DRILL BIT Russian patent published in 2001 - IPC

Abstract RU 2164284 C2

FIELD: drilling equipment, specifically, cone drill bits. SUBSTANCE: drill bit has a valve unit in nipple part, separable packings-nozzles in blow- through conduits and filters preventing water and slime from getting cooling conduits of supports. Valve unit has seat with central hole and sealing coat over all sides fixed immobile on wall of nipple, valve washer with holes and return spring fixing shut-off position of valve unit. Drill bit with simple valve unit reliable in operation provides for sharp increase of sinking per drill bit and for mechanical speed of drilling in water encroached holes. EFFECT: sharp increase of sinking per drill bit. 2 cl, 1 dwg

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RU 2 164 284 C2

Authors

Ishchuk A.G.

Bogomolov R.M.

Morozov L.V.

Mokrousov V.P.

Krylov S.M.

Kruglov V.V.

Dates

2001-03-20—Published

1999-04-22—Filed