ROLLER BIT Russian patent published in 2015 - IPC E21B10/18

Abstract RU 2555851 C1

FIELD: process engineering.

SUBSTANCE: invention relates to rock crushers, primarily, drill bits intended for drilling with the use of central flushing assembly. Drill bit comprises body with central stepped channel, cutters secured at bit legs and pipe made of resilient material arranged in said central channel. Said resilient pipe in cross-wise direction is composed of two circular sectors their inner surface feature different roughness.

EFFECT: higher efficiency of drilling.

2 dwg

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RU 2 555 851 C1

Authors

Kremlev Vitalij Igorevich

Panin Nikolaj Mitrofanovich

Dates

2015-07-10—Published

2014-06-11—Filed