Resistivity logging tool with excitation current control based on multi-cycle comparison
US9696451B2 · kind B2 · utility
3Cited by
26References
20Claims
0Family size
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Key dates
| Filing date | Jun 10, 2014 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Jun 10, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A resistivity logging system includes a plurality of excitation electrodes, at least one return electrode, and a plurality of monitor electrodes. The resistivity logging system also includes a controller that determines a level of excitation current to be emitted by at least one of the plurality of excitation electrodes during a subsequent excitation cycle based on a comparison of measured downhole parameter values corresponding to excitation current emitted in two previous excitation cycles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.