... codes . 2.Fast drilling speed. 3.Meet with API Spec7-1 Standard tricone bit, TCI bit, drilling cone bit, rotary bit ... .Optirnized hydraulics structure improves the clearing capability and increases ROP. 5. Product ApplicationIt is suitable for sidetracking, deep well drilling and ... Main AvailabilitySize Bit TypeIn.mm4 1/8104.8517,527,537,617 4 1/2114.3517,527,537,6174 5/8117.5517,527,537 ...