BORE CONE BIT Russian patent published in 2009 - IPC E21B10/16 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to boring equipment and can be implemented at fabrication of boring tool. The bore bit with hard alloy teeth arranged of periphery rows of a roller cutter has a cylinder base and a working flat symmetrical head. From one side the head presents a pointed part formed by two flat or concave planes. From another side it presents a spherical conic part formed with a sphere at the top and a cone with smooth transitions of rounding. The pointed parts of teeth at the boundary of cross of the main and reverse cones of the roller cutters of the bit are directed so, that planes of symmetry of teeth are arranged one to another at an angle α within the range in the limits from 0° to 180°, where n is number of teeth on the periphery crown of the roller cutter.

EFFECT: upgraded efficiency of hard alloy fixtures of roller cutters of bore bits.

42 dwg