水平井套管挠曲变形计算

Calculation of flexural deformation of casing string in horizontal holes

应用能量守恒定律将具有初弯曲的水平井套管柱转化为直管柱，从而简化了套管柱挠曲变形的计算。讨论了相邻两扶正器问套管的力学模型，指出在铰支处应加上弯矩的作用。由此模型可得到水平井套管最大挠度的计算公式。

The casing string with initial curvature in a horizontal hole is transformed into straight string according to the law of energy conservation, thus the calculation of the flexural deformation of the stting is simplified. The mechanical model of the casing between two adjacent stabilizers is discussed, and it is indicated that the action of bending torque at the hinge points should be considered. And the equation for calculating the maximum deflection of the casing string in a horizontal hole can be obtained according to the above-mentioned model.