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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
ENVENTURE GLOBAL TECHNOLOGY LLC	15995 NORTH BARKERS LANDING SUITE 350 HOUSTON TX 77079

International Classification(s)

• E21B:EARTH OR ROCK DRILLING

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Brisco, David Paul	Duncan, OK	112	4204
Bullock, Michael	Houston, TX	26	1464
Cook, Robert Lance	Katy, TX	134	4674
Ring, Lev	Houston, TX	188	5787

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
April 27, 2004	US,6725919,B2   US6725919B2	GRANTED PATENT AS SECOND PUBLICATION
May 23, 2002	US,20020060068,A1   US20020060068A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 6725919

Forming a wellbore casing while simultaneously drilling a wellbore

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