在要被注水泥的地层的上面坐封一个可收回封隔器或可钻封隔器。
A retrievable or drillable packer is set above the formation to be cemented.
在井内坐封一个封隔器，然后沿油管向下注入水泥浆并使它进入地层的挤水泥过程。
A cement squeeze process during which a packer is set in the well and the slurry is pumped down the tubing and into the formation.
使用双封隔器选择性封隔地层是这两种仪器的特色。
Their characteristic is that they can isolate layers selectively.
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