Heating cable for extraction pipes of viscous hydrocarbons or paraffinic in conventional wells and type tight wells, vertical or directional, with flooded annular in casual or permanent form, suitable for use between low and high fluid pressures ranges

Abstract

A heating cable for an extraction pipe of viscous hydrocarbon or paraffinic in a well, the heating cable including a sleeve made of a flexible material, the sleeve has a perimeter, an internal cavity, and a continuous homogeneous length, the sleeve is free of perforations; electrically conductive conductors placed inside the sleeve, the electrically conductive conductors are parallel to each other and separate from each other by a space; a primary insulation layer independently wrapping each one of the electrically conductive conductors; a layer including of a single fluoropolymer material completely filling up the entire cavity of the sleeve and forming a solid structure that encases the electrically conductive conductors, the primary insulation layer, the entire space between the electrically conductive conductors, and the entire perimeter of the sleeve; a metallic shield surrounding the layer consisting of the single monolithic fluoropolymer material, the metallic shield has a shape of a ribbon; the heating cable is flat.

1 . A heating cable for an extraction pipe of viscous hydrocarbon or paraffinic in a well, the heating cable comprising:
 a sleeve made of a flexible material, the sleeve has a perimeter, an internal cavity, and a continuous homogeneous length, the sleeve is free of perforations;   electrically conductive conductors placed inside the sleeve, the electrically conductive conductors are parallel to each other and separate from each other by a space;   a primary insulation layer independently wrapping each one of the electrically conductive conductors;   a layer consisting of a single fluoropolymer material completely filling up the entire cavity of the sleeve and forming a solid structure that encases the electrically conductive conductors, the primary insulation layer, the entire space between the electrically conductive conductors, and the entire perimeter of the sleeve;   a metallic shield surrounding the layer consisting of the single fluoropolymer material, the metallic shield has a shape of a ribbon;   wherein the heating cable is flat.   
     
     
         2 . The heating cable comprising:
 a flexible sleeve; and   a solid core placed inside the flexible sleeve;   wherein the solid core includes solid layer consisting of a single fluoropolymer material and encasing a plurality of electrically conductive conductors that are individually wrapped with a primary insulation layer and a metallic shield surrounding the layer consisting of the single monolithic fluoropolymer material;   wherein the electrically conductive conductors are parallel to each other and separate from each other by a space.   
     
     
         3 . A heating cable for an extraction pipe of viscous hydrocarbon or paraffinic in a well, the heating cable comprising:
 a thermo conductive conduit; and   a heating cable including: a sleeve made of a flexible material, the sleeve has a perimeter, an internal cavity, and a continuous homogeneous length, the sleeve is free of perforations; electrically conductive conductors placed inside the sleeve, the electrically conductive conductors are parallel to each other and separate from each other by a space, a primary insulation layer independently wrapping each one of the electrically conductive conductors, a layer consisting of a single fluoropolymer material completely filling up the entire cavity of the sleeve and forming a solid structure that encases the electrically conductive conductors, the primary insulation layer, the entire space between the electrically conductive conductors, and the entire perimeter of the sleeve, a metallic shield surrounding the layer consisting of the single fluoropolymer material, the metallic shield has a shape of a ribbon, wherein the heating cable is flat;   wherein the flat cable passes through the thermo conductive conduit;   wherein the thermo conductive conduit secured to a rod located inside an extraction pipe;   wherein the rod and the thermo conductive conduit are not in contact with inner walls of the extraction pipe, but in direct contact with the fluid transported inside the extraction pipe.