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2 029 849

(13)

C1

(51)

IPC

(21) (22)

Application

5026355/03, 1991-10-29

(22)

Actual filing date

1991-10-29

(45)

Published

1995-02-27

(72)

Inventor

Tujakbaev Negmet Tujakbaevich[Kz]Fedorov Boris Vladimirovich[Kz]Mendybaev Tokhtamys Nusupkalievich[Kz]Shakenov Oral Kabeshovich[Kz]

(73)

Holder

Kazakhskij Politekhnicheskij Institut

DIAMOND DRILL BIT Russian patent published in 1995 - IPC

Abstract RU 2029849 C1

FIELD: hard rock drilling. SUBSTANCE: faces of diamond-bearing sectors are made in the form of screw-like surface interrupted by washing passages. Pitch of the screw surface corresponds to the depth of crushing zone while introducing diamond grains. Faces of smaller height are used as the front faces of the sectors. EFFECT: high- speed drilling. 4 dwg

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RU 2 029 849 C1

Authors

Tujakbaev Negmet Tujakbaevich[Kz]

Fedorov Boris Vladimirovich[Kz]

Mendybaev Tokhtamys Nusupkalievich[Kz]

Shakenov Oral Kabeshovich[Kz]

Dates

1995-02-27—Published

1991-10-29—Filed

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