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US 5,205,361 AGranted
Up and down travelling disc valve assembly apparatus
AssigneeCompletion Services, Inc.
InventorsDavid Farley, Kent T. Fink
Life of this patent
Estimating the term…
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AssigneeCompletion Services, Inc.
InventorsDavid Farley, Kent T. Fink
Estimating the term…
A travelling disc valve assembly, comprising a length of tubing lowered down a cased wellbore; a crossover tool secured to the lower end of the length of tubing; a length of wash pipe secured to the lower end of the crossover tool; a disc valve assembly secured to the wash pipe and positioned to a lower circulation position in the well bore; a disc valve secured in a bore of the assembly; a shearing device in the upper portion of the assembly for shearing off the connection between the wash pipe and the disc valve assembly, when the disc valve assembly is in an upper position, providing a way to prevent fluid from flowing into the formation below the disc valve and to prevent production flow to the surface; and a rupturer/disengager to rupture and/or disengage the disc valve at a predetermined time so that the production within the formation is allowed to flow through the assembly bore to the surface.
An improved travelling disc valve assembly for allowing increased production flow to the surface, the assembly comprising:
An improved travelling disc valve assembly for allowing increased production flow to the surface, the assembly comprising:
Dependencies are inferred from the claim text.