Secondary cementing is any cement job that occurs after primary cementing and is called remedial cementing.
二次注水泥在初次注水泥以后进行，并称为补注水泥。
A component installed near the bottom of the casing string on which the cement plugs land during the primary cementing operation.
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。
During the primary cementing process, usually we pump some fluid with special technical performance between mud and cement slurries. It is called ahead fluid.
在油气井注水泥作业中，常常需要在水泥浆与泥浆之间注入一段具有特殊技术性能流体，这段流体就称为前置液。
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