Development and Application of a Detection System for Submersible Permanent Magnet Linear Motor

The submersible direct-drive plunger pump is a kind of high-efficiency rodless lifting equipment with small displacement, which is popularized and applied in low production and low permeability oilfield in recent years. It has the advantages of being energy saving, environmentally-friendly and eliminating eccentric wear of rod and tube. For years, there was a lack of effective indoor detection methods for permanent magnet submersible linear motors, the core part of submersible direct drive plunger pump, and the unit failure occured at well sites due to insufficient lifting force and excessive vibration regularly. This test system is on the basis of indoor test and designed to test and analysis various technical specifications of submersible linear motor systems (including the submersible linear motor and its control cabinet), mainly including test efficiency, rated parameters testing, limit test, and mechanical vibration. Moreover, the drawing of the dynamic thrust, velocity and accelerating curves under different frequencies can be realized, based on which the best working point for the field application of submersible direct drive plunger pump can be found.