METHOD AND DEVICE FOR INTENSIFYING OPERATION OF WELL Russian patent published in 1997 - IPC

FIELD: oil production industry. SUBSTANCE: this is to induce oil inflow from reservoir by multiple depression pulses of liquid due to changing volume of peripheral zone of well hollow. Each depression pulse is accompanied with mechanical impact load applied to casing tube. With that, increased is level of total depression in productive zone. Device has body with chambers of variable volume. Under action of rotor drive, each chamber depending on character of planned effect upon producing reservoir is connected with peripheral zone of well hollow and/or with above-packer space. Chamber for withdrawing fluid in connection systems is provided with inlet valve and outlet valve to create depression pulse. Other chamber is connected only with peripheral zone of well hollow to initiate hydraulic action pulse (without valve in connection system). Impact load is made by striker in cooperation with cam installed on rotor axle. EFFECT: high efficiency. 9 cl, 19 dwg