Multi-capacitor system for electromagnetic logging tool
US8836335B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 2012 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Mar 12, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for estimating a property of an earth formation penetrated by a borehole includes: a borehole carrier; a first switchable-magnet; a first energy storage device coupled to the first switchable magnet; a second switchable-magnet; a second energy storage device coupled to the second switchable-magnet; at least one voltage source having a first polarity and a second polarity opposite of the first polarity; and an electrical circuit configured to charge the first energy storage device and the second energy storage device at the same time and to sequentially discharge the first energy storage device and the second energy storage device, the electrical circuit being further configured to charge the first and second energy storage devices to the first polarity and then charge the first and second energy storage devices to the second polarity after the first and second energy storage devices are discharged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.