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2 057 888

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Application

93053484/03, 1993-11-29

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Actual filing date

1993-11-29

(45)

Published

1996-04-10

(72)

Inventor

Alekseev L.A.Taushev R.Z.Akchurin Kh.I.Ishbaev G.G.Karabalin U.S.Kotel'Nikov I.E.Matjushin P.N.Khairov G.B.

(73)

Holder

Konstruktorsko-Tekhnologicheskoe Bjuro Tekhnicheskikh Sredstv Burenija Skvazhin

CORE-DRILL BIT Russian patent published in 1996 - IPC

Abstract RU 2057888 C1

FIELD: borehole drilling. SUBSTANCE: core-drill bit includes frame with washing ducts, coupling with connection thread, blades reinforced with wear-resistant bits and central core-forming part in the form of leading step. Leading step is spring-loaded. EFFECT: improved operational efficiency. 2 dwg

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RU 2 057 888 C1

Authors

Alekseev L.A.

Taushev R.Z.

Akchurin Kh.I.

Ishbaev G.G.

Karabalin U.S.

Kotel'Nikov I.E.

Matjushin P.N.

Khairov G.B.

Dates

1996-04-10—Published

1993-11-29—Filed

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