摘要
扶正器是旋转导向与随钻测井工具中的关键部件。其失效会直接导致工具功能丧失并造成经济损失。针对某钻井作业中发生的扶正器开裂失效案例,通过宏观形貌观察、微观断口分析、化学成分检测、硬度测试、金相组织观察、力学性能测试及耐点蚀试验等方法,系统分析了其失效机理。结果表明,该扶正器断裂性质为多源腐蚀疲劳断裂,疲劳源源于内表面点蚀坑;基体材料组织异常,存在粗大索氏体与过量自由铁素体,导致力学性能和耐腐蚀性能下降。建议采用定制模锻坯料并优化激光熔覆工艺,以提升扶正器的可靠性,延长其使用寿命。
The stabilizer is a key component in rotary guidance and logging tools,and its failure can directly lead to the loss of tool function and economic losses.In response to a case of stabilizer cracking failure that occurred during a drilling operation,the failure mechanism was systematically analyzed through macroscopic morphology observation,microscopic fracture analysis,chemical composition testing,hardness testing,metallographic structure observation,mechanical performance testing,and pitting corrosion resistance testing.The results indicate that the fracture property of the stabilizer is multi-source corrosion fatigue fracture,and the fatigue source comes from the pitting corrosion pits on the inner surface.The abnormal microstructure of the matrix material,including coarse martensite and excessive free ferrite,leads to a decrease in mechanical properties and corrosion resistance.It is recommended to use customized forging blanks and optimize the laser cladding process to improve the reliability of the stabilizer and extend its service life.
作者
赵越
齐波
袁伟
王仡仡
ZHAO Yue;QI Bo;YUAN Wei;WANG Yiyi(Well-Tech Division of China Oilfield Services Limited,Langfang 065201)
出处
《现代制造技术与装备》
2026年第1期68-71,共4页
Modern Manufacturing Technology and Equipment
关键词
扶正器
激光熔覆
疲劳断裂
腐蚀疲劳
stabilizer
laser cladding
fatigue fracture
corrosion fatigue
