| 摘要 |
The inventive plant comprises a jet pump and a packer. A stepped through channel provided with a seat, a channel, which is used for supplying liquid media pumped out from a well and which is connected to the stepped channel downstream of the seat and a channel for supplying an active working media and is connected to an active nozzle and to a tube string cavity upstream of the pump, are embodied in the pump body. The channel for supplying the pumped out medium is connected to the tube string cavity downstream of the stepped channel through a return valve. The stepped channel is provided with a packing unit embodied in the form of a sealing element and a stepped piston which is spring loaded with respect to the sealing element. Holes are embodied in the body of the packing unit in front of the by-pass openings of the pump body. The piston and sealing element are provided with channels which are embodied therein and used for passing a logging cable. The invention makes it possible to improve the operational reliability of the plant by preventing a liquid overflow to a tail space when a work is stopped. |
