复合管焊接接头整管段应力腐蚀试验方法研究

doi:10.11885/j.issn.16745086.2021.04.30.09

西南石油大学学报(自然科学版) ›› 2021, Vol. 43 ›› Issue (4): 129-137.DOI: 10.11885/j.issn.16745086.2021.04.30.09

• 深层和非常规油气钻完井专刊 • 上一篇下一篇

复合管焊接接头整管段应力腐蚀试验方法研究

曾德智¹, 李祚龙¹, 李发根², 吴泽³, 闫静⁴

1. 油气藏地质及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 710077;
3. 西安向阳航天材料股份有限公司, 陕西西安 710065;
4. 中国石油西南油气田公司天然气研究院, 四川成都 610213

收稿日期:2021-04-30 发布日期:2021-08-06
通讯作者: 曾德智,E-mail:zengdezhi1980@163.com
作者简介:曾德智,1980年生,男,汉族,四川宜宾人,教授,博士,主要从事油气田腐蚀与防护、石油管力学与环境行为方面的研究工作。E-mail:zengdezhi1980@163.com
李祚龙,2000年生,男,汉族,四川南充人,硕士研究生,主要从事油气井井筒完整性及管柱腐蚀方面的研究工作。E-mail:597774728@qq.com
李发根,1985年生,男,汉族,安徽肥东人,高级工程师,硕士,主要从事油气田腐蚀与防护研究方面的研究工作。E-mail:lfg8586@163.com
吴泽,1981年生,男,汉族,四川成都人,高级工程师,硕士,主要从事双金属复合管的设计、开发、制造工艺与质量控制技术研究。E-mail:wuze@aeromat.cn
闫静,1983年生,女,汉族,河北承德人,高级工程师,博士,主要从事油气田腐蚀与防护方面的研究工作。E-mail:yan_jing@petrochina.com.cn
基金资助:
国家自然科学基金（51774249）；四川省科技计划资助（21JCQN0066）

A Study on Stress Corrosion Test Method for Welded Joint of Whole Pipe Section of Composite Pipe

ZENG Dezhi¹, LI Zuolong¹, LI Fagen², WU Ze³, YAN Jing⁴

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. CNPC Tubular Goods Research Institute, Xi'an, Shaanxi 710077, China;
3. Xi'an Sunward Aeromat Co. Ltd., Xi'an, Shaanxi 710065, China;
4. Research Institute of Natural Gas Technology, PetroChina Southwest Oil and Gas Field Company, Chengdu, Sichuan 610213, China

Received:2021-04-30 Published:2021-08-06

摘要/Abstract

摘要： 西南某高酸性气田拟采用双金属复合管作为内腐蚀控制手段，为了评估复合管焊接接头的耐腐蚀性能，根据其结构特点，建立整管段试件有限元力学模型，并通过加载应力应变测试试验验证了有限元模型的准确性，确定出焊缝合理的应力槽形式和试验总压。采用自主研制的双金属复合管整管段的腐蚀评价装置和方法，开展了X52/825冶金复合管焊接接头在苛刻应力状态和腐蚀工况下的耐蚀性能评价，结果表明，X52/825冶金复合管焊接接头在模拟工况下，经720 h腐蚀实验后，均未出现破裂或刺漏，100%射线探伤检验结果显示X52/825冶金复合管焊接接头无开裂性裂纹，具有良好的耐蚀性能。研究结果为酸性气田复合管的性能评估和安全使用提供了技术借鉴。

关键词: 高酸性气田, 双金属复合管, 焊接接头, 整管段, 应力腐蚀开裂

Abstract: A southwest high acid gas field planed to use bimetallic composite pipes as internal corrosion control means. In order to evaluate the corrosion resistance of welded joints of composite pipes, a finite element mechanical model of the whole pipe section was established according to its structural characteristics. The accuracy of the finite element model was verified by loading stress-strain test, and the reasonable form of stress groove and total test pressure of welds were determined. Finally, the corrosion resistance evaluation of welded joint of X52/825 metallurgical composite pipe under severe stress and corrosion conditions was carried out by independently developed corrosion evaluation device and method for the whole pipe section of bimetallic composite pipe. The results show that the welded joint of X52/825 metallurgical composite pipe is not cracked or punctured after 720 hours corrosion test under stimulated working conditions. The results of 100% X-ray flaw detection show that the welded joints of X52/825 metallurgical composite pipes have no cracks, showing its good corrosion resistance. The results of this research provide theory and reference for the performance evaluation and safety use of composite pipes in acid gas fields.

Key words: high acid gas field, bimetal clad pipe, welded joint, whole pipe section, stress corrosion cracking

中图分类号:

TE42

曾德智, 李祚龙, 李发根, 吴泽, 闫静. 复合管焊接接头整管段应力腐蚀试验方法研究[J]. 西南石油大学学报(自然科学版), 2021, 43(4): 129-137.

ZENG Dezhi, LI Zuolong, LI Fagen, WU Ze, YAN Jing. A Study on Stress Corrosion Test Method for Welded Joint of Whole Pipe Section of Composite Pipe[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(4): 129-137.

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复合管焊接接头整管段应力腐蚀试验方法研究

A Study on Stress Corrosion Test Method for Welded Joint of Whole Pipe Section of Composite Pipe

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