Patent ID: 7234520

Claim:
A well jet device for testing and studying formations, comprising a jet pump installed on the tubing string in a well with the casing string, in the body of the jet pump an active nozzle and a mixing chamber are coaxially arranged and a through passage is made with a mounting seat for installing either a sealing unit with an axial passage or replaceable functional inserts with autonomous instruments arranged below them, the output side of the jet pump being connected to the tubing string annular space, and the input side of the passage for supplying the working medium to the active nozzle of the jet pump being connected to the inner cavity of the tubing string above the sealing unit, and the passage for supplying the medium pumped by the jet pump out of the well being connected to the inner cavity of the tubing string below the sealing unit, the said well jet device being provided with a radiation source and a receiver-transducer of physical fields and with a packer, these being arranged, respectively, on the cable and on the tubing string below the jet pump, the jet pump and the packer being arranged in the well below the casing string, the tubing string being provided with a rotating mechanism being arranged between the jet pump and the packer, and the section of the tubing string disposed above the rotating mechanism being arranged with the possibility of rotating it relative to the section of the tubing string disposed under the rotating mechanism by means of a drive arranged on the surface, and the rotating mechanism being arranged above the packer at a distance equal to or greater than the external diameter of the packer.