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2 208 121

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Application

2001119884/03, 2001-07-17

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Start date

2001-07-17

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Actual filing date

2001-07-17

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Published

2003-07-10

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Inventor

Butkin V.D.Gilev A.V.Chesnokov V.T.Demchenko I.I.Ryzhov S.V.

(73)

Holder

Butkin Vladimir DmitrievichGilev Anatolij VladimirovichChesnokov Valerij TimofeevichDemchenko Igor' IvanovichRyzhov Sergej VladimirovichKrasnojarskaja Gosudarstvennaja Akademija Tsvetnykh Metallov I Zolota

METHOD OF RECONDITIONING OF WORN-OUT ROLLER-CUTTER DRILLING BITS INTO DRAG DRILLING BITS Russian patent published in 2003 - IPC

Abstract RU 2208121 C2

FIELD: mining industry, particularly, methods of reuse of worn- out roller-cutter drilling bits. SUBSTANCE: method includes rejecting of going- out of service drilling bits, their washing in kerosene, cleaning and separation of roller-cutters. Legs together with roller-cutters are cut-off perpendicular to bit axis, at base. Milled on formed surface is radial recess into which two different in height conical stepped plates are installed crosswise. High plate base is made in compliance with shape and depth of radial recess and fixed. EFFECT: reduced cost of drilling bit reconditioning. 3 cl, 5 dwg

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RU 2 208 121 C2

Authors

Butkin V.D.

Gilev A.V.

Chesnokov V.T.

Demchenko I.I.

Ryzhov S.V.

Dates

2003-07-10—Published

2001-07-17—Filed

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