ROLLER BIT Russian patent published in 2014 - IPC E21B10/16

Abstract RU 2515795 C2

FIELD: process engineering.

SUBSTANCE: invention relates to drill bits. Roller bit comprises multicone rolling cutters with working surfaces of roller bit composed by several generating lines of conical surfaces. Working surface of every roller bit teeth at contact with bottom hole is perpendicular to bit axis to make stepped surface between bit teeth.

EFFECT: higher drilling rate.

2 dwg

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RU 2 515 795 C2

Authors

Sinev Stanislav Vasil'Evich

Dates

2014-05-20—Published

2012-03-12—Filed