稠油热采中隔热油管的漏磁检测方法  

Magnetic flux leakage detection method of insulated tubing during heavy oil thermal recovery

作　　者：杨理践[1] 胡春阳[1] 刘博[2] 高松巍[1] 

机构地区：[1]沈阳工业大学信息科学与工程学院,辽宁沈阳110870 [2]中国石油管道科技研究中心,河北廊坊065000

出　　处：《油气储运》2015年第6期621-626,共6页Oil & Gas Storage and Transportation

基　　金：十二五国家科技部支撑计划资助项目"基于风险的油气管道事故预防关键技术研究";2011BAK06B01-03;国家高技术研究发展计划863资助项目"典型产品运行安全寿命预测技术研究";2012AA040104;科技部国家重大仪表专项"基于频域可变的高端电磁检测仪器开发及应用";2012YQ090175

摘　　要：针对稠油热采过程中隔热油管内、外管缺陷检测和判别存在的问题,提出了一种直流励磁方式下的隔热油管漏磁检测方法。基于直流励磁漏磁检测原理及麦克斯韦方程组,采用有限元仿真软件对隔热油管的检测结构进行仿真,建立了内、外管缺陷检测的试验系统,分析了隔热油管内、外管缺陷Bx、By分量的大小及分布特点。研究结果表明:直流励磁方式下的漏磁检测方法能够实现隔热油管内、外管缺陷的检测,同时能够判别30%深度以下的内、外管缺陷信号。Some problems exist in the defect detection and judgment of the inner and outer pipes of insulated tubing during the heavy oil thermal recovery. This paper proposes a magnetic flux leakage（MFL） detection method of insulated tubing under DC exciting mode. Based on the principle of DC exciting magnetic flux leakage detection and Maxwell＇s equations, the detection structure of insulated tubing is simulated using the finite element simulation software. The experimental system detecting the defects of inner and outer pipes is established. The values and distribution characteristics of Bx and Bycomponents of the defects of inner and outer pipes are analyzed. The research results show that the MFL detection method under DC exciting mode can realize the detection of inner and outer pipes defects and distinguish the defects signals beneath 30% depth.

关 键 词：隔热油管 直流励磁 漏磁检测 有限元仿真 缺陷信号 

分 类 号：TE983[石油与天然气工程—石油机械设备]