Tubing centralizer
US9051791B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2012 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | Jun 7, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/1028
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention is a tubing centralizer for use within casing within a wellbore. The tubing centralizer has a tubing centralizer cage comprising a top ring, a middle ring, and a bottom ring and a plurality of springs, where each spring connects the top ring to the middle ring and the middle ring to the bottom ring and where each spring has a double arcuate shape such that the springs arc radially outward between the top ring and the middle ring and again between the middle ring and the bottom ring. The springs may be sized such that they exert outward pressure against the inside wall of the casing such that the tubing centralizer resists movement along the casing. The tubing centralizer may further comprise a tubing centralizer mandrel, where the tubing centralizer mandrel is part of the tubing string and extends through the tubing centralizer cage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.