Tricone Bit, Drill Bit, PDC Bit manufacturer / supplier in China, offering API 7-1 Standard 12-1/4 Inch Diamond Bit with 5 Blades for Oil Petroleum Water Mining Rock Well Drilling, 12 1/4 Inches Matrix Body PDC Bits with 19mm Cutters and 6 Blades for Medium Hard to Hard Formations, Drilling Tools for Well Drilling Oil Petroleum Water Mining Rock Well Drilling Tools Diamond Drilling Bits and so on.