Improved Reliability
Proprietary design minimizes maintenance and requires little lubrication.
Progressing cavity
PCP Drive Heads
A rugged, low-maintenance drive head for progressing cavity pumps, with an optional permanent magnet direct drive.
PMMdirect drive option
VFDor sheave speed
Hydraulicbackspin brake
3D view needs WebGL.
Design features
Easy Speed Adjustments
Easily adjust RPM through VFD or mechanically adjust RPM through Sheave sizing
Permanent Magnet Motor (Optional)
The streamlined PMM direct drive head design, with minimal components, eliminates the need for gear reducer transmission.
Others
Either horizontal mounted or vertically mounted on wellhead with adapters; Hydraulic Braking System for controlled release of back spin.
On site
PCP drive head technical details
PMM direct-drive head
The ULT PMM direct-drive head pairs a high-torque permanent magnet motor directly with the wellhead. It removes the belts, sheaves and gearbox of a conventional drive head, which cuts maintenance and maximizes electrical efficiency.
Applications
- Thermal and heavy oil: high-torque production in demanding thermal recovery and heavy oil wells
- High-volume artificial lift: built for high-load, variable-flow wells that need continuous run-time
- System modernization: a direct, high-efficiency upgrade for conventional VFD and mechanical drive heads
Features
- Compact, lightweight footprint that simplifies wellhead installation and reduces rig time
- Full rated torque across the entire operating speed range
- No belts or gears to wear, cutting field maintenance costs
- Dual-layer braking: an automated, controlled slow stop plus an immediate failsafe mechanical brake for power-loss protection
- High breakout torque to overcome static friction from sand, wax or scale
- High efficiency across a wide operating range and a high power factor that lowers utility costs
Controls
- Variable speed drive (VSD) for precise pump speed optimization
- On shutdown, the VSD manages reverse rotation to safely dissipate rod string backspin energy
- SCADA ready with native Modbus RTU and Modbus TCP/IP interfaces
PMM drive head specifications
| Model | 10-450 | 12-450 | 16-450 | 20-450 | 24-450 |
|---|---|---|---|---|---|
| Rated torque, N·m | 950 | 1,187 | 1,583 | 1,979 | 2,375 |
| Rated torque, ft·lbf | 701 | 876 | 1,168 | 1,459 | 1,751 |
| Rated speed, rpm | 450 (customizable) | ||||
| Power, kW | 45 | 56 | 75 | 93 | 112 |
| Power, HP | 60 | 75 | 100 | 125 | 150 |
| Rated frequency, Hz | 37.5 | 37.5 | 60 | 60 | 60 |
| Rated voltage, V | 380 / 460 | ||||
| Overload torque (60 s), N·m | 1,425 | 1,781 | 2,375 | 2,968 | 3,562 |
| Overload torque (60 s), ft·lbf | 1,051 | 1,314 | 1,751 | 2,189 | 2,627 |
| Brake | Failsafe electromagnetic | ||||
| Brake torque, N·m | 600–800 (customizable) | 800–1,200 (customizable) | |||
| Polished rod size, in | 1-1/4 and 1-1/2 (continuous sucker rod optional) | ||||
| Axial load, t | 12 | 19 to 30 (customizable) | |||
| Axial load, lbf | 26,456 | 41,888 to 66,139 (customizable) | |||
| Frame | 315 | 355 | |||
| Wellhead flange | 3-1/8", 4-1/16" or 5-1/8", 3,000 / 5,000 psi | ||||
| Protection | IP54 | ||||
| Operating temperature, °C | −40 to 50 | ||||
| Motor dimensions, mm | Ø700 × 700 | Ø820 × 900 | |||
| Overall dimensions, mm | Ø700 × 1,800 | Ø820 × 2,100 | |||
| Weight, kg | 890 | 970 | 1,420 | 1,520 | 1,670 |
Designs can be customized to customer specifications and are subject to change without notice.
PCP drive head FAQ
What does a PCP drive head do?
The drive head sits on the wellhead and turns the rod string that drives the rotor of the progressing cavity pump downhole. It carries the rod string's axial load and controls backspin when the pump stops.
What is a PMM direct-drive head?
A drive head that pairs a high-torque permanent magnet motor directly with the wellhead. With no belts, sheaves or gearbox it needs less maintenance, and it is lighter, safer, quieter and more energy-efficient than a conventional AC motor drive head.
How is backspin controlled?
The conventional drive head uses a hydraulic braking system for a controlled release of backspin. On the PMM direct-drive head, the VSD manages reverse rotation on shutdown, backed by a failsafe electromagnetic brake for power-loss protection.
What torque and power ratings are available?
Five PMM direct-drive models from 950 to 2,375 N·m (701 to 1,751 ft·lbf) rated torque and 45 to 112 kW (60 to 150 HP), at a rated 450 rpm. Axial load ratings run from 12 t up to 30 t, with 3-1/8, 4-1/16 or 5-1/8 in wellhead flanges.
Which applications suit a PMM drive head?
Thermal and heavy oil wells that need high torque, high-volume wells that need continuous run time, and upgrades of conventional VFD and mechanical drive heads. It runs from −40 to 50 °C and is SCADA ready with Modbus RTU and Modbus TCP/IP.
How do I adjust drive head speed?
Through the VFD, or mechanically by changing sheave sizes on a belt-driven head.
