Cleaning coke deposits from process equipment
AssigneeChevron Phillips Chemical Companv LP
InventorVincent dePaul Mcgahee
Life of this patent
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Abstract
A method for cleaning a coke deposit from an internal surface of a process equipment, comprising removing at least a portion of the coke deposit from the internal surface using a flexible pig comprising a plurality of bristles, without damaging a metal protective layer of the internal surface of the process equipment. A flexible pig for cleaning a coke deposit from an internal surface of a process equipment without damaging a metal protective layer of the internal surface, comprising a flexible body formed of a polymeric material, and a plurality of bristles partially encapsulated by the polymeric material of the flexible body.
Claims18
A method for cleaning a coke deposit from an internal surface of a process equipment, the method comprising:
- propelling a flexible pig through the process equipment, wherein the flexible pig is propelled by a fluid comprising an aqueous solution;
- and
- removing at least a portion of the coke deposit from the internal surface using the flexible pig, without damaging a metal protective layer of the internal surface of the process equipment,
- wherein the flexible pig comprises:
- at least two foam spacers,
- at least two bristle sections, and
- a flexible cable extending along a longitudinal axis of the flexible pig through the at least two foam spacers and through the at least two bristle sections,
- wherein each of the at least two bristle sections comprises a plurality of bristles, and wherein the at least two bristle sections are separated by one of the at least two foam spacers.
A flexible pig for cleaning a coke deposit from an internal surface of a process equipment, the flexible pig comprising:
- the flexible pig comprises:
- at least two foam spacers,
- at least two bristle sections, and
- a flexible cable extending along a longitudinal axis of the flexible pig through the at least two foam spacers and through the at least two bristle sections,
- wherein each of the at least two bristle sections comprises a plurality of bristles, and wherein the at least two bristle sections are separated by one of the at least two foam spacers.
Dependencies are inferred from the claim text.