The permanent magnet direct-drive surface drive consists of two parts: the control system and the surface device. The surface device includes a vertical hollow shaft direct-drive device. The bottom is equipped with a load-bearing bearing with a capacity of ≥10T, capable of supporting the weight of the rod string and the axial forces generated during operation. The top is equipped with a coupling, drive square clamp, and anti-drop square clamp.
The permanent magnet direct-drive surface drive consists of two parts: the control system and the surface device. The surface device includes a vertical hollow shaft direct-drive device. The bottom is equipped with a load-bearing bearing with a capacity of ≥10T, capable of supporting the weight of the rod string and the axial forces generated during operation. The top is equipped with a coupling, drive square clamp, and anti-drop square clamp.
The sealing device can use bottom packing seals or top mechanical seals, and is equipped with an electromagnetic soft brake system and protective cover.
① Utilizes a high-efficiency, low-speed AC permanent magnet servo torque synchronous motor with a high power factor.
② Simple, rational, and high-efficiency transmission system structure.
③ The low-speed AC permanent magnet servo torque motor provides high starting torque.
④ Unique gradient torque release solution, quickly and completely releasing the elastic potential energy in the sucker rod.
⑤ Stepless speed regulation ensures the safe and convenient use of the screw pump.
⑥ Compared to traditional pumping units, it occupies a smaller area, uses packing seals, and has low maintenance costs. The wide speed adjustment range makes it more suitable for oil well extraction.
The permanent magnet direct-drive surface drive controls the rotation of the permanent magnet motor through a frequency conversion control system, adjusting the speed and improving system efficiency.
Currently, this drive device is mainly used in Xinjiang Oilfield and Qinghai Oilfield, with an annual application of approximately 20 units.
