METHOD FOR LIQUIDATION OF ASPHALT-RESIN-PARAFFIN DEPOSITS IN A WELL Russian patent published in 2004 - IPC

FIELD: mining industry.

SUBSTANCE: method includes lowering cleaning device on cable, which includes pump, down to deposit surface, moving cleaning devices through asphalt-resin-paraffin deposit under effect from gravity, pumping liquid through cleaning device in direction towards place of asphalt-resin-paraffin deposit destruction with alternating strength and use of impact effect from well liquid jet. Cleaning device additionally contains pneumatic hydraulic accumulator filled with gas placed in impenetrable cover, connected by channel through ball valve to pump. Below hydraulic pneumatic accumulator pressure valve is serially placed. High pressure and low loss pump is used. Pumping of well liquid through cleaning device towards place of asphalt-resin-paraffin deposit destruction with alternating strength and use of impact from well liquid jet is performed by pumping it into hydraulic pneumatic accumulator, compressing it by gas pressure in it and blowing out by compressed gas pressure to asphalt-resin-paraffin deposit to be destroyed when pressure valve operates.

EFFECT: higher efficiency.

1 dwg