible, so the response is prompt to technologyrevolution and equipments renovation.   The world's most cutting-edge design (CAD / CAM,Pre / E computer-aided design) and technology are appliedin manufacturing system. All process of manufacturing is inline with API specifications, ISO9001. With using of CNC lathes,heat-treatment facility, CNC sintering furnace brazing boxintegration of advanced welding equipment,we can manufacture 3 1/2"~ 26" comprehensive drilling tools andequipments.    Our company have a group of experienceddesigners and engineers, which are servicing in drillingfields to provide expert solutions.   Requirements of customer is our workingstandards, our motto is "Provide a better supplies and service forwell drilling" .