Slant hole interval

The pathways of drop-off interval in directional wells present upward bending,thus the pipe stem in it is bound to have initial upward bending because of the constraint which subjected to.

在定向井的降斜井段井眼呈现上凸弯曲状态,位于其中的管柱受其约束必然存在上凸初弯曲。