Junk catcher and a method of operation of same

Abstract

This invention relates to a junk catcher () releasably connected to a retrievable bridge plug () connectable to a setting tool () for joint deployment of bridge plug () and junk catcher () in a borehole () or a tubular in the borehole (). Setting tool () extends through a fishing neck (), a catcher tube (), a flanged section (), a valve chamber (), a closable opening () and a portion of a setting sleeve () of junk catcher (). Valve chamber () comprises a valve () arranged to close closable opening () after retrieval of setting tool () from junk catcher (). The junk catcher () is connected to bridge plug () by at least one shear bolt (). Bridge plug () comprises a plug fishing neck () facing junk catcher (), and bridge plug () comprises an equalizing channel () in a mandrel (). The equalizing channel () extends from a bull nose () of bridge plug (), and where junk catcher () is provided with a closing sleeve (), closing sleeve () is connected to bridge plug () by at least one shear bolt (), and closing sleeve () seals at least one equalizing port () in mandrel () when bridge plug () is set. A method for operating bridge plug () and junk catcher () assembly is also described.