System and method for measurement incorporating a crystal resonator
US9097101B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2012 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Jul 18, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/30
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system, method and device for interrogating a downhole environment in a borehole beneath a surface includes a source of electromagnetic energy, operable to transmit an electromagnetic signal in the borehole, a sensor module, including a passive resonator having a resonant frequency that varies with changes in the condition in the downhole environment to reflect the electromagnetic signal and generates harmonic frequencies in response to a condition in the downhole environment in the borehole and a detector positionable to receive a returned electromagnetic signal. Embodiments include a filter to pass a harmonic of the resonant frequency of the resonating circuit and circuitry configured and arranged to measure the frequency of the harmonic signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.