大斜度井中套管磨损机理研究

发布时间：2018-02-12 04:57

本文关键词： 实验研究套管磨损有限元剩余强度抗外挤强度　出处：《西南石油大学学报(自然科学版)》2016年02期 　论文类型：期刊论文

【摘要】：针对套管在大斜度井中的磨损失效,首先开展了套管的磨损实验研究,根据Dawson和White提出的基于能量损失的线性磨损模型以及本文的实验数据,获得了钻杆接头与套管的磨损系数。建立了钻杆接头与套管磨损机理研究的有限元模型,通过任意拉格朗日-欧拉自适应网格划分,在数值模拟过程中可以对套管磨损的节点进行"实时调整",并对网格单元做光滑处理,不断更新钻柱接头与套管的接触关系,对钻进过程中套管磨损机理进行了研究。在磨损后套管结构形状研究的基础上,开展了套管剩余抗挤强度的数值模拟研究,得到了套管的最大磨损深度随时间的变化关系,建立了套管剩余抗挤强度与最大磨损深度的关系,进而可以预测套管在某一累积磨损时间内套管的最大磨损深度和套管的剩余强度,为磨损套管的安全性评价提供了理论依据。
[Abstract]:In the wear of high angle wells casing, first carried out experiment research of casing wear, wear according to the linear model and the experimental data of energy loss based on Dawson and White is put forward, the wear coefficient of drill pipe and casing was established. The drill rod head and finite element study on the mechanism of casing wear model, through the arbitrary Lagrange Euler adaptive mesh in the numerical simulation process can be real-time adjustment of node casing wear, and smooth processing of grid cell, constantly updated drill string joint and pipe contact relationship, the wear mechanism of casing drilling process is studied. Based on the study of casing structure shape after wear on the numerical simulation of the collapsing strength of casing residual, obtains the relation between the maximum wear depth of casing with time, set up the remaining casing The relationship between the collapsing strength and maximum wear depth, which can be predicted in a cumulative time of casing wear depth and residual strength of casing casing wear, and provides a theoretical basis for the safety evaluation of casing wear.

【作者单位】： "油气藏地质及开发工程"国家重点实验室·西南石油大学;中国石油冀东油田公司钻采工艺研究院;
【基金】：国家“十二五”科技重大专项(2011ZX05050) 教育部博士点基金(20135121110005)
【分类号】：TE931.2

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