Method for the recovery of oil
US4191252A · kind A · utility
15Cited by
12References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1978 |
| Grant date | Mar 4, 1980 |
| Priority date | — |
| Expiry date | May 19, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Recovery of heavy oil involves injecting a solvent eg. toluene for the oil in admixture with either (i) a steam distillable surfactant eg.butylamine or (ii) a short lived surfactant eg. a petroleum sulphonate and then injecting steam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.