DRILL ROCK BIT WITH SEALED SUPPORT Russian patent published in 2012 - IPC E21B10/24 

FIELD: mining.

SUBSTANCE: screw pump is designed in a pin driven by a cone roller through a slip coupling. Pump cylinder and container for lubricating fluid have cupper coating. Circulating lubrication system ensures the effective bearing lubrication and cooling and causes wearlessness effect.

EFFECT: invention provides to raise stability by means of execution the permanent lubrication circulation with productivity, proportional to the bit speed; bit capability is increased all in all, which makes better drilling work progress data.

2 cl, 1 dwg