The GBF Surface Drive Unit is a reliable driving mechanism for Progressive Cavity Pump (PCP) systems. Its primary function is to support and rotate the polished rod and sucker rod string, thereby driving the downhole pump to lift well fluids to the surface.
During shutdown, the anti-reversal device absorbs the reverse torque generated by the untwisting of the sucker rod string and the falling fluid column. This effectively prevents rod unscrewing (back-off), releases stored energy, and ensures the safety of both equipment and personnel
The GBF Surface Drive Unit is powered by an electric motor. The motor drives the gear shaft via a pulley reduction system. Through the transmission of arc-tooth bevel gears (spiral bevel gears), the motion is converted into a vertical rotation at the output shaft. Finally, a polished rod clamp transfers this rotational power to the polished rod, driving the sucker rod string and the downhole rotor.
The unit features a compact design and is mounted directly atop the wellhead. Its small footprint makes it particularly suitable for limited well sites and cluster well pads (manifold drilling).
Due to the operating characteristics of PCPs, the sucker rod string stores torque that must be released upon shutdown. The integrated hydraulic anti-reversal device releases this stored torque gradually, returning the rod string to a natural state. This effectively prevents rod back-off (unscrewing) and eliminates safety hazards for subsequent operations.
Combining two-stage reduction gearing with a supporting Variable Frequency Drive (VFD) system, the output speed allows for stepless regulation (infinitely variable speed) within the range of 0–500 rpm. This enables precise control of the pump speed and production output.
By equipping motors of varying power ratings, the unit is compatible with downhole PCPs from different manufacturers.
Surface-driven PCP systems require low initial investment and feature low replacement costs for downhole pumps. With high transmission efficiency, the overall system efficiency can reach over 90%. Additionally, it offers a wide speed regulation range.
The surface-mounted VFD (Variable Frequency Drive) control cabinet features comprehensive protection functions. It allows for convenient production adjustment by regulating motor speed through frequency control.
The company has been deeply engaged in the ·of pumping units for many years. It boasts comprehensive design and mass production capabilities for both conventional beam pumping units and large-scale reducers. With nearly 20 years of API 11E certification, the company delivers products of exceptional quality.
Low initial investment, few spare parts required during operation, and minimal maintenance costs. The unit features high overall efficiency and significant energy-saving effects. It is equipped with a hydraulic anti-reverse device to prevent hazards caused by the reversal of the sucker rod.
We have established a comprehensive after-sales technical service system covering core oilfield areas. During equipment operation, our professional technical team provides rapid-response maintenance services, ensuring the long-term and efficient performance of the equipment.
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