Wells – Packers or plugs – With expanding anchor
Reexamination Certificate
2005-03-15
2005-03-15
Dang, Hoang (Department: 3672)
Wells
Packers or plugs
With expanding anchor
C166S188000, C166S321000
Reexamination Certificate
active
06866095
ABSTRACT:
A downhole safety valve for a central circulation completion system having concentric inner and outer tubular members defining a production bore therebetween comprises a generally cylindrical body which includes an outer surface which is sealed to the outer tubular member and an axial through bore to which the inner tubular member is secured. In this manner, the downhole safety valve forms a pressure barrier between a first portion of the production bore located below the body and a second portion of the production bore located above the body. The downhole safety valve further comprises at least one flow passage which extends through the body and communicates between the first and second portions of the production bore, and at least one closure member which is disposed across the flow passage to control fluid flow between the first and second portions of the production bore.
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Dang Hoang
FMC Technologies Inc.
Query, Jr. Henry C.
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