... drilling rig specificationAdopting AC VF motor drive, the drawworks , rotary table and mud pump achieves stepless speed regulating function .The drawworks ... (in)444.5(17 1/2)520(20 1/2)698.5(27 1/2)952.5(37 1/2)952.5(37 1 ... or 5.57.5910.5Clearance height under rotary beam, m 2.6 or 3.33.8 or 4.367.69Mud pumpModel ... rig,Drilling Rig,30,40,50,70,90DBS,drill rig,factory price,09new style,tech from USA