NOV TDS8SA Top Drive

Description

NOV (Varco) TDS-8SA Top Drive — core specs

Power / performance

  • Motor power: 1,150 HP AC

  • Continuous drilling torque: 62,250 ft-lb

  • Intermittent / makeup torque: ~95,000 ft-lb (often referenced up to ~100,000 ft-lb in design descriptions)

  • Rotary speed range: 0–270 RPM (continuous)

  • Gear ratio / transmission: 8.5:1 double-reduction helical gear

Hoisting / structure

  • Rated hoisting capacity (hookload): 750 tons (650-ton option exists)

  • System weight: ~38,750 lb (commonly shown as ~38,000–38,750 lb depending on config)

  • Working height: ~24 ft

Fluid path / well control

  • Watercourse (washpipe bore): ~3.82 in

  • Washpipe pressure rating: 5,000 psi or 7,500 psi (by configuration)

  • IBOP rating: 15,000 psi (upper typically remote-operated; lower typically manual)

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