石油学报 ›› 2016, Vol. 37 ›› Issue (8): 1047-1052.DOI: 10.7623/syxb201608011

• 石油工程 • 上一篇    下一篇

螺杆钻具定转子热力耦合行为

祝效华1, 迟博2   

  1. 1. 西南石油大学机电工程学院 四川成都 610500;
    2. 西安铂力特激光成形技术有限公司 陕西西安 710000
  • 收稿日期:2015-03-19 修回日期:2016-06-02 出版日期:2016-08-25 发布日期:2016-09-02
  • 通讯作者: 祝效华,男,1978年7月生,2000年获西南石油学院学士学位,2005年获西南石油大学博士学位,现为西南石油大学教授、博士生导师,主要从事管柱力学及井下工具设计方面的研究。
  • 作者简介:祝效华,男,1978年7月生,2000年获西南石油学院学士学位,2005年获西南石油大学博士学位,现为西南石油大学教授、博士生导师,主要从事管柱力学及井下工具设计方面的研究。Email:zxhth113@163.com
  • 基金资助:

    国家自然科学基金项目(No.51674214,No.51604234)和四川省青年科技创新团队项目(2014TD0025)资助。

Thermal-mechanical coupling behavior for screw drill stator and rotor

Zhu Xiaohua1, Chi Bo2   

  1. 1. School of Mechanical Engineering, Southwest Petroleum University, Sichuan Chengdu 610500, China;
    2. Xi'an Bright Laser Technologies Company Limited, Shaanxi Xi'an 710000, China
  • Received:2015-03-19 Revised:2016-06-02 Online:2016-08-25 Published:2016-09-02

摘要:

针对螺杆钻具定转子啮合热滞后常常引起定子烧心失效这一工程难题,建立了三维螺杆马达定转子动态仿真模型,编写相关计算程序与仿真软件二次开发子程序,利用单向解耦方法,将复杂的动态超弹性材料热力耦合问题分解为形变分析、损耗分析和传热学分析3部分,对影响定子衬套线型及温度分布的相关因素进行热力耦合有限元分析。研究发现,热滞后对定子的温度分布与定子型线位移有较大影响,钻井液压力对定子型线的位移分布影响最大,同时也会加大定子的滞后生热,而过盈量的大小也对定子的滞后生热有着较大影响,当井深达到一定深度时,不适当的过盈量会导致螺杆马达效率降低。研究结果为螺杆钻具在使用过程中常常出现的烧心、效率降低、转速慢等现象提供了理论支撑,同时也为螺杆钻具定转子线型结构优化提供理论依据。

关键词: 螺杆钻具, 定子线型, 三维有限元模型, 热滞后, 热力耦合

Abstract:

Against the engineering problems that the thermal hysteresis of screw motor always burned the stator,the papers established the three-dimensional dynamic simulation model of screw drill motor, wrote the calculation procedures and the subroutines of CAE,and divided the complex problem of thermal-mechanical coupling into mechanics analysis and heat transfer analysis to analyze the effects of the factors on stator linear. The study found that the thermal hysteresis has a great influence on the changes of stator linear and temperature distribution; drilling fluid pressure has the greatest influence on deformational displacement distribution of the stator and also increase the temperature caused by thermal hysteresis; and the magnitude of interference also has a great influence on the temperature caused by thermal hysteresis; the improper interference can reduce the motor efficiency when the well depth reaches a certain depth. The research results explained the reason that why screw drills always be burned, inefficient or stagnant, and provided a theoretical basis for the optimization of the stator linear.

Key words: screw drill, stator linear, three-dimensional dynamic simulation model, the thermal hysteresis, thermal-mechanical coupling

中图分类号: