Oil based compositions and method for temporarily sealing subterranean zones
US6561273B2 · kind B2 · utility
114Cited by
20References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2001 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Jul 10, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/901
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides oil based compositions and methods of using the compositions for temporarily sealing subterranean zones. The compositions are basically comprised of oil, a hydratable polymer, an organophilic clay, a water-swellable clay, and an acid soluble material such as calcium carbonate. These compositions will form a viscous gel when contacted with water. The gelled mass may then be dissolved with an acidic fluid, such as 15% hydrochloric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.