Ф73mm钻杆漏磁检测缺陷的有限元仿真分析  

Finite Element Simulation Analysis of Magnetic Leakage Detection of 73mm Drill Pipe

作　　者：戴光[1] 任毅[1] 杨志军[1] 鲁鑫[1] 白明超 

机构地区：[1]东北石油大学机械科学与工程学院

出　　处：《化工机械》2014年第4期488-491,527,共5页Chemical Engineering & Machinery

摘　　要：针对油田生产所用钻杆杆体检测难度较大的问题,将漏磁检测方法应用于钻杆的检测。选取Ф73mm钻杆为研究对象,应用ANSYS有限元软件和漏磁检测原理,对其进行了三维漏磁场有限元分析研究。通过对计算结果的参量分析,得到了关于缺陷尺寸(直径、深度)、磁化气隙高度及内、外壁缺陷等参数对钻杆缺陷漏磁场信号的影响规律。分析结果表明,缺陷处的漏磁场信号随缺陷直径的增大先增强后减弱,随缺陷深度增大呈线性增长趋势;磁化强度随气隙增大而减弱,内、外壁缺陷信号差异并不十分明显。In view of the difficulty in detecting drill pipe body in oil field,magnetic flux leakage（ MFL） testing method was applied. Taking drill pipe（Ф 73 mm） as the research object,both MFL principle and ANSYS were used to implement finite element analysis of drill pipe＇s 3D leakage magnetic filed. Based on parametric analysis of the calculation results,the effect rule of geometric size（ depth and diameter）,magnetic air-gap height and the defects of inside and outside wall on the signal of drill pipe defect＇s leakage magnetic field was investigated to show that,the leakage magnetic field signal of the defect becomes increased with the rise of defect diameter and then it becomes decreased,and it increases linearly with the enlarging of defect depth; the magnetization intensity becomes weak with the increase of air gap,and the signal difference between the inside and outside wall becomes less obvious.

关 键 词：钻杆 漏磁 有限元 参量分析 

分 类 号：TQ055[化学工程]