High-current carrying capacity cable for marine engineering drilling rigs

Abstract

The present invention relates to a high-current carrying capacity cable for marine engineering drilling rigs. The cable comprises three insulated wire cores and three grounding wire cores; the three insulated cores and the three grounding wire cores are twisted together so as to form a cable core; each of the insulated wire cores is composed of a conductor as well as an insulated layer and an isolation layer which are arranged outside the conductor; each of the grounding wire cores is composed of a grounding wire conductor and an insulated layer wrapping the grounding wire conductor; the outer surface of the cable core is provided with a heat insulating buffer layer, a metal wire shielding layer and a metal belt shielding layer sequentially; and the outermost layer of the cable is provided with a reinforced outer jacket. The cable of the invention has the advantages of reasonable structure, high temperature resistance, high humidity resistance, oil pollution resistance, vibration resistance, ultraviolet ray resistance, good bending performance, non-toxic performance and environmental friendless.

Description

technical field [0001] The invention relates to a cable, in particular to a high-capacity cable for an ocean engineering drilling tower. Background technique [0002] With the rapid development of the national economy, the dependence on petroleum and natural electricity as the main form of resources and energy is becoming more and more serious, which can be described as huge consumption. In order to achieve the overall requirements of sustainable development strategies and environmental protection, countries are actively seeking mining methods Breakthroughs and new clean alternative energy sources, but at present increasing the development of offshore oil and gas is still the main direction. , the output value of my country's marine engineering equipment industry will reach a scale of more than 100 billion yuan. Statistics show that in the past 10 years, 60% of the world's newly discovered large oil and gas fields have come from the ocean. It is estimated that by 2020, offsho...

AI Technical Summary

Problems solved by technology

Statistics show that in the past 10 years, 60% of the world's newly discovered large oil and gas fields have come from the ocean. It is estimated that by 2020, offshore oil will account for 35% of global oil extraction, and offshore natural gas will account for 41%. Accounting for less than 1 / 5 of the total oil extraction, the potential for improvement is huge

[0004] Existing cross-linked polyethylene insulated power cables composed of conductors, polyethylene insulation and sheaths, although the flame retardant performance at room temperature can meet the requirements of the Class A bunching flame retardant test specified in IEC60332, but in high temperature and oil and gas operations The environment is also difficult to maintain its Class A flame retardant performance. The long-term high ambient temperature affects the comprehensive oxygen index of the entire cable under normal working conditions. The temperature rise of the cable will also increase under the flow rate. Once it is ignited, it will also accelerate the combustion and eventually cause the cable to be completely burned. At the same time, the conductor junction structure and shielding structure of the existing products are not conducive to cable bending. Under high temperature, it cannot maintain good thermal stability, oil resistance and chemical resistance

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