Styrenic block copolymers as thermally-activated viscosifiers for oilfield applications
US10053609B2 · kind B2 · utility
4Cited by
17References
27Claims
0Family size
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Key dates
| Filing date | Jun 7, 2016 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | Jun 27, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/54
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided herein is a dispersion composition comprising a blend of a semi-crystalline, selectively hydrogenated block copolymer and a low polarity fluid for oilfield applications. The block copolymer comprises blocks of semi-crystalline hydrogenated polybutadiene, blocks of poly(mono alkenyl arenes), and blocks of hydrogenated, non-crystalline conjugated dienes. The dispersions can be converted to thixotropic fluids or cohesive gels and find application as insulating packer fluids, fluid loss pills, drilling fluids and completion fluids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.