Full scale test of ZXCY-Series linear motor pumping units

Abstract

To solve the technical problem of the great propulsion permanent magnet synchronous linear motor, the ZXCY-Series linear motor pumping unit is developed. The linear motor pumping unit takes electric energy into straight reciprocating motion directly by frequency conversion and control, and simplifies the energy transfer process. Compared with the beam pumping unit, its energy transfer efficiency is increased by about 23%. The new pumping unit actualizes swabbing parametric stepless adjustment and meets operation requirements during production. It was applied to six wells in Huabei Oilfield, Jianghan Oilfield, Tarim Oilfield and Dagang Oilfield. The average liquid production per day of oil well, the system efficiency of single well, input power, comprehensive power-saving rate all show significant improvement after using the new pumping unit. The pumping unit can meet the needs of deep-pumping wells using the big pump, liquid-raising wells using a high pumping rate, the needs of production wells such as heavy oil wells and high gas-oil ratio wells, and the wells that are short of liquid feed. Key words: great propulsion, linear motor pumping unit, beam pumping unit, swabbing parameter, stepless adjustment