Subsurface annular safety barrier

Details Subsurface annular safety barrier Subsurface annular safety barrier

2006-09-19

2009-06-09

Gay, Jennifer H (Department: 3672)

Wells

Processes

Placing or shifting well part

C166S187000

Reexamination Certificate

active

07543652

ABSTRACT:
A subsurface annular safety barrier for controlling fluid flow in the tubing-casing annulus in an annular flow well. The barrier may be positioned proximate the top of a formation to block fluid flow through the annulus upon loss of casing integrity. An embodiment of the annular safety barrier includes a packer and a valve, wherein the valve is operated to a closed position without mechanical manipulation of the tubing.

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