利用该模式并结合钻柱力学三维分析，可以预测定向井井眼轨迹，还可以利用定向井井史资料，反求有关系数。
Combined with the BHA analysis, the models are used to realize the prediction of drilling trajectory and to back-calculate the related coefficients from the well history information.
本实用新型结构简单，易于加工，装卸极为方便、快捷，而且只能定向装配，不会反装刀盘。
The utility model has simple structure, easy processing and convenient and rapid assembly and disassembly, only can be directionally assembled, and cannot install the cutter head reversely.
本实用新型结构简单，易于加工，装卸极为方便、快捷，而且只能定向装配，不会反装刀盘。
The utility model has simple structure, easy processing and convenient and rapid assembly and disassembly, only can be directionally assembled, and cannot install the cutter head reversely.
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