BORING ROCK DESTRUCTION TOOL Russian patent published in 2010 - IPC E21B10/48 

FIELD: mining.

SUBSTANCE: invention refers to boring rock destruction tool of cutting type, mainly with diamond structure. Boring rock destruction tool includes a housing with water courses and cutters with diamond carbide blades and tail ends, which are installed in sockets of the working part of the housing and fixed in the sockets with pins installed in through channels of the housing working part. The peculiar feature of the tool is that end sections of pins are provided with wear-resistant inserts installed with possibility of interacting with wells of the well and bore core; at that, tail ends of cutters are provided with grooves made on external surface, which are aligned with through channels of the housing in order to arrange the pins. At that, diametre of pins from the side of external housing surface is more than diametre of pins from the side of internal housing surface. Pins and through channels made for them in the housing are cone-shaped; at that, vertex of the cone is directed to the tool axis side, and as per the other version, pins and through channels made in the housing for them are of stepped shape; at that, step of the pin of larger diametre is located from the side of external housing surface.

EFFECT: improving attachment reliability of cutters and, at that, providing the required structure of cutting surfaces.

3 cl, 4 dwg