Three-phase heating cable

Abstract

The invention relates to the technical field of three-phase heating cables, in particular to a three-phase heating cable which comprises a copper conductor. The outer wall of the copper conductor is coated with a sintering layer, the outer wall of the sintering layer is provided with a wrapping layer, the outer wall of the wrapping layer is coated with an armor layer, and the outer wall of the armor layer is coated with a high-temperature-resistant insulating rubber sleeve. The number of the copper conductors is not less than three, the diameter of each copper conductor is 5.19 mm, the sintering layer is a polyimide sintering layer, the thickness of the sintering layer is 0.6 mm, the wrapping layer is a glass fiber wrapping layer, the thickness of the wrapping layer is 2 mm, the armor layer is a plating-layer-free steel belt, and the thickness of the armor layer is 0.5 mm. Compared with an existing heating cable, the three-phase heating cable has the advantages of being high in heatingefficiency, resistant to high temperature, waterproof and resistant to abrasion.

Description

technical field [0001] The invention relates to the technical field of three-phase heating cables, in particular to a three-phase heating cable. Background technique [0002] Current heating cables generally use two-phase electric heating, or use high-resistance materials for heating, and another way is to use intermediate frequency heating and use high-resistance materials for heating. The cost of resistance materials is high, and the load-bearing through resistance materials is low. Large length heating is required, and in the oil field, coiled tubing tooling needs to be used to go down well, which is difficult to operate and high in operating costs, while the heating efficiency of intermediate frequency heating is low, and the circuit required is complex. Contents of the invention [0003] The purpose of the present invention is to solve the shortcomings in the prior art, and propose a three-phase heating cable and its forming process. [0004] In order to achieve the ...

AI Technical Summary

Problems solved by technology

[0002] Current heating cables generally use two-phase electric heating, or use high-resistance materials for heating, and another method is to use intermediate frequency heating and use high-resistance materials for heating. The cost of resistance materials is high, and the resistance materials are used for load bearing. Large-length heating is required, and in the oil field, it is necessary to cooperate with coiled tubing tooling to go down well. The operation is difficult and the operation cost is high. However, the heating efficiency of intermediate frequency heating is low, and the circuit required is complicated.

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