Steam generation method and method for recovering crude oil by steam-assisted gravity drainage (SAGD) including said steam generation method
US9604864B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 12, 2014 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | May 23, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2301/046
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The method include (a) compressing the feed water at a low pressure; (b) filtering the feed water; (c) compressing the filtered water stream at a medium pressure; (d) supplying the filtered water stream, compressed at a medium pressure, in the liquid phase of an instant expansion tank; (e) in the tank, heating the stream of step (d) by mixing with the recycled stream (h); (f) compressing again at a high pressure the liquid fraction in the tank and supplying it to the heat exchanger inlet; (g) heating the liquid fraction in the exchanger while maintaining the liquid fraction in the liquid state; (h) recycling the fraction from the step (g) in the tank; and (i) expanding the stream of the step (h) in the expansion tank, generating by instant expansion the searched steam; and (j) separating the solid particles formed as a second blowdown containing water and the particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.