Journal of Shanghai University(Natural Science Edition) ›› 2020, Vol. 26 ›› Issue (2): 163-180.doi: 10.12066/j.issn.1007-2861.2208

• Invited Review • Previous Articles     Next Articles

Research progress on the mechanical properties of threaded connections for oil country tubular goods

DI Qinfeng1, WANG Nan1, CHEN Feng1(), WANG Wenchang1, NIU Xinming2, ZHANG Jincheng2   

  1. 1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China
    2. Sinopec Research Institute of Petroleum Engineering, Beijing 100101, China
  • Received:2020-01-10 Online:2020-04-30 Published:2020-04-29
  • Contact: CHEN Feng E-mail:chenfeng536@126.com

Abstract:

With the increase in reservoir depth, the drilling and production conditions under which oil and gas are processed are becoming increasingly severe. Complex loads, including huge tension, significant compression, considerable bending, high internal and external pressure, and high temperature, cause the frequent failure of oil country tubular goods (OCTG). Threaded connection failure is one of the main failures encountered in oil fields, and increasing attention has been paid to the development of threaded connections with improved strength and sealing performance. As one of the vital works in the development of premium threaded connections, the analysis methodology governing the mechanical properties of threaded connections needs to be solved urgently. In this paper, the research progress concerning the mechanical properties of threaded connections is described from the aspects of three methods: analytical, experimental, and numerical simulation. The mechanical properties, test methods, equipments, and numerical simulation methods of OCTG threaded connections are described. Based on the summary and analysis of the shortcomings of the current works, the new future research direction for threaded connections has been suggested.

Key words: threaded connections, mechanical properties, analytical method, experimental method, numerical simulation

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