Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1984-10-15
1986-09-09
Levy, Stuart S.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
277134, 277207R, 277215, 384 94, 384153, 384477, E21B 1022, F16J 1534, F16C 3374
Patent
active
046103198
ABSTRACT:
A hyrodynamic lubricant sealing element for devices such as rotary cone rock bits, shaft seals and the like which is maintained under sufficient mechanical compression to effect a seal between relatively movable structures. The sealing element defines a sealing surface establishing a seal interface with a relatively movable circular sealing surface and forms a lubricant interface and a contaminant interface at opposite sides thereof. The lubricant interface is of such configuration as to induce a hydrodynamic lubricant wedging activity causing migration of lubricant film in the seal interface from the lubricant interface to the contaminant interface for flushing away any contaminant and for lubrication between the sealing element and sealing surface. The contaminant is of a configuration developing substantially no such hydrodynamic wedging activity at the contaminant interface and yet presenting a scraping edge to remove contaminant material from the sealing surface upon relative axial movement of the sealing surface and sealing element.
REFERENCES:
patent: 3744805 (1973-07-01), Heinrich
patent: 3862762 (1975-01-01), Millsap
patent: 3929340 (1975-12-01), Peisker
patent: 3973781 (1976-08-01), Grorich
patent: 4037673 (1977-07-01), Justman
patent: 4288083 (1981-09-01), Braconier
patent: 4399998 (1983-08-01), Otto
Levy Stuart S.
Werner David
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