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2 477 780

(13)

(51)

IPC

E21B10/573(2006-01-01)

E21C35/197(2006-01-01)

(21) (22)

Application

2009106308/03, 2009-02-24

(24)

Start date

2009-02-24

(22)

Actual filing date

2009-02-24

(45)

Published

2013-03-20

(72)

Inventor

Dmitriev Vladimir TrofimovichBojarskikh Gennadij AlekseevichDmitriev Dmitrij SergeevichBojarskikh Il'Ja Gennad'EvichMurashov Vadim Vladimirovich

(73)

Holder

Dmitriev Vladimir TrofimovichBojarskikh Gennadij AlekseevichDmitriev Dmitrij SergeevichBojarskikh Il'Ja Gennad'EvichMurashov Vadim Vladimirovich

METHOD FOR ATTACHMENT OF ROCK DESTROYING INSERTS OF DRILLING TOOLS AND WORKING ELEMENTS OF SINKING MACHINES Russian patent published in 2013 - IPC E21B10/573 E21C35/197

Abstract RU 2477780 C2

FIELD: mining.

SUBSTANCE: method for attachment of rock destroying inserts in working element of drilling tools and sinking machines involves inserts location in bushes made of flexible material that are pressed-in into working element of drilling tool and sinking machines, note that there are longitudinal channels on bushes external surface for air supply and distribution of stresses during pressing-in.

EFFECT: increase of error-free running time of working elements.

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RU 2 477 780 C2

Authors

Dmitriev Vladimir Trofimovich

Bojarskikh Gennadij Alekseevich

Dmitriev Dmitrij Sergeevich

Bojarskikh Il'Ja Gennad'Evich

Murashov Vadim Vladimirovich

Dates

2013-03-20—Published

2009-02-24—Filed