Method for thermally protecting subsea installations, and apparatus for implementing such thermal protection

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United States of America Patent

PATENT NO 6889770
APP PUB NO 20030010499A1
SERIAL NO

10203498

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Method for protecting subsea installations against cooling which leads to hydrate formation, in particular during production halts. This is achieved by thermally isolating portions of the installation (1) against the surrounding water (2), and particularly by completely encompassing the subsea installation (1) by means of a cap (3) which seals against the surrounding water (2). The cap (3) comprises several elements of which each separately can be exposed to cooling and internal hydrate formation. The invention also comprises a thermally isolating apparatus, adapted for protecting subsea installations (1) against cooling, which involves a risk for hydrate formation. An apparatus (3, 9) for implementing the method comprises a relatively tight-fitting cap (3) which encompasses at least two of the elements to be protected from cooling. Thus, the water inside the cap (3) is kept separately from the surrounding water (2) and evenly distribute the heat energy present under the cap (3) to all the elements encompassed by the cap.

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Patent Owner(s)

Patent OwnerAddress
VETCO GRAY SCANDANAVIA ASP O BOX 83 N-1375 BILLINGSTAD

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Augilera, Patrice Hvalstad, NO 1 15
Hestetun, Steinar Asker, NO 5 35
Qvam, Helge Andreas Oslo, NO 1 23

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