某油管柱穿孔断裂的原因
Reasons for Perforation and Fracture of a Tubing String
刘雄伟 1李芳 2张江江 2刘晓童 3杨志文 3唐志 1吕茂山1
作者信息
- 1. 中国石油化工股份有限公司西北油田分公司,乌鲁木齐 830011
- 2. 中国石油化工股份有限公司西北油田分公司,乌鲁木齐 830011;中国石油化工集团公司碳酸盐岩缝洞型油藏提高采收率重点实验室,乌鲁木齐 830011
- 3. 安科工程技术研究院(北京)有限公司,北京 102209
- 折叠
摘要
通过对断裂油管进行断裂特征分析、材料性能分析和载荷分析,结合服役环境和运行情况,研究了该油管断裂的原因.结果表明,该油管中硫含量超标,其他元素含量、显微组织、力学性能等都符合标准要求.从断裂特征分析可知,断口表现为韧性断裂特征,无明显腐蚀.通过载荷计算可知,当断裂油管附近套管出现漏点时,环空和地层形成压差,油管在压差作用下与套管接触,在附加应力作用下油管上下移动,不断磨损,最终穿孔断裂.
Abstract
The fracture causes of a tubing was studied through analysis of fracture characteristics,material properties and load,combined with service environment and operation conditions.The results show that the sulfur content in oil tubing exceeded the standard,but content of other elements,microstructure and mechanical properties of the fractured tubing met the standard requirements.It was found that the fracture was characterized by ductile fracture without obvious corrosion from the analysis of fracture characteristics.According to the load calculation,when there was a leakage point in the casing near the fractured tubing,a pressure difference between the annulus and the formation formed.The tubing contacted with the casing under the action of pressure difference,and was worn constantly by moving up and down under the action of additional stress.Finally it was perforated and fractured.
关键词
P110S油管/断裂/磨损/失效分析Key words
P110S tubing/fracture/wear/failure analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据