Differential filters for stopping water during oil production
US7637320B2 · kind B2 · utility
12Cited by
4References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2006 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Mar 16, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/0471
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A differential filter includes a swellable polymer that swells after contacting water such that permeability of the differential filter is reduced. A method of controlling water production in a well includes deploying a differential filter downhole; and performing a downhole operation, wherein the differential filter comprises a swellable polymer that swells after contacting water such that permeability of the differential filter is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.