Cross-linked polyvinyl alcohols and oil reservoir permeability control therewith
US4859717A · kind A · utility
17Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1987 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Sep 4, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/935
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A novel cross-linked polymer is obtained by cross-linking polyvinyl alcohol with a cross-linking agent which is a mixture of a phenolic component and an aldehyde or a mixture of a naphtholic component and an aldehyde. The resulting polymer is exceptionally thermally stable and, therefore, can be used as an effective permeability control agent in all enhanced oil recovery operations, including steam flooding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.