DOUBLE-STAGE PULSATOR FOR TREATMENT OF BOTTOM-HOLE ZONE IN OIL BED Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: device is intended for treating bottom-hole zone of oil bed by hydrodynamic pulsing action. Pulsator has at least two pulse generators which are installed in succession and hydraulically interconnected. Each pulse generator has circular confuser chamber and circular vortex chamber which are installed in succession. Confuser chamber through multi-thread spiral passages is connected with inlet axial passage. Vortex chamber through side tangential outlet passages made in replaceable nozzles is connected with diffuser circular chamber. Relative positioning of outlet side tangential passages of adjacent pulse generators can be changed in longitudinal and lateral planes. Number of tangential passages in single pulse generator is equal to 3, and in other pulse generator their number is equal to 6. Application of aforesaid device increases zone subject to simultaneous treatment and improves operating efficiency. EFFECT: higher efficiency. 4 cl, 1 dwg