理化检验-物理分册2024，Vol.60Issue(3)：45-48,4.DOI:10.11973/lhjy-wl202403011
抽油杆断裂原因
Reasons for the fracture of the sucker rod
陈小琴 1杜志杰 2李欢2
作者信息
- 1. 中海油田服务股份有限公司, 天津 300459
- 2. 西安摩尔石油工程实验室股份有限公司, 西安 710065
- 折叠
摘要
Abstract
The sucker rod in a certain oilfield frequently fractured.The causes of the fracture of the sucker rod were analyzed using methods such as macroscopic observation,chemical composition analysis,mechanical property testing,metallographic examination,scanning electron microscopy and energy spectrum analysis.The results show that the fracture property of the sucker rod was corrosion fatigue fracture.After adopting deep pumping process,the sucker rod was subjected to a larger tensile load,which increased the average stress of the sucker rod and shortened its fatigue life.The oil well contained hydrogen sulfide,which caused corrosion on the outer wall of the sucker rod,led to the formation of corrosion pits on the outer wall of the sucker rod.The stress concentration at the bottom of the corrosion pit was relatively high.Under the action of alternating loads,micro cracks were generated at the bottom of the corrosion pit,which continuously expanded and ultimately caused the sucker rod to fracture.关键词
抽油杆/断裂/腐蚀疲劳/深抽工艺Key words
sucker rod/fracture/corrosion fatigue/deep pumping process分类
通用工业技术引用本文复制引用
陈小琴,杜志杰,李欢..抽油杆断裂原因[J].理化检验-物理分册,2024,60(3):45-48,4.
