1.Well drilling equipment parts-PDC bit 2.PDC Non coring bit,PDC concave drill bit,PDC drag bits 3.Bit size:56-153mm( ... for the water well,geothermal well, rock drilling,mining and geology exploration. TypeSpecificationFeatureApplication Field NW-T-301Type:NW-T-301Diameter:56 ... 008.0013.2016.0019.00HM series for geology exploration and mining(super-forced) HM PDC cutter is the top product, through lots ...