SUPPORT OF DRILLING CONE BIT (VERSIONS) Russian patent published in 2009 - IPC E21B10/22 

FIELD: mining.

SUBSTANCE: invention refers to rock destroying tool, particularly to supports of drilling cone bits of a smaller diameter. The support of the drilling cone bit contains a claw with a tilted journal and a roller cutter installed there on by means of peripheral roller bearing and a locking unit. The roller cutter in peripheral part has lengthwise slots of part of cylinder shape in cross section; the lengthwise slots form a separator for the roller bearing. According to the second version the journal has lengthwise slots in the peripheral part with shape of part of cylinder forming a separator for the roller bearing. The suggested design of the support facilitates uniform loading of roller bearings, eliminates their wedging and increases hardness of a roller cutter case which increases efficiency of both support and drilling cone bit as a whole.

EFFECT: facilitating uniform loading of roller bearings, eliminates their wedging and increases hardness of roller cutter case which increases efficiency of both support and drilling cone bit as a whole.

2 cl, 3 dwg