Manufacturer: National Oilwell Varco (NOV)
Model: TDS-4S
Type: Electric Top Drive
Application: Land and offshore drilling rigs
Mounting Style: Hook-mounted / integrated into mast or derrick
API Compliance: API 8C / API 7K
| Parameter | Specification |
|---|---|
| Rated Load Capacity | 500 tons (1,000,000 lbs) |
| Continuous Torque | 30,000 ft-lbs |
| Intermittent (Max) Torque | 40,000 ft-lbs |
| Maximum Speed (RPM) | 250 RPM |
| Quill Diameter | 5 1/4" OD |
| Drilling Depth Capacity | Varies with rig structure (typically 30–45 ft travel) |
| Component | Specification |
|---|---|
| Drive Motors | 2 × 1150 HP AC motors |
| Motor Power Total | 2,300 HP |
| Voltage Range | 600–690 V AC (VFD-controlled) |
| Control System | Amphion™, Cyberbase™, or similar |
| VFD Compatibility | Yes (NOV VFD or 3rd party) |
| Cooling Method | Air-cooled standard; optional water-cooled |
| Feature | Availability |
|---|---|
| Pipe Handling System | Yes (link tilt & pipe handler optional) |
| Top Drive Swivel | Integrated |
| Washpipe Assembly | Replaceable, greased |
| Remote Control Console | Included (wired or wireless) |
| Emergency Shutoff System | Included |
| Torque Monitoring | Real-time torque & RPM feedback |
| Thread Saver Sub | Optional |
Height (Hanging Configuration): ~16–18 ft
Width: ~6–7 ft
Weight (approximate): 45,000–55,000 lbs (varies with configuration)
Travel Distance (Rail System): Typically up to 45 ft
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