本文指出:①泥浆必须具备减少循环系统(通道)的压力损失,提高携带岩粉的能力,保持孔壁稳定的流变特性和良好的剪切稀释、润滑性能,以及较低的比重和固相含量;②不同种类的流体,当处于不同的通道位置时,Re和Z值应有各自的计算公式,而且用Z值来断定泥浆由层流过渡到紊流的流态,与实际情况更相符合。 This paper points out that: (1) Slurry must have the ability of reducing the pressure loss of circulatory system (channel), improving the ability to carry rock dust, maintaining the stable rheological property of pore wall, good shear dilution and lubrication performance, low specific gravity and solid phase Content; ② different types of fluids, when in a different channel position, Re and Z values ​​should have their own formula, and Z value to determine the transition from laminar to turbulent flow of the fluid state, and more in-phase meets the.