SINGLE-ROLLER BIT Russian patent published in 2019 - IPC E21B10/22 

FIELD: drilling equipment.

SUBSTANCE: invention relates to drilling equipment, namely, a rock cutting tool of roller type. Single-roller bit comprises a body with an inclined trunnion, on which a rolling cutter is mounted on the external surface by means of a bearing and a locking pin. Roller housing is made along radius, and locking pin is located in cutter housing radial hole and is made in form of rod with two eccentrically arranged steps, outer end of which is reinforced with wear-resistant inserts and is made in form of part of sphere with radius equal to radius of cutter housing. Inner surface of radial hole of cutter housing, in which lock pin is located, is congruent to two eccentrically located steps of locking pin.

EFFECT: technical result is higher efficiency of drilling bit by improving reliability of cutter roller.

1 cl, 1 dwg