05182792 is referenced by 237 patents and cites 13 patents.

A process to clear pipelines carrying fluids viscous and/or rich in organic residues includes the introduction of a heating element inside a pipeline carrying the fluids through a coupling spool which is intercalated in the fluid-carrying pipeline. Simultaneously an electric current is applied to the heating element so that the heat generated by the heating element is transmitted to the viscous fluid or to the compacted residual mass inside the fluid-carrying pipeline, causing the detachment of those residues from the internal wall of the pipeline and re-establishing the conditions for fluid flow.

Title
Process of electric pipeline heating utilizing heating elements inserted in pipelines
Application Number
7/750995
Publication Number
5182792
Application Date
August 28, 1991
Publication Date
January 26, 1993
Inventor
Carlos Alberto D C Goncalves
Rio de Janeiro
BR
Agent
Sughrue Mion Zinn Macpeak & Seas
Assignee
Petroleo Brasileiro Petrobras
BR
IPC
E21B 7/15
F24D 15/02
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