Intermediate-voltage power cable for slurry-resistant petrolatum oil platform and manufacturing method of power cable

Abstract

The invention discloses an intermediate-voltage power cable for a slurry-resistant petrolatum oil platform and a manufacturing method of the power cable. When a present cable is exposed in a drillingfluid in long time, a common cable sheath material has problems including reduction of the tensile strength, increase of the size and increase of the weight, further use of the common cable is influenced; and in a common intermediate-voltage cable with a circular copper wire compacted copper conductor structure, the conductor tends to oxidize after the cable is used for a period in the marine environment, the contact resistance of the conductor is increased, a filling layer needs to be added in the cable manufacturing process, tight contact treatment is not carried out between a conductor before filling and the internal layer structure, a filling space of the filling layer is relatively large, and relatively more air is left therein, and the oxidation of the conductor is accelerated to certain extent. The cable which can be used to overcome the problems comprises a cable core, an insulated protective layer and an outer layer, the cable core comprises three conductors twisted and molded, and the insulated protective layer comprises a conductor shielding layer, an insulating layer, an insulated shielding layer, a metal shielding layer and a filling strip.

Description

technical field [0001] The invention relates to the field of power transmission cables, in particular to a medium-voltage power cable for mud-resistant oil platforms and a manufacturing method thereof. Background technique [0002] The mud-resistant oil platform medium voltage cable is mainly used to transmit electric energy on the platform. With the increase of large-scale electrical equipment on the platform, the power consumption is getting higher and higher, and the voltage level is getting higher and higher, and the use of corresponding medium-voltage cables is also increasing. The mud-resistant oil platform cables should have low-smoke, halogen-free, resistance Combustibility, UV resistance, seawater corrosion resistance, mud resistance, drilling fluid resistance, small outer diameter, light weight, etc. When the cable is exposed to drilling fluid for a long time, the tensile strength of ordinary cable sheath materials will decrease and the volume will expand. , weigh...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a medium-voltage power cable for mud-resistant oil platforms and its manufacturing method, which can solve the problem of reduced tensile strength and volume loss of ordinary cable sheath materials when existing cables are exposed to drilling fluid for a long time. Problems such as expansion and weight increase affect the continued use of the cable, and the medium-voltage cable conductor generally adopts a copper conductor structure with round copper wire tightly pressed. After a period of time in the offshore environment, the conductor will oxidize and increase the contact of the conductor. Resistance, and the cable needs to add a filling layer during the manufacturing process. Before filling, there is no close contact between the conductor and the inner layer structure, resulting in a large filling space of the filling layer and more air left inside, and the filling Afterwards, the filling layer was not compressed, resulting in incomplete filling, which did not maximize the low-smoke and halogen-free effect of the filling layer, and there was also air remaining inside the cable, which undoubtedly accelerated the oxidation of the conductor to a certain extent.

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