在下入表层套管且注水泥之前，方井同样接受从井眼内返出的、必须被泵回到地表泥浆设备中的泥浆。
Prior to setting surface casing, the cellar also takes mud returns from the well, which are pumped back to the surface mud equipment.
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.
最后得出结论——振动注水所产生的脉动压力不会对套管、水泥环及地层造成损坏。
Finally, the conclusion is that the pulse pressure caused by vibrated water injection can not damage to casing pipe, cement sheath and formation.
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