Well tool having magnetically coupled position sensor
US7779912B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2007 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Apr 18, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/09
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well tool having a magnetically coupled position sensor. In operation of a well tool, relative displacement is produced between members of the well tool. A magnetically coupled position sensor includes one magnet assembly attached to a member for displacement therewith and another magnet assembly movably attached to the other member and magnetically coupled to the first magnet assembly for displacement therewith. The position sensor further includes a magnetically permeable material which increases a magnetic flux density between the magnet assemblies. The magnetically permeable material may be positioned between magnets of the magnet assemblies and/or spaced apart therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.