Wells – Packers or plugs – Controllable passage through packer
Patent
1983-07-14
1985-09-10
Novosad, Stephen J.
Wells
Packers or plugs
Controllable passage through packer
1661175, 166131, 166133, 166184, 166325, E21B 2303, E21B 3312, E21B 3410, E21B 3416
Patent
active
045400474
ABSTRACT:
This application discloses apparatus in which a body means having a bore therethrough connected as part of a tubing string is packed off within a well bore, and means including a passageway in the body means by-passes the packer to connect the annulus about the tubing string above and below the packer. The packer is expanded into engagement with the well bore upon release of a means for locking it in an inoperative position, and a means for so releasing the locking means includes a piston in the passageway which in responsive to control fluid supplied through a control line in the annulus which connects with the passageway. Upon release and setting of the packer, the piston is removed from the passageway and circulation of well fluid through the connecting means between the annulus above and below the packer is controlled by a safety valve which normally closes the passageway, but which is responsive to control fluid supplied thereto through the same control line. Each of the means for connecting the control line with the passageway in order to release the packer, and alternatively establishing safety valve controlled circulation of well fluid through the connecting means comprise tools which are alternately landed within and retrieved from a pocket formed in the body means to one side of its bore.
REFERENCES:
patent: 2982357 (1961-05-01), Kenneday
patent: 3375874 (1968-04-01), Cherry et al.
patent: 3627042 (1971-12-01), McGowen, Jr. et al.
patent: 3666012 (1972-05-01), Sizer et al.
patent: 3701382 (1972-10-01), Williams
patent: 3993129 (1976-11-01), Watkins
patent: 4239082 (1980-12-01), Terral
patent: 4249599 (1981-02-01), Krause
AVA International Corporation
Novosad Stephen J.
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