Annular gas trap

Details Annular gas trap Annular gas trap

1985-03-25

1986-10-07

Novosad, Stephen J.

Wells

Conduit wall or specific conduit end structure

Downhole coupling or connector

1661055, 1662441, E21B 4102

Patent

active

046153870

ABSTRACT:
Well apparatus for use in injecting corrosion inhibitor into the annulus between casing and tubing strings below an injection/packer assembly positioned in such annulus which includes an annular gas trap positioned below the injection/packer assembly. The annular gas trap comprises a plurality of individual gas traps. Each individual gas trap comprises a series of S-shaped conduits and includes one passageway open to the annulus above the gas trap and another passageway open to the annulus below the gas trap and a third passageway connecting those two passageways. A check valve may be positioned in each individual gas trap to prevent flow of fluids upwardly through the gas trap into the annulus above the gas trap and a seal may be provided on the gas trap to engage a polished bore receptacle formed on the casing string to seal off the space between the casing string and the annular gas trap.

REFERENCES:
patent: 3379259 (1968-04-01), Metler

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