HDD Crossing Pilot 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:Steel Tooth Tricone Bit for HDD Drilling Next:Oil Drilling Steel Tooth Tricone Bit