Filter for subterranean wells
US5664628A · kind A · utility
109Cited by
92References
94Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1994 |
| Grant date | Sep 9, 1997 |
| Priority date | — |
| Expiry date | Dec 7, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/188
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A damage-resistant filter for use in subterranean wells has at least one layer of a filter medium, such as a sintered supported porous membrane, coaxially disposed about a perforated support member. The filter may also include a drainage layer disposed between the inner support member and the filter medium, and a protective covering, such as a perforated cage, surrounding the filter medium. The filter is particularly suitable for removal of sand and other particulates from fluids produced in a well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.