Wells – Packers or plugs – With expanding anchor
Patent
1991-01-22
1993-03-16
Dang, Hoang C.
Wells
Packers or plugs
With expanding anchor
1661175, 166183, 166321, 166322, 166324, E21B 3410, E21B 2303
Patent
active
051936151
ABSTRACT:
There is disclosed apparatus for use in controlling flow through a tubing string suspended and packed off within a well bore and within the annulus between the string and well bore above and below the packer by tools adapted to be lowered into and raised from landed positions within a pocket to one side of a bore through a mandrel connected as part of the tubing string for releasing the packer to be set and opening a bypass therein and for opening and closing a flapper in the bore, as well as the bypass responsive to the supply of control fluid from a remote source to the pocket.
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AVA International Corporation
Dang Hoang C.
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