Inertial compensation for a quill oscillator
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United States of America Patent
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Sep 26, 2023
Grant Date -
Oct 21, 2021
app pub date -
Apr 13, 2021
filing date -
Apr 15, 2020
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A drilling system configured to reduce friction during slide drilling. The drilling system has a drill string comprising a fluid-driven drill stage such as a mud motor; a variable frequency drive configured to oscillate the drill string via a quill and a sensor array. The sensor array measures the torque applied to the quill and the angular position of the quill. A controller is used to control the variable frequency drive based on the determined applied torque and quill angular position to meet predetermined oscillation turn-around criteria and to reduce the time to reduce the angular velocity of the quill from a maximum rotational speed to zero in an oscillation cycle.
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