Sealing device for plugging a pipe or a well
US7584787B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 2005 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Oct 8, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/134
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The device is a sleeve that is radially expandable under the action of an inflation fluid so as to press the sleeve hermetically against a wall. The sleeve includes firstly a pair of cylindrical membranes having walls that are flexible and elastic, the membranes being engaged coaxially one inside the other, comprising an inner membrane for being subjected internally to the pressure of the inflation fluid, and an outer membrane for being pressed against the wall of the pipe or the well in order to provide sealing, and secondly, interposed between said membranes, at least one very dense annular fiber structure made up of a multitude of fine and long fibers having high mechanical strength that interconnect said end members and that are wound helically around the inner membrane, said winding being such that the density of the fibers diminishes from each end towards the central portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.