In ordinary stripping operations, the pipe falls into the wellbore under its own weight, and no additional downward force or pushing is required.

在平常的不压井起下钻作业中，管柱下入井眼是依靠其自身重量，不需要附加的向下载荷或者推力。

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Moreover, the effect of real gas for small angle-of-attack case results in small downward force moment, whereas that for large angle-of-attack case results in small upward force moment.

此外，小攻角时真实气体效应产生小低头力矩，而大攻角时产生小抬头力矩。

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Moreover, the effect of real gas for small angle-of-attack case results in small downward force moment, whereas that for large angle-of-attack case results in small upward force moment.

此外，小攻角时真实气体效应产生小低头力矩，而大攻角时产生小抬头力矩。

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