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1. (WO2017189648) CLEANING COKE DEPOSITS FROM PROCESS EQUIPMENT

Pub. No.:    WO/2017/189648    International Application No.:    PCT/US2017/029514
Publication Date: Fri Nov 03 00:59:59 CET 2017 International Filing Date: Thu Apr 27 01:59:59 CEST 2017
IPC: B08B 9/055
C10G 75/00
F28G 1/12
Applicants: CHEVRON PHILLIPS CHEMICAL COMPANY LP
Inventors: MCGAHEE, Vincent dePaul
Title: CLEANING COKE DEPOSITS FROM PROCESS EQUIPMENT
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 (100) 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 (110) formed of a polymeric material (130), and a plurality of bristles (120) partially encapsulated by the polymeric material of the flexible body.