Method and device by a displacement tool

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United States of America Patent

PATENT NO 7389818
APP PUB NO 20060201680A1
SERIAL NO

10525261

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Abstract

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A method and device for use in the replacing of liquid in a riser (12) of the kind used in the recovery of petroleum offshore, wherein the riser (12) forms a connection between a wellhead (4) on or above the sea floor (6) and a drilling vessel (1), and wherein a body (30), which is arranged to keep the liquids separate, is displaced longitudinally of the riser (12).

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hoiland, Oddgeir Stavanger, NO 1 10

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