A land rig design in which the diesel engines, gear compound, and draw works are at or near ground level, 12 to 15 feet below and behind the rig floor. On the rig floor are the cat works and the rotary table as on a conventional rig. The power from the high-speed (1,800 rpm) diesel engines is transmitted through clutches and compound to the rotary table through a torque tube, rising at about a 45' angle to the gear and chain drive on the rig floor.
