Replaceable cp anodes

A technology of anode and cathodic protection, applied in wellbore/well parts, earthwork drilling and production, etc., can solve problems such as difficulty in assembling anodes, and achieve the effect of simplifying operations

Inactive Publication Date: 2012-09-19
VETCO GRAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach can cause the tree to be densely packed, and so fitting into many anodes can be difficult, and can also result in anodes having to be placed closer to vulnerable areas than desired

Method used

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  • Replaceable cp anodes
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  • Replaceable cp anodes

Examples

Experimental program
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Embodiment Construction

[0030] exist figure 2 A first embodiment of the invention is schematically shown in . Here, an anode 3 according to an embodiment of the invention is shown just prior to deployment at a well tree 4 . Anode 3 is designed to be handled by an ROV, but for clarity the ROV is not shown.

[0031] The anode 3 comprises an elongated support body 10 supporting and holding the mass of sacrificial material 5 . As shown, the sacrificial material 5 is molded circumferentially around the support body 10 . Material 5 may for example comprise a material selected from the group consisting of aluminum, zinc and magnesium, although other materials may be used.

[0032] One end of the support body 10 comprises a part formed as a tapered protrusion 6 . This is shaped so as to enable a frictional engagement with the well tree 4 which causes the anode 3 to be retained at the tree in use. More specifically, the protrusion 6 is tapered for insertion (“piercing”) and retention in a substantially ...

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PUM

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Abstract

An anode (3) for cathodic protection of underwater-located equipment, comprises: a support body (10); sacrificial material (5) retained by the support body; and attachment means for releasably attaching the anode to the equipment.

Description

technical field [0001] The present invention relates to an anode for cathodic protection of submerged equipment and a method for providing corrosion protection of submerged equipment. Suitable subsea equipment may include well trees for, for example, subsea hydrocarbon fluid extraction facilities. Background technique [0002] As is well known, metallic equipment to be deployed underwater is at risk of corrosion. To protect the equipment, electrical anodes (also known as "sacrificial anodes") are typically provided near the equipment, thereby providing cathodic protection (CP) to the equipment. Such an anode comprises a sacrificial metallic material having a more negative electrochemical potential than the arming metal such that when deployed, the sacrificial material of the anode corrodes more readily than the arming metal. Currently, the most common metallic materials used as sacrificial materials for electrical anodes include alloys of aluminium, magnesium and zinc, whi...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C23F13/18C23F13/10
CPCC23F2213/31E21B41/02C23F13/18
InventorR·贝尔
OwnerVETCO GRAY