Axially compressed and radially pressed seal
US9617823B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2012 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Jul 1, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/128
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus and method for sealing against a bore in a soil formation. The apparatus comprises an elongate central member having a resilient tubular seal member extending between first and second ends therearound, a longitudinally moveable plunger surrounding the central member having a first wedge engagable upon the first end of the seal member and a backing ring engaging upon the second end of the seal member. The plunger is axially movable along the central member to compress the seal member between plunger and the packing ring and to press the first end of the seal member in a radially outward direction. The method comprises a locating the apparatus at a desired location and axially moving the plunger towards a corresponding backing ring so as to compress the seal member between plunger and the packing ring and to press the seal member in a radially outward direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.