φ22mm D级抽油杆失效原因分析  

Failure Analysis of φ22 mm D Sucker Rod

作　　者：田伟[1] 赵雪会[1] 白真权[1] 苗健[1] 

机构地区：[1]中国石油天然气集团公司管材研究所,西安710065

出　　处：《石油矿场机械》2008年第12期52-55,共4页Oil Field Equipment

摘　　要：通过理化性能检测评价和采用扫描电镜微观分析方法对φ22 mm D级抽油杆发生的断裂、偏磨及腐蚀的失效进行了分析研究。结果表明:材质符合SY/T5029—2003标准要求;由于热处理工艺不当在组织中出现脱碳层,杆体韧性偏低,在交变载荷、偏磨及腐蚀共同交互作用下发生了腐蚀疲劳断裂;腐蚀主要因素是硫化物及硫酸盐还原菌所形成的H2S及高含氯离子共同形成的腐蚀。The fracture,abrasion and corrosion,causing sucker rod failure,have been analyzed by physical and chemical inspection and means of SEM.The result showed that the material properties of this sucker rod conform to SY/T5029—2003 standard.The fracture of this sucker rod was corrosion fatigue failure,under interacting of alternate load,abrasion and corrosion,because of its lower malleability and decarburized layer in the structure,which resulted from incorrect heat processing.The main reason of corrosion of this sucker rod was H2S,formed by sulfide and sulfate reduction bacterium,and rich Cl-in this tube.

关 键 词：抽油杆 腐蚀 失效 

分 类 号：TE933.2[石油与天然气工程—石油机械设备]