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Threaded joint with resilient seal ring

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 162 KB
Volume: 2009
Category: Article
ISSN: 1350-4789
DOI: 10.1016/s1350-4789(09)70286-7

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This patent describes the manufacture of a seal with graded properties that may be used as the bearing seal in a down-hole rock bit. A property gradient is formed in a seal, or a section of the seal, from the exterior surface inwards without changing the seal composition.