×

System and method for measurement incorporating a crystal resonator

  • US 9,201,156 B2
  • Filed: 03/29/2012
  • Issued: 12/01/2015
  • Est. Priority Date: 03/29/2012
  • Status: Active Grant
First Claim
Patent Images

1. A system for interrogating a downhole environment in a borehole beneath a surface, comprising:

  • a source of electromagnetic energy, operable to transmit an electromagnetic signal in the borehole;

    a sensor module, comprising a passive resonating circuit, the passive resonating circuit comprising a crystal having a resonant frequency that varies with changes in the condition in the downhole environment such that the resonating circuit returns at least a portion of the electromagnetic signal in response to a condition in the downhole environment in the borehole;

    a detector configured and arranged to detect a power level of the source of electromagnetic energy; and

    a resonant frequency identifying circuit configured and arranged to identify the resonant frequency based on the detected power level.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×