Wells – Valves – closures or changeable restrictors – Longitudinally movable operator
Reexamination Certificate
2007-02-20
2007-02-20
Thompson, Kenneth (Department: 3672)
Wells
Valves, closures or changeable restrictors
Longitudinally movable operator
C166S386000, C166S373000, C166S317000
Reexamination Certificate
active
10366593
ABSTRACT:
A subsurface safety valve assembly for controlling fluid flow in a wellbore. In one embodiment, the subsurface safety valve assembly includes a tubular member having a longitudinal bore extending therethrough, a flapper removably connected to the tubular member. The flapper is configured to pivot against the tubular member between an open position and a closed position. The subsurface safety valve assembly further includes a flow tube disposed inside the tubular member and a shear sleeve having an upper end and a lower end. The upper end of the shear sleeve is positioned against a lower end of the flow tube to form a first seal between the upper end of the shear sleeve and the lower end of the flow tube.
REFERENCES:
patent: 2998077 (1961-08-01), Keithahn
patent: 3749119 (1973-07-01), Tausch et al.
patent: 3763932 (1973-10-01), Dinning
patent: 4077473 (1978-03-01), Watkins
patent: 4160484 (1979-07-01), Watkins
patent: 4420041 (1983-12-01), Patel
patent: 4597445 (1986-07-01), Knox
patent: 4605070 (1986-08-01), Morris
patent: 4651827 (1987-03-01), Helderle et al.
patent: 4846281 (1989-07-01), Clary et al.
patent: 4890674 (1990-01-01), Le
patent: 5125457 (1992-06-01), Meaders
patent: 5145005 (1992-09-01), Dollison
patent: 5167284 (1992-12-01), Leismer
patent: 5249630 (1993-10-01), Meaders et al.
patent: 5343955 (1994-09-01), Williams
patent: 5358053 (1994-10-01), Akkerman
patent: 6263910 (2001-07-01), Davis et al.
patent: 2002/0000317 (2002-01-01), Rayssigular et al.
patent: 2213181 (1989-08-01), None
patent: WO 99/14461 (1999-03-01), None
patent: WO 2004/022906 (2004-03-01), None
U.K. Search Report, Application No. GB0403024.3, dated May 28, 2004.
U.K. Search Report, Application No. GB0403024.3, dated Oct. 5, 2004.
Anderson Robert J.
Hanton John
Smith Roddie R.
Wagner Nathaniel H.
Patterson & Sheridan LLP
Thompson Kenneth
Weatherford / Lamb, Inc.
LandOfFree
Subsurface safety valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Subsurface safety valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Subsurface safety valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3839437