摘要
在热采井工况下,套管接头将承受超越弹性极限的载荷及循环塑性变形。现有的试验标准,如ISO 13679或API RP 5C5,难以满足热采井用特殊螺纹接头适用性评价及设计开发的需求。随着标准的发展,ISO 12835成为评价特殊螺纹接头使用性能的国际标准。该标准规定了大量的有限元分析内容作为实物试验的依据。为满足标准要求,通过一种热采井特殊螺纹接头的有限元分析,阐述了相关有限元分析方法。通过不同公差配合的模型,筛选出了实物试验样品的公差配合形式。分析结果表明,降温时产生的轴向拉伸载荷对接头的密封性能有着较大影响。在进行接头设计时,应提高拉伸载荷下接头的结构稳定性,降低对密封性能的影响。
In the thermal well,the casing connection will bear the extreme load beyond the elastic limit and cyclic plastic deformation.The existing test standards,such as ISO 13679 or API RP 5C5,are difficult to meet the requirements of applicability evaluation and design&development of premium connection for the thermal well.With the development of standard,ISO 12835 has become an international standard to evaluate the performance of premium connection.A large number of finite element analysis contents are stipulated in the standard as a basis for physical test.In order to meet the requirements of the standard,this paper describes the relevant finite element analysis method through the finite element analysis of one premium connection.Through the models of different tolerance fit,the form of tolerance fit of test specimens are selected.The results also show that the axial tensile load generated during cooling has a great influence on the sealing performance of the joint.In the joint design,attention should be paid to improving the structural stability of the joint under tensile load and reducing the influence on the sealing performance.
作者
陈玉鹏
杨腾飞
闫龙
吕春莉
CHEN Yupeng;YANG Tengfei;YAN Long;LYU Chunli(Tianjin Pipe Corporation,Tianjin 300300,China)
出处
《石油管材与仪器》
2021年第3期67-72,共6页
Petroleum Tubular Goods & Instruments
基金
国家重点研发计划项目“石油天然气工业非API石油专用管质量基础设施关键技术体系研究”(编号:2019YFF0217500-2019YFF0217503)。
