Patent ID: 10041319

Abstract:
According to one aspect, a downhole apparatus includes an anchor element mechanically coupled between first and second housings and linked to move radially between first and second radial positions; and a high torque electromechanical transmission drive; wherein the anchor element is adapted to engage a preexisting structure when the downhole apparatus extends within the preexisting structure, the high torque electromechanical transmission drive is energized, and the anchor element is in the second radial position; and wherein the high torque electromechanical transmission drive is failsafe in that the anchor element is permitted to move radially from the second radial position towards the first radial position in response to de-energization of the high torque electromechanical transmission drive. In several embodiments, the preexisting structure is a casing positioned within a wellbore that traverses a subterranean formation.