ROCK DESTRUCTION TOOL Russian patent published in 2015 - IPC E21B10/46 

FIELD: mining.

SUBSTANCE: rock destruction tool contains a tool casing, having central line and intended to secure to the drilling block with possibility to accept the impact load from the drilling block along the central line, and rock destruction rods secured in rod holes drilled in distant end part of the tool casing. The tool casing aligned relatively to the central line is made with possibility of forward movement in the direction towards the distant end face along the central line. One of the rock destruction rods secured to the external peripheral part of the distant end face of the tool casing is the rotating rock destruction rod, and is made in such configuration that the build-in part having outside cylindrical shape relatively to the central line is made integrally with part of the cutting edge of the extreme distant end face in the direction towards the central line. The build-in part is inserted in the rod hole, and part of the cutting edge projects beyond the rod hole. The rotating rock destruction rod is made with possibility of rotation around the central line during penetration and locking to exclude sliding towards the distant end face along the central line.

EFFECT: assurance of effective penetration, and increased service life of the tool.

11 cl, 12 dwg