Low PH crosslinking of polymers
US10407612B2 · kind B2 · utility
3Cited by
9References
6Claims
0Family size
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Key dates
| Filing date | Apr 6, 2017 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | May 19, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P90/70
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention is directed to polymers that self-crosslink at acidic pH or can be crosslinked by phenolic agents in brine. Such polymers have lower viscosity and can be pumped deep into reservoirs, where they will cross link in situ, thus increasing their viscosity and/or form a gel and blocking thief zones. Methods of making and using such polymers are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.