The main technical parameter of 1500HP drilling rig: Model ZJ50/3150DZ ZJ50/3150DB ZJ50/3150LDB Nominal drill depth(with 4 1/2” drill pipe) 3500-5000m Max. rating hook load 3150 kN Max. No. of lines for traveling block 12 O.D of wire line 35mm (1 3/8”) Sheave O.D of traveling block 1270mm(50”) I.D. of swivel stem 75mm(3”) Rated power of drawworks 1100 kW(1500hp) Transmmission of drawworks ZJ50/3150DZ: 4 ZJ50/3150DB :1 ZJ50/4500LDB:4 Diameter of rotary table opening 698.5(27 1/2”) or 952.5mm(37 1/2”) Rotary shift No. ZJ50/3150DZ: 2 ZJ50/3150DB :1 ZJ50/3150LDB:1 Power of each mud pump 960kW(1300hp) or 1180kW(1600hp) Working height of mast 45m(147ft) Height of drill floor 7.5m(25ft) or 9m(30ft) Clear height of drill floor 7.62m(25ft) or 8.92m(29.5ft)