ROLLING DRILLING BIT Russian patent published in 2014 - IPC E21B10/08 E21B10/22 

Abstract RU 2508440 C1

FIELD: mining.

SUBSTANCE: rolling drilling bit includes a housing with an inclined trunnion provided with an annular groove in the middle part, and a rolling cutter installed on the trunnion by means of latch pins and sliding bearings and provided with running paths, the length of which is bigger than that of a contact zone of the trunnion with the sliding bearings. The end surface of the annular groove of the trunnion on the side of its base is provided with radial slots for interaction with end sections of latch pins. Length of arc between latch pins corresponds to the length of arc between radial slots on the end surface of the annular groove of the trunnion, and depth of radial slots does not exceed radius of end sections of latch pins. Latch pins can be of a stepped shape; steps of the larger diameter are equipped with wear-resistant inserts.

EFFECT: improving a bit operating efficiency.

2 cl, 4 dwg

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RU 2 508 440 C1

Authors

Serikov Dmitrij Jur'Evich

Jasashin Vitalij Anatol'Evich

Bogomolov Rodion Mikhajlovich

Panin Nikolaj Mitrofanovich

Kremlev Vitalij Igorevich

Dates

2014-02-27Published

2012-11-27Filed