抽油杆外穿过式涡流探头的设计制作

Development of the exteriorly-thru-type eddy current probe in testing sucker rod

抽油杆在采油过程中发生断裂会造成很大的经济损失。发生断裂的主要原因是抽油杆表面的裂纹源在周期性载荷作用下由表及里地扩展。文章介绍一种自主设计的外穿过式涡流探头,此类探头可以准确、迅速地检测出抽油杆的裂纹源,与目前常用的漏磁检测探头和点式涡流探头相比,该探头简单、易制作,适合抽油杆的在线检测。

The sucker rod is the main loading component of the oil extraction system in oil fields.If it breaks in the process of production,great losses will be incurred in the suspended operation.The main reason for the break is the crack source in the surface of the sucker rod will spread from surface to interior under the periodic load.This paper introduces a kind of self-designed exteriorly-thru-type eddy current probe.The probe can conveniently detect the crack source of the sucker rod,and it is simple in manufacturing process.Compared with point-type eddy current probe and magnetic flux leakage probe,it is suitable for the on-line detection.