High viscosity low friction pressure loss well treating fluids and methods
US5762140A · kind A · utility
9Cited by
16References
20Claims
0Family size
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Key dates
| Filing date | Nov 4, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Nov 4, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/685
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
High viscosity well treating fluids having low friction pressure loss when pumped through tubular goods and methods of treating wells using such treating fluids are provided. The treating fluids basically comprise an aqueous fluid, a graft copolymer of hydroxyalkylcellulose and vinyl phosphonic acid, a salt containing a divalent cation and a basic compound for crosslinking the graft copolymer and causing the resulting crosslinked aqueous gel to undergo syneresis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.