ROLLING ONE-CONE DRILLING BIT (VERSIONS) Russian patent published in 2018 - IPC E21B10/52 

FIELD: drilling soil or rock.

SUBSTANCE: invention relates to drilling equipment, namely, a rock cutter type rock cutting tool. Single bit drill bit comprises a housing with a central and two lateral channels facing its lateral surface, one of which communicates with the central channel for supplying the washing liquid with respect to the surface of the cutter, and another, made with the possibility of passage of flushing fluid and the resulting core, goes into the tapering part of the outer surface of the housing and communicates with the axial channel of the trunnion, forming one straight channel, in which the axis of the housing is installed core breaker. Trunnion is rigidly connected to the housing and mounted obliquely to the axis of the housing; the roller cutter with arms on its outer surface is rotatably mounted relative to the trunnion by means of a lock bearing. Body in the zone of contact with the upper exit part of the specified straight channel is equipped with working elements in the form of balls, the outer surface of which is reinforced with a wear-resistant material.

EFFECT: technical result consists in improvement of drilling bit operation efficiency.

2 cl, 3 dwg