CONE BIT SUPPORT Russian patent published in 2012 - IPC E21B10/25 

FIELD: mining.

SUBSTANCE: cone bit support comprises a journal, where a sealing element is installed, as well as a cutter fixed with a lock bearing. The support is equipped with a split bushing arranged with a bore on an outer surface for a sealing element, at the same time the journal in the area of placement of the sealing element is arranged at least with one radial channel, in which a rod is installed as capable of interaction with the inner surface of the split bushing, and the rod is made of a material with a coefficient of linear expansion, which exceeds the one of the journal and cutter material. The split bushing may be arranged with a circular collar on the inner surface, and journal and rod ends interacting with it - with a response circular slot.

EFFECT: higher service life and improved reliability of support sealing.

2 cl, 2 dwg