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2 167 258

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IPC

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Application

99110827/03, 1999-05-13

(24)

Start date

1999-05-13

(22)

Actual filing date

1999-05-13

(45)

Published

2001-05-20

(72)

Inventor

Fedotov V.P.Simisinov I.L.Soldatov E.P.Zakirov N.N.Borodin I.N.Borodin L.I.

(73)

Holder

Zao Tsentr Nauchno-Tekhnicheskikh Uslug Mashin"

CONE DRILL BIT Russian patent published in 2001 - IPC

Abstract RU 2167258 C2

FIELD: drilling tools intended to drill deep wells to produce oil and gas. SUBSTANCE: cone drill bit has lugs with pivots carrying rock roller bits, bearings, units sealing rock roller bits, oil vessels with system of lubrication conduits. There are provided technological holes for release of air from air-tight space between rock roller bit and pivot while it is stuffed with lubricant and lockpins to seal technological holes. Oil vessels are fitted with differential pistons for effective feed of lubricant into friction zone during operation of drill bit on face. EFFECT: prolonged service life of cone drill bit. 1 dwg

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RU 2 167 258 C2

Authors

Fedotov V.P.

Simisinov I.L.

Soldatov E.P.

Zakirov N.N.

Borodin I.N.

Borodin L.I.

Dates

2001-05-20—Published

1999-05-13—Filed

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