Lost circulation additive for drilling fluids
US7799743B2 · kind B2 · utility
7Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2005 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Apr 7, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/80
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Additive for a drilling fluid to block drilling-induced or pre-existing rock fractures comprising polymeric granules with a diameter distribution peak between 1000 and 200 microns and an average resiliency of at least 10% rebound after compression by a load of 200 N and uses thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.