SWABBING PISTON Russian patent published in 1997 - IPC

Abstract RU 2094611 C1

FIELD: oil production industry. SUBSTANCE: this relates to extraction of oil from wells. Swabbing piston has widening part and annular base in which secured are ends of strips arranged over periphery of piston. Located inside set of aforesaid strips is flexible member. These strips are located so as to be in tight contact to each other and to form spindle-shaped outer surface of swabbing piston. EFFECT: high efficiency. 3 cl, 2 dwg

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RU 2 094 611 C1

Authors

Kozlov Aleksej Aleksandrovich

Dates

1997-10-27—Published

1994-09-14—Filed