... drilling rig: 1)Drilling depth,7000m, 2)Hook load, 4500kN, 3)Drawwork power,2000kw, 4)Auxiliary brake:E.T. N brake ZJ70/4500D rig ... electromagnetic eddy current brake.Features:Adopts one time raising type, substructure, mast and all equipments are installed at low position, and ... (960)1300 (960)1600(1180)1600(1180)Rotary Opening Diameter in(mm)20 1/2 (520)27 1/2 (698.5 ...