Thermally stable polymers for enhanced oil recovery
US10450500B2 · kind B2 · utility
4Cited by
34References
3Claims
0Family size
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Key dates
| Filing date | Jan 12, 2015 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Sep 12, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F26/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed herein are polymer compositions useful in high temperature enhanced oil recovery applications. The polymer compositions include at least 20 mol % of an N,N-dialkyl-N,N-diallylammonium salt and further have a net negative charge. The polymer compositions provide polymer dispersions in water or brine having stable viscosity when maintained at temperatures of 100° C. and above for at least 2 days.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.