石油学报 ›› 2008, Vol. 29 ›› Issue (1): 149-152.DOI: 10.7623/syxb200801033

• 石油工程 • 上一篇    下一篇

用有限元法预测抽油杆柱与油管柱偏磨点位置

刘合1, 王素玲2   

  1. 1. 大庆油田有限责任公司, 黑龙江大庆, 163454;
    2. 大庆石油学院机械科学与工程学院, 黑龙江大庆, 163318
  • 收稿日期:2007-04-14 修回日期:2007-07-02 出版日期:2008-01-25 发布日期:2010-05-21
  • 作者简介:刘合,男,1961年8月生,2002年获哈尔滨工程大学博士学位,现为大庆油田有限责任公司副总工程师,主要从事油气田开发及研究工作.E-mail:liuhe@petrochina.com.cn
  • 基金资助:
    黑龙江省自然科学基金项目(E200633)资助

Prediction of abraded points between sucker rod string and tubing by using finite element method

LIU He1, WANG Suling2   

  1. 1. PetroChina Daqing Oilfield Limited Company, Daqing 163454, China;
    2. College of Mechanical Science and Engineering, Daqing Petroleum Institue, Daqing 163318, China
  • Received:2007-04-14 Revised:2007-07-02 Online:2008-01-25 Published:2010-05-21

摘要: 针对细长抽油杆上下往复运动时沿井深与井眼圆周方向产生摩擦接触的问题,根据振动理论,建立了抽油杆柱非线性动力学模型。根据非线性理论和有限元理论,采用接触单元,描述了抽油杆与油管的接触状态,并与空间梁单元结合,在考虑实际边界条件下提出了抽油杆柱参数的计算方法。对大庆油田10-6551井进行了模拟,通过计算,定量地描述了抽油杆与油管接触力的变化。根据接触力的分布状态,计算了扶正器的安装位置。用这种方法使接触力平均降低50.6N,减缓了抽油杆柱的偏磨。该方法已在大庆部分采油厂得到推广和应用。

关键词: 抽油杆, 油管, 动力学分析, 摩擦接触力, 非线性动力学模型, 有限元法

Abstract: There exist some friction contacts between reciprocating rod string and tube in the direction of well depth and circumference of well bore.A nonlinear dynamics model for describing the friction contact was built on the basis of the vibration theory.The contact elements to describe the random impact contact state were constructed.The analysis and calculating methods for the parameters of rod string were proposed by combining the nonlinear theory and finite element method with space beam element.This method was applied to the Well 10-6551 in Daqing Oilfield.The contact load can be determined by the calculation method,and the positions of centralizer were forecasted according to the distribution of contact load.The average contact load can be reduced by 50.6 N and the side-wear can be lowered by using this method.

Key words: pumping rod tube dynamics analysis friction contact load nonlinear dynamics model finite element method

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