The forces on the rod string in slant stralght holes is different for that in stheight holes, therefore the calculationof the antishock sboke is different.

• 斜直井中抽油杆柱受力状况不同于直井，故其防冲距的计算也不同于直井。斜宜并检泵作业碰泵时，抽油杆柱由于重力作用在油管内呈螺旋状弯曲。