Spring Well Drilling Tricone Bit Beijing Superior Drilling Equipment Co., Ltd. Base Info Model NO.:IADC217Customized:CustomizedStandard:APILength:Taper-lengthType:Center Drill BitMaterial:Tungsten CarbideUsage:Well DrillingTrademark:superiorTransport Package:Woodern BoxOrigin:Hebei Description Pre:Piling Foundation Rock Bit 7 7/8 Inch IADC537 Next:346mm IADC127 Oil Water Well Drilling Bit Oil Gas Drilling Equipment Tricone Rock Bit