... the bit has good gauge protection and up drill capability. 3.Bearing StructureHigh precision journal bearing. Balls lock the cone.Hardface ... Optirnized hydraulics structure improves the clearing capability and increases ROP. 5. Product ApplicationIt is suitable for sidetracking, deep well drilling and ... 2114.3517,527,537,6174 5/8117.5517,527,537,6174 3/4120.6517,527,537,6175 7/8149.2517,527,537,6176152 ...