... suitable for sidetracking, deep well drilling Advantage: 1> TCI tricone bit, steel teeth tricone bit,rock bit,milled tooth bit,tci bit,steel ... ,used drill bits stock,used mud pumps,etc9> be used for water well, oil field, underground, construction, geothermal, directional ... resistance of the bearing are improved. Compared with three cone bit, the leg bearing is bigger, so it can receive ...