WELL JET PLANT FOR SELECTIVE TESTING OF FORMATIONS Russian patent published in 2017 - IPC F04F5/54 E21B47/00 

FIELD: engine devices and pumps.

SUBSTANCE: plant contains a tubing string, on which there a support provided serially from the bottom-up, in which body a stepped through channel with a seat for installation of geophysical ejecting device therein is built. A return valve is installed on a bypass channel. The geophysical ejecting device comprises a cylindrical body, on which outer surface a circular step is made for installing the geophysical ejecting device. The jet pump is installed in the body of the geophysical device. The pump through channel is connected below sealing unit to a channel for supplying medium pumped out of the well. The sealing unit has an axial channel for passing a logging cable therethrough for mounting a logging tool for moving it along the well bore. A channel for supplying active medium into the jet pump nozzle communicates with the support bypass channel and through the latter one to a space surrounding the tubing string. A mixing chamber with a diffuser is installed coaxially with the jet pump nozzle. The diffuser is communicated with internal cavity of the tubing string. Above the latter, the plant is equipped with external tubing string installed in the well in the space between the tubing and the production strings to form an annular channel. The tail-accumulator of solid particles-impurities of the medium pumped out of the well is installed in series from the bottom up on the external tubing, a lower packer located below the formation under testing with the support on the production string or the lower packer of pressure effect, a slit filter, which height is at least two meters is greater than the thickness of the formation under testing and the upper packer of the pressure effect is located above the cap of the formation under testing. In the external string above the upper packer of the pressure effect, there is a support ring is mounted for the support mounted on the tubing.

EFFECT: extension of plant functionality.

1 dwg