理化检验-物理分册2026，Vol.62Issue(4)：72-77,6.DOI:10.11973/lhjy-wl250025
某井S135钢钻杆断裂原因
The fracture reason of an S135 steel drill pipe in a well
杨婷 1徐示强 2谭海桂 1张国正1
作者信息
- 1. 西安摩尔石油工程实验室股份有限公司,西安 710065
- 2. 西部钻探管具与井控技术服务分公司,克拉玛依 834000
- 折叠
摘要
Abstract
During the operation of a well,the drill pipe was stuck,and the fracture accident of S135 steel drill pipe occurred during the unlocking process.The causes of drill pipe fracture were analyzed by means of macroscopic observation,chemical composition analysis,metallographic examination,mechanical property test,scanning electron microscope and energy spectrum analysis.The results show that during the service process,the friction heat was generated by the friction between the drill pipe and the borehole wall,and the temperature exceeded the phase transition temperature of the material,which caused the material to undergo austenite transformation and form a banded structure of proeutectoid ferrite and martensite,resulting in a decrease in the mechanical properties of the material.The cooling rate of the inner and outer walls of the drill pipe was different.Under the combined action of structural stress and thermal stress,the hydrogen atoms in the material accumulated and diffused in the martensite strip near the inner wall,resulting in stepped cracks in the material,which eventually led to the fracture of the drill pipe.关键词
钻杆/断裂/摩擦磨损/相变/力学性能Key words
drill pipe/fracture/friction and wear/phase transformation/mechanical property分类
通用工业技术引用本文复制引用
杨婷,徐示强,谭海桂,张国正..某井S135钢钻杆断裂原因[J].理化检验-物理分册,2026,62(4):72-77,6.
