... 5,6in Well drilling equipment parts-PDC bitZhengzhou LD Diamond products as professional Drill bit manufacturer. supplies drill bits for the water well,geothermal well, rock drilling,mining ... abrasion resistance, increased the bit lifeHigh drilling efficiencyApplied to rock formation f≤12Used for for water well drilling, geotechnical and environmental drilling, mineral exploration, geothermal wells, ...