The flexual deformation of casing in a horizontal hole is caused not only by the uniform transverse load from dead weight, but also by the axial load, and the existence of initial bent if any.

• 水平井套管柱的挠曲变形,不仅受自重引起的横向均布载荷的影响,而且还受轴向力的影响,同时还可能有初弯曲。