NDLI: A Method for Improving SNR of Drill Pipe Leakage Flux Testing Signals by Means of Magnetic Concentrating Effect

Content Provider	IEEE Xplore Digital Library
Author	Yilai Ma Renyang He Jinzhong Chen
Copyright Year	1965
Abstract	Magnetic flux leakage (MFL) technique is generally considered as an efficient and effective nondestructive testing method, which has been widely used in the drill pipe detection in oil field. This paper aims at studying the magnetic concentrating effect, and proposing a method of gathering the MFL by means of magnetic concentrating device. Electromagnetic finite-element analysis shows that pipe MFL signals centralize near defects obviously and the leakage signals detected by Hall elements enhance greatly as magnetic concentrating structure can collect useful magnetic component. A drill pipe MFL experiment confirms the analysis results that the probe with magnetic concentrating device could obviously improve SNR of MFL signals, increase measuring the width of defects and reduce the requirements of liftoff value. Therefore, it is of great help to improve pipe leakage flux testing sensitivity.
Sponsorship	IEEE Magnetics Society
Starting Page	1
Ending Page	7
Page Count	7
File Size	2424103
File Format	PDF
ISSN	00189464
Volume Number	51
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic flux leakage Magnetic devices Finite element analysis Magnetic fields Magnetic hysteresis Magnetic field measurement Magnetic circuits SNR Drill pipe Magnetic concentrating Finite element method finite-element method (FEM) magnetic concentrating magnetic flux leakage (MFL)
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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