WELL JET PLANT FOR SELECTIVE TESTING OF BEDS Russian patent published in 2012 - IPC F04F5/54 E21B47/00 

FIELD: engines and pumps.

SUBSTANCE: plant comprises a slot filter with a cone-shaped protective element and a support with a relief channel with a check valve and with a seat for alternate installation of an ejecting hydrodynamic device or an ejecting geophysical device in it, comprising a cylindrical body 20 with a ledge 42 for installation in the support. In a body 20 there is a jet pump with a coaxial nozzle 21, a mixing chamber 22 and a diffuser 23, and there are channels 24, 25 for active medium supply into the nozzle 21 and pumped medium supply, a channel 26 of discharge and a through channel 27 with a sealing unit 28. A channel 27 is connected below the unit 28 to the channel 25. In the unit 28 there is an axial channel 43 to let through a logging cable 29 and an instrument 30. The channel 24 via the relief channel is communicated with the space that surrounds the tubing string (TS). The outlet of the diffuser 23 is communicated with the inner cavity of the TS. The hydrodynamic ejecting device comprises a cylindrical body with an independent pressure gauge installed underneath. In the body there is a jet pump with a nozzle and a mixing chamber with a diffuser, and there is a channel to supply medium pumped from the well and a longitudinal through channel with a check valve and a plug with a catcher head.

EFFECT: expansion of plant functional capabilities.