Electrically isolating insulated conductor heater

Details Electrically isolating insulated conductor heater Electrically isolating insulated conductor heater

E - Fixed Constructions

21

B

E21B 36/04 (2006.01) E21B 36/00 (2006.01) E21B 43/24 (2006.01)

Patent

CA 2684485

A heating system for a subsurface formation includes an electrical conductor and an insulation layer at least partially surrounding the electrical conductor. A jacket that includes ferromagnetic material at least partially surrounds the insulation layer. The outside surface of the jacket is configured to be at little or no electric potential while the electrical conductor is conducting electricity and while the jacket is at temperatures below the Curie temperature of the ferromagnetic material.

La présente invention concerne un système de chauffage pour une formation de subsurface qui comprend un conducteur électrique et une couche d'isolation qui entoure au moins partiellement le conducteur électrique. Une chemise qui comprend un matériau ferromagnétique entoure au moins partiellement la couche d'isolation. La surface extérieure de la chemise est configurée pour être à un potentiel électrique faible ou nul lorsque le conducteur électrique conduit de l'électricité et lorsque la chemise est à des températures inférieures à la température de Curie du matériau ferromagnétique.

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