Telemetry system, current sensor, and related methods for a drilling system
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United States of America Patent
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Oct 17, 2017
Grant Date -
Nov 26, 2015
app pub date -
May 20, 2014
filing date -
May 20, 2014
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Abstract
This disclosure includes a current sensor configured to detect a signal current in a drilling system component of a drilling system, a telemetry system, and a method for detecting a signal current. The current sensor includes a magnetic body, at least one field coil positioned on the magnetic body, and at least one drive coil positioned on the magnetic body. The at least one field coil configured to detect a first magnetic field that passes within the magnetic body that is induced by the signal current carried by the drill system component when the current sensor is positioned in proximity to the drilling system component. The at least one drive coil configured to generate a second magnetic field. The current sensor is configured to modulate the second magnetic field such the at least one field coil detects the modulated magnetic field.
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