基于特殊螺纹密封完整性的三轴设计系数研究

doi:10.11885/j.issn.1674-5086.2020.05.19.01

西南石油大学学报(自然科学版) ›› 2022, Vol. 44 ›› Issue (4): 165-173.DOI: 10.11885/j.issn.1674-5086.2020.05.19.01

基于特殊螺纹密封完整性的三轴设计系数研究

王建东^1,2, 林元华¹, 李玉飞³, 谢南星³, 邓宽海¹

1. 油气藏地质与开发工程国家重点实验室 · 西南石油大学, 四川成都 610500;
2. 中国石油石油管工程技术研究院, 陕西西安 710050;
3. 中国石油西南油气田分公司工程技术研究院, 四川成都 610017

收稿日期:2020-05-19 发布日期:2022-07-28
通讯作者: 邓宽海,E-mail:khdeng98@163.com
作者简介:王建东,1972年生,男,汉族,陕西西安人,教授,硕士,主要从事油井管与管柱力学方面的研究。E-mail:wjd233@163.com
林元华,1971年生,男,汉族,四川宜宾人,教授,博士生导师,博士,主要从事油气井建井工程、油气安全工程、石油工程腐蚀与防护、井筒完整性等方面的科研和教学工作。E-mail:yhlin28@163.com
李玉飞,1981年生,男,汉族,河南上蔡人,高级工程师,主要从事油完井试油和井完整性方面的研究。E-mail:l_yf@petrochina.com.cn
谢南星,1963年生,汉族,四川射洪人,高级工程师,主要从事油气田开发方面的研究。E-mail:13980105159@139.com
邓宽海,1988年生,男,汉族,四川内江人,副研究员,博士,主要从事油气井工程力学、油气安全工程及井筒完整性等方面的科研和教学工作。E-mail:khdeng98@163.com
基金资助:
国家科技重大专项（2016ZX05052）；陕西省科技统筹创新工程计划项目（2015KTTSGY06-02-02）

A Study on Tri-axial Design Coefficient Based on Seal Integrity of Premium Connection

WANG Jiandong^1,2, LIN Yuanhua¹, LI Yufei³, XIE Nanxing³, DENG Kuanhai¹

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Tubular Goods Research Institute, CNPC, Xi'an, Shannxi 710050, China;
3. Engineering Technology Research Institute, Southwest Oil and Gas Field Company, CNPC, Chengdu, Sichuan 610017, China

Received:2020-05-19 Published:2022-07-28

摘要/Abstract

摘要： 针对高温高压气井完井油管柱密封完整性问题，开展了基于88.90 mm×6.45 mm 110SS材料油管一种气密封特殊螺纹密封完整性分析的管柱三轴设计系数研究，研究中采用了API RP 5C5—2017国际标准螺纹性能试验评价方法，进行了高温和室温环境下A系全包络线载荷密封实验评价。基于气密封能判据，采用有限元模拟分析了不同VME（冯米塞斯等效应力）全包络线载荷2次循环工况的密封能和密封能倍数的变化规律并确定了危险载荷点。结果表明，通过API标准密封完整性实验评价的气密封特殊螺纹连接，需采用有限元进一步分析包络线载荷循环密封能及密封能倍数的变化规律，确定这种螺纹连接安全适用范围；同时开展了3种VME全包络线载荷2次循环后密封适用性分析，确定了高温和室温两种环境下螺纹安全适用包络线载荷范围及合理的三轴安全系数，并完成了1口高温高压气井完井油管柱安全分析和现场应用。提出的研究方法为管柱三轴设计安全系数的确定提供了有益指导。

关键词: 气密封特殊螺纹, 包络线载荷, 密封能, 密封能倍数, 密封完整性, 适用性分析

Abstract: Aiming at the sealing integrity problem of tubing string in high temperature and high pressure gas well completion, the research on the tri-axis design coefficient of string is carried out based on the integrity analysis of a premium connection of gas seal on the 88.90 mm×6.45 mm 110SS steel grade tubing. In this study, API RP 5C5-2017 international standard connection performance test evaluation method is used to evaluate the load sealing test of a series full envelope under high temperature and room temperature environment. The dangerous load point and variation laws of seal energy and seal energy multiple are analyzed after second-time full envelope load cycles with different full envelope load (VME95% and VME 90%) according to gas seal energy criterion. Results show the seal energy and seal energy multiple as well as its variation law have to be further analyzed under full envelope load cycle by FEA, by which the safety applicable envelope load range need to be determined, although the gas seal premium connection has been evaluated by API standard seal integrity test. Therefore, the serviceability analysis of sealing performance has been performed after second-time full envelope load cycles with three kinds of full envelope load based on the full envelope load test evaluation and finite element simulation, and the safety applicable envelope load range and reasonable tri-axial safety factor have been determined under high temperature and ambient temperature environment. The research results have been applied successfully in some HTHP gas well. The research method presented in this paper provides useful guidance for the determination of safety factor of tri-axial design of tubing string.

Key words: gas seal premium connection, envelope load, seal energy, seal energy multiple, sealing integrity, serviceability analysis

中图分类号:

TE375

王建东, 林元华, 李玉飞, 谢南星, 邓宽海. 基于特殊螺纹密封完整性的三轴设计系数研究[J]. 西南石油大学学报(自然科学版), 2022, 44(4): 165-173.

WANG Jiandong, LIN Yuanhua, LI Yufei, XIE Nanxing, DENG Kuanhai. A Study on Tri-axial Design Coefficient Based on Seal Integrity of Premium Connection[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(4): 165-173.

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基于特殊螺纹密封完整性的三轴设计系数研究

A Study on Tri-axial Design Coefficient Based on Seal Integrity of Premium Connection

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