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A cathodic protection system for areas without electrical insulation

A cathodic protection and electrical insulation technology, applied in the field of corrosion and technical protection, can solve problems such as difficulty in implementing cathodic protection measures

Active Publication Date: 2018-06-26
TIANJIN LONGSHUN TECH SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, many oil and water wells are in continuous production and are not allowed to stop production at will, which makes it difficult to implement cathodic protection measures in oil and water well pipelines

Method used

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  • A cathodic protection system for areas without electrical insulation
  • A cathodic protection system for areas without electrical insulation
  • A cathodic protection system for areas without electrical insulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] During operation, the cathode current source 14 generates a cathode current, which can extend along the surface of the buried pipeline 4 to keep the buried pipeline 4 at a low potential. The power breaking point 9 is set at both ends of the buried pipeline 4. The power breaking point 9 is connected to the input end of the clamp potential protection circuit 6, and the output end of the clamp potential protection circuit 6 is connected to the input of the high negative potential electrode Terminal, when the protection potential of the cathode current in the buried pipeline is positive than -0.86V, the clamp potential protection circuit is positively conducted, and the electrons in the high negative potential electrode flow to the power failure point; when the cathode current is in the buried pipeline When the protection potential of the pipeline 4 is negative than -0.86V, the clamp potential protection circuit is reversely conducted, and the cathode current in the buried pi...

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PUM

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Abstract

The invention provides a cathode protection system for a powerless insulation region and relates to the field of corrosion and technical protection. The cathode protection system comprises a cathode current source, power feeding and supplementing points arranged on a buried pipeline, a clamp potential protective circuit and high negative potential electrodes. The cathode current source is used for generating cathode current which can extend along the surface of the buried pipeline, so that the low potential of the buried pipeline is kept. The power feeding and supplementing points are arranged at the two ends of the buried pipeline and connected with the input end of the clamp potential protective circuit. The output end of the clamp potential protective circuit is connected with the input ends of the high negative potential electrodes. By the adoption of the cathode protection system, cathode protection of the buried pipeline can be achieved without additional arrangement of an electric insulation device.

Description

Technical field [0001] The invention relates to the field of corrosion and technical protection, in particular to a cathodic protection system for areas without electrical insulation. Background technique [0002] The impressed current cathodic protection technology is an electrochemical protection device that applies external current to the surface of the metal pipe to make the protected metal pipe the cathode, thereby inhibiting the electron migration on the surface of the metal pipe and reducing the occurrence of corrosion. [0003] At present, externally applied cathodic protection is the most economical and effective device for the anti-corrosion protection of buried metal pipelines. For specific application methods, see figure 1 , It is composed of power source, deep well anode, reference electrode, energizing point, which is zero-connection cathode, and in application, electrical insulation devices must be installed at both ends of the metal pipeline. When in use, when the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F13/20C23F13/22
CPCC23F13/20C23F13/22C23F2213/32
Inventor 解长友王子龙
Owner TIANJIN LONGSHUN TECH SERVICE CO LTD