Synthesized Magnetic Field Focusing for the Non-Destructive Testing of Oil and Gas Well Casing Pipes Using Pulsed Eddy-Current Array

Changzan Liu; Bo Dang; Haiyan WangLing YangJingxin DangXiaohong ShenRuirong Dang

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Synthesized Magnetic Field Focusing for the Non-Destructive Testing of Oil and Gas Well Casing Pipes Using Pulsed Eddy-Current Array

机译：Synthesized Magnetic Field Focusing for the Non-Destructive Testing of Oil and Gas Well Casing Pipes Using Pulsed Eddy-Current Array

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摘要

In this article, we address the problem of synthesized magnetic field focusing (SMF) of the pulsed eddy-current (PEC) technology for the non-destructive testing (NDT) of oil and gas well casing pipes. The electromagnetic response excited by multiple transmitters was derived using the signal model of downhole PEC system. The magnetic field was shown to be adjustable by modifying the currents of the multiple transmitting array. Based on this property, magnetic fields were synthesized with the mean squared error (MMSE) criterion to be focused on the center of the transmitting array, and a weighted MMSE (WMMSE)-based SMF was also proposed to achieve an optimal synthetic magnetic field. Furthermore, the primal-dual interior-point method was used to solve the WMMSE optimization problem with the total and single transmit power constraints for the practical application. Simulations and experimental results showed that the SMF with the PEC array effectively focuses the eddy-current field on the center of the transmitting array.

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来源
《IEEE Transactions on Magnetics》 |2022年第2期|6201710-1-6201710-10|共10页
作者
Changzan Liu; Bo Dang; Haiyan WangLing YangJingxin DangXiaohong ShenRuirong Dang;
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作者单位

Northwestern Polytechnical University;

Xi’

an Shiyou University;

Shaanxi University of Science and TechnologyUniversity of Electronic Science and Technology of China;

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原文格式 PDF
正文语种英语
中图分类电工技术;
关键词
Downhole; minimum mean squared error (MMSE); non-destructive testing (NDT); pulsed eddy-current (PEC); synthesized magnetic field focusing (SMF); Magnetic fields; Transmitters; Focusing; Testing; Oils; Metals; Spatial resolution;

Synthesized Magnetic Field Focusing for the Non-Destructive Testing of Oil and Gas Well Casing Pipes Using Pulsed Eddy-Current Array

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