Douglas P Adams

US Patent:

47383992, Apr 19, 1988

Filed:

Nov 25, 1985

Appl. No.:

6/801353

Inventors:

Douglas Adams - West Orange NJ

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

C10C 318

US Classification:

239447

Abstract:

A hydraulically operated decoking tool capable of performing both boring and cutting operations with a simplified changeover between the operations that does not require removal of the tool from a coke bed is disclosed. The tool includes a body fabricated of durable material capable of withstanding the harsh environment in which it is used. Boring nozzles for boring a pilot hole in a coke bed and cutting nozzles for cutting up the coke for removal are provided on the tool. A coke bed is bored and cut by high pressure working fluid directed through the nozzles in a predetermined sequence. In the normal sequence, the boring operation is performed first followed by the cutting operation. The sequence of operations is controlled by a working fluid actuated shuttle sleeve or valve reciprocally mounted in the tool body. The sleeve is reciprocated by working fluid pressure moving from a first position corresponding to the boring operation to a second position corresponding to the cutting operation.