Expansion enhancement device
US7661473B2 · kind B2 · utility
3Cited by
18References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 13, 2007 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Aug 4, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/105
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Nested articulated split rings move relatively to each other to enlarge their outer dimension for a grip on a surrounding tubular or the wellbore. The rings can be articulated to enlarge their outside dimension with relative movement that can be initiated by dimensional expansion from within the tubular or manipulation of the tubular that creates the desired relative movement. The relative movement can be locked in after it is made to secure the grip. Different shape profiles that magnify the radial outer dimension in excess of the percentage dimensional change in the underlying tubular are contemplated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.