Formulations of water-soluble polymers and stabilizing additives for injecting a single compound useable in injection fluids for chemical enhanced oil recovery
US9469805B2 · kind B2 · utility
2Cited by
14References
17Claims
0Family size
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Key dates
| Filing date | Jun 12, 2009 |
| Grant date | Oct 18, 2016 |
| Priority date | — |
| Expiry date | Jun 12, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/56
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Composition based on anionic polymers or water-soluble amphoteric (co)polymers suitable for viscosifying the injection fluids for oil recovery, characterized in that, before dilution with the injection fluid, it further contains at least 3 stabilizing agents selected from the group comprising oxygen reducing agents, precipitating agents, free radical scavengers, complexing agents and sacrificial agents, the said stabilizing agent being suitable for preventing the chemical degradation of the polymer once the polymer is introduced into the injection fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.