固井时水泥浆以紊流状态上返，能提高对钻井液的顶替效率，从而提高固井质量，这早已在理论上和实践中得到证实。但紊流顶替也带来许多问题，如松南地区钻井最大返速在1．6m／s左右，而实现紊流顶替的返速平均为2．35m／s左右。为了达到紊流顶替，要求排量增大，带来的主要问题 In cementing, the turbulent flow on the grout can improve the replacement efficiency of the drilling fluid and improve the cementing quality, which has already been verified theoretically and practically. However, the replacement of turbulence also poses many problems. For example, the maximum return velocity of drilling in Songnan area is about 1.6m / s, while the average return velocity for achieving turbulence replacement is about 2.35m / s. In order to achieve the replacement of turbulence, requiring increased displacement, the main problems