石油学报 ›› 2013, Vol. 34 ›› Issue (6): 1176-1180.DOI: 10.7623/syxb201306019

• 石油工程 • 上一篇    下一篇

基于密封性能要求的超深井钻柱极限提升力的确定

陈锋1, 狄勤丰1, 王文昌1, 王明杰1, 袁鹏斌2, 周永其2   

  1. 1. 上海大学上海市应用数学和力学研究所 上海市力学在能源工程中的应用重点实验室 上海 200072;
    2. 上海海隆石油管材研究所 上海 200949
  • 收稿日期:2013-05-21 修回日期:2013-08-17 出版日期:2013-11-25 发布日期:2013-10-13
  • 通讯作者: 狄勤丰,男,1963年8月生,1984年毕业于华东石油学院,1997年获西南石油大学博士学位,现为上海大学教授、博士生导师,主要从事石油工程力学方面的研究。Email:qinfengd@sina.com
  • 作者简介:陈锋,男,1986年8月生,2008年获上海大学学士学位,现为上海大学博士研究生,主要从事石油工程力学方面的研究工作。Email:stokes1986@126.com
  • 基金资助:

    国家自然科学基金项目(No.51174130,No.50674065)、上海市重点学科建设项目(S30106)、上海石油管工程技术研究中心建设项目(10dz22522300)、上海市部分地方院校能力建设项目(12160500200)、上海领军人才基金项目和上海市科委优秀学术带头人项目(12XD1402500)资助。

Determination of ultimate lifting capacity of drill string for ultra-deep wells based on sealing performance of tool joint

CHEN Feng1, DI Qinfeng1, WANG Wenchang1, WANG Mingjie1, YUAN Pengbin2, ZHOU Yongqi2   

  1. 1. Shanghai Institute of Applied Mathematics & Mechanics, Shanghai University, Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai 200072, China;
    2. Shanghai HiLong Petroleum Tubular Goods Research Institute, Shanghai 200949, China
  • Received:2013-05-21 Revised:2013-08-17 Online:2013-11-25 Published:2013-10-13

摘要:

为了评估大轴向载荷作用下的钻杆接头密封性能,保证钻杆接头的使用性能,采用三维有限元方法建立了双台肩钻杆接头高精度有限元模型,研究了钻杆接头的密封机理,并分析了其在上扣扭矩和轴向拉力作用下的力学特性。研究结果表明,双台肩钻杆接头的密封以主台肩、副台肩为主,只有当上扣扭矩使主、副台肩上产生一个合理的接触压力后,才能保证接头的密封性能;轴向拉力的作用将降低主、副台肩上的接触压力,从而影响接头的密封性能;当轴向拉力超过2 500 kN时,主、副台肩将失去密封性能,从而增加接头发生应力腐蚀的风险。该研究结果对超深井钻杆接头使用性能的提高和钻柱极限提升力的确定具有一定的参考价值。

关键词: 钻具接头, 密封性能, 三维有限元, 极限提升力, 超深井

Abstract:

In order to evaluate the sealing performance of tool joint in large axial load and ensure the usability of tool joint, a precision finite element model of double shoulder tool joint was established using three-dimensional finite method to describe the sealing mechanism of tool joint. This model could analyze mechanical characteristics of tool joints under actions of make-up torque and axial tension. The results showed that: The sealing performance of double shoulder tool joint was mainly with the primary and secondary shoulder, and rational contact pressure which was produced by the primary and secondary shoulder guaranteed the sealing performance of tool joint; Axial tension may reduce the contact pressure on the primary and secondary shoulder, which weakened the sealing performance of tool joint; When the axial tension reaches to 2 500 kN, the primary and secondary shoulder would lose their sealing performance, which increased the risk of stress corrosion of tool joint. These results could be taken as a reference in determining the ultimate lifting capacity of drill string and improving the performance of tool joint.

Key words: tool joint, sealing performance, 3-D finite element analysis, ultimate lifting capacity, ultra-deep well

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