NOV TDS11 Top Drive

NOV TDS-11 Top Drive – General Specifications

Manufacturer: NOV (National Oilwell Varco)
Model: TDS-11 (Top Drive System)

Rated Hook Load / Blocks

The TDS-11 typically works with:

• 275 to 300 ton blocks

• API Spec 8C compliant block compatible

(If you have a specific block model nameplate, I can confirm exact block rating.)

Mechanical / Drilling Specs

• Rated Drilling Torque: ~90,000 – 115,000 ft-lb

• Rated Hoisting Load: ~250–300 tons

• Max Drilling Line Pull: ~65,000–75,000 lb
  (varies by rig configuration)

Power & Drive

• Rated Input Power: Typically 400–600 HP

• Drives are matched to:

  • Diesel engine (hydraulic or chain drive)

  • AC electric motor (VFD)

  • SCR drives (electric rigs)

Gearbox / Speed

• Gear Ratio: Model dependent (commonly 10–14:1 range)

• Designed for smooth, high torque at low speed

API & Safety

• Manufactured to API Spec 8C

• PSL-2 or PSL-3 quality level (certification plate confirms which)

• Load rated for drilling and hoisting duties

• Can handle:

  • Drilling

  • Casing

  • Heavy workover jobs