Heated offshore pipeline and method of manufacturing

A pipeline and pipe technology, which is applied to heated submarine pipelines and their manufacturing fields, can solve problems such as the consumption of steel windings or ground electrodes, and achieve the effect of reducing the amount of steel used.
CN1120918CInactive Publication Date: 2003-09-10格伦·R·萨姆纳
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
格伦·R·萨姆纳
Publication Date
2003-09-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

A submerged marine pipeline (201) is electrically insulated from sea water and is heated by alternating current that flows through the pipeline, where the AC power supply (212) is grounded to ambient sea water (206). The insulating material is cast between an assembled length of a pipeline or bundle of pipelines and molds that are continuous, or directly to one another along and around the assembled length, before it has been placed at its final destination.
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Description

technical field

[0001] The present invention relates to pipelines electrically heated by an alternating current and a method of insulating submarine pipelines through which an alternating current flows through conductive pipelines insulated from sea water with a waterproof coating, and in particular to a method of applying heat insulating material after the pipes have been welded together, Therefore, various troubles caused when laying pipelines in deep sea are avoided. Background technique

[0002] "Subsea" or "offset" production techniques are increasingly being used in the production of offshore oil and gas from subsea reservoirs. The technology uses subsea pipelines called "pipelines" that run on shorter routes between wellheads on the sea floor and oil gathering stations like nearby platforms. For various reasons, it is often beneficial or necessary to take measures to maintain the high temperature of the fluid flowing in the subsea pipeline. One way of doing this is t...

Claims

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