Wellbore fluid
US8242059B2 · kind B2 · utility
44Cited by
2References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 24, 2008 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Mar 10, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Oil-based wellbore fluid in the form of an emulsion having a continuous phase containing an oil and, dispersed therein, a first dispersed liquid phase and a second separate dispersed liquid phase. The first dispersed liquid phase is a brine phase containing at least 5% by weight of a dissolved salt or a mixture of salts, and the second dispersed liquid phase is a polar organic liquid which is insoluble or sparingly soluble in the brine and contains the first dispersed liquid phase, but is soluble in pure water. The second dispersed liquid phase is in the form of droplets having an average diameter of not less than 5 microns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.