DIAMOND CORE-DRILLING BIT FOR DRILLING WITH BUBBLE AERATION Russian patent published in 2009 - IPC E21B10/48 

FIELD: mining.

SUBSTANCE: this invention refers to the rock destruction tools, and in particular, to the core-driling bits for the drilling of the wells with the bubble aeration. Diamond bit includes the body with the annular groove in the external surface and the matrix connected thereto and divided for the sectors by the end and side external and internal slots. The length of the operation sector of the matrix in the average diametre of the bit is determined by the mathematic ratio. Along the external surface of the body there are longitudinal slots extending external side slots of the matrix and communicating with the annular groove. Annular groove in its longitudinal section has the semicircle design and is made with the radial holes connecting the groove with the internal hollow of the bit.

EFFECT: improvement of the operation resistance of the diamond bit.

3 dwg