Safety valve lock out system and method

Details Safety valve lock out system and method Safety valve lock out system and method

2007-08-07

2007-08-07

Bagnell, David (Department: 3672)

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

C166S285000, C166S323000, C166S320000

Reexamination Certificate

active

10868076

ABSTRACT:
A safety valve lock out system and method. In a described embodiment, a method of locking out a safety valve in a subterranean well includes the steps of: flowing a hardenable fluid into the safety valve; and preventing a closure device of the safety valve from closing with the hardenable fluid.

REFERENCES:
patent: 4664192 (1987-05-01), Hogarth
patent: 6059041 (2000-05-01), Scott
patent: 6520256 (2003-02-01), Ferg
patent: 2004/0084182 (2004-05-01), Edgar et al.

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