... transmission power, gearbox, sets of windlass, mud pump, sewage pump,mast are setup on the chassis.This rig ... circulation, which is equipped with BW850/20 mud pump, It adopts the slurry as the washing fluid ... high efficiency when the rig drill on mud rock and weathering formation through using the ... mast are hydraulic operated. Distribute box, sewage pump, master driving clutch system are air operated. ...