多级注水泥作业用来在对长套管柱注水泥时避免使地层破裂。
A multistage cement job is used to avoid fracturing the formation when cementing long casing strings.
一种装置，用于在注水泥作业过程中悬挂胶塞，直到将其释放并在注水泥作业中沿套管内泵入。
A device used to hold plugs until they are released and pumped down the casing during cementing operations.
安装在套管柱底部附近的一个部件，在初次注水泥作业期间水泥塞坐放于其上。
A component installed near the bottom of the casing string on which the cement plugs land during the primary cementing operation.
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