摘要
油管的服役条件恶劣 ,实施油管的现场探伤对防止油管泄漏或断裂事故的发生具有十分重要的意义 .本文提出一种新型的油管缺陷磁性检测传感器 ,它利用硬件冗余技术、聚磁检测技术和多探头单元的随动定心技术 ,实现了局部缺陷和壁厚减薄缺陷的综合检测 ;并通过理论分析 ,得到了传感器的输出信号幅值与油管的剩余截面积之间的线性关系 .测试结果表明 ,该传感器具有缺陷分辨率高 ,稳定可靠 ,结构简单 ,现场适应性强等特点 .
In oil wells, tubing suffers from pitting corrosion, relatively large areas of corrosion, rod wear, etc. In some cases, these defects can result in a physical separation of the tubing′s body wall during the production process. For this reason, tubing lifetime prediction based on in situ inspection and monitoring of tubing conditions is of particular importance. A new magentic detector for inspection of above defects is presented. The detector employs hardware redundant technology, magnetic concentrating technology, and some special technologies of multiple probes such as automatic opening and closing, control of drifting, and servocontrol to perform the inspection of above defects simultaneously. Furthermore, the linear relationship between the detector output and the residual cross sectional area of oil well tubing is theoretically established. The test results show that the detector has specific advantages such as high resolution, hig stability, high reliability, simple structure, and high adaptable to in situ conditions.
出处
《传感技术学报》
CAS
CSCD
2002年第3期238-242,共5页
Chinese Journal of Sensors and Actuators
关键词
油管
缺陷
漏磁场
无损检测
磁性传感器
oil well tubing, defect, magnetic flux leakage, nondestructive testing, magnetic detector
