Drillable bridge plug

Details Drillable bridge plug Drillable bridge plug

2007-12-31

2010-10-12

Bagnell, David J (Department: 3672)

Wells

Packers or plugs

With expanding anchor

C166S192000

Reexamination Certificate

active

07810558

ABSTRACT:
A downhole tool for isolating zones in a well includes a mandrel, a sealing element disposed around the mandrel, an upper cone disposed around the mandrel proximate an upper end of the sealing element, an upper slip assembly disposed around the mandrel adjacent a sloped surface of the upper cone, a lower cone disposed around the mandrel proximate a lower end of the sealing element, a lower slip assembly disposed around the mandrel adjacent a sloped surface of the lower cone, and two element end rings. The two element end rings include a first element end ring disposed adjacent the upper end of the sealing element and a second element end ring disposed adjacent the lower end of the sealing element. The downhole tool includes two element barrier assemblies; each assembly disposed adjacent one of the two element end rings.

REFERENCES:
patent: 3910348 (1975-10-01), Pitts
patent: 5701959 (1997-12-01), Hushbeck et al.
patent: 6491108 (2002-12-01), Slup et al.
patent: 6695050 (2004-02-01), Winslow et al.
patent: 2004/0251025 (2004-12-01), Giroux et al.
U.S. Office Action for related U.S. Appl. No. 12/198,859, dated Dec. 17, 2008, (5 pages).
U.S. Office Action for correspoding U.S. Appl. No. 11/064,306 with Notice of References cited dated Jan. 25, 2008, (7 pages).

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