Oil-based drilling fluid comprising a temperature-stable and non-polluting emulsifying system
US7247604B2 · kind B2 · utility
20Cited by
17References
10Claims
0Family size
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Key dates
| Filing date | Jun 5, 2001 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | Sep 21, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/925
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A temperature-stable, non eco-toxic oil-base well fluid that is particularly suitable for high pressure/high temperature drilling comprises an emulsification system comprising at least one superamide that may or may not be polyalkoxylated, optionally associated with a non-ionic co-surfactant. The oil-base well fluid comprising such a system can be used at temperatures of up to about 200° C. due to the production of highly temperature-stable reverse emulsions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.