WELL SUCKER-ROD PUMP Russian patent published in 1994 - IPC

Abstract RU 2007618 C1

FIELD: oil and gas industry. SUBSTANCE: pump has a cylindric case provided with suction valve and fixed sealing unit and hollow plunger with a delivery plunger. The bottom of the case is provided with at least one additional sealing unit spaced from the main at a distance which follows a relationship available in the invention description. EFFECT: enhanced efficiency. 5 dwg

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RU 2 007 618 C1

Authors

Zakharov Boris Semenovich

Dates

1994-02-15—Published

1992-12-07—Filed