Downhole assembly for selectively sealing off a wellbore
AssigneeNine Energy Service, Inc.
InventorW. Lynn Frazier
Life of this patent
Estimating the term…
Abstract
Downhole assemblies and methods for isolating a wellbore. A downhole tool can include a body having a bore or flowpath formed therethrough, and one or more sealing members disposed therein. The one or more sealing members can include an annular base and a curved surface having an upper face and a lower face, wherein one or more first radii define the upper face, and one or more second radii define the lower face, and wherein, at any point on the curved surface, the first radius is greater than the second radius. The sealing members can be disposed within the bore of the tool using one or more annular sealing devices disposed about the one or more sealing members.
Claims26
An assembly for sealing off a bore of a downhole tool, comprising:
- a curved surface having an outer face and an inner face, wherein the outer face has a convex configuration and the inner face has a concave configuration, the outer face and the inner face of the curved surface having a distance therebetween;
- an annular base depending from the curved surface, the annular base comprising a cylindrical inner surface and a cylindrical outer surface having a distance therebetween, the distance between the cylindrical inner surface and the cylindrical outer surface of the annular base being the same as the distance between the outer face and the inner face of the curved surface;
- and
- a first circular seal contacting an exterior surface of the annular base, the first seal configured to form a fluid barrier between at least the annular base and the first seal when the assembly is mounted in a downhole tool.
An assembly for sealing off a bore of a downhole tool, comprising:
- a curved surface having an outer face and an inner face, wherein the outer face has a convex configuration and the inner surface has a concave configuration, the outer face having a perimeter where the convex configuration ends and a distance between opposing sides of the perimeter;
- an annular base depending from the perimeter of the outer face, the annular base having an outer diameter and an inner bore, the outer diameter of the annular base being substantially the same as the distance between the opposing sides of the perimeter such that the annular base is within a perpendicular projection of the perimeter of the curved surface;
- and
- a first circular seal contacting an exterior surface of the annular base, the first seal configured to form a fluid barrier between at least the annular base and the first seal when mounted in a downhole tool.
Dependencies are inferred from the claim text.