DEVICE FOR PULSE ACTION ON PARAFFIN-RESINOUS DEPOSITS Russian patent published in 2003 - IPC

FIELD: oil producing industry; applicable in oil wells equipped with sucker-rod pumping units for acting on paraffin-resinous deposits and sucker-rods freeing. SUBSTANCE: device consists of wellhead equipment made for communication of pipe cavities with gas supply system and pressure-reduction system. Located on wellhead equipment is funnel with side branch for connection with gas supply system. Said funnel presents pulse source of acoustic shock waves. Pulse source is made in form of successively located hollow chambers separated by blowout diaphragms. Chambers are controlled by a system of locking members connected with high-pressure gas source. EFFECT: economically efficient device, and its efficient use in withdrawal of sucker-rod string from zones of paraffin deposits. 2 dwg