... .Optirnized hydraulics structure improves the clearing capability and increases ROP. 5. Product ApplicationIt is suitable for sidetracking, deep well drilling and ... ,527,537,617 4 1/2114.3517,527,537,6174 5/8117.5517,527,537,6174 3/4120.6517,527,537 ... ,6175 7/8149.2517,527,537,6176152.4517 Please specify the following ...