Oil Drilling Diamond Bitimprenganated Diamond Bit Beijing Superior Drilling Equipment Co., Ltd. Base Info Model NO.:FICustomized:CustomizedStandard:AISI, APILength:Taper-lengthType:Oil Drill BitMaterial:DiamondUsage:Well DrillingTrademark:SuperiorSpecification:3"-26"Origin:ChinaHS Code:82071900 Description Pre:Factory Direct Sale 11 5/8′′ (295.3mm) IADC 217 TCI Tricone Rock Drill Bit for Water Well Next:IADC/API/TCI Tugsten/Carbide Tricone Roller Bit for Oil/Well Drilling Coal Mining/Equipment 12 1/4 Inch IADC127 Tricone Drill Bits