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提供了一种既能保证套管居中，又能产生水泥浆环空螺旋流的套管弹性旋流扶正器。在实验的基础上对该种扶正器所产生的旋流规律进行了详细的分析；得出了各种不同因素对旋流的影响规律；建立了旋流长度及旋流周向速度的计算公式，为分析旋流段水泥浆顶替效率奠定了基础。现场实践表明，依据本文理论所设计的工具对提高顶替效率、固井质量具有良好的效果
The invention provides a sleeve elastic swirl centralizer capable of ensuring that the casing is centered and can generate an annular spiral flow of cement slurry. On the basis of experiments, the swirl law of the kind of centralizer was analyzed in detail. The influence of various factors on the swirl was obtained. The formula of swirl length and swirl flow velocity was established , Which laid the foundation for analyzing the displacement efficiency of the cement slurry in the swirling section. Field practice shows that the tools designed according to the theory of this paper have good effects on improving replacement efficiency and cementing quality