Assembly for sealing the annulus between concentric cylindrical surfaces
US6176310A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1999 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Feb 19, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An assembly for sealing the annular space between the inner cylindrical surface of a tubular member and the outer surface of a cylindrical member having a separate upper and lower seal member each of which are sealably and translatably positioned on the cylindrical member outer cylindrical surface, each of the upper and lower seal members having a circumferentially outwardly displaceable sealing lip and including a tubular actuator positioned between the upper and lower seal members having end portions for radially outwardly displacing the upper and lower sealing lips and including a downwardly displaceable seal energizer for moving the upper seal member towards the lower seal member to cause the actuator to concomitantly, radially outwardly expand the circumferential sealing lips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.