Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent
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
Bednar John M.
Johnson Dale V.
Exxon Production Research Co.
Neuder William P.
Novosad Stephen J.
Schneider John S.
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