| 摘要 |
A junk catcher (2, 2') where the junk catcher (2, 2') is releasable connected to a retrievable bridge plug (4, 4'), the retrievable bridge plug (4, 4') being connectable to a setting tool (6) for the joint deployment of the bridge plug (4, 4') and the junk catcher (2, 2') in a borehole (9) or a tubular in the borehole (9), the setting tool (6) is extending through a fishing neck (12), a catcher tube (14), a flanged section (16), a valve chamber (18), a closable opening (20) and a portion of a setting sleeve (22, 22') of the junk catcher (2, 2'), the valve chamber (18) comprises a valve (50) arranged to close the closable opening (20) after retrieval of the setting tool (6) from the junk catcher (2, 2'), the junk catcher (2, 2') is connected to the bridge plug (4, 4') by at least one shear bolt (27, 38), the bridge plug (4, 4') comprises a plug fishing neck (32, 32'); facing the junk catcher (2, 2'), and the bridge plug (4, 4') comprises an equalizing channel (71) in a mandrel (7), the equalizing channel (71) extending from a bull nose (41) of the bridge plug (4, 4'), and where the junk catcher (2, 2') is provided with a closing sleeve (26, 26'), the closing sleeve (26, 26') is connected to the bridge plug (4, 4') by at least one shear bolt (38, 38'), and the closing sleeve (26, 26') seals at least one equalizing port (73) in the mandrel (7) when the bridge plug (4, 4') is set. A method for operating the bridge plug (4, 4') and junk catcher (2, 2') assembly is described as well. |
