Heating of subsea pipelines
Number of patents in Portfolio can not be more than 2000
United States of America
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Aug 20, 2024
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app pub date -
Dec 3, 2019
filing date -
Dec 3, 2019
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Abstract
A technique mitigates or removes a plug of solid-state material such as wax or hydrate coalesced from hydrocarbon fluids in a subsea flowline pipe. In a normal flow mode, a flow of hot production fluids directed from a subsea well into a production flowline pipe extending toward a processing or storage location. Simultaneously, a contra-flow of service fluid such as monoethylene glycol (MEG) is transported along a service fluid pipe extending along and adjacent the production flowline pipe. The service fluid is injected into the well or flow of production fluid upstream of the flowline pipe. On determining plugging or a risk of plugging of the flowline pipe, a heating mode is activated wherein at least some of the flow of the production fluid is diverted into the service fluid pipe. This heats the service fluid pipe which, in turn, heats the flowline pipe to disperse the solid-state material.
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