SEALED DRILLING BIT BEARING ASSEMBLY Russian patent published in 2010 - IPC E21B10/25 

FIELD: mining.

SUBSTANCE: sealed drilling bit bearing assembly contains lug support with spindle, implemented with channels for lubrication feeding, and mill cutter, fixed on spindle by means of retaining drilling bit bearing, and located in groove sealing flexible ring with rectangular cross section. Sealing ring is outfitted by springing element, allowing in cross section wavelike shape and located nearby its working surface, which is also implemented of wavelike shape, herewith projections and cavities of springing element and working surface of sealing ring are located in the same radial plane. Additionally end sites of springing element allows rack shape, which has projections of the same end site are overlapped with cavities of the other end site.

EFFECT: reliability growth sealing, improvement of protection of rest cavity against hit of sludge, increasing of lifetime of bearing and straight bit in whole.

3 cl, 4 dwg