PLUNGER OF OIL-WELL SUCKER-ROD PUMP Russian patent published in 1997 - IPC

Abstract RU 2084728 C1

FIELD: pump engineering. SUBSTANCE: plunger has a housing whose outer side is covered with an oil-resistant seal. Sealing rings made up as an expansion spring are fitted on the seal and tightened on the housing with the use of the valve unit. EFFECT: enhanced efficiency. 2 cl, 1 dwg

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RU 2 084 728 C1

Authors

Prizemirskij V.S.

Bychkov N.A.

Volynskij A.A.

Melekhina O.V.

Dates

1997-07-20—Published

1995-02-23—Filed