Patent ID: 8464812

Claim:
An expandable apparatus, comprising: a tubular body comprising a fluid passageway extending therethrough and first nozzles extending through the tubular body; a valve housing disposed within the tubular body, the valve housing comprising a fluid port opening into an annular chamber disposed between the valve housing and the tubular body; a valve piston disposed within the valve housing, the valve piston comprising a surface configured to move the valve piston axially responsive to drilling fluid pressure and a second nozzle configured to selectively align and misalign with the port of the valve housing, the valve piston configured to move axially relative to the tubular body from a first, neutral position to a second, locked open position responsive to a pressure of drilling fluid passing through the fluid passageway to exert a force on the surface, wherein the second nozzle is misaligned with the fluid port when the valve piston is in the first, neutral position and the second nozzle is aligned with the fluid port when the valve piston is in the second, locked open position; and a push sleeve disposed within the tubular body and coupled to at least one expandable feature, the push sleeve configured to move axially responsive to the flow of fluid into the annular chamber and extend the at least one expandable feature, the push sleeve comprising nozzle ports extending through the push sleeve to provide fluid communication with the first nozzles, wherein the first nozzles and the nozzle ports are always open, wherein the at least one expandable feature is in a retracted position when the valve piston is in the first, neutral position and is movable to an extended position when the valve piston is in the second, locked open position.