Mono-quaternary amine alcohols for use of clay and shale inhibition agents for the drilling industry
US9328279B2 · kind B2 · utility
1Cited by
14References
10Claims
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Key dates
| Filing date | Jul 16, 2013 |
| Grant date | May 3, 2016 |
| Priority date | — |
| Expiry date | Jul 16, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The hydration of clays and shale in drilling operations may be inhibited by employing an aqueous based drilling fluid comprising a shale hydration inhibition agent having the formula wherein R is an alkyl group having 1 to 6 carbons, R1 is an alkyl group having 1 to 18 carbons, and X is an anion. The shale hydration inhibition agent should be present in the aqueous based drilling fluid in sufficient concentration to reduce the reactivity, such as swelling, of clays and shale when exposed to water-based drilling fluids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.