DOWNHOLE ELECTRIC VALVE WITH ELECTROHYDRAULIC DRIVE Russian patent published in 2024 - IPC E21B34/06 E21B43/12 F16K31/04 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, namely to underground well equipment, in particular to well electric valves for killing, development, flushing, hydraulic fracturing of productive formation, subsequent control and regulation of inflow or injection to increase oil and gas recovery. Electric valve for installation in the well as part of the well pipes is made with the possibility of controlling the fluid flow between the space inside the pipes and the space behind the pipes at the valve location. Electric valve contains hollow cylindrical housing (1) with circulation holes (6), movable bushing-gate (4) located inside the housing, which is made with possibility of linear movement between an open position and a closed position in response to a signal coming via a communication channel. Movable bushing-gate (4) is directly connected to piston (10) equipped with reverse stroke spring (5). Housing (1) has at least one sealed compartment with electric linear drive (2) having piston (9) hydraulically connected to piston (10) of bushing-gate (4). Ratio of the cross-sectional area of piston (10) of the bushing-gate to the cross-sectional area of piston (9) of electric linear drive (2) is directly proportional to the ratio of the force required to shift movable bushing-gate (4) to the open position to the force developed by linear electric drive (2), and inversely proportional to the ratio of the stroke of movable bushing-gate (4) to the stroke of piston (9) of the electric linear drive.

EFFECT: increasing the reliability of the electric valve.

7 cl, 4 dwg