Wells – Above ground apparatus – Inner member anchor or seal with lateral port
Patent
1991-02-01
1992-03-03
Neuder, William P.
Wells
Above ground apparatus
Inner member anchor or seal with lateral port
166212, E21B 3304
Patent
active
050924001
ABSTRACT:
The invention relates to a coiled, endless, tubing hanger, for positive control of well bore pressure. A hanger tool is provided for use with coiled tubing strings when the strings are being installed in new or existing cased well bores. Means are provided hydraulically to seal off well bore pressure between the outside diameter of the coiled tubing string and the annuulus of the hanger tool during installation or removal of the coiled tubing strings. Means are also provided to retain and suspend coiled tubing strings in cased well bores over extended periods of time, or, indefinitely. Mechanical means are provided to seal off well bore pressure between the outside surface of the coiled tubing string and the annulus of the hanger tool during extended or permanent installations of coiled tubing strings in case well bores through transfer of the coiled tubing string plate means by which both the hydraulic and mechanical seals use the same sealing pack-off elements.
REFERENCES:
patent: 2712455 (1955-07-01), Neilon
patent: 3438654 (1969-04-01), Jackson, Jr. et al.
patent: 3478822 (1969-11-01), Holbert, Jr. et la.
patent: 4071085 (1978-01-01), Grable et al.
patent: 4307783 (1981-12-01), Lanmon, II
patent: 4532987 (1985-08-01), Reed
patent: 4646827 (1987-03-01), Cobb
patent: 4836289 (1989-06-01), Young
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