Invert emulsifier for use in invert emulsion drilling fluids
US12258515B2 · kind B2 · utility
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22Claims
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Key dates
| Filing date | Sep 15, 2021 |
| Grant date | Mar 25, 2025 |
| Priority date | — |
| Expiry date | Sep 15, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/035
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An oil soluble invert emulsifier and a process for preparation thereof, including invert emulsion drilling fluid compositions and their use, are described. The oil soluble invert emulsifier is synthesized from fatty acid reaction with polyalkylene polyamines and unsaturated mono carboxylic acids. The emulsifier is further modified with multivalent alkali metal salts. The emulsifier stabilizes the invert emulsion drilling fluid at temperatures exceeding 400° F. and imparts improved fluid properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.