METHOD OF OPERATING AN ELECTRICAL HEATING ARRANGEMENT

A method of operating an electrical heating arrangement of considerable length using a heating line having at least one heating conductor surrounded by an insulation resistant to high temperatures. A metal tube (4) abutting against the insulation (3) is formed around the heating line (1) and the hea...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	ZIEMEK, GERHARD
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A method of operating an electrical heating arrangement of considerable length using a heating line having at least one heating conductor surrounded by an insulation resistant to high temperatures. A metal tube (4) abutting against the insulation (3) is formed around the heating line (1) and the heating line (1), which is equipped with the metal tube (4) is inserted into a metallic tube (5) which has a diameter larger than the metal tube (4) and encloses, in addition to the heating line (1), an axially continuous clearan ce space (6). A non-combustible gas having a lower kinematic viscosity compared with air is inserted into the clearance space (6), said gas completely filling the latter and being kept permanently under pressure.