A Lift-Off-Tolerant Magnetic Flux Leakage Testing Method for Drill Pipes at Wellhead

A Lift-Off-Tolerant Magnetic Flux Leakage Testing Method for Drill Pipes at Wellhead

To meet the great needs for MFL (magnetic flux leakage) inspection of drill pipes at wellheads, a lift-off-tolerant MFL testing method is proposed and investigated in this paper. Firstly, a Helmholtz coil magnetization method and the whole MFL testing scheme are proposed. Then, based on the magnetic...

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Bibliographic Details
Main Authors: Jianbo Wu, Hui Fang, Long Li, Jie Wang, Xiaoming Huang, Yihua Kang, Yanhua Sun, Chaoqing Tang
Format: Article
Language:English
Published: MDPI AG 2017-01-01
Series:Sensors
Subjects:
MFL (magnetic flux leakage)
drill pipe
lift-off distance
magnetic field focusing
Online Access:http://www.mdpi.com/1424-8220/17/1/201

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