摘要
对失效钻杆的断口形貌、金相组织、化学成分和力学性能进行了分析,结合钻杆的受力状态分析,推断出钻杆的断裂原因。在弯曲、拉压、扭转、冲击、振动等交变载荷的复合作用下,在钻杆外表面的腐蚀坑底部产生疲劳裂纹,随着裂纹的不断扩展,导致钻杆腐蚀疲劳断裂。
This paper contains a detailed experiment analysis on the fracture section characteristic, metallographic organization, chemic consists and mechanics property of a drill pipe and a set of analysis calculation on the mutative load which putting on the drilling pipe. Through analysis, this paper deduce the reason that result the drilling pipe fracture as following： under the action of the bend stress, tension and compress stress, torsion, impaction and vibration, fatigue crack come into being on the out surface corrosive dent section, as a final result, the drilling pipe corrosive fatigue fracture.
出处
《石油矿场机械》
2007年第5期58-61,共4页
Oil Field Equipment
关键词
钻杆
交变栽荷
腐蚀
疲劳断裂
drilling
mutative load
corrosion
fatigue fractureh
