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在设计阶段应该按照流变和水力参数的综合标准来优选钻井液，满足钻井水力循环的各项组成要素，从而提高钻速、井眼净化能力和循环完整性。在介绍流举模型的基础上，对采取优化方法的设计泥浆和不同n值的优化泥浆进行了对比。对于优化泥浆，n值越低；则钻柱压降越低，钻头压降越大，钻头水马力越高，相应地钻头比水马力也就越高。同时，泥浆的视粘度降低；最终导致了钻速的升高。
During the design phase, the drilling fluid should be optimized according to the comprehensive criteria of rheology and hydraulic parameters to meet the components of the drilling hydraulic cycle, thereby enhancing the drilling rate, wellbore purification capacity and cycle integrity. Based on the introduction of the flow model, a comparison is made between the design muds and the optimized n-value slurries using the optimization method. For the optimization of the mud, the lower the value of n; the lower the pressure drop of the drill string, the greater the bit pressure drop, the higher the bit horsepower, the higher the bit bit than the water horsepower. At the same time, the apparent viscosity of the mud decreases; eventually leading to an increase in the rate of penetration.