CONE BIT SUPPORT (VERSIONS) Russian patent published in 2009 - IPC E21B10/22 

FIELD: mining.

SUBSTANCE: invention is related to rock-destroying tool, namely to supports of drilling cone bits. Cone bit support comprises journal and roller cutter fixed on journal by means of lock bearing made in the form of two races that contact to each other along spherical surface, internal of which is fixed on journal, and external one - on roller cutter. External race is made in the form of two rings that contact to each other with their side surfaces and are rigidly connected one to another, at the same time maximum internal diametre of rings from the side of their contacting surfaces is more than external diametre of internal race. Rings may be connected one to another by means of pin or at the same time contacting side surfaces of rings are arranged with response protrusions and grooves.

EFFECT: simplified assembly, increased resistance of support and improved technical-economical indices of drilling works.

5 cl, 2 dwg