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2 019 668

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IPC

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Application

4874086/03, 1990-10-16

(22)

Actual filing date

1990-10-16

(45)

Published

1994-09-15

(72)

Inventor

Кarpukhin Ju.V.Вogomolov R.М.Кondrashov R.Ju.Тorgashov А.V.Loginov А.А.Nazarov А.М.Вudin V.Р.

(73)

Holder

Spetsial'Noe Konstruktorskoe Bjuro Po Dolotam Samarskogo Dolotnogo Zavoda

DRILL BIT Russian patent published in 1994 - IPC

Abstract RU 2019668 C1

FIELD: drilling tools. SUBSTANCE: sectional areas of water courses 4-9 are proportional to areas of circular sections which are overlapped by them on plane perpendicular drill bit axis and tangent to lower point of cutting structure 2 in compliance with relation given in invention description. EFFECT: higher efficiency. 2 dwg

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RU 2 019 668 C1

Authors

Кarpukhin Ju.V.

Вogomolov R.М.

Кondrashov R.Ju.

Тorgashov А.V.

Loginov А.А.

Nazarov А.М.

Вudin V.Р.

Dates

1994-09-15—Published

1990-10-16—Filed

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