... drilling rig: 1)Drilling depth,7000m, 2)Hook load, 4500kN, 3)Drawwork power,2000kw, 4)Auxiliary brake:E.T. N brake ZJ70/4500D rig ... .It can satisfy the requirement for explosion-proof, safety, drilling engineering and equipment installation, dismantling ... 2250DZZJ50/3150JZJ50/3150LDBZJ50/3150DB ZJ50/3150DZZJ70/4500LDBZJ70/4500DBNominal Drilling Depth(114mm DP) ft (m)6600 ... 141 (43)148 (45) drilling rig