Page 54 - 无损检测2024年第十一期

2024 远东无损检测新技术论坛论文精选
2024 远东无损检测新技术论坛论文精选

DOI：10.11973/wsjc240386

基于磁场梯度感测的旧油管腐蚀缺陷

脉冲涡流可视化检测

王 瑾 ，李 勇 ，王 蕊 ，刘正帅 ，陈振茂 1
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[1. 复杂服役环境重大装备结构强度与寿命全国重点试验室，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，西安 710049；
2. 中国石油集团工程材料研究院有限公司，国家市场监管重点试验室（石油管及装备质量安全），西安，710077]
摘 要：油管是油气井管柱中用于直接汲取石油、天然气的最内部管道。服役中的油管长期接
触含硫物质，其内壁会出现腐蚀缺陷，影响管柱完整性。基于磁场梯度感测，提出一种结合双传感
器差分机制的脉冲涡流检测探头，以实现旧油管内壁腐蚀缺陷的高灵敏度成像。在确定检测探头
构型的基础上，通过系列试验，探究下降沿对数曲线斜率和归一化差分信号峰值两类信号特征与腐
蚀缺陷尺寸间的关联规律；同时，基于两类信号特征探索腐蚀缺陷成像方法。提出了信号特征融合
方法，形成基于融合信号特征的旧油管腐蚀缺陷可视化手段。试验结果表明，相比传统脉冲涡流检
测，所提方法得到的基于融合特征的腐蚀缺陷成像结果具有更高的图像信噪比；采用所提检测探头
及信号特征融合方法，可对旧油管内壁缺陷实现高灵敏度、高信噪比的可视化检测。
关键词：电磁无损检测；脉冲涡流检测；旧油管腐蚀缺陷；信号特征融合；可视化检测

中图分类号：TG115.28 文献标志码：A 文章编号：1000-6656(2024)11-0020-08

Pulsed eddy current screening of corrosions in the in-service tubing based on
gradient magnetic field sensing

WANG Jin , LI Yong , WANG Rui , LIU Zhengshuai , CHEN Zhenmao 1
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（1. 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, Shaanxi, Xi’an 710049, China;
2. CNPC Tubular Goods Research Institute, Key Laboratory of Petroleum Tubular Goods and Equipment Quality Safety for State
Market Regulation, Shaanxi, Xi’an 710077, China）
Abstract: As the inner most pipe of the oil-and-gas well shaft, the tubing is used to directly extract either oil or gas.
The in-service tubing is subject to the sulfurous substances which lead to the corrosion occurring on its internal surface.
This undermines the integrity of the well shaft. In this paper a pulsed eddy current probe was proposed for high-sensitivity
imaging of internal-surface corrosion of the in-service tubing, based on gradient magnetic field sensing alongside the
differential mechanism of dual magnetic sensors. Following the determination of the probe structure, two signal features,
i.e., the gradient of the logarithm curve of the testing signal and peak value of normalized differential signal were intensively

收稿日期：2024-08-16
investigated through experiments. The correlation
基金项目：国家磁约束核聚变能发展研究专项项目（2019YFE
of each signal feature with the corrosion sizing
03130003） ；国家自然科学基金资助项目（52177007，52311540018，
parameters was established. And the corrosion
11927801）
作者简介：王 瑾（1998—），女，硕士研究生，研究方向为电磁无 imaging method was explored based on each
signal feature. A signal-feature fusion approach
损检测，wangjin123@stu.xjtu.edu.cn
通信作者：李 勇（1978—），男，教授，博士研究生导师，研究方向 was proposed. Based on the fusion of the two
为机械结构无损定量检测及完整性评估，yong.li@mail.xjtu.edu.cn signal features, the visualization method for tubing
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2024 年 第 46 卷 第 11 期
无损检测