Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1979-09-04
1981-02-24
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
308 82, F16J 1534, F16C 3376
Patent
active
042523303
ABSTRACT:
An improved assembly seal acts as a barrier to the drilling fluid, pulverized cuttings and other materials in a borehole preventing the materials from entering the bearing area of a rolling cone cutter earth boring bit and retaining lubricant within the bearing area. The rolling cone cutter is rotatably mounted on a cantilevered bearing pin extending from the body of the bit. A symmetrical seal assembly is positioned between the cutter and bearing pin. The seal assembly is the same on both ends and can rotate against either the rotating cutter or stationary bearing pin. The seal assembly provides a metal-to-metal seal which is resistant to entry of abrasives and also provides a rubber-to-metal seal that provides an initial positive seal for filling and testing. The seal assembly includes a first annular rigid ring and a matching second annular rigid ring positioned between said bearing pin and said rolling cone cutter. An annular rubber ring with an extended lip on each end is located between the matching metal seal rings.
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Dresser Industries Inc.
Scott Eddie E.
Smith Robert I.
Winans Fred A.
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