... 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 ... (m)6600 (2000)9900 (3000)13100 (4000)16400 (5000)23000 (7000)Max. Hook Load, lbf(kN)303,500 ... )138 (42)141 (43)148 (45) drilling rig