偏心环空旋转套管流场及对注水泥顶替效率的影响

The Rotating Casing Flow Field in Eccentric Annuli and Its Effecting on Displacement Efficiency of Cementing

利用流体力学理论推导了幂律流体在楔形区域中的流动方程，利用这一方程，分析研究了旋转套管时，水泥浆及泥浆在偏心环空中形成的流场。

In this paper, using the fluid mechanicstheory,the flow equations have been proposed forthe power law fluid in the Cuneiform area,using theflow equations, the flow fields have been analysedwhich is produced by the muds and the cement slur-ries when rotating the Casing,The conclusions havebeen obtained that the fluids in the annlus can be-come the shear states while rotating the casing, theback flows can be formed at the outside of the wideclearance in the annulus while rotating the casing,the gelatination structures of the mud are de-stroied,the bypassed muds are cleared up in thenarrow charance of the annulus and the displace-ment efficiency of the cementing is raised.