Defect penetration estimate using magnetic flux image enhancement
US10393702B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 2016 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Jun 6, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N17/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved process for evaluating a defect in wellbore casing using a magnetic flux leakage tool is disclosed. According to the disclosed technique, signals recorded using a magnetic flux leakage tool are arranged into a matrix that defines a magnetic flux leakage image, and a defect in the evaluated wellbore casing is identified in the image. A portion of the image in which the defect appears is enhanced using an iterative image enhancement process to determine a geometry of the defect. A characteristic value of the defect is then used in conjunction with a characteristic value-degree of penetration relationship that is specific to the determined geometry in order to determine the degree of penetration of the defect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.