Method for cleaning drilling fluid solids from a wellbore using a surfactant composition
US5874386A · kind A · utility
67Cited by
19References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1998 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Feb 13, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/524
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided drilling fluid solids from a wellbore using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol by injecting the composition into the wellbore, maintaining the composition in the wellbore for a selected time and thereafter producing the composition from the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.