BLADE BIT Russian patent published in 2019 - IPC E21B10/60 E21B7/18 

FIELD: soil or rock drilling.

SUBSTANCE: invention relates to drill bits designed for drilling of interlayers of rock of different strength, separating beds of loose low-cemented ores and their conversion into pulp at well hydraulic extraction. Blade bit consists of a housing with channels for supply of flushing liquid to the well bottom and blades reinforced with rock-breaking elements, the main supply channel of the housing and jet nozzles. Bit housing is made of spudding and drilling parts, spudding part is made in form of cutters with advance in axial direction, main fluid supply channel of the housing is connected to two channels equipped with mounting seats for jet nozzles made replaceable. Between the drilling part and the non-rotating part of the bit housing there is a bushing out of antifriction material retained on the housing by means of a connecting nut, which makes it possible to create on the bit a torque moment relative to the bit rotation axis.

EFFECT: creation of torque moment on bit, allowing to drill interlayers of rocks of medium fortress.

1 cl, 2 dwg