Method of degrading cellulose-containing fluids during completions, workover and fracturing operations of oil and gas wells
US5566759A · kind A · utility
30Cited by
8References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1995 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Jan 9, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/90
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method is shown for reducing the viscosity of a cellulose-containing fluid used during workover, fracturing or well completion operations. An enzyme system is used to degrade the polymer, whereby the fluid can be removed from the subterranean formation to the well surface. The enzyme systems are effective over broad pH and temperature ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.