Tool coupler with threaded connection for top drive
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United States of America Patent
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Apr 2, 2019
Grant Date -
Sep 13, 2018
app pub date -
Mar 13, 2017
filing date -
Mar 13, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
Coupling a top drive to tools. A drive unit includes a drive stem having torque gear profile, threaded load coupling, torque sleeve movable between first position and second position, a sleeve gear profile engaging the torque gear profile when in second position; or spindle unit and annular motor coupled to the spindle unit; or drive stem having first friction surfaces; transmission unit having second friction surfaces parallel to first friction surfaces; and transmission selector movable to an “on” or an “off” position. A method may include rotating a drive stem of drive unit, threading coupling with a tool stem of tool adapter; moving a torque sleeve of drive unit to engage a torque gear profile of the drive stem and a stem gear profile of the tool stem; or rotating a spindle unit relative to drive stem to contact a counter nut of spindle unit with the tool stem.
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