Centralizer and associated devices
US10047574B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 2015 |
| Grant date | Aug 14, 2018 |
| Priority date | — |
| Expiry date | Jul 18, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/1078
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A centralizer, a device and a system. An example centralizer includes: a longitudinal axis, and first and second opposing end collars positioned around the axis of the centralizer; and a plurality of spring bows extending from the first end collar via a generally convex curved portion to the second end collar. A radial distance from an outwardly facing portion of the first end collar to the axis is: greater than a radial distance from a first outwardly facing portion of a spring bow of the plurality of spring bows, at a longitudinal axial position where the spring bow extends from the first end collar, to the axis; and less than a radial distance from a second outwardly facing portion of the spring bow, at a longitudinal axial position between the first end collar and the second end collar that is farthest from the axis, to the axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.