WELL JET DEVICE FOR TESTING AND STUDYING FORMATIONS AND THE OPERATING METHOD THEREOF

摘要

The invention relates to jet devices and the operating methods thereof and can be used in order to produce and intensify the oil inflow from a well. The inventive device comprises a jet pump arranged on a tubing string in the well with a casing string. An active nozzle and a mixing chamber are coaxially arranged in the body of said pump and a bypass channel provided with a mounting seat for a sealing unit with an axial channel or for functional inserts with autonomous instruments is embodied. The output of the pump is connected to an annular space of the tubing string, the input of a channel for supplying a working medium to the active nozzle being connected to the internal space of the tubing string above the sealing unit. A channel for removing the medium pumped out from the well is connected to the internal cavity of the tubing string below the sealing unit. Said device is also provided with a radiation source and a receiver-transducer of physical fields and a packer. The pump and a packer are arranged in the well below the casing string. The tubing string is provided with a rotating mechanism which is disposed between said pump and packer. The section of the tubing string disposed above the rotating mechanism is arranged in such a way that it is rotatable with respect to the rotating mechanism of the tubing string disposed thereunder by means of a drive arranged on the surface. Said rotating mechanism is disposed above the packer at a distance equal to or higher than the external diameter thereof. The aim of said invention is to increase the efficiency of tests and the reliability of information received during said tests.