Packer set safety valve for controlling dual fluid flows

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

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Details

166122, 166126, 166129, 166142, 166319, 166384, E21B 3410, E21B 33128, E21B 33129, E21B 4312

Patent

active

055052630

ABSTRACT:
A packer set safety valve assembly for controlling annular and tubing flows within a subterranean wellbore is disclosed. The packer set safety valve assembly controls the annular and tubing flows through dual flow paths. The assembly includes a means, that is remotely actuatable, to secure the assembly within the wellbore, a means, also remotely actuatable, the allows selective control of fluid flow in the dual flow paths, and a means, remotely actuatable as well, to unsecure the assembly from within the wellbore. The packer set safety valve assembly is a "fail closed" design which prevents flows through the dual flow paths when the fluid flow control means is not actuated to allow flow.

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patent: 4432417 (1984-02-01), Bowyer
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patent: 4842074 (1989-06-01), Hines et al.
patent: 4844166 (1989-07-01), Going, III et al.
patent: 5048610 (1991-09-01), Ross et al.
patent: 5141057 (1992-08-01), Chaix

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