文中详细介绍导向钻井系统在港深24 - 26井的应用情况、钻具组合、参数优选，并进行效果分析。
The paper presents the application, bottom hole assembly and parameter optimum of steering drilling system in Gangshen well 24-26. Meanwhile, the applied effect is analysed.
同时，还介绍了该算法在钻井工程优化设计中优选钻进参数的应用。
Also, an application of the algorithm is described for optimizing drilling parameters in drilling engineering plan.
准确预测和计算岩石的力学性质和可钻性是有针对性地优选钻头、优化设计参数，从而提高钻井速度的重要依据。
Exact Prediction and calculation of mechanical property and drillability of rock can provide the necessary base for the optimization of bits and designing parameters, thereby quickening penetration.
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