Completion apparatus and methods for use in wellbores
AssigneeWeatherford/Lamb, Inc.
InventorAlexander MacKay
Life of this patent
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AssigneeWeatherford/Lamb, Inc.
InventorAlexander MacKay
Estimating the term…
An apparatus and methods for preventing the accumulation of unwanted materials in an enlarged inner diameter portion of a casing or housing. In one aspect of the invention, a sleeve is disposed in the housing to isolate an annular area defined by the outer surface sleeve and the wall of the enlarged inner diameter portion. The sleeve prevents unwanted materials from being disposed in the annular area. The sleeve can later be expanded into the enlarged inner diameter portion, removed from the wellbore or destroyed. In another aspect of the invention, the sleeve is provided and disposed to cover the enlarged inner diameter portion. By covering the enlarged inner diameter portion, unwanted material is prevented from accumulating at said portion and from interfering with the expansion of the next casing into said portion to form a monobore. The sleeve can be made from materials that are dissolvable, elastically deformable, or retrievable.
1-5. (canceled)
A tubular assembly for disposal proximate a terminal end of a well tubular string, comprising:
The tubular assembly of claim 1, wherein the fluid filled annular area comprises a fluid selected from a polymer, a gel, a foam and oil.
The tubular assembly of claim 1, wherein the inner sleeve is coupled to the outer tube by an attachment selected from a rivet, a screw and glue.
The tubular assembly of claim 1, wherein the inner sleeve comprises a dissolvable material.
The tubular assembly of claim 1, wherein the inner sleeve comprises a dissolvable material selected from aluminum, zinc, magnesium and carbon fiber.
The tubular assembly of claim 1, wherein at least one recess in the outer tube receives the inner sleeve to couple the inner sleeve to the outer tube.
The tubular assembly of claim 1, wherein the inner sleeve forms a seal with the outer tube to temporarily seal the fluid filled annular area.
The tubular assembly of claim 1, further comprising a nose member directly coupled to the outer tube, wherein the nose member facilitates insertion of the tubular assembly into a well.
The tubular assembly of claim 1, wherein the inner sleeve and the outer tube have solid walls to always prevent fluid communication through the walls.
A method of forming a tubular assembly for disposal proximate a terminal end of a well tubular string, comprising:
Dependencies are inferred from the claim text.