在役油管内壁腐蚀缺陷脉冲涡流检测方法  

Pulse eddy current detection method of corrosion defect on inner wall of in-service production tubing

作　　者：王瑾 李勇[1] 苏冰洁 王蕊 贾盼龙 陈振茂[1] WANG Jin;LI Yong;SU Bingjie;WANG Rui;JIA Panlong;CHEN Zhenmao(State Key Laboratory for Strength and Vibration of Mechanical Structures,Shaanxi Engineering Research Centre of NDT and Structural Integrity Evaluation,School of Aerospace Engineering,Xi’an Jiaotong University,Xi’an 710049,China;CNPC Tubular Goods Research Institute,Key Laboratory of Petroleum Tubular Goods and Equipment Quality Safety for State Market Regulation,Xi’an 710077,China)

机构地区：[1]复杂服役环境重大装备结构强度与寿命全国重点实验室,陕西省无损检测与结构完整性评价工程技术研究中心,西安交通大学航天航空学院,陕西西安710049 [2]中国石油集团工程材料研究院有限公司,国家市场监管重点实验室(石油管及装备质量安全),陕西西安710077

出　　处：《传感器与微系统》2024年第12期122-125,130,共5页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(52177007,52311540018,52107009,11927801);国家科技部磁约束核聚变能发展研究专项项目(2019YFE03130003)。

摘　　要：为实现采油管柱中的在役油管内壁腐蚀缺陷高精度离线检测,本文提出了一种基于双磁场传感的脉冲涡流外检测及深度定量评估方法。在试验研究中,以检测信号下降沿对数曲线斜率作为信号特征。在建立信号特征与油管剩余壁厚间映射关系的基础上,通过分析感应涡流在油管内分布范围与成像检测所识别腐蚀缺陷区域间的互相关关系,引入腐蚀缺陷深度评估补偿系数β。结合所建立映射关系,形成油管内壁腐蚀缺陷深度高效可视化定量评估方法。通过对缺陷成像及深度定量评估结果与真实情况的对比分析发现:所提方法不仅可实现对油管内壁腐蚀缺陷的三维形貌重现,且对其深度的定量评估具有较高的精度,满足工程实际在役油管的检测精度要求。In order to realize high-precision offline detection of corrosion desects on inner wall of in-service production tubing in oil well strings,a method based on dual magnetic field sensing for external detection of pulsed eddy current and depth quantitative evaluation is proposed.In the experimental study,the slope of the logarithmic curve of the falling edge of the detection signal is used as the signal feature.Based on the mapping relationship between the signal feature and the remaining wall thickness of the tubing,by analyzing cross-correlation relationship between the distribution range of induced eddy current in the tubing and the corrosion defects area identified by imaging detection,and the corrosion defects depth evaluation compensation coefficient β is introduced.Combined with the established mapping relationship,an efficient visual quantitative evaluation method for the depth of corrosions defects on the inner wall of oil pipes is formed.Through comparative analysis of defects imaging and depth quantitative evaluation results with the real situation,it is found that the proposed method can not only achieve three-dimensional morphology remerge of corrosion defects on the inner wall of the tubing,but also has high precision in quantitative evaluation of the corrosion depth,meeting the precision requirements of the detection of in-service oil tube in engineering practice.

关 键 词：电磁无损检测 脉冲涡流检测 在役油管 内壁腐蚀缺陷 定量评估 

分 类 号：TG115.28[金属学及工艺—物理冶金]