Electric Submersible Screw Pump

The direct drive submersible screw pump system adopts a new multi-stage permanent magnet motor, which is directly connected through a flexible shaft to drive the screw pump to rotate and lift crude oil to the ground. The oil production system has the characteristics of no rod pipe wear, reliable operation, small maintenance workload, no noise pollution, etc. Wells, Cluster Wells, Horizontal Wells, and Coal Bed Methane Drain Wells.

Structure and composition

Electric submersible screw pump oil production system mainly consists of permanent magnet direct drive submersible motor, protector, coupling, screw pump and ground control cabinet. The submersible permanent magnet direct drive motor has the characteristics of low output speed, high torque, high efficiency and low power consumption; The high wear and corrosion resistant coupling can dampen, reduce vibration and improve the dynamic performance of the shaft, and withstand the axial force, so as to ensure the transmission of torque and the running precision of the main and driven shafts. The screw pump stator and rotor are interchangeable, and at the same time, the type of rubber can be matched according to well conditions to meet the production needs of oil wells.

Process characteristics

1. The permanent magnet direct drive motor system has high efficiency and remarkable energysaving effect. The high-efficiency screw pump lifts the fluid from the well, has a large flow area and small friction resistance, and the system efficiency is higher than that of the pumping unit rod pump well. Compared with the electric heating rod pit, the energy saving rate is more than 90%, saving more than 60% of electricity;

2. The permanent magnet direct drive motor is adopted, and the starting torque is large, up to 1.82 times of the rated torque, which is in line with the starting characteristics of the screw pump;

3. Adopt permanent magnet direct drive motor, low supply voltage and low cable requirements;

4. The screw pump has continuous lift and low shear action, and the efficiency of heavy oil in the pump is high;

5. No ground equipment, small footprint, suitable for agricultural well development;

6. Rodless oil recovery, no noise, no pipe rod loss, no wellhead leak point;

7. The speed is convenient to adjust, reducing labor intensity and O&M costs, suitable for directional wells and horizontal wells;

8. Digital remote intelligent control, monitoring the operating status of the detection system, and the use of downhole temperature and pressure measurement devices to realize constant liquid level control and automatic interval pumping.