非均匀外挤力作用下套管强度特征分析  

Analysis of Casing Strengths under Heterogeneous External Pressure

作　　者：王桂华[1] 盖永革[1] 程远方[1] 

机构地区：[1]石油大学油气井工程学科,山东东营257061

出　　处：《石油钻探技术》2003年第5期58-60,共3页Petroleum Drilling Techniques

摘　　要：通过ANSYS有限元软件分析了套管在非均匀外挤力作用下的大变形特征,定义了套管在非均匀外挤力作用下破坏的临界条件,得到了此时的临界非均匀外挤力。为了表征套管在非均匀外挤力作用下的强度特征,定义了套管的等效破坏载荷,分析了等效破坏载荷与壁厚、载荷不均匀度的关系,并给出了计算实例。Based on the analysis of distortion features of casing under heterogeneous external pressure by the software of ANSYS, the critical heterogeneous external pressure is determined after defining the critical failure conditions under this condition. The equivalent failure loads are defined for describing the casing strengths under this condition. Meanwhile, this paper analyzes the relation between the equivalent failure loads and thickness, heterogeneous degree of loads, and presents computation examples.

关 键 词：套管强度 数值模拟 有限元 非均匀外挤力 套管柱 设计 油田 

分 类 号：TE931.2[石油与天然气工程—石油机械设备]