二雏绕障定向井具有容易施工和钻井成本低等特点。文中提出了确定绕障位置的约束方程及其求解方法，建立了设计平面内障碍物的边界方程，并结合典型的障碍物模型，给出了方程的建立过程和具体表达形式。所提出的设计原理和分析方法，适用于各种定向井剖面和空间障碍物模型，并给出了设计实例。 Second-round detoured directional wells with easy construction and drilling low cost characteristics. In this paper, the constraint equations to determine the location of the obstacle and its solution method are proposed. The boundary equations of the obstacle in the plane of the design are established. Combined with the typical obstacle model, the establishment process of the equation and the concrete expression form are given. The proposed design principles and analysis methods are applicable to various directional well sections and space obstacle models, and examples of design are given.