CHANNELS FOR HYDRO-DYNAMIC SUPPLY OF LUBRICATION FOR BIT WITH CONE ROLLER CUTTER Russian patent published in 2009 - IPC E21B10/24 

FIELD: mining.

SUBSTANCE: invention refers to roller cutter rock destruction tool, particularly to systems of bit support lubrication. The cone bit consists of a case, of at least one drilling bit leg with a journal, of a roller cutter, of a reservoir for lubrication with a pressure compensator assembled in the case and of channels for supplying lubrication to interfacing surfaces of the support during cone bit operation. Lubrication is supplied into channels between the roller cutter and the journal from the lubricating reservoir in the case. Also the first channel goes from the lubricating reservoir to a groove cut on the not loaded side of the journal. The second channel goes from the lubricating reservoir to a groove cut on surface of the journal within the ranges from 185° to 225°, if looked at from the side of the internal end of the journal, where there is the region of divergence of a circular gap between the journal and the roller cutter, primarily in the region of rapid pressure drop from the loaded side of the journal.

EFFECT: increased wear resistance of bit support.

23 cl, 6 dwg