Electric submersible reciprocating pump is a rodless oil extraction device for low-permeability reservoirs. As one of the new technologies of high efficiency and energy saving lifting

its application scale is expanding year by year. In the light of problems of oil field production: we creatively proposed an optimization method for submersible linear motors

including the motor

'

s lifting capacity and control methods; then we developed a new double-acting load shedding pump for deep oil wells or large displacement oil wells; after that we researched and developed new aluminum alloy submersible oil cables to reduce one-time investment costs. It is applied of 90 oil wells

then we found that the average pump inspection period increased from 452 to 693 days

the longest pump inspectio

n period exceeded 1 037 days

and the average electricity saving rate reached 45.6 %. The applications showed that the new optimized and upgraded technology had better reliability

adaptability and economy

which was beneficial to the large-scale application of electric submersible reciprocating pumps. It also provided a basis for in-depth study of variable frequency control of long line submersible oil cables and monitoring of downhole working conditions.