Synthetic crosslinked copolymer solutions and direct injection to subterranean oil and gas formations
US6465397B1 · kind B1 · utility
34Cited by
39References
38Claims
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Key dates
| Filing date | Feb 11, 2000 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Feb 11, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/5756
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
What is disclosed is the preparation and use of synthetic water soluble copolymers useful in modifying the water permeability characteristics of subterranean hydrocarbon producing formations. The copolymers are in the form of dilute, pumpable, homogeneous, aqueous solutions and comprise a crosslinked synthetic copolymerizate with intramolecular and intermolecular crosslinking in a non-gelled state and a molecular size/shape corresponding to a K-value of 220-450.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.