... rotary drilling rig with directional circulation, which is equipped with BW900/25 mud pump, It adopts the slurry parameter Drilling depth(M)80300 Drilling diameter ... (mm)1500500 Speed of turntable(r/min)21.2,36,63.2,100.6,155 ... of turntable(KN.m)18,10.6,6,3.8,2.5,18.9(reverse) Single rope lifting capacity of windlass ...