| 摘要 |
The invention relates to devices for extracting oil from wells. The inventive device comprises a pipe string (1), a packer (2) with an axial through hole (3) and a support (4) in which an axial channel (5) with a seat (6) for mounting a jet pump (7) is made. A bypass channel (8) with a return valve (9) is made in the support (4) wall. The pump (7) has a cylindrical body (10) with an annular shoulder (11) for mounting the pump (7) on the seat (6) in the support (4). The body (10) has a channel (12) for supplying an active medium to the nozzle (13) of the pump (7), a channel (14) for supplying a pumped out medium, a channel (15) for removing a media mixture from the pump (7) and a through channel (16) with a sealing unit (17) arranged therein. The channel (16) is coupled to the channel (14) downstream of the unit (17). The unit (17) is provided with an axial channel (18) for passing and displacing a logging cable (19) together with an instrument (20). The channel (12) is coupled to the channel (8) and to a space around the pipe string (1). A mixing chamber (21), which is provided with a diffuser (22) connected to the pipe string (1) cavity upstream of the pump (7) via the channel (15), is positioned axially to the nozzle (13). The diameter of the channel (5) of the support (4) downstream of the seat is equal to or greater than the hole (3) of the packer (2). Said invention makes it possible to extend the device functionalities due to the possibility of disconnecting the in-tube space and casing annulus when the pump is stopped.
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