Drilling tool with elastomer seal having graded properties
作者： Terry J. Koltermann , Redd H. Smith
DOI:
关键词: Seal (mechanical) 、 Composite material 、 Materials science 、 Drilling 、 Elastomer 、 Drill
摘要: A subterranean drill tool (11) has a seal gland formed between rotating (17) and static (15) surface. An annular elastomeric (19) is located in the engagement with each of surfaces. property gradient (27) at least part material. The defines that changes from first level surface to second interior seal. material within same chemical composition as rest
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