钢管2025，Vol.54Issue(6)：43-49,7.DOI:10.19938/j.steelpipe.1001-2311.2025.6.43.49
基于应力-应变设计的热采井套管及热应力分析
Stress-strain-based Design for Thermal Well Casing and Thermal Stress Analysis
MA Ji 1ZHANG Xu 2ZHOU Jiaxiang 2SUN Zhuonan2
作者信息
- 1. Sinopec China Northwest Oilfield Company,Urumqi 830011,China
- 2. Tianjin Pipe Corporation,Tianjin 300301,China
- 折叠
摘要
Abstract
It is impossible to evaluate the safety of the casing string after the yield strength point just by means of the conventional method for stress design and check of the casing string that adopts the yield strength of the casing as the design index.Addressing the fact that some damages of the casing are caused by rather high thermal stress during the ultra-heavy oil thermal recovering process,taking the TP110H steel as an example,a stress-strain double index design method is established to form a judgment criteria with the total strain less than the allowable strain,which not only meets the stress check of the string,but also breaks through the use limit of the casing strain,changing from elasticity to elastoplasticity.It is found via relevant research that the casing material exhibits creep effect and stress relaxation effect at high temperature,which greatly affects the thermal stress of the string during gas injection,well plugging and oil pro-duction.Since the creep strain is an important part of the total strain,the tensile stress in the oil production process can be effectively evaluated by means of integrating stress relaxation into the analytical calculation.关键词
套管/热采井/应力/应变/热应力Key words
casing/thermal well/stress/strain/thermal stress引用本文复制引用
MA Ji,ZHANG Xu,ZHOU Jiaxiang,SUN Zhuonan..基于应力-应变设计的热采井套管及热应力分析[J].钢管,2025,54(6):43-49,7.
