ROLLER BIT BEARING Russian patent published in 1994 - IPC

Abstract RU 2019671 C1

FIELD: well drilling. SUBSTANCE: groove is 8 provided in plain bearings 4 of lower part of cone pin in zone of contact of cone pin with concave surface of cone 2 during bearing operation. Symmetry plane of groove 8 runs through cone pin axis. Value of area of contact surfaces of plain bearings during bearing operation is determined from the relation given in invention description. EFFECT: higher efficiency. 2 cl, 3 dwg

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RU 2 019 671 C1

Authors

Gerasimov А.G.

Вogomolov R.М.

Тorgashov А.V.

Dates

1994-09-15—Published

1991-01-02—Filed