Method relating to well abandonment
US12163398B2 · kind B2 · utility
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10References
16Claims
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Assignee
Inventor
Key dates
| Filing date | Mar 26, 2020 |
| Grant date | Dec 10, 2024 |
| Priority date | — |
| Expiry date | Oct 23, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/116
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for well abandonment in a cased well bore by perforating, washing and cementing to provide a plug over a longitudinal section of the well, wherein logging of the washed outer annulus is performed to evaluate the effectiveness of the wash and determine the most appropriate plugging technique. One of perf, wash and cement; cut and pull; and section milling are described dependent upon the material left in the outer annulus following the washing step. Verification of the washing step in a perf wash and cement well abandonment procedure is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.