Patent ID: 8770494
Filing Date: 2014-07-08
Classification: C10B

Abstract:
1. A decoking tool comprising: a tool body comprising a fluid inlet for receiving a pressurized fluid; a diverter plate in fluid communication with the fluid inlet, the diverter plate defining at least one selection orifice disposed therethrough; a diverter body in fluid communication with the diverter plate through the at least one selection orifice, the diverter body defining therein at least one clearing orifice, at least one cutting orifice and at least one boring orifice; a plurality of flow paths comprising a clearing flow path, a cutting flow path and a boring flow path each of which terminates in a nozzle that is placed in selective fluid communication with the pressurized fluid through the diverter plate and the respective orifice in the diverter body, wherein the nozzle that terminates the clearing flow path is directed substantially upwards during normal operation of the decoking tool; a pressure regulating nozzle disposed within the tool body and in fluid communication with the clearing flow path such that excess pressure that builds up within the clearing flow path is conveyed through the pressure regulating nozzle to a location outside of the tool body; and a shifting apparatus operatively coupled to at least one of the diverter plate and the diverter body such that upon operation of the shifting apparatus, the diverter plate and the diverter body rotate relative to one another to substantially align the at least one selection orifice and at least one of the at least one clearing orifice, the at least one cutting orifice and the at least one boring orifice in order to establish fluid communication between the fluid inlet and the respective nozzle.