Glycol ether amines for use as clay and shale inhibition agents for the drilling industry
US9574126B2 · kind B2 · utility
5Cited by
12References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2013 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Dec 18, 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: (Formula I should be inserted here.) wherein R is hydrogen or an alkyl group having 1 to 12 carbons, R1 is an alkylene group having 1 to 12 carbons, and R2 is an alkyl group having 1 to 12 carbons. 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.