... 8 to 26 Covers almost all IADC codes suitable for sidetracking, deep well drilling Advantage: 1> TCI tricone bit, steel ... ,used drill bits stock,used mud pumps,etc9> be used for water well, oil field, underground, construction, geothermal, directional boringDescription ... and increases ROP.5> Product ApplicationIt is suitable for sidetracking, deep well drilling and old well repairing.6> Current ...