Systems and devices for fluid decoking

A decoking system comprising a labyrinth guide plate and a decoking tool, wherein:

• the labyrinth guide plate comprises a first plate and a second plate;
• the first plate comprises a first fluid blocking potion and a first vapor release orifice;
• the second plate comprises a second fluid blocking potion and a second vapor release orifice;
• the first plate and the second plate are offset by a vapor release gap, wherein the first vapor release orifice skewed with respect to the second vapor release orifice;
• the decoking tool operates within a coke drum and below the labyrinth guide plate and comprises a tool body, a diverter plate, a diverter body, a plurality of flow paths and a shifting apparatus;
• the tool body comprises a fluid inlet for receiving a pressurized fluid;
• the diverter plate is in fluid communication with the fluid inlet, the diverter plate defining at least one selection orifice disposed therethrough;
• the diverter body is 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;
• the plurality of flow paths comprise 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;
• and
• the shifting apparatus is 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 the 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.