Drilling fluid and filter cake removal methods and compositions
US5501276A · kind A · utility
70Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1994 |
| Grant date | Mar 26, 1996 |
| Priority date | — |
| Expiry date | Sep 15, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/928
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods and compositions for removing gelled and dehydrated drilling fluid and filter cake from the walls of wellbores are provided. The methods basically include contacting the drilling fluid and filter cake with a removal composition comprised of an aqueous sugar solution for a period of time sufficient to cause the disintegration of the drilling fluid and filter cake. The composition, having the disintegrated drilling fluid and filter cake dispersed therein, is then displaced from the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.