... 4.API PDC drill bits for oil well or water well drilling&pdc diamond cutter 1.Introduction about ... bits, drill pipe, Mud pump and stablizers for water well, oil field, construction, geothermal, directional boring, ... 3.Deris PDC bits/ PDC bits1) Be used for water well, oil field, underground, construction, geothermal, directional ... !!! PDC drill bits for oil well or water well drilling&pdc diamond cutter