Cross-linked polyvinyl alcohols and oil reservoir permeability control therewith
US4896723A · kind A · utility
18Cited by
11References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1989 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Jun 21, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/935
- WIPO fieldBasic materials chemistry
- 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.