| 摘要 |
1. The downhole jet unit comprising a packer, a piping string and a jet pump, in the body of which an active nozzle and a mixing chamber are axially arranged, and a pass channel is made with a mounting face for installing a sealing assembly having an axial channel, said unit being provided with an irradiator and receiver-transformer of physical fields, which is arranged at the jet pump side for entry of the medium pumped out of the well and is mounted on the cable put through the axial channel of the sealing assembly, the jet pump output side is connected to the piping string above the sealing assembly, the input side of the channel for supplying the pumped out medium of the jet pump is connected to the piping string below the sealing assembly, and the input side of the channel for supplying the working medium to the active nozzle is connected to the space surrounding the lifting pipe string, and several channels for supplying the pumped out medium are made in the body of the jet pump, wherein the diameter of each channel for supplying the pumped out medium is not less than the inner diameter of the nozzle output cross-section, the diameter of the pass channel in the area of the mounting face is, at least, 1 mm less than its diameter above the mounting face, the diameter of the axial channel in the sealing assembly is, at least, 0.01 mm larger than the diameter of the cable, the diameter of the sealing assembly is, at least, 2 mm less that the diameter of the inner hole of the tubes, the diameter of the irradiator and receiver-transformer of physical fields is, at least, 2 mm less that the diameter of the pass channel in the area of the mounting face, the diameter of the pass channel in the packer is, at least, 2 mm larger than the diameter of the irradiator and receiver-transformer of physical fields, and in the lower portions of the channels for supplying the pumped out medium positions are made for installing check valves or other devices.
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