CORE BREAKER LAYOUT Russian patent published in 2021 - IPC E21B25/00 

FIELD: mining.

SUBSTANCE: invention relates to mining, in particular to a device for separation and retention of the core. The arrangement of the core breakers contains a lever core breaker, which includes a cage with rotary levers equipped with cutting edges, and a collet core breaker in the form of a conical ring with an internal lead-in cone installed in a conical saddle with the possibility of limited axial movement. Collet core breaker is installed under the lever core breaker, which is located in the annular bore with the possibility of axial movement and transfer of the axial load to the collet core breaker, while the annular bore is installed in the upper part of the assembly body and has a length exceeding the height of the lever core breaker holder, and the collet core breaker has on the inner hard alloy surface.

EFFECT: reliable capture and retention of the core with an increase in its yield.

1 cl, 2 dwg