Patent ID: 6719052
Filing Date: 2004-04-13
Classification: E21B

Abstract:
A fishing tool guiding mechanism, comprising:a mandrel assembly adapted to attach to a work string for lowering into a well bore or casing; a piston mounted to said mandrel assembly for movement between an uphole position and a downhole position relative to said mandrel assembly; a fluid passage routed to apply fluid pressure to move said piston from one of said downhole position and said uphole position to the other of said downhole position and said uphole position; a plurality of elongate fingers, each said finger having an uphole end pivotably attached to a downhole end of said mandrel assembly, each said finger having a free downhole end; and a sleeve attached to said piston for movement with said piston between uphole and downhole positions, said sleeve being adapted to forcibly pivot said downhole ends of said plurality of fingers radially outwardly a sufficient distance to forcibly contact an inner surface of a well bore or casing, when said sleeve is in one of its said downhole position and its said uphole position.