Concentric steaming string downhole apparatus

Details Concentric steaming string downhole apparatus Concentric steaming string downhole apparatus

1981-07-20

1983-08-23

Novosad, Stephen J.

Wells

Packers or plugs

Spaced sealing portions

166242, 166303, 166 57, E21B 33126, E21B 3600, E21B 4324

Patent

active

043998658

ABSTRACT:
A downhole concentric tubing string is disclosed for use in distributing steam, or other hot fluids, to separated subsurface formations along a well bore. The apparatus includes elements for deflecting the steam from one string into the annulus of a cased well for injection through openings into the formation, elements for conducting the steam in another of the concentric string to a second set of openings for injection into another portion of the formation, and elements for isolating and separating the two separate injection intervals.

REFERENCES:
patent: 2754098 (1956-07-01), Heinze
patent: 3349850 (1967-10-01), Schlicht et al.
patent: 3392783 (1968-07-01), Reed
patent: 3565175 (1971-02-01), Wilson
patent: 3630573 (1971-12-01), Goddin, Jr. et al.
patent: 3835889 (1974-09-01), Hyde
patent: 4081028 (1978-03-01), Rogers
patent: 4099563 (1978-07-01), Hutchison et al.

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