| 摘要 |
pumping equipment mainly, deep-well pumping units for oil recovery from wells. SUBSTANCE: downhole jet plant has packer, pipe string and jet pump. Installed coaxially in jet pump body is active nozzle with mixing chamber and trough channel with mounting seat for installation of sealing unit with axial channel. Downhole jet plant is provided with radiator and receiver-converter of physical fields located on the side of inlet of medium pumped from well into jet pump and installed on cable passed through axial channel of sealing unit. Diameter of channel of supply of working medium is not smaller than diameter of mixing chamber. Diameter of through channel below mounting seat is smaller than its diameter above mounting seat by, at least, 0.8 mm. Diameter of sealing unit is smaller than diameter of internal cavity of pipes by, at least, 1.6 mm. Diameter of axial channel in sealing unit is larger than cable diameter by, at least, 0.009 mm. Diameter of radiator and receiver-converter of physical fields is smaller than diameter of through channel below mounting seat by, at least, 1.6 mm. Diameter of packer through channel is larger than diameter of radiator and converter of physical fields by, at least, 1.6 mm. EFFECT: higher reliability of downhole jet pump. 2 dwg
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