Process of thermal stabilization of aqueous solutions of polysaccharides and its application to drilling fluids
US4599180A · kind A · utility
12Cited by
9References
9Claims
0Family size
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Key dates
| Filing date | Sep 28, 1984 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | Sep 28, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/206
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Stabilization of aqueous solutions of polysaccharides, even in the hot, by the addition of alkali metal dialkyl-dithiocarbamate and sodium chloride or calcium chloride. Applications to drilling fluids and to the improved recovery of crude oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.