Centraliser for an expandable tubular element in a wellbore
US7140431B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 2002 |
| Grant date | Nov 28, 2006 |
| Priority date | — |
| Expiry date | Jan 13, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/1021
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A centralizer is disclosed for stabilizing a radially expandable tubular element extending in a wellbore drilled into an earth formation. The centralizer has a tubular member selected from a section of the tubular element and a sleeve surrounding the tubular element, and at least one centralizer blade, each blade including a first arm connected to the tubular member in a manner allowing the first arm to hinge relative the tubular member between a radially retracted position and a radially extended position thereof, and a second arm connected to the tubular member at a point circumferentially spaced from the point of connection of the first arm to the tubular member. The second arm has an end part connected to the first arm so as to induce movement of the first arm from the retracted position to the extended position upon radial expansion of the tubular member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.