Downhole safety valve apparatus and method

Details Downhole safety valve apparatus and method Downhole safety valve apparatus and method

2005-10-07

2009-12-29

Wright, Giovanna C (Department: 3672)

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

C166S322000, C166S386000, C166S322000, C166S325000

Reexamination Certificate

active

07637326

ABSTRACT:
A safety valve (100) replaces an existing safety valve (102) in order to isolate a production zone from a tubing string when closed. Preferably the safety valve (100) includes a flow interruption device (106) displaced by an operating conduit extending from a surface location to the safety valve (100) through the inside of the production tubing. A by-pass conduit (150) allows communication from a surface location to the production zone through the safety valve (100) without affecting the operation of the safety valve (100).

REFERENCES:
patent: 3412687 (1968-11-01), Moore, Jr.
patent: 4367794 (1983-01-01), Bednar et al.
patent: 4746423 (1988-05-01), Moyer
patent: 5803173 (1998-09-01), Fraser, III et al.
patent: 6973970 (2005-12-01), Johnston et al.
patent: 7198099 (2007-04-01), Lugtmeier et al.
patent: 2008/0164035 (2008-07-01), Bolding et al.
PCT International Search Report and Written Opinion corresponding to PCT/US2005/036065, dated Jun. 16, 2006.

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