Addition of zwitterionic surfactant to water soluble polymer to increase the stability of the polymers in aqueous solutions containing salt and/or surfactants
US9428684B2 · kind B2 · utility
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Key dates
| Filing date | Oct 17, 2008 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Oct 2, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous fluid composition useful for the recovery of hydrocarbons from a subterranean formation, including a mixture of water, a water soluble polymer, an inorganic salt and at least one zwitterionic surfactant and methods of using same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.