... Standard tricone bit, TCI bit, drilling cone bit, rotary bit, single cone bit1.Cutting StructureIn response to the characteristics that inserts ... bigger, so it can receive higher WOB and high reliability. 4.Hydraulic DesignSmall angled watercourse design increased the shirttail thickness and ... AvailabilitySize Bit TypeIn.mm4 1/8104.8517,527,537,617 4 1/2114.3517,527,537,6174 5/8117.5517,527 ...