针对定向井、侧钻井井眼轨道的常见类型给出了不同的优化数学模型，分析了计算过程，并给出了应用实例。
According to the normal well path types of the directional and sidetrack Wells, the calculating process is analyzed and the application cases are given.
地层可钻性各向异性评价在直井防斜以及定向井井眼轨迹控制中具有重要的意义。
Evaluation of formation drill-ability anisotropy has important effect for preventing deviation of straight holes and planning drilling trajectories of directional Wells.
复合式滑动导向钻井方式在定向井、水平井井眼轨迹控制中有其独特的优点。
The compounding slide steering drilling mode has its specific advantages in trajectory control of directional well and horizontal well.
所建立的圆弧模型及求解方法可应用于定向井井眼轨迹控制和中靶质量评价等。
The established arc model and its solving method can be applied to directional well trajectory control and target hitting quality evaluation, etc.
因为弓型弹簧比井眼稍大一些，因此在直井或倾角较小的定向井中能够完全居中。
Since the bow springs are slightly larger than the wellbore, they can provide complete centralization in vertical or slightly deviated Wells.
地层自然造斜规律和造斜能力是定向井井眼轨迹控制和直井防斜打直的基本地质依据。
The formation natural deflecting law and force are the basic geological foundation for the well trajectory control in directional wells and deflecting-protection in vertical wells.
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.
介绍了历年来江苏探区三段制定向井井眼轨迹控制情况。
This paper reviewed the hole trajectory control of three interval profiles directional Wells that drilled in past years in Jiangsu exploration area.
基于坐标变换方法建立了适用于任意井眼轨迹的定向井套管应力三维有限元计算模型。
A 3d finite element model for calculating the casing stress in the directional Wells was developed based on the theory of coordinate conversion.
基于坐标变换方法建立了适用于任意井眼轨迹的定向井套管应力三维有限元计算模型。
A 3d finite element model for calculating the casing stress in the directional Wells was developed based on the theory of coordinate conversion.
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