| 摘要 |
The inventive device comprises a jet pump (2) and a packer (3). The body (4) of the pump (2) comprises a nozzle (5) and mixing chamber (6) with a diffuser (7), which are coaxially arranged therein, and a stepped through channel (8) which is made therein, tapers from the top downward and is provided with a seat (9) between the steps. The channel (8) is made coaxially with a pipe string (1) and is coupled thereto. Each of the channels (10, 11) for supplying pumped from the well and active media is provided with a return valve (13, 14) and a restrictor (15, 16) for limiting the displacement of the locking member (17, 18) of the return valve (13, 14) upward with respect to the seat (19, 20) thereof. A sealing unit (21) in the form of a hollow stepped body with a sealing element (22) can be arranged in the through channel (8). An axial channel (23) for passing a rigid logging cable (24) with a well-logging instrument (25) is made in the sealing element (22). A guiding separation bush (26) which is cantilever fitted by the top end thereof to the top part of the body (4) of the pump (2) is mounted above the channel (8) axially thereto in the body (4) of the pump (2). Longitudinal slotted orifices (27) are made in the wall of the separation bush (26). The invention makes it possible to improve the reliability of the device and to optimize the sequence of operations during the well test. |
