旋转套管可以有效提高水泥浆顶替效率，从而提高固井质量。
Rotating casing is helpful to improve effectively mud displacement efficiency and thus improve cementing quality.
如何提高水泥浆顶替效率及固井质量是该井固井成功的关健。
How to improve cement slurry displacement efficiency and cementing quality are cementing successful key of the well.
同时优选水泥浆体系，选择合适的水泥外加剂，合理调整水泥浆流变性，提高了顶替效率。
The displacement efficiency was raised through optimizing slurry system, selecting suitable cement additives and adjusting reasonably slurry rheological property.
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