Shale diverting means for a sealed bearing drill bit

Details Shale diverting means for a sealed bearing drill bit Shale diverting means for a sealed bearing drill bit

1990-09-17

1991-10-15

Neuder, William P.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

384 94, E21B 1022

Patent

active

050566105

ABSTRACT:
Sealed bearing rotary cone drill bits are subject to seal wear from detritus or debris generated during operation of the drill bit in a borehole. The debris invades the seal gland area resulting in premature cone bearing failure. A shale burn plug secured in the leg back face and positioned between the base of the rotary cone and the leg back face has a shale or detritus diverting ridge formed in the face of the plug. Additionally, the burn plug is energized to urge the ridged face of the burn plug against the base of the rotary cone; the ridge being radially oriented to divert debris away from the seal gland.

REFERENCES:
patent: 1641261 (1927-09-01), Fletcher
patent: 2260487 (1941-10-01), Scott
patent: 2960313 (1960-11-01), Goodwin
patent: 3013621 (1961-12-01), Kinnear
patent: 3921735 (1975-11-01), Dysart
patent: 4688651 (1987-08-01), Dysart

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