Axial compression positive rock bit seal

Details Axial compression positive rock bit seal Axial compression positive rock bit seal

1979-09-12

1981-07-07

Footland, Lenard A.

Cutlery

308 361, F16C 2100

Patent

active

042771099

ABSTRACT:
A sealing system provides a metal-to-metal barrier to the drilling fluid, pulverized cuttings and other materials in the borehole preventing the materials from entering the bearing area of an earth boring bit and a positive elastomer seal retains lubricant inside the bearing area. The body of the bit includes a bearing pin and a rolling cone cutter is mounted to rotate about the bearing pin. A sealing surface is provided on the bit body. An annular metal seal ring is positioned around the bearing pin adjacent the sealing surface. An elastomeric ring is positioned around the bearing pin and compressed or deformed axially to urge the metal seal ring into sealing engagement with the sealing surface. A lip projects from the elastomeric ring and contacts the sealing surface to provide a positive initial seal for filling and testing.

REFERENCES:
patent: 3529840 (1970-09-01), Durham et al.
patent: 3761145 (1973-09-01), Schumacher
patent: 4179003 (1979-12-01), Cooper et al.

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