Wellhead Tools, Cementing Tools, Downhole Tools manufacturer / supplier in China, offering API Oilfield 12 1/4 Inch IADC 637 TCI Tricone Rock Drill Bit, 6"--48" Straight Pipe Wrench Maxpower American Type Heavy Duty, 20 Years Supplier Cementing Hydraulic Mechanical Liner Hanger Used for Oilwell and so on.