Biodegradable additive concentrate improving the lubricity of aqueous sludges, use thereof and aqueous sludge for drilling
US9719006B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Dec 23, 2013 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Apr 20, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/34
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Biodegradable additive concentrate with pour point according to standard ASTM D 97 below −5° C., improving the lubricity of water-based muds, comprising at least one compound selected from the group consisting of: The use of this concentrate in a water-based mud and the water-based mud containing said concentrate that can be used for drilling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.