DRILL BIT ROLLER CUTTER Russian patent published in 2017 - IPC E21B10/24 E21B10/25

Abstract RU 2612171 C1

FIELD: mining.

SUBSTANCE: invention relates to mining industry, namely, to drill bits roller cutters for large diameter wells drilling for piles, rocks development. Drill bit roller cutter includes housing, axis, installed in housing on bearings, cover, provided with spring-loaded piston relative to it with formation of variable-volume chamber, formed between piston and bearing, wherein piston and housing are equipped with pair of sealing elements. At point of conjugation with axis housing and cover are equipped with additional sealing elements, made from porous material.

EFFECT: technical result consists in increasing of roller cutter service life.

5 cl, 9 dwg

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RU 2 612 171 C1

Authors

Dates

2017-03-02—Published

2015-09-09—Filed