OVERFLOW CHECK VALVE Russian patent published in 2012 - IPC E21B21/10 E21B4/02

Abstract RU 2466265 C1

FIELD: oil and gas production.

SUBSTANCE: device comprises a spring-loaded stop element, an elastomer seat with guide ribs, collars with central holes, valve seats. The valve is installed in the nipple of the hinged joint or torsion bar of the spindle in a screw bottomhole motor, in which holes are made for possible passage of a working medium.

EFFECT: simplified design, higher reliability.

6 cl, 6 dwg

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RU 2 466 265 C1

Authors

Polej Nikolaj Lejbovich

Dates

2012-11-10—Published

2011-04-29—Filed