DRILLING TWO-ROLLER BIT Russian patent published in 2018 - IPC E21B10/20

Abstract RU 2658957 C1

FIELD: drilling of soil or rock.

SUBSTANCE: invention relates to drilling equipment, namely, a rock cutter type rock cutting tool. Drilling two-roller bit contains paws with trunnions, on which rolls are mounted by means of a V-shaped lock. Bit rollers are made with different diameters. Roller with a smaller diameter is installed eccentrically. Amount of eccentricity is 0.95…1.05 (R₁…R₂), where R₁ and R₂ – respectively radii of large and small rollers.

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

1 cl, 2 dwg

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RU 2 658 957 C1

Authors

Serikov Dmitrij Yurevich

Dates

2018-06-26—Published

2017-10-10—Filed