磨损套管螺纹接头密封面力学特性

doi:10.7623/syxb202105010

石油学报 ›› 2021, Vol. 42 ›› Issue (5): 669-676.DOI: 10.7623/syxb202105010

磨损套管螺纹接头密封面力学特性

狄勤丰^1,2, 王楠^1,2, 陈锋^1,3, 陈涛⁴, 王文昌^1,2, 陈薇^1,2

1. 上海大学上海市能源工程力学重点实验室上海 200444;
2. 上海大学力学与工程科学学院上海 200444;
3. 上海大学机电工程与自动化学院上海 200444;
4. 上海大学计算机工程与科学学院上海 200444

收稿日期:2020-04-11 修回日期:2020-11-28 出版日期:2021-05-25 发布日期:2021-06-05
通讯作者: 陈锋,男,1986年8月生,2008年获上海大学学士学位,2014年获上海大学博士学位,现为上海大学副教授,主要从事石油工程管柱力学方面的研究工作。Email:chenfeng536@shu.edu.cn
作者简介:狄勤丰,男,1963年8月生,1984年获华东石油学院学士学位,1997年获西南石油学院博士学位,现为上海大学教授、博士生导师,主要从事石油工程技术和力学问题的研究。Email:qinfengd@sina.com
基金资助:
国家自然科学基金项目（No.U1663205，No.51804194，No.51704191）和上海市重点学科建设项目（S30106）资助。

Mechanical properties of the sealing surface of worn casing threaded connection

Di Qinfeng^1,2, Wang Nan^1,2, Chen Feng^1,3, Chen Tao⁴, Wang Wenchang^1,2, Chen Wei^1,2

1. Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200444, China;
2. School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China;
3. School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200444, China;
4. School of Computer Engineering and Science, Shanghai University, Shanghai 200444, China

Received:2020-04-11 Revised:2020-11-28 Online:2021-05-25 Published:2021-06-05

摘要/Abstract

摘要： 螺纹接头磨损是影响套管密封完整性的主要原因之一。由于套管螺纹接头结构特征复杂，常规计算模型无法得到解析解，实验研究也较困难，因此针对磨损条件下接头密封面力学特性的研究很少。鉴于此，建立了均匀磨损、偏心筒型磨损和月牙型磨损3种磨损形式的套管螺纹接头三维弹塑性有限元模型，基于ABAQUS软件分析了磨损深度为5 mm时套管螺纹接头在复杂载荷条件下的应力应变特征，研究了上扣扭矩、轴向拉力和弯矩作用下3种磨损形式对套管螺纹接头密封面力学特性的影响。研究结果表明，均匀磨损套管螺纹接头的密封面上存在较大塑性应变，且接触力比其他磨损形式大，密封失效风险较高。偏心筒型和月牙型磨损使得套管螺纹接头密封面接触面积、环形密封带最窄处接触宽度都有所降低，增加了接头局部漏失风险，影响套管螺纹接头的密封可靠性。

关键词: 磨损, 套管螺纹接头, 密封面, 力学特性, 三维有限元分析

Abstract: Wearing of threaded connection is one of the main reasons that affect the seal integrity of casing. Due to the complex structural features of casing threaded connection, analytical solutions cannot be obtained, and relevant experimental studies are also difficult to conduct. For this reason, there were few studies on the mechanical properties of the sealing surface of threaded connection under wear conditions. In view of this, this paper established a three-dimensional elastic-plastic finite element model of casing threaded connection with uniform wear, eccentric wear and crescent wear. The ABAQUS was used to analyze the stress-strain characteristics of casing threaded connection under complex load conditions when the wear depth is 5 mm, and study the influence of three wear forms on the mechanical characteristics of the sealing surface of casing threaded connection under make up torque, axial tension and bending moment. The results show that there is a large plastic strain on the sealing surface of casing threaded connection under the condition of uniform wear, and the contact force on its sealing surface is greater than that under other wear conditions, that is, uniform worn casing threaded connection has a greater risk of seal failure. The contact area of the sealing surface of the casing threaded connection with eccentric and crescent wear is small, as well as the contact width of the narrowest part of the circular seal belt, which has a large influence on the sealing reliability of casing threaded connection.

Key words: wear, casing threaded connection, sealing surface, mechanical properties, three-dimensional finite element analysis

中图分类号:

TE931

狄勤丰, 王楠, 陈锋, 陈涛, 王文昌, 陈薇. 磨损套管螺纹接头密封面力学特性[J]. 石油学报, 2021, 42(5): 669-676.

Di Qinfeng, Wang Nan, Chen Feng, Chen Tao, Wang Wenchang, Chen Wei. Mechanical properties of the sealing surface of worn casing threaded connection[J]. Acta Petrolei Sinica, 2021, 42(5): 669-676.

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磨损套管螺纹接头密封面力学特性

Mechanical properties of the sealing surface of worn casing threaded connection

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