System and method for downhole gamma ray inspection behind multistring completions
US12332401B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2022 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Jun 7, 2043 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for identifying a defect within a cement layer of a multi string wellbore includes deploying a gamma scanner into the multistring wellbore, the gamma scanner including at least one source and at least one detector, the at least one source emitting radiation into the multistring wellbore and the at least one detector receiving backscatter radiation. The method also includes obtaining, from the gamma scanner, a count rate associated with at least one region of interest of the multistring wellbore. The method further includes identifying, based at least in part on data acquired from the gamma scanner, a background profile for the multistring wellbore. The method includes removing the background profile from the count rate. The method further includes identifying, within the at least one region of interest, a defect within the cement layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.