Internal blow out preventer

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United States of America Patent

PATENT NO 9422785
APP PUB NO 20150108377A1
SERIAL NO

14580342

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Importance

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Abstract

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An internal blow out preventer for use in a drill string, comprising a housing having an outer valve closure element and where the outer valve closure element is configured to be moved between an open and a closed position, wherein the outer valve closure element is provided with an inner valve closure element that is configured to be moved between an open and a closed position inside the outer valve closure element.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
GRANT PRIDECO INC10353 RICHMOND AVENUE HOUSTON TX 77042

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kukielka, Slawomir Kristiansand, NO 4 14

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