Packer fluid with nanosilica dispersion and sodium bicarbonate for thermal insulation
US11753574B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Jul 30, 2021 |
| Grant date | Sep 12, 2023 |
| Priority date | — |
| Expiry date | Oct 18, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A downhole system includes a packer sealing an annular space around a downhole tubing and an insulating packer fluid positioned within the annular space and adjacent to the packer. The insulating packer fluid includes a sodium bicarbonate activator and an acidic nanosilica dispersion having silica nanoparticles and a stabilizer, wherein the pH of the acidic nanosilica dispersion ranges from 2 to 5, and the silica nanoparticles form at least 20 percent by weight of the acidic nanosilica dispersion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.