Patent ID: 8727041

Claim:
An expandable apparatus for use in a subterranean borehole, comprising: a tubular body having a longitudinal bore and at least one opening in a wall of the tubular body; at least one member positioned within the at least one opening in the wall of the tubular body, the at least one member configured to move between a retracted position and an extended position; and a sleeve member disposed in the tubular body and having a longitudinal bore forming a fluid passageway through the sleeve member to allow fluid to flow therethrough, the sleeve member comprising a constricted portion of the longitudinal bore having a cross-sectional area less than a cross-sectional area of an adjacent portion of the longitudinal bore, the constricted portion constricting the fluid passageway through the sleeve member to enable displacement of the sleeve member in a downhole direction responsive to a selected flow rate to a displaced position, wherein: in an initial position, the sleeve member retains the at least one member in the retracted position by forcing a locking member coupled to the at least one member into engagement with the tubular body; in the displaced position the sleeve member allows the at least one member to move to the extended position by enabling the locking member to disengage with the tubular body; and the sleeve member is biased in an uphole direction in order to return the sleeve to the initial position from the displaced position to reengage the locking member with the tubular body; and the sleeve member further comprises a guide portion configured to travel along a shoulder formed within the longitudinal bore of the tubular body when the sleeve member is moved between the initial position and the displaced portion.