Methods for controlling the rheological properties of viscoelastic surfactants based fluids
US7084095B2 · kind B2 · utility
154Cited by
13References
72Claims
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Key dates
| Filing date | Dec 19, 2002 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Dec 29, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/921
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
It was found that the addition of polymers to viscoelastic surfactant base system allows to adjust the rheological properties of the base fluid. Depending in particular on one side of the ratio of the concentration of added polymer and the concentration of viscoelastic surfactant and on the other side of the molecular weight of the added polymer, the same polymer—or the same type of polymer—may perform different functions such as viscosity enhancer, viscosity breaker or viscosity-recovery enhancer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.