Rotary earth boring drill bit with centrifugal foreign particle

Details Rotary earth boring drill bit with centrifugal foreign particle Rotary earth boring drill bit with centrifugal foreign particle

1979-03-15

1980-09-23

Pate, III, William F.

Boring or penetrating the earth

With storage means for bit lubricant carried by bit or shaft

175313, 175315, 175337, 175340, 175372, E21B 935

Patent

active

042237491

ABSTRACT:
A drilling bit for drilling earthen material such as an oil well rotary cone drilling bit, which includes means for preventing foreign particles such as sand, rock cuttings, etc., from reaching the rotational bearings of the bit cones. This end result is principally achieved by means of a centrifugal slinger disc or wall which is positioned in external concentricity with the drill bit cone bearing, and operates to drive granular particles away from the bearings, thereby preventing such particles from reaching these bearing surfaces. The granular particles are driven by the slinger action through a series of apertures forming a channel running out to a peripheral region of the bit cones. A channel continuation is also provided for lubricating fluid, which may comprise ambient water or oil placed in chambers surrounding the bearings, this channel providing access for such lubricating fluid inwardly to the bit cone bearings. A disc-shaped wall member is provided opposite the slinger disc to minimize the escape of oil from the chambers when the bit is stationary. A ring member carrying a plurality of curved vanes, this ring member being externally concentric with the supporting shaft of the cone and located near the outer periphery of the bit cone may also be employed to prevent larger foreign particles, such as cuttings, from entering into the region of said slinger.

REFERENCES:
patent: 4049066 (1977-09-01), Richey
patent: 4091988 (1978-05-01), Bodine
patent: 4167219 (1977-09-01), McQueen

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