| 摘要 |
The invention relates to well jet devices used for testing and developing wells. The arrangement of a return valve and two windows in a channel for supplying a medium which is pumped-out from a well makes it possible to prevent the working medium from spontaneously flowing into the under-packer area when the jet pump is in operation or not. The connection of the channel for supplying a medium pumped-out from a well to the internal cavity of a pipe string, when the output of a diffuser is connected to the annular space, and the use in the device of a working medium switch, which is embodied in the form of a movable spring-loaded steady bush, makes it possible to increase the operational reliability and efficiency of the device by optimising the structural design thereof.
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