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2 078 191

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C1

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IPC

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Application

94018208/03, 1994-05-18

(22)

Actual filing date

1994-05-18

(45)

Published

1997-04-27

(72)

Inventor

Stepanov R.V.Mavljutov M.R.Matjushin P.N.Alekseev L.A.Baluta A.G.Karasev V.N.Zaripov I.A.

(73)

Holder

Ufimskij Gosudarstvennyj Neftjanoj Tekhnicheskij Universitet

DRILL BIT Russian patent published in 1997 - IPC

Abstract RU 2078191 C1

FIELD: drag drill bits. SUBSTANCE: drill bit has body, body components with rock cutting members and flexible branch pipe attached with its upper end coaxially to body. Drill bit has deflector in form of hemisphere and drill body components are made in form of wings. Deflector is rigidly secured to wings coaxially to the body under the lower end of flexible branch pipe for formation of gap between the lower end of flexible branch pipe and hemispherical surface of deflector. EFFECT: higher efficiency. 2 dwg

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RU 2 078 191 C1

Authors

Stepanov R.V.

Mavljutov M.R.

Matjushin P.N.

Alekseev L.A.

Baluta A.G.

Karasev V.N.

Zaripov I.A.

Dates

1997-04-27—Published

1994-05-18—Filed

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