... drive system, the transfer case, gearbox, double-winch unit, mud pump, turntable, drilling tower, feed mechanism are set up on the ... with directional circulation. It is equipped with BW850/2A mud pump which adopts the slurry as the washing fluid and can ... ×108×7500 Assistant pipe (mm).Φ89×10×5700 BW850/2Aplunger pump Diameter of cylinder (mm)150 Stroke of piston (mm)180Theoreical ...