Device which is expandable to engage the interior of a tube
US7481461B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2006 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Jul 16, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S285/921
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A device which is expandable to engage the interior of a tube, for example the casing of an oil well, comprises first and second tubular members in partial telescopic engagement with each other, the first tubular member having an end region which is received on the second tubular member and which is expandable radially outwardly to engage the interior of the tube. The second tubular member has tapered regions which, when forced into the end region, will cause radial expansion of the end region. The taper angle of the second tapered zone is less than the taper angle of both the first tapered zone and the third tapered zone. The fourth tapered zone preferably has a taper angle which is greater than that of the second tapered zone and less than that of the third tapered zone. In one embodiment, the tapered zones have respective taper angles of 15°, 1°, 5° and 1.25°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.