Synthetic crosslinked polymer additive for use in subterranean treatment fluids
US10273397B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2014 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Oct 1, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/887
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Crosslinked polymer additives that may be used as thinners and/or deflocculants in subterranean treatment fluids are provided. In one embodiment, the methods comprise: providing a treatment fluid comprising an aqueous base fluid, a viscosifying agent, and a crosslinked synthetic polymer that comprises a copolymer of at least a first monomer comprising 2-acrylamido-2-methylpropane sulfonic acid or any salt thereof, and a second monomer comprising an N-vinyl amide, and at least one crosslinking agent, wherein the average molecular weight of the crosslinked synthetic polymer is less than about 3,000,000 grams per mole; and introducing the treatment fluid into at least a portion of a well bore penetrating at least a portion of a subterranean formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.