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2 023 854

(13)

C1

(51)

IPC

(21) (22)

Application

4908416/03, 1991-02-05

(22)

Actual filing date

1991-02-05

(45)

Published

1994-11-30

(72)

Inventor

Ioannesjan R.A.

(73)

Holder

Vserossijskij Nauchno-Issledovatel'Skij Institut Burovoj Tekhniki

PLANETARY DRILLING BIT Russian patent published in 1994 - IPC

Abstract RU 2023854 C1

FIELD: reactive turbodrilling. SUBSTANCE: rolling cutters 3 have one rim 4 and calibrating pins 5. EFFECT: higher mechanical drilling speed and footage per run. 1 dwg

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RU 2 023 854 C1

Authors

Ioannesjan R.A.

Dates

1994-11-30—Published

1991-02-05—Filed

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