... drilling rig: 1)Drilling depth,7000m, 2)Hook load, 4500kN, 3)Drawwork power,2000kw, 4)Auxiliary brake:E.T. N brake ZJ70/4500D rig ... can satisfy the requirement for explosion-proof, safety, drilling engineering and equipment installation, dismantling and easy maintenance ... )1300 (960)1300 (960)1600(1180)1600(1180)Rotary Opening Diameter in(mm)20 1/2 (520)27 ... 34)138 (42)141 (43)148 (45) drilling rig