Seal for a joint or juncture – Seal for well apparatus – For below ground apparatus
Patent
1996-10-08
1998-12-01
Knight, Anthony
Seal for a joint or juncture
Seal for well apparatus
For below ground apparatus
277407, 277910, 277944, F16J 1534
Patent
active
058427007
ABSTRACT:
A high performance rock bit journal seal is formed from a composite material comprising an elastomeric material and a nonelastomeric polymeric material. The polymeric material is preferably in the form of fibers woven into a sheet. The elastomeric material includes at least one lubricant additive. The composite seal material comprises a number of repeating sheets of polymeric fabric that are bonded together with the elastomeric material. In one embodiment, the seal includes a body formed entirely from the composite material, in which case both the static and dynamic seal surfaces are the same. In another embodiment, the seal includes a first body portion formed from the composite material, and a remaining body portion formed from a noncomposite elastomeric seal material. Seals formed from the composite seal material display enhanced wear resistance, reduced coefficient of friction, and improved high-temperature stability and endurance when compared to noncomposite seal materials, thereby both extending the useful life of seals formed therefrom formed and of rock bits that employ such seals.
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Cawthorne Chris E.
Denton Robert
Fang Zhigang
Huang Sujian
James Brian A.
Beres John L.
Knight Anthony
Smith International Inc.
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