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Process for decoking a delayed coker

  • US 4,959,126 A
  • Filed: 05/25/1988
  • Issued: 09/25/1990
  • Est. Priority Date: 05/25/1987
  • Status: Expired due to Term
First Claim
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1. A process for decoking at least one residual oil delayed coke reactor comprising:

  • pumping water at high pressure through a flexible pipeline suspended vertically with respect to the reactor by channeling the water through a path passing axially through an axis of a hollow drive shaft of a reel around which the flexible pipeline is looped and then channeling the water radially of the drive shaft and into a first end of the flexible pipeline;

    ejecting the water from a nozzle array connected to a second end of the flexible pipeline in a downward direction with respect to the axis of the reactor at a first pressure while unreeling the flexible pipeline from the reel to drill a hole through the coke in the coke reactor;

    changing the water pressure from a first pressure to a second pressure; and

    ejecting the water from the nozzle array in a lateral direction at the second pressure to cut and discharge coke lining the bore from the reactor while reeling the flexible pipeline on the reel.

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