HYDRAULIC PULSE GENERATOR OF ELASTIC WAVES Russian patent published in 2000 - IPC

FIELD: oil and gas production, specifically, recovery of liquid and gaseous hydrocarbons to keep seam pressure by pumping working reagent into productive pool trough it. SUBSTANCE: hydraulic pulse generator includes body, inlet and outlet conduits, rotating impeller installed inside body and unit fixing generator in tubing string with sealing members. Outlet conduits in bottom of generator body have thread for use of various extension pieces with different flow sections. Their arrangement and configuration of impeller are so implemented that rotation of impeller under pressure of fluid opens in turn full flow section of one conduit only. Area of its flow section is always smaller than area of section of inlet conduit. There exists clearance between body bottom and base of impeller. It is filled with working fluid to compensate for pressure of same fluid across blades of impeller. EFFECT: enhanced efficiency of working of face zone of pool by vibration. 2 dwg