WELL JET FACILITY FOR EXPLORATION AND TESTING OF WELLS WITH LOW PRESSURES OF HORIZON

摘要

FIELD: oil and gas industry. ^ SUBSTANCE: facility is designed for exploration and testing of wells with low pressures of horizon. In tube column 1 there is installed packer 2. In annulus space (AS) 3 above packer 2 there is installed jet pump (JP) 4. Active nozzle 5 with mixing chamber 6 and diffuser 7 are arranged in JP 4. Output of diffuser 7 is connected with AS 3 above packer 2. In case of JP 4 there is made channel 8 of pumped-off medium supply, pass-through channel 9 with saddle 10 and bypass channel (BC) 11 connecting channel 8 with an input to mixing chamber 6. Pressure tight unit 12 is installed into saddle 10; axial channel 13 for logging cable 14 is made in pressure tight unit 12. Thrust elements 15 and elastic washers 16 are positioned in pressure tight unit 12. Complex geophysical apparatus 17 is secured to logging cable 14 from the side of channel 8. Also a discharge channel 18 is made in case of JP 4; the said channel connects AS 3 and channel 8. Reverse valve 19 is installed in BC 11, and cylinder valve 20 is installed in discharge channel 18; valve 20 shuts it in its initial position. Discharge channel 18 has over-valve reservoir 22 connected via channel 21 with BC 11; spring 23 and adjusting washers 24 are positioned in over-valve reservoir 22. Inserted plug 25 is located at the output of diffuser 7. ^ EFFECT: discharge channel 18 and installation of reverse valve 19 in BC 11 increases reliability of jet facility and quality of performed operation. ^ 2 cl, 2 dwg