Dynamic coupling modelling and application case analysis of high-slip motors and pumping units

Feng, Z., Ma, Q., Liu, X. , Cui, W., Tan, C. and Liu, Y. (2020) Dynamic coupling modelling and application case analysis of high-slip motors and pumping units. PLoS ONE, 15(1), e0227827. (doi: 10.1371/journal.pone.0227827) (PMID:31999730) (PMCID:PMC6992195)

Abstract

To solve the issues and difficulties in the high-coupling modelling of beam pumping units and high-slip motors, external characteristic experiments of high-slip motors were performed where the external database and characteristic correlation equations of the motors were obtained through data regression analysis. Based on the analysis of the kinematics, dynamics and driving characteristics of the beam pumping unit, a fully coupled mathematical model of a motor, pumping unit, sucker rod and oil pump was established. The differential pumping equation system of the pumping unit used a cyclic iteration method to solve the problem of high coupling among the motor, pumping unit, sucker rod and the pumping pump. The model was verified by experimental data of field l pumping wells. Theoretical calculations and experimental tests showed that the soft characteristic of the high-slip motor can reduce the peak suspension load of the sucker rod, peak net torque of the gearbox and peak power of the motor. In addition, the results show that the soft characteristic can also decrease the high-frequency fluctuation of the motor power curve and the torque curve of the gearbox. The highslip motor can improve the smoothness and safety of the pumping well system.

• Item Type: Articles
• Additional Information: The project was funded by Natural Science Foundation of Heilongjiang province (No.LH2019E018), China Postdoctoral Science Foundation (No.2018T110268;2018M641804), Natural Science Foundation of China (No.51774091;51607035).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Liu, Dr Xiaolei

Creator Roles

Liu, X.: Writing – review and editing

• Authors: Feng, Z., Ma, Q., Liu, X., Cui, W., Tan, C., and Liu, Y.
• Subjects: T Technology > TJ Mechanical engineering and machinery
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: PLoS ONE
• Publisher: Public Library of Science
• ISSN: 1932-6203
• ISSN (Online): 1932-6203
• Copyright Holders: Copyright © 2020 The Authors
• First Published: First published in PLoS ONE 15(1):e0227827
• Publisher Policy: Reproduced under a Creative Commons License