用能量法研究套管柱在定向井中的变形及挠曲方程

• 作 者: 姜伟
• 机 构: 渤海公司钻井部 天津塘沽 300452
• 出 处: 中国海上油气(工程)
• 发表日期: 1994年04期
• 关键词: 套管柱 定向井 能量法 挠曲变形 扶正器 三角级数方程 安放位置 中和点 轴向力 井斜角

本文针对目前国内有关文献提出的定向井中套管柱挠曲变形方程及其变形量的计算方法,指出了其概念上的差别及计算上存在的较大误差,并采用能量法求解定向井中套管柱的变形量并推导出挠曲变形方程。这对于准确描述套管柱的挠曲变形,精确计算套管挠曲变形量以及合理确定扶正器安放位置等,都提供了科学的依据。

In this paper, according to the current domestic literature, the method of calculating the deflection and deformation of casing string in directional well is pointed out, and its conceptual differences and large errors in calculation are pointed out. The energy method is used to solve the problem of directional well deformation The deformation of casing string and the deflection deformation equation are deduced. This provides a scientific basis for accurately describing the flexural deformation of the casing string, accurately calculating the amount of deflection of the casing, and determining the proper placement of the centralizer.