The permanent magnet direct drive device for PCP is an upgraded drive equipment for surface PCP. It adopts a low-speed and high-torque permanent magnet synchronous motor to directly drive the wellhead polished rod, replacing the traditional transmission structure of "motor + belt + reducer".The system consists of a permanent magnet direct drive main unit, a variable-frequency control cabinet, wellhead connection components, and sensing protection devices. It features stable operation, high transmission efficiency and stepless speed regulation. The device effectively avoids common problems such as belt wear, reducer oil leakage and excessive noise, and greatly reduces maintenance frequency and energy consumption.Meanwhile, it is equipped with functions including overload protection, reverse braking and intelligent monitoring. It is applicable to various working conditions such as conventional wells, deviated wells and heavy oil wells, serving as a mainstream solution for energy saving, efficiency improvement and unattended operation in screw pump oil production.
The permanent magnet direct drive device for PCP takes the permanent magnet synchronous motor as the core, replacing the traditional reduction transmission scheme. It features high overall integration and high transmission efficiency, serving as a new energy-saving drive structure adapted to oilfield production working conditions.
Cancel the traditional gearbox. The permanent magnet motor directly drives the screw pump through the sucker rod without intermediate transmission links. It features a compact structure and small size, greatly reducing mechanical loss and installation space.
Adopting a rare-earth permanent magnet hollow shaft motor, it can directly output high torque at low speed without needing a coupling. It features short axial dimension, low operating vibration and noise, with remarkably improved transmission efficiency.
Integrated base structure with high rigidity and light weight; dust-proof and rainproof, suitable for high and low temperature outdoor environments in oilfields.
Equipped with a dedicated driver, it can precisely adjust rotational speed and torque. It provides protection functions such as overload and phase loss, supports remote regulation, and features stable operation and remarkable energy-saving effect.
Gearbox-free and coupling-free, the transmission chain is greatly shortened, mechanical fault points are reduced, vibration and noise are low, and equipment failure rate as well as maintenance workload are significantly decreased.
Relying on the variable frequency control system, stepless speed regulation in a wide range can be realized. The displacement can be flexibly adjusted according to the working conditions of liquid production, gas content and sand content of oil wells, improving the adaptability and stable production capacity of the lifting system.
Eliminating intermediate transmission losses such as those from reduction gearboxes, the permanent magnet motor features high efficiency and high power factor, delivering remarkable power savings compared with conventional drive systems. It offers outstanding economic benefits during long-term operation.
The overall structure is compact with a small footprint. The integrated base design enables simple on-site commissioning, shortens the construction period, and meets the requirements of standardized and modular deployment in oilfields.
The company has been engaged in the R&D and manufacturing of permanent magnet direct drive devices for PCP for many years, with complete capabilities in testing, design and large-scale production, delivering products of superior quality.
Relying on the variable frequency control system to achieve stepless speed regulation, it can real-time adjust the rotational speed and displacement according to the changes of oil well liquid production, sand content, gas content and dynamic liquid level. It is suitable for complex working conditions such as low-yield wells, heavy oil wells and high sand content wells, ensuring stable lifting and improving oil well recovery efficiency.
We have established an after-sales technical service system covering core oilfield areas. During equipment operation, our professional technical team provides quick-response after-sales maintenance services to support long-term and efficient operation of the equipment.
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