A casing string that does not extend to the top of the wellbore, but instead is anchored or suspended from inside the bottom of the previous casing string.

不延伸到井眼顶部的套管柱，而是锚定或者悬挂于先前已经下入的套管内。

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A full-sized length of casing placed at the bottom of the casing string that is usually left full of cement on the inside to ensure that good cement remains on the outside of the bottom of the casing.

一根放置于套管柱最下端的全尺寸长度的套管，通常里面装满水泥，以确保套管外能够完全充满水泥。

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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。

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