某采气井在生产运行三年多时，单井支线与集气干线连接的三通发生了爆管事故，对事故原因进行分析。结果表明，三通爆管是由管壁腐蚀减薄导致管体无法承压引起的，而管壁腐蚀是由 CO2腐蚀、高速流体冲刷、局部紊流冲蚀及电偶效应共同作用的结果，其中局部紊流和电偶效应是造成管壁腐蚀减薄穿孔直至爆管的主要原因。为控制电偶腐蚀的发生，应避免电位不同的两种金属或合金的接触。
After 3 years production running of a gas recovery well,a blast accident of the tee tube connecting the single well branch and gas collecting main happened.The causes were studied.The results showed that the blast accident was caused by pipe wall corrosion thinning resulting in overpressure of the pipe body.The corrosion of the pipe resulted from CO2 corrosion,high velocity erosion,local turbulent erosion and bimetallic effect.Local turbulent erosion and bimetallic effect were the main causes of the pipe wall corrosion thinning and bursting.In order to control the occurrence of bimetallic corrosion,the contact of two kinds of metal or alloy with different potentials should be avotd.
参考文献
| [1] | 班兴安,蒋小兰,黄琼,王旭辉.迪那2气田地面集输及处理工艺技术[J].石油规划设计,2009(06):25-28. |
| [2] | 李廷取,吴化,李雪松.天然气输气管线钢的CO2腐蚀行为[J].腐蚀与防护,2008(05):260-263. |
| [3] | 范志刚,李翠楠,王燕,魏武,许期聪.流速对天然气输气管道腐蚀的影响规律研究[J].钻采工艺,2010(02):88-90. |
| [4] | 陈浩,江胜飞,古丽,江胜涛,王亚丽.高温高压含CO2气田油气混输管道失效分析[J].腐蚀与防护,2013(02):185-188. |
| [5] | 叶帆,李新勇,刘强,高秋英.雅克拉气田集输管线的腐蚀及其防治[J].腐蚀与防护,2008(11):710-712. |
| [6] | 蔡锐,韩燕,常泽亮,林冠发,尹成先.高流速凝析气田地面管线腐蚀原因分析[J].机械工程材料,2011(05):86-89. |
| [7] | 叶帆.介质流态对凝析气集输管道的腐蚀影响分析[J].天然气与石油,2009(06):22-25. |
| [8] | 陈孙艺.流体对管件冲蚀的研究和防护[J].石油化工腐蚀与防护,2003(05):59-62. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%