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(19)

(11)

2 007 541

(13)

(51)

IPC

(21) (22)

Application

4937054/03, 1991-05-20

(22)

Actual filing date

1991-05-20

(45)

Published

1994-02-15

(72)

Inventor

Chikhotkin V.F.Chikhotkin F.I.Zhigunov Kh.Kh.Kuashev V.B.Sakhtueva M.T.Bobrovskij S.A.

(73)

Holder

Chikhotkin Viktor Fedorovich

DIAMOND DRILL BIT Russian patent published in 1994 - IPC

Abstract RU 2007541 C1

FIELD: borehole survey. SUBSTANCE: diamond drill bit has body and matrix. Matrix is divided with flushing grooves into sectors with alternating comb and flat working faces. If numbers of comb and flat sectors are equal then hardness of comb sectors is greater than that of flat ones. If number of comb sectors exceeds that of flat ones then hardness of flat sectors is higher than hardness of comb sectors. EFFECT: increased efficiency. 3 dwg

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RU 2 007 541 C1

Authors

Chikhotkin V.F.

Chikhotkin F.I.

Zhigunov Kh.Kh.

Kuashev V.B.

Sakhtueva M.T.

Bobrovskij S.A.

Dates

1994-02-15—Published

1991-05-20—Filed