DEVICE AND SYSTEM (VERSIONS) FOR INCREASE OF LIQUID RECOVERY FROM UNDERGROUND BEDS Russian patent published in 2003 - IPC

FIELD: separators for separation of gas from liquid in well and prevention of gas getting into production string and fluid passage in liquid state. SUBSTANCE: system for liquid recovery from bed has downhole injector ensuring passage of bed fluids to production string and preventing passage of gases. Packer is located above injector. Ventilating pipe for gases runs through packer. Annular space above packer is communicated with production string above packer through one or more through holes for fluid passage. Injector has case with seat of cutoff valve, locking member of cutoff valve. There is a fluid sensitive float and movable relative to case. Located in injector case, across inlet hole is a strainer. Locking member of cutoff valve is located along vertical at a distance from check valve within nominal outer diameters of injector case. EFFECT: higher reliability in prevention of gas getting into production string, increased service life of submersible pumps. 12 cl, 12 dwg