Tricone Bit, Drill Bit, PDC Bit manufacturer / supplier in China, offering 4 5/8 Inches Steel Body PDC Bits with 13mm Cutters and 5 Blades for Soft to Medium Hard Formations, API 7-1 Standard 8-1/2 Inch Diamond Core Bit with Blades for Oil Petroleum Mining Rock Well Drilling Tools, API 7-1 Standard 8-1/2 Inch PDC Bit with 6 Blades for Oil Petroleum Water Mining Rock Well Drilling and so on.