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井眼轨迹设计是定向井能否成功的关键技术之一，文中推导出的两维定向井轨迹设计通用方程，只是针对不同的轨迹类型定义方程的参数，就可以进行多种类型定向井的轨迹设计，简化设计过程。文中分析了三段制、五段制和双增轨迹在设计方面的差异与共同处，对推导出来的通用方程在实际应用中进行设计计算论证。
Wellbore trajectory design is one of the key technologies for the success of directional wells. The general equation of trajectory design for two-dimensional directional well deduced in this paper is that the trajectories of many types of directional wells can be defined by defining the equations for different trajectory types Design, simplify the design process. In this paper, the differences and commonalities of the three-section system, the five-section system and the dual-addition track in the design are analyzed. The general equations deduced are designed and calculated in the practical application.