Wells – Valves – closures or changeable restrictors
Patent
1977-05-26
1979-01-02
Novosad, Stephen J.
Wells
Valves, closures or changeable restrictors
166315, E21B 4308
Patent
active
041322703
ABSTRACT:
Well equipment such as packers, check valves, gas lift valves, sliding sleeves, side pocket mandrels, retrievable plugs and the like located anywhere in a well are protected from particles of solid debris by forming a column of a protective liquid having a density of at least about 3.0 grams per milliliter in contact with and extending above the equipment. The protective liquid serves as a barrier to prevent particles of debris having a density less than that of the liquid from settling on or around the equipment and working their way into small clearances where they may cause operational and other problems.
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Exxon Production Research Company
Finkle Y. S.
Novosad Stephen J.
Schneider J. S.
Suchfield George A.
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