Improvements in Flux Leakage Assessment of Tubulars and Other Goods
Conference: Publication Date: 3 June 2015Testing Method:
Numerous commercial inspection units for oilfield tubular goods (OCTG) exist, but the general idea behind them has not changed much since the Moho Project. This paper traces the development of the sensors used, from the simple inductive coil to hall element arrays, and what information can be extracted from them. The basic problems caused by the use of MFL amplitudes only as an indicator of imperfection size, as opposed to the use of other possible signal parameters is presented. Newer methods of signal processing include 3-D maps of MFL from flaws, and guidance is provided on how to improve the accuracy of current pipe inspection tools.
- Project Mohole – Equipment Demonstrations of Tubular Goods Inspections – Brown & Root, Oct 1965.
- “Basic Principles of Magnetic Flux Leakage Inspection Systems for the Evaluation of Oilfield Tubular Goods,” in Electromagnetic Methods of NDT, ed. W Lord, Gordon & Breach 1985.
- US Patent 4,555,665 “Magnetic Flux Method for Measuring Tubular Wall Thickness”, Stanley et. al 1985.
- US Patent 5914595 “Coiled Tubing Inspection System,” Weinbaum 1999.
- “Nondestructive Evaluation – A Tool for Science and Industry,” Don E. Bray and Roderic K. Stanley, CRC Press.
- Foerster F, Zatsepin and Shcherbinin, & others – Defektoskopia)
- Sablik M, Southwest Research Institute Research.
- “The Imaging of Magnetic Flux leakage Signals for High Quality Assessment of Oilfield Tubular Products,” R. K Stanley, Proc. XIV Conf. on NDT, Sao Paulo, Brazil 1992.
- Jackson Huang, “Defect Characterization by Magnetic Leakage Fields,” Ph D Dissertation, Colorado State University 1975.
- Scott Heath, “Residual and Active Magnetostatic Leakage Field Modeling,” M.S Thesis, Colorado State University, 1984.
- “Use of Inductive Ammeters to Ensure Saturation of Tubular Magnetic Materials Using an Internal Conductor Method,” R. K. Stanley, Mater. Eval, 46(11), 1987.
- US patent 4,710,712, “Method & Apparatus for Measuring Defects in Ferromagnetic Elements,” J Bradfield, et al, 1987.
- “Advanced Electromagnetic Tubular Inspection During Well Servicing,” R. K. Stanley, XIV Conf on NDT, Sao Paulo Brazil 1992.
- “Results from a New Coiled Tubing Assessment System,” Roderic K Stanley, Proc. SPE Conference, The Woodlands, TX April 2011.
- “An Assessment Tool For Coiled Tubing,” Roderic K Stanley, Mater. Eval. 70(6) June 2012, pp 765-774.
- “Experiences with the Assessment of Coiled Tubing,” Roderic K. Stanley, Proc. American Society for Nondestructive Testing Conference, Orlando, Fl, Oct-Nov 2012, pp 127-135.
- “Some New Results in Coiled Oilfield Tubular Inspections,” Roderic K Stanley, Paper Summaries, ASNT Fall Conf, Charleston S. Carolina, Nov 2014.
- “Optimizing Pipe Management with a New Approach to Coiled Tubing Integrity Monitoring,” Torregrossa M, et. al., Paper 168033, SPE/Icota Conf, The Woodlands Tx 2014.
- “A Novel Fatigue Measurement of Coiled Tubing with Defects Based on Magnetic Flux Leakage,” Lui, et al., Paper 173664, SPE/Icota Conf., The Woodlands, Tx 2015.
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