China Water Well Drilling Tricone Bit Beijing Superior Drilling Equipment Co., Ltd. Base Info Model NO.:IADC537Customized:CustomizedStandard:APILength:Taper-lengthType:Center Drill BitMaterial:Tungsten CarbideUsage:Well DrillingTrademark:superiorTransport Package:Woodern BoxOrigin:Hebei Description Pre:346.1mm IADC537 Oil Drilling Bits / Tungsten Carbide Insert Bit / Tricone Roller Rock Bit Next:8.5inch TCI Roller Bit Single Cone IADC 637/627/617/537