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2 244 798

(13)

(51)

IPC

(21) (22)

Application

2003125959/03, 2003-08-27

(24)

Start date

2003-08-27

(22)

Actual filing date

2003-08-27

(45)

Published

2005-01-20

(72)

Inventor

Ishchuk A.G.Gavrilenko M.V.Neupokoev V.G.Bogomolov R.M.Morozov L.V.Mokrousov V.P.Suslikov A.V.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

DRILL BIT Russian patent published in 2005 - IPC

Abstract RU 2244798 C1

FIELD: drilling technique; drill bits for low-speed drilling with hermetically-sealed oil-filled support.

SUBSTANCE: drill bit has body, lugs with compensating oil reservoirs, hermetically sealed covers of reservoirs with locking expanding rings, system of passages for delivery of lubricant to support and hermetically rock rollers provided with rock crushing teeth. Cover of oil reservoir has groove for locking expanding ring and layer of hard alloy on part of its circular surface in sector at angle of 2α=120-150 deg. Which is located above groove for locking expanding ring in immediate proximity with edge of change of surface of lug back to cylindrical surface of hole for reservoir cover.

EFFECT: enhanced stability of support and drill bit as whole; increased sinking; simplified construction; enhanced reliability.

4 cl, 8 dwg

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RU 2 244 798 C1

Authors

Ishchuk A.G.

Gavrilenko M.V.

Neupokoev V.G.

Bogomolov R.M.

Morozov L.V.

Mokrousov V.P.

Suslikov A.V.

Dates

2005-01-20—Published

2003-08-27—Filed