Dual-mechanism thickening agents for hydraulic fracturing fluids
US11286326B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | May 15, 2020 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Jun 4, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/64
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to multi-arm star macromolecules which are used as thickening agents or rheology modifiers, including use in hydraulic fracturing fluid compositions. In one aspect of the invention, a star macromolecule is capable of thickening via a dual mechanism comprising (1) self-assembly of the hydrophobic polymerized segments of the star macromolecules via hydrophobic interactions or associations, and (2) association, reaction, or combination of the hydroxyl-containing polymerized segments of one or more of the star macromolecules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.