Oil based drilling fluids with enhanced stability at high temperatures
US8586507B2 · kind B2 · utility
5Cited by
2References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2011 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Sep 28, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/36
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Ester based drilling fluids with enhanced stability at high temperatures for drilling, running casing in, and/or cementing a borehole in a subterranean formation. The drilling fluids comprise a monomeric or polymeric carbodiimide hydrolysis inhibitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.