ROCK DESTRUCTION TOOL Russian patent published in 2011 - IPC E21B10/44 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to rock destruction tool for drilling of wells in frozen soils. Rock destruction tool includes housing with sinker, two screw blades and two traverses with disk cutters, which are fixed on the housing. Cutters are installed at one and the same level in horizontal plane symmetrically relative to tool rotation axis; at that, transverse axes of the base of disk cutters, which are located in one vertical plane with tool rotation axis, are inclined towards horizontal surface of bottom hole through an angle of not more than 15°.

EFFECT: decreasing radial runout and torque moment of rock destruction tool and power input of the process.

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