Cement top jobs in wellbore annuli using expandable compositions
US12428931B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2023 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | Dec 6, 2043 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/13
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of deploying an expandable composition in a cement top job in a well system includes identifying evidence of actual or potential gas migration within an annulus cement of the well system. Once the evidence of gas migration is identified, a first component and a second component are mixed in a mixer to form the expandable composition and the expandable composition is pumped from the mixer through a conduit to a top of cement of the annulus cement. The expandable composition expands to form an expanded composition that seals the annulus above the top of cement of the annulus cement. Cement can be added onto the expanded composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.