Dual-type plug for wellhead

United States of America Patent

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Feb 2, 2010
Grant Date
Apr 5, 2007
app pub date
May 19, 2004
filing date
May 22, 2003

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Abstract

The invention concerns a dual-type plug to be used in a wellhead. The plug has a separate retrievable inner plug (50). Retrieving only the inner plug allows the use of lighter workover equipment than if the whole plug (10) must be pulled.

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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
Følkner, Stein	Hosle, NO	7	20
Lindland, Hans Jørgen	Sandnes, NO	2	21

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Dual-type plug for wellhead

Number of patents in Portfolio can not be more than 2000

United States of America Patent

10557435

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PATENT NO	7654329
APP PUB NO	20070074870A1
SERIAL NO	10557435
DOCKET NO

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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
February 02, 2010	US,7654329,B2 US7654329B2	GRANTED PATENT AS SECOND PUBLICATION
April 05, 2007	US,20070074870,A1 US20070074870A1	FIRST PUBLISHED PATENT APPLICATION

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10557435

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