Cellulose nanofibers in extended cement systems
US11319476B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Aug 5, 2020 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Aug 8, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Methods herein may include injecting a cement slurry having an aqueous base fluid, a cement, and a plurality of cellulose nanofibers dispersed in the aqueous base fluid. The plurality of cellulose nanofibers may be present in the slurry in an amount effective to provide a slurry density of not higher than 15 lb/gal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.