Gellable aqueous compositions containing polymers with special chelating functional groups useful for recovering oil from an oil field
US5256315A · kind A · utility
22Cited by
12References
17Claims
0Family size
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Inventors
Key dates
| Filing date | Nov 18, 1991 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Nov 18, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/935
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Gellable compositions containing: PA1 (a) water; PA1 (b) a water-soluble organic polymer bearing special chelating functional groups; PA1 (c) a multi-valent metal ion capable of causing the polymer to crosslink, are useful to recover oil from a oil field. Said compositions make it possible gels to be obtained which are endowed with improved physical properties and show a higher stability under the conditions prevailing in the oil field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.