FIELD: oil production, particularly downhole sucker-rod pumps operating in wells with watered product and adapted for separate oil and water production.
SUBSTANCE: assembly comprises sucker-rod pump, production tubing and packer. Pump section located over piston is separated from production string interior with partition and is communicated with tube annuity. Production string interior is communicated with lower part of tube annuity over packer through channel. Check valve is installed in channel, which communicates lower part of tube annuity with production tubing interior. Float-operated valve is installed at channel inlet. Float has positive buoyancy in water and negative buoyancy in oil.
EFFECT: simplified structure and increased operational reliability.
3 cl, 2 dwg
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