Seal assembly for drill bits

Details Seal assembly for drill bits Seal assembly for drill bits

1985-09-16

1986-11-18

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

277 92, 384 94, E21B 1022

Patent

active

046230289

ABSTRACT:
A seal assembly (34) for a roller cutter drill bit (10). Seal assembly (34) has an elastomeric resilient O-ring 44 adjacent one sealing surface and a dynamic elastomeric O-ring (46) adjacent another sealing surface. A rigid carrier (52) is mounted between the O-rings (44, 46) which are unsecured to their associated sealing surfaces. A key (54) on carrier (52) limits rotation of the carrier (52) and static O-ring (46) relative to the associated sealing surface (38).

REFERENCES:
patent: 3397928 (1968-08-01), Galle
patent: 3467448 (1969-09-01), Galle
patent: 3656764 (1972-04-01), Robinson
patent: 3944306 (1976-03-01), Neilson
patent: 4176848 (1979-12-01), Lafuze
patent: 4306727 (1981-12-01), Deane et al.
patent: 4344629 (1982-08-01), Oelke
patent: 4394020 (1983-07-01), Oelke
patent: 4466621 (1984-08-01), Garner et al.
patent: 4466622 (1984-08-01), Deane et al.
patent: 4516641 (1985-05-01), Burr

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