Impressed current cathodic protection method for tension leg platform

Abstract

A cathodic protection method with applied current for a tension leg platform, which is provided with a DC power supply, an auxiliary anode string, a reference electrode and a connecting cable, the negative pole of the DC power supply is connected to the upper part of the platform through a cathode cable, and the positive pole is connected to the auxiliary anode string through an anode cable Connection, the DC power supply is provided with a reference electrode terminal, the DC power supply is connected to the reference electrode through the electrode terminal, and the reference electrode is installed and fixed on the tension leg platform and immersed in seawater. The invention can effectively protect the tension leg platform and prevent seawater from corroding the tension leg platform, and is especially suitable for a large tension leg platform; moreover, it is easy to install, has a long protection life and strong reliability.

Description

technical field [0001] The invention relates to a platform protection method, in particular to an applied current cathodic protection method suitable for a tension leg platform. It belongs to the field of marine engineering technology. Background technique [0002] As the development of oceans is increasingly advancing to the deep sea, the development of oil and gas resources is also continuously entering the deep sea. In general, the natural environment in the deep sea is very harsh, and the environmental load is relatively complex. The requirements for theoretical analysis, design and installation of marine engineering facilities are more stringent and precise. Compliant platform has been widely developed and applied because of its special structural form, low engineering cost and good structural safety. The tension leg platform is a typical compliant platform structure. The main body of the tension leg platform mainly includes: platform upper body, columns (including cr...

AI Technical Summary

Problems solved by technology

However, the existing sacrificial anode cathodic protection method consumes a large amount of aluminum alloy material, which increases the load of the tension leg platform

Also, as the anodes are consumed, the platform load changes, increasing platform instability

[0005] With the gradual deepening of the sea area and the increasingly complex structure of TLPs, the cost of large TLPs has increased significantly. If the existing sacrificial anode cathodic protection is used on large TLPs, there will be a large number of aluminum alloys It is wasted in vain, and, due to the excessive use of sacrificial anodes, the increase in the load of the large TLP will also affect the stability of the large TLP and increase the design strength of the TLP

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