Hydrazide crosslinked polymer emulsions for use in crude oil recovery
US10035946B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2017 |
| Grant date | Jul 31, 2018 |
| Priority date | — |
| Expiry date | Feb 23, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Emulsions of mobility control polymers can be used to increase recovery of crude oil from a subterranean hydrocarbon-containing formation. A flooding fluid comprising the polymer emulsions are injected into a well that is in contact with the subterranean hydrocarbon-containing formation. The polymers can be temporarily cross-linked via hydrolyzable crosslinking moieties derived from a multifunctional hydrazide, a multifunctional amine, a multifunctional hydroxylamine, or a combination thereof and have improved injectivity into the well; the improved injectivity can be measured in terms of the flooding fluid's filter ratio, flow rate, and viscosity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.