Cathode cable structure for impressed current cathodic protection device of thermal production well

Abstract

The invention relates to a cathode cable structure for an impressed current cathode protection device of a thermal production well, which comprises a stainless steel connecting section, the first end of the stainless steel connecting section can be fixedly connected to a sleeve, and the second end of the stainless steel connecting section is electrically connected with an impressed current cathode cable; a first rubber sleeve is detachably arranged on the stainless steel connecting section from the first end to the inside in a sleeving manner, and the first rubber sleeve is arranged in a high-temperature-resistant manner; the stainless steel connecting section is sleeved with a second rubber sleeve inwards from the second end, and the second rubber sleeve is oil-water resistant. The adjacent ends of the second rubber sleeve and the first rubber sleeve are arranged in an abutting mode, and the adjacent ends of the first rubber sleeve and the second rubber sleeve are in waterproof connection. A conventional cable copper core or aluminum core is replaced by the stainless steel connecting section, and the stainless steel connecting section is sleeved with the rubber sleeve for protection, so that corrosion protection can be performed on buried pipelines for oil transportation, water transportation and the like, and potential safety hazards are eliminated.

Description

Technical field [0001] The present invention relates to the field of oil production engineering, and more particularly to a cathode cable structure for thermal well-electrodeployed current cathode protection devices. Background technique [0002] At present, due to the introduction of oilfield development and production, the increasingness of the underground and ground collection pipe column corrosion is caused by the increasingness of the underground and the ground-to-hole, which causes environmental safety problems. Applying techniques for using external current cathode protection can electrochemically protect the outer surface of the downhole and the ground pipe column, one of the links in the cathode protection technology is the connection of the cathode cable and the casing, and the DC current from the power supply is overflowed to the earth. Discharge, current flows through the cathode cable to the power source through the buried line. The field cathode cable is directly we...

AI Technical Summary

Problems solved by technology

On-site cathode cables are directly welded to the outer surface of the casing. The development method of some oilfield blocks is thermal recovery. The maximum surface temperature of some casings is about 190°C. The insulation layer of the cathode cable cannot withstand such a high temperature, causing the insulation layer to age And the copper core or aluminum core is corroded by high temperature oxygen. After a period of time, the virtual connection between the cable and the bushing will generate sparks, causing safety hazards

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