Apparatus for setting and retrieving a bridge plug from a subterranean well

摘要: An apparatus for setting and retrieving a bridge plug of the type which may be passed through small diameter tubing, sealed against relatively large casing by pressured fluid to inflate an elastomeric packing element carried plug. The running tool is engagable with valve housing J-slot connection axially shiftable, pressure balanced cooperates open or close passageway therethrough extending inflatable element. Upward movement followed left hand rotation effects closing disengagement tool. Downward tool, while engaged housing, opening valve.