Viscoelastic surfactant fluids and related methods of use
US7238648B2 · kind B2 · utility
30Cited by
47References
31Claims
0Family size
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Key dates
| Filing date | Oct 14, 2003 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Jul 8, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/924
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Viscoelastic surfactant based aqueous fluid systems useful as thickening agents in various applications, e.g. to suspend particles produced during the excavation of geologic formations. The surfactants are zwitterionic/amphoteric surfactants such as dihydroxyl alkyl glycinate, alkyl ampho acetate or propionate, alkyl betaine, alkyl amidopropyl betaine and alkylimino mono- or di-propionates derived from certain waxes, fats and oils. The thickening agent is used in conjunction with an inorganic water-soluble salt or organic additive such as phthalic acid, salicylic acid or their salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.