Stabilized water-dispersible latex additives for drilling fluids
US11499081B2 · kind B2 · utility
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10References
17Claims
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Key dates
| Filing date | Jun 28, 2021 |
| Grant date | Nov 15, 2022 |
| Priority date | — |
| Expiry date | Jun 28, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/516
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A stabilized water-dispersible latex additive useful in both freshwater-based and brine-based drilling fluids, may be formed by mixing an effective amount of a compound containing at least one pyrrolidone ring, such as, polyvinylpyrrolidone, a vinylpyrrolidone-vinyl acetate copolymer, poly(1-vinylpyrrolidone-co-2-dimethylaminoethyl methacrylate), a vinylpyrrolidone-acrylic acid copolymer, and combinations thereof, with the water-dispersible latex additive before or after the water-dispersible latex additive is introduced to the drilling fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.