... vehicle. The transfer case, main drive system, gear box, double-winch, mud pump, turntable, drill tower, feeding tools are ... reverse circulation 6PS sand pump, directional circulation clean water centrifugal pump IS150-125-315, 2BV5121 vacuum pump; BW850/20A reciprocate double ... drilling tower are hydraulic controlled. Transfer case, mud pump clutch system are air operated. The appearance of rig is ...