It conductives to a better understanding of differential pressure sticking.
这有利于对压差卡钻进行更深刻的认识。
Differential pressure sticking is the most one common sticking, it brings great harm to the petroleum drilling.
压差卡钻是最常见的卡钻事故之一，它给石油钻探工业带来了巨大的危害。
Because its rigidity are less than the drill collar, less contact area with wall of a well, is also not easy to form differential pressure sticking.
由于其刚性比钻铤少，和井壁接触面积小，也不容易形成压差卡钻。
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