Theoretical solution of casing loading in nor-uniform ground stress field
Theoretical solution of casing loading in nor-uniform ground stress field
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发表时间：
2007
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通讯作者：
Zhang Jian-hua
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作者：
Zhang Jian-hua
从非均匀地应力产生的原因出发，联合收割机结合钻井工程的实际情况，讨论了固井后套管边界上的应力分布，并建立了非均匀地应力下套管的力学模型，采用弹性理论的逆解法求出了该问题的解析解，在此基础上，根据套管应力分布规律，提出了非均匀加载等效均匀加载的方法，以及非均匀地应力下套管抗挤强度的计算方法，在含有断层（如磨损和残余应力区）的均匀地应力中结合抗挤强度。
From the creation reason of nor-uniform ground stress,combine the actual circumstance of the drilling engineering,discuss stress distribution on the casing boundary after cementing,and build up casing mechanical model in nor-uniform ground stress,adopt inverse method of elasticity theory to figure out analytic solution of this problem.On the foundation,develop a method of nor-uniform loading equivalent uniform loading according to the casing stress distribution regular,And collapsing strength calculation method in nor-uniform ground stress,combining collapsing strength in the uniform ground stress containing faults(such as wear and tear and remnant stress ere).