MAGNETIC ANTI-GAS LOCK ROD PUMP Russian patent published in 2018 - IPC F04B47/02 F04B53/10 

FIELD: hydraulic displacement machines; pumps and compressors.

SUBSTANCE: invention relates to the field of oil well pumps for pumping a well fluid. Well pump comprises a standing valve seat with a standing valve mounted in a lower end of a barrel. Plunger is carried within the barrel for axial stoking movement. Travelling seat with a travelling valve are mounted in a lower end of the plunger. Travelling valve has a head that lands on the travelling valve seat while the travelling valve is in a closed position. Travelling valve has a stem extending downward from the head through a hole in the travelling seat. Stem is a permanent magnet. Another permanent magnet is carried by the barrel below the travelling magnet. Polarities of the magnets are configured to interact and cause the travelling valve to lift relative to the travelling seat to an open position as the plunger nears a bottom of a stroke.

EFFECT: preventing the maintenance of the closing position of the travelling valve throughout the downward stroke, which prevents the formation of a gas lock, which will lead to a failure of the pump to pump fluid in the direction of the wellhead.

20 cl, 6 dwg