Method of making a centering device and centering device formed by that method
US6997254B2 · kind B2 · utility
37Cited by
9References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 19, 2002 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Nov 12, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49609
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A spring centralizer device for supporting a tubular member spaced from the wall of a bore is made from a single piece of boron steel material. The spring centralizer device has first and second collars spaced apart along a longitudinal axis. Spring bow portions extend between the collars. As the device is made from a single piece of material, the material extends seamlessly from each collar portion through the bow portions so that there are no joins or points of weakness. Use of boron steel means that the device can be made by cold forming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.