FIELD: mechanical engineering; mining.
SUBSTANCE: invention relates to oil and gas production and can be used for injection of various chemicals during development and testing of oil and gas wells, including underwater wells. Valve for dosed supply of liquid medium contains a shut-off-control element installed in a sealed housing, which includes a seat and a gate connected to a linear drive, a flow meter, pressure sensors and a working cavity connected to the formed seat and gate by a channel for supply of liquid medium. Gate and the seat form between each other a cylindrical channel for feeding the liquid medium and are placed in a sleeve made in the zone of contact with the working cavity with holes connecting the working cavity with the cylindrical channel for feeding the liquid medium when the valve is opened.
EFFECT: increasing the accuracy of dosing of liquid media due to the presence of a turbulent and laminar stage of liquid flow in the shut-off and control element.
5 cl, 4 dwg
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