文中研究了油管局部缺陷和壁厚减薄缺陷的漏磁场检测原理。
Based on the magnetic leakage flux technique, the principle of localized defect inspection and wall thickness measurement in oil well tubing has been researched.
通过对三个管件的裂纹部位的检测实验，找出裂纹宽度与漏磁场的最大值和变化梯度之间的关系。
Through the examination experiment on three tube pieces' crack part, the relation of crack width, the maximum of leak magnetic field and differential coefficient is found out.
磁记忆法通过对部件表面漏磁场的检测，可以有效检测管座角焊缝中存在的缺陷，减少泄漏现象的发生。
The magnetic memory method, through examining the leakage magnetic field on the surface of the parts, can effectively find out the defects in fillet joints, which can diminish the leakage.
分析了不同类型缺陷的漏磁场分布特征，布置不同方向的检测元件测取不同的缺陷信息；
The characteristics of the magnetic flux leakage of different types of faults were analyzed and the testing elements of various directions were located to get the information of all faults.
上述工作有助于全面认识宽度对漏磁场的作用，实现不同宽度、深度的表面裂纹量化检测。
The work mentioned above is helpful to understand width effects and evaluate surface crack with different width and depth.
为了对CNG储气井安全隐患进行有效检测，根据漏磁检测原理，应用ANSYS对CNG储气井井筒漏磁磁场分布进行模拟。
In order to detect the potential defects of CNG Wells effectively, ANSYS is used to simulate the Magnetic Flux Leakage (MFL) field of CNG Wells according to MFL testing principle.
漏磁检测系统检测实验制定了通过漏磁场判断缺陷信号的特征标准。
The MFL feature standard through which judge defect signals was made in MFL inspection experiment.
漏磁检测系统检测实验制定了通过漏磁场判断缺陷信号的特征标准。
The MFL feature standard through which judge defect signals was made in MFL inspection experiment.
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