Polyamine salts as clay stabilizing agents
US7601675B2 · kind B2 · utility
6Cited by
14References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2007 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Oct 16, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A clayish subterranean formation, such as may be encountered in rock surrounding a well bore during hydrocarbon recovery operations may be stabilized with a polyamine salt of an imide of polymaleic anhydride. The salt may be unneutralized or partially neutralized. The invention is particularly relevant to hydraulic fracturing fluids used in enhanced oil recovery. The compositions of this invention are more environmentally friendly than some current technology.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.