... 5)It can receive high WOB in the conventional drilling. It is suitable for various formations by matching ... bits,Steel tooth bits,PDC bits Appliable water well, oil field, construction, geothermal, directional boring, and underground ... drill bits, drill pipe, Mud pump and stabilizers for water well, oil field, construction, geothermal, directional boring, and ... 8 1/2''TCI Tricone Bit for oil drilling