| 摘要 |
The invention relates to pumping engineering. The inventive well jet device makes it possible to form, by means of a jet pump, the range of different depressions in the tail area of a well at a specified value of differential pressure. A logging instrument (22) makes it possible to record the physical parameters of the well and of a medium pumped out therefrom. The well operating modes are adjusted by means of a spring-loaded stepped piston (17) which is positioned in the body (14) of a seal unit (13) in such a way as to open and close holes (10, 19). Return valves (12, 24) located in channels (9, 11) for supplying the pumped out and active media, in combination with a stepped through channel (7), the diameter of which is equal to or greater than the diameter of the axial through hole (25) of a packer (3) and which is made in the body (4) of the pump (2) below a mounting seat (8), make it possible to supply chemical reagents along a pipe string to a production formation without additional units and to prevent media, which are pumped to the production formation, from penetration into the annular above-packer space. Said invention makes it possible to increase the reliability and performance of the device by preventing the active medium from backflowing and by maintaining the depression produced on the formation when the jet pump is stopped. |
