ROLLING DRILLING BIT Russian patent published in 2019 - IPC E21B10/16 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to a tool for drilling wells in oil and gas industry, namely to a rolling drilling bit for drilling hard and alternating softer rocks with them. Bit comprises on peripheral crowns of rolling cutters alternating T-shaped and prismatic teeth with cutting edges of blunting, directed along generatrixes cone cutters. Prismatic peripheral teeth are reinforced on the side of cone reverse cones by hardening stiffening ribs located below the level of the rock crushing vertex face of tooth dullness by a value not less than the value of the average penetration depth of the bit when drilling hard rocks per one its rotation along the face, within the range of values h=1.5–2.5 mm.

EFFECT: high strength and resistance to wear of the bit.

1 cl, 11 dwg