Dispersion of water-soluble polymer for hydraulic fracturing
US12404446B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2022 |
| Grant date | Sep 2, 2025 |
| Priority date | — |
| Expiry date | Sep 13, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An injection fluid for hydraulic fracturing including at least one synthetic water-soluble polymer with a weight average molecular weight greater than or equal to 1 million daltons, the fluid being prepared according to a method including preparing, by radical polymerization an invert emulsion including between 15% and 40% by weight of the polymer, between 20% and 60% by weight of water and at least one hydrocarbon-based solvent, distilling the invert emulsion to obtain a dispersion including between 40% and 60% by weight of particles of the polymer, less than 10% by weight of water and at least one hydrocarbon-based solvent, and diluting the dispersion with 1% to 15% by weight of an aqueous solution including between 20% and 60% by weight of salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.