SUPPORT OF CONE BIT Russian patent published in 2009 - IPC E21B10/22 

FIELD: mining.

SUBSTANCE: invention refers to rock destroying tool, particularly to oil filled supports of drilling cone bits. The support consists of a claw with a tilted journal made with axial and radial channels for lubrication supply, of a sealing unit and of a roller cutter installed on a journal by means of journal bearing in form of a bushing with wedge shaped slots on the interior surface and of a locking bearing. The wedge-shaped slots on the interior surface of the bushing are made blind and are located from the side of the journal end. Another part of the bushing located from the side of the journal base is made with circular grooves on its exterior and interior surfaces for the sealing unit. The bushing is designed to rotate relative to the roller cutter. The exterior surface of the bushing is made with lengthwise slots arranged with an angle set off against the slots on its interior surface. The slots on the interior and exterior surfaces have equal length and are communicated between them with pass-through channels.

EFFECT: increased durability of support and cone bit on a whole due to increased support surface and due to increased reliability of sealing.

2 cl, 3 dwg