FIELD: well jet pumping units. SUBSTANCE: well jet pumping unit has packer, jet pump with step passage channel, sealing unit, logging cable and changeable functional inserts: pressure differential, blocking and insert for recording of curves of formation pressure recovery in well under-packer space. Installed under jet pump in tubing is device with step passage channel for installation of insert for recording of curves of formation pressure recovery in well under-packer space. Installed under insert for recording of said curves is instrument for recording of bottomhole pressure and parameters of formation fluid, or instrument for transmission of said information to surface. Length of insert for recording of said curves is larger than tubing inner diameter. Diameter of jet pump passage channel above landing place is, smaller than inner diameter of tubing, at least by 1 mm, and is larger than diameter of lower step of jet pump passage channel, at least, by 0.5 mm. Diameter of lower step of jet pump passage channel is larger than diameter of upper step of passage channel of device for installation of insert for recording of said curves by, at least, 0.8 mm, and larger than diameter of lower step passage channel by, at least, 1.8 mm. Diameter of insert for recording of said curves is smaller than lower step of jet pump passage channel by, at least, 0.5 mm. EFFECT: optimized dimensions of well jet pumping unit, higher its operate reliability and output. 2 dwg
