基于微磁的连续管电磁检测技术研究  

Micro-magnetic Based Electromagnetic Inspection Technology for Coiled Tubing

作　　者：程强强[1,2] 夏桂锁[1] 于润桥[1] 程东方[1] 周兆明[3] 万夫[3] 

机构地区：[1]南昌航空大学 [2]南昌大学 [3]中石油川庆钻探工程有限公司安检院

出　　处：《石油机械》2014年第5期1-5,共5页China Petroleum Machinery

基　　金：国家科技重大专项"大型油气田及煤层气开发"(2011ZX05036-004);中石油川庆钻探工程有限公司安检院科研项目"连续油管现场在役电磁检测系统研制"(20120030626)

摘　　要：微磁检测技术是一种无需外界磁化、无需退磁,利用缺陷自身产生的漏磁场进行无损检测的新技术。根据连续管在线检测要求,基于微磁检测技术和电涡流检测技术,研制了连续管电磁检测仪器样机,对连续管使用过程中常见的腐蚀、裂纹缺陷和椭圆度缺陷共同进行了检测。分析了连续管微磁检测的原理,建立了微磁检测等效磁导率模型,设计了椭圆度检测的算法,利用第6个传感器对测量结果进行了优化及校验。样机的现场试验结果表明,检测仪器的缺陷分辨率为0.1 mm,检测速度可达1 m/s,椭圆度检测精度高达1%,检测效率高、速度快,性能稳定可靠。Micro-magnetic inspection technology is a new technology using the leakage magnetic field produced by the defect itself to conduct nondestructive testing, without needing external magnetization and demagnetiza- tion. According to the coiled tubing （CT） online inspection requirement and on the basis of micro-magnetic inspec- tion technology and electric eddy current inspection technology, the CT electromagnetic inspection instrument proto- type was developed. The inspection of common corrosion, crack defect and ellipticity defect in the process of using CT was carried out. The principle of CT micro-magnetic inspection was analyzed. The model of micro-magnetic in- spection equivalent permeability was established. The algorithm of ellipticity inspection was designed. The sixth sen- sor was used to optimize and verify the measurement result. The field test of the prototype shows that the defect reso- lution of the inspection instrument is 0. 1 mm; the inspection velocity can reach 1 m/s; the ellipticity inspection precision is as high as 1%. The inspection efficiency is high, the inspection speed is fast and the inspection per- formance is stable and reliable.

关 键 词：连续管 微磁检测 涡流检测 椭圆度 腐蚀缺陷 裂纹 磁导率 

分 类 号：TE921[石油与天然气工程—石油机械设备]