The invention provides an ejection pressurizing type sleeve gas
recovery device which is used for recovering sleeve gas in a
wellhead of an
oil field. The ejection pressurizing type sleeve gas
recovery device comprises an ejector, a gas-liquid mixing and conveying pump, a liquid
inlet valve, a liquid outlet valve, gas inlet valves, a gas
storage tank, a
gas pressure sensor, a gas flow meter, an electric valve, a
control unit and the like, and is integrally manufactured into a skid-mounted block. A liquid inlet opening of the ejector is connected with the upstream part of an oil outlet pipeline of an
oil well, and a liquid outlet opening of the ejector is connected with an inlet of the gas-liquid mixing and conveying pump. When the ejection pressurizing type sleeve gas
recovery device works normally, the liquid
inlet valve and the liquid outlet valve are both opened; when the pressure of the sleeve gas reaches a certain value, the
gas pressure sensor transmits a
signal to the
control unit, the
control unit sends an instruction to start the gas-liquid mixing and conveying pump, and the electric valve is opened in a delayed mode; liquid which flows at a high speed in the ejector sucks in the sleeve gas, the liquid and the sleeve gas are mixed to enter the liquid-
gas mixing and conveying pump to be pressurized, and then are conveyed into the oil outlet pipeline of the
oil well, the sleeve gas can be recovered, and the situation that waste of energy sources and
air pollution are caused by
combustion or emptying of the sleeve gas is avoided.