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NOV TOP DRIVE MODEL TDH-150 and TDH-250
| TDH-150 | TDH-250 |
| | Motor Type | Hydraulic Motors | Hydraulic Motors | | Horsepower Rating | 2X112HP | 3X150HP | | TDS Working Height | 12.4 ft (3,779 mm) | 14.5 ft (4,419 mm) | | Weight | 9,800 lb (4,445 kg) | 13,400 lb (6,078 kg) | | Transmission |
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| | GearRatio | 14.59:1 | 18.7:1 | | Drilling Parameters |
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| | MaxSpeed | 200 RPM | 225 RPM | | Max ContinuousTorque | 15,000 ft-lb (20,337 N-m) | 23,000 ft-lb (31,183 N-m) | | Speed at Max ContinuousTorque | 76 RPM | 100 RPM | | Max Breakout Torque | 35,000 ft-lb (47,453 N-m) | 40,000ft-lb (54,232 N-m) | | Max Makeup Torque | 35,000 ft-lb (47,453 N-m) | 40,000ft-lb (54,232N-m) | | Static Lock Brake | 15,000 ft-lb (20,337 N-m) | 35,000ft-lb (47,453 N-m) | | Rating Capacities |
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| | Hoisting | 150 ton (136,077 kg) | 250 ton (226,796 kg) | | Water Course | 2-13/16 in (71.4 mm) | 2% in (69.8 mm) | | Washpipe Packing | 5,000 psi (344 bar) | 5,000 psi (344 bar) | | PipeHandler | N/A | N/A | | Breakout Torque Capacity | 35,000 ft-lb (47,453 N-m) | 40,000ft-lb (54,232 N-m) | | Drill Pipe Range | 2% in – 416 in (73 mm-114.3 mm) | 2% in-5% in (73mm-139.7 mm) | | Connection OD | upto6H”OD | upto 6%” OD | | IBOP Pressure Rating | 10,000 psi (689 bar) | 10,000 psi (689bar) | | UpperlBOP | Dual Ball IBOP (1 Remote, 1 Manual) | Dual Ball IBOP (1 Remote, 1 Manual) | | Lower IBOP | N/A | N/A | | Rotation/Orientation | No Rotation | 360°/Unlimited | | Other |
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| | Cooling System | None | None |
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