Patent ID: 9267331
Filing Date: 2016-02-23
CPC Classification: E21B

Claim Text:
1. An expandable reamer for use in a borehole in a subterranean formation, comprising: a housing defining an internal bore; at least one blade supported by the housing, the at least one blade being movable between an extended position and a retracted position; a travel sleeve located within the internal bore and detachably connected to the housing, the travel sleeve defining an internal flow path and comprising a first obstruction engagement, at least one first port at a first longitudinal position, and at least one second port at a second, upper longitudinal position, wherein the travel sleeve is located in a first sleeve position when connected to the housing and is movable from the first sleeve position to a second, different sleeve position when disconnected from the housing; and a trigger sleeve located within the internal flow path of the travel sleeve and detachably connected to the travel sleeve, the trigger sleeve defining an internal flow bore and comprising a second obstruction engagement, wherein the trigger sleeve is located in an unobstructed position in which the at least one second port is unobstructed by the trigger sleeve when the trigger sleeve is connected to the travel sleeve and the trigger sleeve is movable from the unobstructed position to an obstructed position in which the at least one second port is obstructed by the trigger sleeve when the trigger sleeve is disconnected from the travel sleeve, wherein the at least one blade is in the retracted position when the travel sleeve is in the first sleeve position and the trigger sleeve is in the unobstructed position, the at least one blade is movable to the extended position when the travel sleeve is in the second sleeve position and the trigger sleeve is in the unobstructed position, and the at least one blade is in the retracted position when the travel sleeve is in the second sleeve position and the trigger sleeve is in the obstructed position.