Downhole subsurface safety valve device

United States of America Patent

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Apr 13, 2004
Grant Date
Jul 4, 2002
app pub date
Dec 7, 2001
filing date
Dec 7, 2000

priority date (Note)
Expired

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Abstract

A downhole subsurface safety valve device, where an actuator is mounted on the outside of the well on the Christmas tree and the valve is operated by a mechanical transmission which may be linear (an hydraulic actuator) or rotary (an electric motor).

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Patent Owner(s)

FMC KONGSBERG SUBSEA AS

International Classification(s)

E21B:EARTH OR ROCK DRILLING

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[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Johansen, John A	Kongsberg, NO	16	410

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Downhole subsurface safety valve device

Number of patents in Portfolio can not be more than 2000

United States of America Patent

10004863

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PATENT NO	6719057
APP PUB NO	20020084075A1
SERIAL NO	10004863
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity Expired	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
April 13, 2004	US,6719057,B2 US6719057B2	GRANTED PATENT AS SECOND PUBLICATION
July 04, 2002	US,20020084075,A1 US20020084075A1	FIRST PUBLISHED PATENT APPLICATION

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10004863

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