[1]鲜 宁,等.连续油管在酸性环境下的弯曲疲劳寿命研究[J].焊管,2020,43(1):15-19.[doi:10.19291/j.cnki.1001-3938.2020.01.003]
　XIAN Ning,JIANG Fang,et al.Research on the Bend Fatigue Life of the Coiled Tubing Exposed to Sour Environments[J].,2020,43(1):15-19.[doi:10.19291/j.cnki.1001-3938.2020.01.003]
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连续油管在酸性环境下的弯曲疲劳寿命研究()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
43
期数:
2020年第1期
页码:
15-19
栏目:
试验与研究
出版日期:
2020-01-28

文章信息/Info

Title:
Research on the Bend Fatigue Life of the Coiled Tubing Exposed to Sour Environments
文章编号:
10.19291/j.cnki.1001-3938.2020.01.003
作者:
鲜 宁1;  2; 姜 放1; 荣 明1;  2; 张 平3; 邹先雄3; 崔 磊1;  2
1. 中国石油集团管力学与环境重点实验室四川分室， 成都 610041；
 2. 中国石油工程建设公司西南分公司， 成都 610041；
 3. 中国石油川庆钻探工程公司， 成都 610051
Author(s):
XIAN Ning1;  2;  JIANG Fang1;  RONG Ming1;  2;  ZHANG Ping3;  ZOU Xianxiong3;  CUI Lei1;  2
1. Sichuan Research Division of CNPC Key Lab for Mechanical and Environment Behavior of Tubular Goods, Chengdu 610041，China;
2. China Petroleum Engineering & Construction Corp, Southwest company, Chengdu 610041，China;
3. CNPC Chuanqing Drilling Engineering Company Limited , Chengdu 610051，China
关键词:
连续油管; 弯曲; 腐蚀; 疲劳; H2S
Keywords:
coiled tubing;  bend;  corrosion;  fatigue;  H2S
分类号:
TG174.3
DOI:
10.19291/j.cnki.1001-3938.2020.01.003
文献标志码:
A
摘要:
为了准确评价连续油管在酸性环境下的腐蚀疲劳寿命，对CT80钢级Φ38.1 mm×3.18 mm的连续油管管段在不同条件下进行了弯曲腐蚀疲劳试验。结果显示：经过酸性腐蚀环境的浸泡后，连续油管的弯曲疲劳寿命显著下降，约为大气环境下弯曲疲劳寿命的34.6%~45.2%，其平均值约为39.7%；对于未出现HIC的连续油管，在酸性腐蚀环境下起下不同井次后，连续油管的总疲劳寿命相近。连续油管经腐蚀浸泡取出在大气环境中放置24 h后，氢原子从连续油管管体溢出，塑性部分回升，约为大气环境下弯曲疲劳寿命的68.9%。
Abstract:
In order to accurately evaluate the corrosion fatigue life of the coiled tubing in acid environment，CT80 steel Φ38.1 mm×3.18 mm of the coiled tubing section bending corrosion fatigue tests have been carried out under different conditions. The results showed that the bending fatigue life of the coiled tubing decreased significantly after immersing in acid corrosion environment，which was about 34.6%~45.2% of the bending fatigue life in atmospheric environment， and the average value was about 39.7%. For the coiled tubing without HIC，the total fatigue life of the coiled tubing was similar after the different well runs in acid corrosion conditions. After the coiled tubing soaked in the corrosive solution is taken out and placed in the atmospheric environment for 24 hours，hydrogen atoms escaped from the coiled tubing body，and the plastic part recovered, approximately 68.9% of the bending fatigue life in the atmosphere.

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备注/Memo

备注/Memo:
收稿日期：2019-09-04
基金项目： 国家863重大专项“大型油气田及煤层气开发”（项目编号2016 ZX 05023006-005）。
作者简介：鲜  宁（1980—），男，重庆市人，硕士，高级工程师，主要从事材料的腐蚀与防护技术研究。
更新日期/Last Update: 2020-02-21