Modified carbon black for oilfield fluids
US10450493B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Mar 26, 2015 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | May 23, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/40
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Surface treated modified carbon black particles and oil-based drilling fluids are described. The carbon blacks are incorporated into the oil-based drilling fluids to reduce the electrical resistivity of the oil-based drilling fluids. The surface treated carbon blacks can include a hydrophobic organic group and are readily dispersible in oil-based drilling fluids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.