Rotary steerable reamer lock and methods of use

A method of underreaming a wellbore comprising:

• rotating a drilling shaft coupled to a drill bit about its axis and relative to a housing to form a wellbore;
• engaging a first locking mechanism rotatably coupled to the drilling shaft with a second locking mechanism coupled to the housing having an expandable reamer attached thereto to rotatably couple the drilling shaft and the housing;
• expanding the expandable reamer attached to the housing into engagement with the wellbore;
• rotating the expandable reamer to widen at least a portion of the wellbore uphole from the drill bit;
• and
• activating one or more actuators positioned within the housing to selectively engage the first locking mechanism with the second locking mechanism by exerting a force sufficient to slide the second locking mechanism along a longitudinal axis of the drilling shaft and expand the expandable reamer by exerting a force sufficient to move the expandable reamer outward in the radial direction at the same time.

A method of freeing a bottom-hole assembly comprising:

• determining that a housing coupled to a drilling shaft is trapped in a portion of a wellbore;
• engaging a first locking mechanism coupled to the drilling shaft and a second locking mechanism coupled to the housing to rotationally couple the drilling shaft to the housing;
• expanding an expandable reamer attached to the housing to contact a portion of the wellbore;
• rotating the drilling shaft to rotate the housing;
• and
• activating one or more actuators positioned within the housing to selectively engage the first locking mechanism with the second locking mechanism by exerting a force sufficient to slide the second locking mechanism along a longitudinal axis of the drilling shaft and expand the expandable reamer by exerting a force sufficient to move the expandable reamer outward in the radial direction at the same time, wherein the drilling shaft is rotatable relative to the housing when the first locking mechanism and second locking mechanism are unengaged and the drilling shaft is rotatably coupled to the housing when the first locking mechanism and second locking mechanism are engaged.