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Study on Equivalent Viscous Damping Coefficient of Sucker Rod Based on the Principle of Equal Friction Loss

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Listed:
  • Qin Li
  • Bo Chen
  • Zhiqiang Huang
  • Haipin Tang
  • Gang Li
  • Lei He

Abstract

Equivalent viscous damping coefficient is an important parameter of wave equation for sucker rod string. In this paper, based on the principle of equal friction loss, when the viscous energy consumption and the local damping energy consumption are taken into account, effects of equivalent viscous damping coefficients are obtained. Through deducing energy consumption equation of oil and energy consumption equation of the coupling, theoretical formula for equivalent damping coefficient of sucker rods is received. Results show that the smaller the K is (K is the ratio of sectional area of tubing to sucker rod), the larger the proportion of damping coefficient caused by viscous energy consumption in the equivalent damping coefficient of sucker rod system is. When K< 0.095, the proportion of damping coefficient caused by viscous energy consumption is more than 90%. Reducing the sudden change of cross-section area at sucker rod coupling has remarkable effect on reducing damping force of the sucker rod system. The research provides a theoretical basis for the application and design of sucker rod and tubing.

Suggested Citation

  • Qin Li & Bo Chen & Zhiqiang Huang & Haipin Tang & Gang Li & Lei He, 2019. "Study on Equivalent Viscous Damping Coefficient of Sucker Rod Based on the Principle of Equal Friction Loss," Mathematical Problems in Engineering, Hindawi, vol. 2019, pages 1-12, April.
    • Handle: RePEc:hin:jnlmpe:9272751
    DOI: 10.1155/2019/9272751
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    Cited by:

    1. Biao Ma & Shimin Dong, 2023. "Coupling Simulation of Longitudinal Vibration of Rod String and Multi-Phase Pipe Flow in Wellbore and Research on Downhole Energy Efficiency," Energies, MDPI, vol. 16(13), pages 1-17, June.

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