Multiconductor electrical cable

H - Electricity – 01 – B

Patent

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Details

H01B 7/28 (2006.01) E21B 41/00 (2006.01) H01B 13/22 (2006.01)

Patent

CA 2241578

A multiconductor electrical cable for use in a subterranean wellbore includes at least one electrical conductor surrounded by one or more layers of insulating material, such as EPDM. A fluid barrier, such as an extruded layer of lead or a lead alloy, surrounds the insulating material. To protect the fluid barrier from damage during the subsequent armoring process, a non-braided material is applied, as an extrusion or a tape. The non-braided material can be applied immediately after the fluid barrier is applied, not as a separate process, thereby reducing the risk of damage to the fragile fluid barrier, and at a cost less than the braided materials used in the past.

Câble multiconducteur électrique utilisé dans un puits souterrain. Il comprend au moins un conducteur électrique entouré d'une ou de plusieurs couches de matériau isolant, comme l'EPDM. Une barrière contre les fluides, comme une couche extrudée de plomb ou d'alliage de plomb, entoure le matériau isolant. Pour protéger la barrière d'arrêt des fluides contre des dégats pendant la mise en place subséquente de l'armure, un matériau non tressé est appliqué, sous forme d'extrusion ou de ruban. Le matériau non tressé peut être appliqué immédiatement après l'application de la barrière d'arrêt des fluides, et non lors d'une opération distincte, ce qui permet de diminuer le risque d'endommager la barrière contre les fluides, et ce, à un coût inférieur que celui des matériaux tressés utilisés par le passé.

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