Downhole flapper circulation tool

Details Downhole flapper circulation tool Downhole flapper circulation tool

2005-06-01

2008-10-14

Neuder, William P (Department: 3672)

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

C166S332800, C166S386000

Reexamination Certificate

active

07434625

ABSTRACT:
The circulation tool10for use downhole in a well includes a housing22having one or more bypass ports52for circulation between a bore33in the housing and an annulus surrounding the housing. Sleeve50is axially movable within the housing, and axially spaced seals36, 56seal between the sleeve and the housing when the sleeve is in the closed position. A flapper84is pivotally mounted to the sleeve, and includes a seat about a central bore85in the flapper for engagement with the plug. A stop40prevents pivoting of the flapper to an open position until the sleeve has moved axially and the seals seal between the sleeve and the housing.

REFERENCES:
patent: 3376935 (1968-04-01), Baker
patent: 4582140 (1986-04-01), Barrington
patent: 4657092 (1987-04-01), Franks, Jr.
patent: 4987841 (1991-01-01), Rawson et al.
patent: 5176208 (1993-01-01), Lalande et al.
patent: 5335731 (1994-08-01), Riggenberg et al.
patent: 5402850 (1995-04-01), Lalande et al.
patent: 5960881 (1999-10-01), Allamon et al.
patent: 6275929 (2001-08-01), Blum et al.
patent: 6491103 (2002-12-01), Allamon et al.
patent: 6508309 (2003-01-01), French
patent: 6834726 (2004-12-01), Giroux et al.
patent: 6920930 (2005-07-01), Allamon et al.
patent: 7063156 (2006-06-01), Patel et al.
patent: 2006/0011354 (2006-01-01), Logiudice et al.

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