Nanometer self-locking bentonite film-forming agent, method for preparing the same, and film-forming drilling fluid
US11639460B1 · kind B1 · utility
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4References
11Claims
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Key dates
| Filing date | Jul 15, 2022 |
| Grant date | May 2, 2023 |
| Priority date | — |
| Expiry date | Jul 15, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present application discloses a nanometer self-locking bentonite film-forming agent, a method for preparing the same, and a film-forming drilling fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.