| 摘要 |
The invention relates to pumps, in particular to oilwell pumping units for crude-oil production. The inventive oilwell pumping unit comprises a wall packer mounted on a pipe string, a back valve, a jet pump fitted with an active nosepiece, a mixing chamber, a diffusing cell and a central channel i n order to supply a passive medium, and a seal assembly. Said unit is also provided with a filter and a perforator. The operation mode consists in mounting the jet pump on the pipe string and the perforator thereunder, arranging the wall packer in the annular space of the pipe string, supplying an ejecting liquid medium through the pipe string to the nosepiece of the je t pump, removing the liquid medium from the area beneath the packer with the a id of the jet pump and in draining the bench by blasting the perforator. The invention makes it possible to intensify an action on a well bore zone by optimizing different influencing factors for wells having an anomalously low formation pressure.
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