... bits, drill pipe, Mud pump and stablizers for water well, oil field, construction, geothermal, directional boring, and underground foundation work ... .Deris PDC bits/ PDC bits1) Be used for water well, oil field, underground, construction, geothermal, directional boring 2) Various of ... shank maximizes junk slot area for better bit cleaning. Hign filt nozzles for improved hydraulics and Rop. 5. Can be ...