摘要:
The unplugging apparatus includes a conduit which extends through the wall of an annular member to a generally cylindrical lance housing disposed within the annular member. The upper end of the lance (41) housing is disposed above and proximate the elevation of the conduit (43). A bushing is disposed within the housing at its upper end and guides upward movement of a tube (47) which is partially disposed within the housing. The tube carries a charge of combustible material and has an upper end disposed outside the housing and a bottom flared portion disposed within the housing. The bushing defines a stop surface for the bottom flared portion of the tube. A combustible collar (75) is mounted on the tube upper end and surrounds a portion of the charge of combustible material which extends past the tube upper end.
摘要:
The unplugging apparatus includes a conduit which extends through the wall of an annular member to a generally cylindrical lance housing disposed within the annular member. The upper end of the lance (41) housing is disposed above and proximate the elevation of the conduit (43). A bushing is disposed within the housing at its upper end and guides upward movement of a tube (47) which is partially disposed within the housing. The tube carries a charge of combustible material and has an upper end disposed outside the housing and a bottom flared portion disposed within the housing. The bushing defines a stop surface for the bottom flared portion of the tube. A combustible collar (75) is mounted on the tube upper end and surrounds a portion of the charge of combustible material which extends past the tube upper end.