Subsurface safety valve and method for chemical injection...

Details Subsurface safety valve and method for chemical injection... Subsurface safety valve and method for chemical injection...

2008-10-31

2011-11-15

Andrews, David (Department: 3672)

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

C166S322000

Reexamination Certificate

active

08056637

ABSTRACT:
A subsurface safety valve is modified to permit the passage of a downhole treatment chemical through the valve while bypassing a valve closure member which is maintained within the safety valve in operative condition.

REFERENCES:
patent: 6991040 (2006-01-01), Hill, Jr. et al.
patent: 7188674 (2007-03-01), McGavern et al.
patent: 7198099 (2007-04-01), Lugtmeier et al.
patent: 7637326 (2009-12-01), Bolding et al.
patent: 2008/0169106 (2008-07-01), Hill et al.
patent: 2008/0230231 (2008-09-01), Bolding et al.
patent: 2008/0308268 (2008-12-01), Hill et al.
patent: WO2007073401 (2007-06-01), None

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