In one aspect of the invention, a method for drilling a bore hole includes
the steps of deploying a drill bit attached to a drill string in a well
bore, the drill bit having an axial jack element with a distal end
protruding beyond a working face of the drill bit; engaging the distal
end of the jack element against the formation such that the formation
applies a reaction force on the jack element while the drill string
rotates; and applying a force on the jack element that opposes the
reaction force such that the jack element vibrates and imposes a resonant
frequency into the formation.