... PTO. Equipped with reverse circulation 6PS sand pump, directional circulation clean water centrifugal pump IS150-125-315, ... rock, weathered rock, bed rock. Using reverse& directional water tap,182X182X4.5M driving drill pipe and 168 ... assistant drill pipe, IS150 clean water pump realize directional circulation, change to 6PS sand pump to realize ... pipe (mm) (mm)D168×8×3000 multi-function drilling rig