非均匀磨损套管空间有限元分析
凌浩然，冯进
（长江大学 机械工程学院，湖北荆州 434023）
摘要：针对非均匀磨损套管进行了空间有限元分析，研究了磨损量、磨损长度、轴向拉力对套管抗内压强度的影响。计算结果表明非均匀磨损套管的抗内压强度随磨损厚度的增加而降低；不同的磨损长度对套管抗内压强度影响不明显，即抗内压强度主要受磨损厚度的影响；套管轴向拉力对其抗内压强度影响不大，并且这种影响随着磨损量的增加而逐渐减小。通过对磨损套管抗内压强度变化规律的研究，为合理制定井控措施提供了科学依据。
关键词：钻井；套管；非均匀磨损；磨损厚度；抗内压强度
中图分类号：O242.21 文献标识码：A 文章编号：1006－0316 (2012) 04－0017－04
Space finite element analysis of uniform worn casings
LING Hao-ran，FENG Jin
（University of Yangtze school of Mechanic Engineering，Jingzhou 434023，China）
Abstract：This paper analyzes uniform worn casings by space finite element, discussing influencing factors of casing burst strength(the ability to hold internal pressure), including wear exent,wear length and axial tension. Calculated result shows that casing burst strength of uniform worn casings decreases with wear thickness increasing; Various wear length exerts no obvious influence on casing burst strength, meaning that it is wear thickness that influences casing burst strength mainly; Axial tension has little influence on casing burst strength, and this influence decreases with wear exent increasing.It provides a scientific basis for deciding well controlling measures reasonably to study on the variation regulation of casing burst strength of worn casings.
Key words：well drilling；casing pipe；uniform worn；wear thickness———————————————
收稿日期：2011－08－22
基金项目：“大学生创新性实验计划”项目资助（101048918）
作者简介：凌浩然（1989－），男，湖北黄冈人，本科在读，主要研究方向为机械设计。
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