Oil well sucker rod carbon fiber heating cable and manufacturing method of the cable

Abstract

The invention discloses an oil well sucker rod carbon fiber heating cable and a manufacturing method of the cable. The cable comprises a copper conductor, a conductor insulation layer, a carbon fiber heating layer, a carbon fiber insulation layer and an outer sheath. Ceramic rubber layers are contained in conductor insulation layer and the carbon fiber insulation layer. The carbon fiber heating layer is electrically connected with the copper conductor by multiple inner clamps, and multiple resistors which are mutually connected in parallel are formed. The carbon fiber heating layer is electrically connected with the outer sheath by multiple outer clamps, and parallel loops of the multiple resistors are formed by grounding through adoption of the outer sheath. Each outer clamp is located in the middle position of two adjacent inner clamps. The outer sheath is manufactured by welding and drawing a steel strip along a longitudinal seam. The cable and the method have the advantages that the heating conversion efficiency is high and reaches 98%; the use temperature reaches 600 degrees centigrade; the dampproof and insulation effects are good; the safety performance is high; the strength is high; the service life is long; the manufacturing length reaches more than 2000 meters; welding is carried out without a transverse seam; the tensile property is high; and cable is not liable to rupture.

Description

technical field [0001] The invention relates to a heating cable, in particular to an oil well sucker rod carbon fiber heating cable and a manufacturing method thereof. Background technique [0002] Oil well sucker rod heating cables are used in oil production, especially in the process of heavy oil production. Because the underground crude oil contains a large amount of paraffin and asphalt, as the crude oil sucker rod is slowly lifted, the temperature of the crude oil close to the surface layer will drop correspondingly, and the phenomenon of crude oil condensation will occur, and the crude oil flow rate of the oil well will also decrease accordingly and production will be shut down. In order to increase crude oil production, it is necessary to install a heating cable in the sucker rod of the oil well to increase the temperature of crude oil to achieve temperature compensation, thereby improving the flow performance of crude oil. [0003] As early as the 1970s, my country ...

AI Technical Summary

Problems solved by technology

When the heating cable is working, the copper conductor is heated by increasing the current, and the heat is transferred to the sucker rod through the steel pipe sheath. Not only the electrothermal conversion efficiency is low, but the power consumption is large. Oil temperature, and there are problems such as cable laying is easy to break, insulation wrapping is not moisture-proof and easy to break down, etc.

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