F - Mech Eng,Light,Heat,Weapons – 16 – C
Patent
F - Mech Eng,Light,Heat,Weapons
16
C
F16C 41/02 (2006.01) E21B 4/00 (2006.01) F16C 32/06 (2006.01)
Patent
CA 2376334
A high capacity thrust bearing is disclosed for use in a tubular drilling string to support axial loads resulting from upward or downward jarring forces. The thrust bearing comprises an inner mandrel and an outer housing. A mandrel pressure chamber string and a housing pressure chamber string are journalled between the mandrel and the housing. The mandrel pressure chamber string and the housing chamber string are arranged to form a number of individual pressure chambers. Alternating pressure chambers contain high pressure fluid or low pressure fluid, thereby forming a repeating pressure differential between adjacent chambers. As loads are applied axially to the drill string, such as jarring loads, the pressure differential over the surface area of the pressure chambers provides a thrust bearing. The thrust bearing is rotatable by its connection to the drill string.
L'invention concerne un palier de pression s'utilisant dans un train forage tubulaire en vue de soutenir les charges axiales résultant des forces de battage vers le haut ou vers le bas. Ce palier comprend un mandrin interne et un boîtier externe. Un train de chambre de pression du mandrin et un train de chambre de pression du boîtier sont tourillonnées entre le mandrin et le boîtier et disposées pour former plusieurs chambres de pression individuelles. Ces chambres de pression alternatives contiennent du liquide à haute pression ou à basse pression, donnant lieu à un différentiel de pression récurrent entre chambres adjacentes. Lorsqu'on applique des charges au train de forage de manière axiale, telles que des charges de battage, le différentiel de pression sur la surface des chambres de pression constitue un palier de pression. Ce palier est rotatif grâce à sa connexion au train de forage.
Marks & Clerk
Weatherford/lamb Inc.
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