Sealed downhole equipment and method for fabricating the equipment
AssigneeHalliburton Energy Services, Inc.
InventorsLuke Christopher Downey, Paul Joseph Jones, Nicholas Frederick Budler, Lonnie C. Helms, Todd Anthony Stair
Life of this patent
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Abstract
A method and apparatus for preventing fluid flow and contamination to a cement body includes a resin cap covering an exposed end of the cement body. The cement body may attach an inner sleeve to an outer sleeve. The fluid flowing through the outer sleeve is prevented from contacting the exposed surface by the resin cap. Resin caps at both ends of the cement body along with resin layers along the side may be included. The resin prevents contamination and creation of micro-annuli in the cement body.
Claims14
A method of sealing a downhole tool comprising:
- providing an outer case of the downhole tool having an inner surface, wherein the outer case is configured to be connected to a casing string:
- providing an inner case within the outer case so as to form an annulus between an outer surface of the inner case and the inner surface of the outer case:
- introducing a cementitious material into the annulus so as to affix the outer case to the inner case with a first material the cementitious material, and wherein the cementitious material forms a cement body with an interior surface opposing the outer surface of the inner case, with an exterior surface opposing the inner surface of the outer case, and with an exposed surface;
- forcing a resin into a space between the exterior surface of the cement body and the inner surface of the outer case:
- and
- applying the resin to at least a portion of the exposed exterior surface of the cement body.
A method of sealing a downhole tool comprising:
- providing an outer case of the downhole tool having an inner surface, wherein the outer case is configured to be connected to a casing string;
- providing an inner case within the outer case so as to form an annulus between an outer surface of the inner case and the inner surface of the outer case;
- connecting an outer case to an inner case with a cement body, wherein the cement body has an interior surface opposing the outer surface of the inner case, with an exterior surface opposing the inner surface of the outer case, and with an exposed surface;
- and
- forcing a resin into a space between the exterior surface of the cement body and the inner surface of the outer case so that at least a portion of the exterior surface of the cement body is treated with a resin material.
Dependencies are inferred from the claim text.