Shanxi Fenglei Drilling Tools Co., Ltd., having been granted API Spec. 7,7-1, API Spec. 5 DP, ISO9001 certificate, is a leading manufacturer of drilling tools products. Our company was founded in 1968 and has been manufacturing top-quality drill pipes,drill collars, integral and welded heavy wall drill pipes and kellys since 1978. Our drilling tools are widely used by domestic and overseas oil industry companies (Sinopec, CNPC, CNOOC, BP, PDVSA, Saipem and so on). Our products are also exported to most oil production countries and areas, such as the North Sea, the Gulf of Mexico, the Persian...