Fracturing fluid breaker system which is activated by fracture closure
US4506734A · kind A · utility
228Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1983 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Sep 7, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/921
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed are compositions and related methods of use for reducing the viscosity of a fluid introduced into a subterranean formation. The compositions are introduced into the subterranean formation and are non-reactive to the fluid until activated by the closing of any fractures in the subterranean formation upon the compositions. The compositions are comprised of a viscosity reducing chemical, such as an enzyme, oxidizing agent, acid, catalyst, or mixtures thereof, encapsulated in dry or liquid form within hollow or porous, crushable beads. The beads can be formed from glass, ceramics, plastics, gels, or mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.