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

Patent Owner(s)

Patent Owner	Address
BJ SERVICES COMPANY U S A	HOUSTON TX 77041

International Classification(s)

• E21B:EARTH OR ROCK DRILLING

• 2009 Application Filing Year
• E21B Class
• 2047 Applications Filed
• 1662 Patents Issued To-Date
• 81.20 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Bolding, Jeffrey L	Kilgore, US	20	476
# of filed Patents : 20 Total Citations : 476
Smith, David Randolph	Kilgore, US	37	795
# of filed Patents : 37 Total Citations : 795

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Patent Citation Ranking

• 31 Citation Count
• E21B Class

• 79.12 % this patent is cited more than
• 14 Age

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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
February 15, 2011	US,7886830,B2   US7886830B2	GRANTED PATENT AS SECOND PUBLICATION
April 22, 2010	US,20100096145,A1   US20100096145A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 7886830

Downhole safety valve apparatus and method

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Abstract

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The application discloses a safety valve to replace an existing safety valve in order to isolate a production zone from a string of tubing when closed. Preferably, the safety valve includes a flow interruption device displaced by an operating conduit extending from a surface location to the safety valve through the inside of the production tubing. The application also discloses a bypass-conduit which allows communication from a surface location to the production zone through the safety valve without affecting the operation of the safety valve.

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Description

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Claims

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Claims data not available

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Legal Events

 

• MAFP2022
• MAFP2018
• FPAY2014
• I2011
• STCF2011
• P2010
• F2009
• PD2004

Date	Code	Event	Description
Jul 20, 2022	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 12
Aug 02, 2018	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552) year of fee payment: 8
Jul 16, 2014	FPAY	FEE PAYMENT	year of fee payment: 4
Feb 15, 2011	I	Issuance
Jan 26, 2011	STCF	INFORMATION ON STATUS: PATENT GRANT	free format text: PATENTED CASE
Apr 22, 2010	P	Published
Dec 23, 2009	F	Filing
Oct 07, 2004	PD	Priority Date