Mud Pump, Top Drive, Power Tongs manufacturer / supplier in China, offering Oil Well Accessories API 11b Class T 1" Casing and Tubing Sucker Rod Couplings for Petroleum Equipment Oil Extraction, Drilling Oil Gas Wells OCTG API Casing and Tubing Coupling Sucker Rod Coupling with Casing and Tubing for Oil Country Tubular Goods, Oil Gas Petroleum Accessories Class Sm HS/T/Sm Sucker Rod Couplings for Threaded Tubing and Casing Pipes in Oilfield and so on.