Gripping assembly for expandable tubulars
US7306034B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 18, 2005 |
| Grant date | Dec 11, 2007 |
| Priority date | — |
| Expiry date | Apr 12, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49936
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Grip between a tubular being expanded and the surrounding tubular is enhanced by disposing a wire in a groove. The wire is preferably harder than the surrounding tubular so that it can dig in upon expansion. The wire is mounted in the groove so that it is not stretched due to the expansion and for that reason doesn't increase the effort required for the expansion. The wire can take the shape of the groove that it is in or it can have some other shape. The wire can be solid or hollow and can be in segments such as rings or can be a longer continuously extending wire in a groove that, for example, can be helically disposed on the tubular being expanded or even on a sleeve surrounding it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.