中国石油大学学报（自然科学版）2011，Vol.35Issue(4)：77-80,4.DOI:10.3969/j.issn.1673-5005.2011.04.013
关于“套管柱三轴抗拉强度公式”的讨论
Discussing on formula of tri-axial tension strength of casing string
韩志勇1
作者信息
- 1. 中国石油大学石油工程学院,山东青岛266555
- 折叠
摘要
Abstract
The formula of calculation tri-axial tension strength of casing string given by SY/T5322-2000 design method of casing string strength and SY/T 5724-2008 structure and strength design of casing string is incorrect, which has a plus sign "+" instead of minus sign "-" in the radical of it. This conclusion can be obtained by theoretical derivation and comparing with the theory of two-axial stress ellipse. Another mistake is that the method of calculating axial force is incorrect. It is very important that two kinds of axial forces of actual axial force and effective axial force must be correctly distinguished and used in the combinational strength design of casing string. The actual axial force calculated by pressure-area method must be used when tri-axial stress strength theory is used to the combinational strength design of casing string, but the effective axial force is calculated by buoyancy-factor method in the two standards, so that the confusion and mistake are made.关键词
套管柱强度设计/三轴应力强度/压力面积法/浮力系数法/真实轴向力/有效轴向力Key words
casing string strength design/ tri-axial stress strength/ pressure-area method/ buoyancy-factor method/ actual axial force/ effective axial force分类
能源科技引用本文复制引用
韩志勇..关于“套管柱三轴抗拉强度公式”的讨论[J].中国石油大学学报（自然科学版）,2011,35(4):77-80,4.
