Downhole valve assembly

Wells – Processes – Destroying or dissolving well part

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C166S317000

Reexamination Certificate

active

07806189

ABSTRACT:
Downhole tools and methods for isolating a wellbore. A downhole tool can include a body having a bore or flowpath formed therethrough, and one or more sealing members disposed therein. The one or more sealing members can include an annular base and a curved surface having an upper face and a lower face, wherein one or more first radii define the upper face, and one or more second radii define the lower face, and wherein, at any point on the curved surface, the first radius is greater than the second radius. The sealing members can be disposed within the bore of the tool using one or more annular sealing devices disposed about the one or more sealing members.

REFERENCES:
patent: 244042 (1881-07-01), Farrar
patent: 2565731 (1951-08-01), Johnston
patent: 2756828 (1956-07-01), Deily
patent: 3015469 (1962-01-01), Falk
patent: 3533241 (1970-10-01), Richardson et al.
patent: 3831680 (1974-08-01), Edwards et al.
patent: 3980134 (1976-09-01), Amancharla
patent: 4218299 (1980-08-01), Lindell et al.
patent: 4510994 (1985-04-01), Pringle
patent: 4541484 (1985-09-01), Salerni et al.
patent: 4553559 (1985-11-01), Short, III
patent: 4605074 (1986-08-01), Barfield
patent: 4691775 (1987-09-01), Lustig et al.
patent: 4739799 (1988-04-01), Carney et al.
patent: 4813481 (1989-03-01), Sproul et al.
patent: 4969524 (1990-11-01), Whiteley
patent: 5012867 (1991-05-01), Kilgore
patent: 5188182 (1993-02-01), Echols et al.
patent: 5281270 (1994-01-01), Totten et al.
patent: 5479986 (1996-01-01), Gano et al.
patent: 5511617 (1996-04-01), Snider et al.
patent: 5607017 (1997-03-01), Owens et al.
patent: 5685372 (1997-11-01), Gano
patent: 5765641 (1998-06-01), Shy et al.
patent: 5924696 (1999-07-01), Frazier
patent: 6076600 (2000-06-01), Vick et al.
patent: 6220350 (2001-04-01), Brothers et al.
patent: 7168494 (2007-01-01), Starr et al.
patent: 2006/0131031 (2006-06-01), McKeachnie et al.
patent: 2007/0251698 (2007-11-01), Gramstad et al.
patent: 2009/0020290 (2009-01-01), Ross et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Downhole valve assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Downhole valve assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Downhole valve assembly will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4174442

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.