Abstract
Aiming at the detection of defects in sucker rod surface, a real-time detection system is designed using the non-destructive testing technology of magnetic flux leakage (MFL). An MFL measurement system contains many components, and this study focuses on the signal acquisition and processing system. First of all, this paper introduces the hardware part of the acquisition system in detail, including the selection and principle of the Hall-effect plural, the design and calculation of the signal conditioning circuit, and the working process of the single chip computer (SCM) control serial port. Based on LabVIEW, a graphical programming software, the software part of the acquisition system is written, including configuration of serial port parameters, identification of detected signals, filtering of original signals, real-time display, storage and playback of data. Finally, an experimental platform for MFL detection is set up, and the MFL measurement is carried out on the transverse and longitudinal defects of the sucker rod surface. The experimental result shows that the designed acquisition and processing system has good detection performance, simple design and high flexibility.
Highlights
In the exploration of onshore oil fields, artificial lift technology is needed to ensure the oil production of mature oil fields [Camponogara, Guardini and Assis (2018)]
The sucker rod pumping has been a common practice in global oil production since it was put forward [Neely and Tolbert (1988)], covering over 85% of the total active well stocks in the USA, and approximately 80% of the oil wells are being produced by the sucker rod pumping in the world [Yu, Shi and Mi (2013)]
The study results demonstrated that data acquisition can be realized accurately using magnetic flux leakage (MFL) inspection technology based on Laboratory Virtual Instrumentation Engineering Workbench (LabVIEW)
Summary
In the exploration of onshore oil fields, artificial lift technology is needed to ensure the oil production of mature oil fields [Camponogara, Guardini and Assis (2018)]. Used inspection techniques include ultrasonic inspection [Turó, Chávez, García-Hernández et al (2013)], eddy current testing [Mao and Lei (2016)] and magnetic flux leakage (MFL) testing [Ege and Coramik (2018); Suresh, Abudhahir and Daniel (2017)] Among these techniques, which all have advantages and disadvantages, the magnetic leakage flux (MFL) method has been widely used in the detection of sucker rod defects in recent years [Zhang, Wei and Yan (2018)]. There is almost no research on real-time acquisition and processing of the MFL detection of sucker rod defects. In this paper, a complete signal acquisition and processing system is designed, the MFL data of sucker rod defects is collected, filtered, stored and replayed in real time using LabVIEW program.
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