METHOD FOR REMOVING SOIL CORE FROM PIPE AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2010 - IPC E02F5/18 

FIELD: mining.

SUBSTANCE: method involves simultaneous periodic impact action on the pipe hammered into soil body throughout the passage length and opposite directed action of static squeezing force on soil core through the piston located in front pipe part in case there is elastic coupling between the pipe and soil body. Device includes pneumatic hammer acting on the pipe hammered into the soil body throughout the passage length and the piston arranged in the front pipe part. There is elastic coupling between the pipe and soil body.

EFFECT: increasing cleaning efficiency owing to increasing intensity of pipe vibrations under influence of back-and-forth power pulses by changing the vibrating system structure.

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