point of tangency

基本解释

To determine the point of tangency and the point of interaction of the line segment of the section pass meaningful to the pass analysis and wire cutting program.
确定型钢孔型各线段的切点或交点对孔型分析及线切割程序有重要意义。
The tangency point of Bottom Hole Assembly is located at where the drill string just touches the wall of the borehole, and the contact force is zero here.
在计算底部钻具组合的受力和变形时，以前一般都是按弯矩为零的条件来确定其上切点的位置。
Therefore, the method to determine the position of tangency point should be based on this condition instead of the traditional one which requires the moment is zero here.
提出了一种新观点，即按照钻柱与井壁的接触力为零的条件来确定这一位置。