Integrated calibration transceiver for downhole tools
AssigneeSchlumberger Technology Corporation
InventorsDaniel Fernandez, Mark Frey
Life of this patent
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Abstract
A calibration system includes a test loop placed over one or more antennas of a logging tool, an integrated calibration transceiver, wherein the integrated calibration transceiver is disposed in an electronic chassis of the logging tool, and a port disposed in the logging tool and configured to receive a connector of the test loop to connect the test loop to the integrated calibration transceiver, wherein the integrated calibration transceiver is configured to generate a test signal to drive the test loop and receive the test signal from the test loop.
Claims20
A calibration system, comprising:
- a test loop placed over one or more antennas of a logging tool;
- an integrated calibration transceiver, wherein the integrated calibration transceiver is disposed in an electronic chassis of the logging tool;
- and
- a port disposed in the logging tool and configured to receive a connector of the test loop to connect the test loop to the integrated calibration transceiver, wherein the integrated calibration transceiver is configured to generate a test signal to drive the test loop and receive the test signal from the test loop.
A calibration system, comprising:
- a test loop placed over one or more antennas of a logging tool;
- an integrated calibration transceiver installed on an electronic chassis of the logging tool comprising:
- a controller;
- a clock configured to perform synchronization operations of the integrated calibration transceiver;
- an amplifier coupled to the controller and configured to apply a gain to a test signal of the integrated calibration transceiver;
- and
- a test loop/calibration select switch coupled to the amplifier and configured to provide the test signal to the amplifier;
- and
- a port disposed in the logging tool and configured to receive a connector of the test loop to communicatively couple the test loop to the integrated calibration transceiver, wherein the integrated calibration transceiver is configured to generate the test signal to drive the test loop and receive the test signal from the test loop.
A method, comprising:
- obtaining first calibration data for a first antenna of a logging tool via an integrated calibration transceiver disposed in an electronic chassis of the logging tool;
- obtaining second calibration data for a second antenna of the logging tool via the integrated calibration transceiver;
- computing a ratio between the first calibration data and the second calibration data;
- and
- calibrating the first antenna with respect to the second antenna using the ratio.
Dependencies are inferred from the claim text.