Position sensor for well tools
US8196656B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 2008 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Nov 14, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A position sensor for well tools. A position sensor includes an indicator portion including a carrier supporting a resistive element and at least one contact, and a support device for supporting the carrier. Another position sensor includes an indicator portion including a slider for displacing at least one contact relative to a resistive element, the slider being displaceable between first and second limits, and an end load mechanism including a biasing device which exerts a biasing force on the slider as the slider approaches at least the first limit. Another position sensor includes an indicator portion including a resistive element and at least one contact which contacts and displaces across the resistive element, a change in position of the contact relative to the resistive element being indicated by a resistance change as the contact displaces across the resistive element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.