DEVICE FOR REDUCING GAS PRESSURE IN ANNULAR SPACE OF PUMPING WELLS Russian patent published in 2016 - IPC E21B34/02 F16K49/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, in particular to jet pumps and can be used for annular gas bypassing in discharge line in oil production with high pressure of oil saturation with gas in wells operated by submersible pump units. Device includes check valve installed on line connecting annular space of well with its delivery line, and its operation control unit made in form of a jet device installed in delivery line of well equipped with heating system in form of a heat pump. Heat pump is a coolant-filled inner circuit consisting of pipe-connected compressor, heat exchanger and expander, and evaporator, and hydraulic agent-filled external circuit consisting of pipes laid in soil in borehole below freezing depth and laid through evaporator of internal circuit. Heat exchanger is a hollow cylinder, on walls of which there are channels for passage of freon, maximally close to external surface of delivery line, in close proximity to jet apparatus.

EFFECT: high efficiency of production wells at subzero ambient temperatures.

3 cl, 2 dwg