Patent ID: 9611697
Date: 2017-04-04
CPC Classifications: E21B

Claim:
1. An expandable apparatus for use in a subterranean formation, comprising: an elongated body including one or more components and comprising a drilling fluid path; at least one of a plurality of blades and a plurality of bearing pads movably mounted to the an actuation mechanism configured to move the at least one of the plurality of blades and the plurality of bearing pads simultaneously and repeatably between the retracted position and the at least one extended position and operable in combination with a drive source selected from the group consisting of pressure of drilling fluid within the drilling fluid path and fluid pressure generated downhole and the actuation mechanism comprises at least one of a hydraulically actuated valve and an electrically actuated valve to selectively control application of the pressure of drilling fluid within the drilling fluid path or the fluid pressure generated downhole to effect the simultaneous, repeatable movement of the at least one of the plurality of blades and the plurality of bearing pads.