Injection valve and method

Wells – Processes – Operating valve – closure – or changeable restrictor in a well

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C166S386000, C166S321000, C166S332800

Reexamination Certificate

active

07861790

ABSTRACT:
The present invention generally relates to controlling the flow of fluids in a wellbore. In one aspect, a valve for selectively closing a flow path through a wellbore in a first direction is provided. The valve includes a body and a piston surface formable across the flow path in the first direction. The piston surface is formed at an end of a shiftable member annularly disposed in the body. The valve further includes a flapper member, the flapper member closable to seal the flow path when the shiftable member moves from a first position to a second position due to fluid flow acting on the piston surface. In another aspect, a valve for selectively closing a flow path through a wellbore in a single direction is provided. In yet another aspect, a method for selectively closing a flow path through a wellbore in a first direction is provided.

REFERENCES:
patent: 2831499 (1958-04-01), Myron
patent: 2921601 (1960-01-01), Fisher, Jr.
patent: 2976882 (1961-03-01), Cowan
patent: 3084898 (1963-04-01), Miller
patent: 4151875 (1979-05-01), Sullaway
patent: 4601342 (1986-07-01), Pringle
patent: 4688593 (1987-08-01), Pringle et al.
patent: 5628792 (1997-05-01), Lentell
patent: 7455116 (2008-11-01), Lembcke et al.
patent: 2007/0181312 (2007-08-01), Kritzler et al.
patent: 1031139 (1966-05-01), None
GB Examination Report for Application No. GB0621713.7 dated Nov. 13, 2009.
Canadian Office Action for Application No. 2,599,073 dated Apr. 22, 2010.
GB Search and Examination Report for GB Application No. GB1017328.4 dated Oct. 28, 2010.

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

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

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

Rate now

     

Profile ID: LFUS-PAI-O-2710114

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