用350吨卡瓦式吊卡下套管。

Run casing with the 350t slip elevator.

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分析卡瓦内悬挂管柱的承载能力，对油井特别是深井和超深井的套管柱设计十分重要。

It is very important for the designs of well casing strings, especially for those of deep Wells and super deep Wells to analyze the load bearing capacity of tub es inside slips.

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然而卡瓦和套管间形成非常复杂的接触压力，从理论上直接研究非常困难。

However the contact stress between slips and casing is very complex, it is extremely difficult to study directly in theory.

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