1)build section,增斜井段2)drop-off interval,降斜井段3)Slant hole interval,斜井段4)kick-off,build up section,造斜井段5)borehole of varying direction,变斜度井段6)low wall of the hole,斜井下段井壁
用法例句
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.
