System and method for parameter measurement in well
First Claim
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1. A method for measuring a parameter within a well, the method comprising:
- connecting a gauge to a first end of a cable and connecting a vector network analyzer to a second end of the cable;
lowering the gauge inside the well;
generating a signal with the vector network analyzer and sending the signal along the cable to the gauge;
sweeping a frequency of the signal within a given range while feeding the signal to the gauge;
determining a resonance frequency of at least one sensor located within the gauge; and
calculating the parameter from the resonance frequency of the at least one sensor using a calibration system that includes a polynomial fit calibration engine.
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Abstract
System and method for measuring a parameter within a well. The method includes connecting a gauge to a first end of a cable and connecting a vector network analyzer to a second end of the cable, lowering the gauge inside the well, generating a signal with the vector network analyzer and sending the signal along the cable to the gauge, sweeping a frequency of the signal within a given range while feeding the signal to the gauge, determining a resonance frequency of at least one sensor located within the gauge, and calculating the parameter from the resonance frequency of the at least one sensor.
7 Citations
17 Claims
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1. A method for measuring a parameter within a well, the method comprising:
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connecting a gauge to a first end of a cable and connecting a vector network analyzer to a second end of the cable; lowering the gauge inside the well; generating a signal with the vector network analyzer and sending the signal along the cable to the gauge; sweeping a frequency of the signal within a given range while feeding the signal to the gauge; determining a resonance frequency of at least one sensor located within the gauge; and calculating the parameter from the resonance frequency of the at least one sensor using a calibration system that includes a polynomial fit calibration engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for measuring a parameter within a well, the system comprising:
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a vector network analyzer located above ground; a gauge having at least one sensor having a resonant frequency that changes with the parameter, the gauge being adapted to be located within the well; a cable connecting the gauge to the vector network analyzer; and a computing device that calculates a reflection coefficient associated with (i) an energy incident along the cable toward the gauge and (ii) an energy reflected from the gauge, along the cable, to the vector network analyzer, the computing device including a polynomial fit calibration engine that uses frequency calibration data obtained in a controlled environment. - View Dependent Claims (13, 14, 15, 16)
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17. A computing device for measuring a parameter within a well, the computing device comprising:
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an interface connected to a vector network analyzer; and a processor connected to the interface and configured to control the vector network analyzer to generate a signal and send the signal along a cable to a gauge located within the well, control the vector network analyzer to sweep a frequency of the signal within a given range while feeding the signal to the gauge, determine a resonance frequency of a sensor located within the gauge; and calculate the parameter with a calibration engine based on the resonance frequency using a calibration system that includes a polynomial fit calibration engine, wherein the resonance frequency changes with the parameter.
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Specification