As drilling operations move to deep water, subsea wellhead bears complex stress because it joins the marine riser and casing string. The stability of subsea wellhead becomes increasingly concerned.
深水钻井水下井口上部连接防喷器组及隔水管,下部连接套管串,在钻井作业过程中承受复杂的作用力,一旦发生井口失稳,将会带来严重后果。
参考来源 - 深水钻井井口力学分析及导管承载能力研究Compared the calculating results by FEM (Finite Element Method), those formulas were true. Those formulas give simple methods to design optimally casing string.
通过与有限元法的模拟结果比较以及实验数据证明，文中的理论公式是正确的，为套管柱优化设计提供了简便的方法。
参考来源 - 油层段套管损坏机理研究·2,447,543篇论文数据，部分数据来源于NoteExpress
A tapered, often bullet-nosed piece of equipment often found on the bottom of a casing string.
一种锥型，通常是圆头引导器形状的器件，一般出现在套管柱的最下端。
Sea water is used as displacement fluid, which can provide the floating force of casing string.
采用海水顶替液，实现套管的浮力漂浮。
A mill is usually used to remove junk in the hole or to grind away all or part of a casing string.
铣鞋通常用于除去井下的碎屑或者研磨掉整个或部分套管。
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