The mechanism of casing failure is analyzed in detail, the diagnosis and prevention for unknown well casing failure are the key for controlling the rising of casing failure speed.
详细剖析套损形成机理，对未知井套管情况进行差别和预防是控制套损上升速度的关键。
The main failure form of V-round-thread casing, that is, the mechanism of thread connection slipping off, is analyzed in this paper.
本文对V形圆扣套管联接强度失效的主要形式，即套管联接螺纹滑扣(或滑脱)失效的机理进行了分析研究。
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