Rotational locking mechanisms for drilling motors and powertrains
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United States of America Patent
Stats
-
Jun 28, 2016
Grant Date -
Nov 28, 2013
app pub date -
Mar 14, 2013
filing date -
May 25, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Rotational locking mechanisms for drill string assemblies, bottom hole assemblies, and drilling motors are presented herein. A fluid-driven motor assembly is disclosed for use in a drill string to drill a borehole in an earth formation. The drill string includes a drill pipe and a drill bit. The motor assembly includes a housing that is configured to operatively connect to the drill pipe of the drill string to receive drilling fluid therefrom. A stator, which is disposed within the housing, is configured to rotate at a stator speed. A rotor is disposed within the stator and coupled to the drill bit. The rotor is configured to rotate at a rotor speed. The motor assembly also includes a rotational locking assembly operatively coupled to the rotor and the housing. The rotational locking assembly is configured to prevent the stator speed of the stator from exceeding the rotor speed of the rotor.
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