Modified cement plug and methods of use
OwnerLyle Launinventor
Life of this patent
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Abstract
An improved wiper plug and methods of using the plug during casing and cementing operations within a subterranean wellbore are provided. The present plugs may pre-loaded with at least one engineered material and operative to release the material over time at a target location within the wellbore, such release serving to enhance the degradation of dissolvable components within the plugs and/or within the casing string, and/or to alter the chemical properties of the wellbore environment.
Claims19
A wiper plug for use in wiping the inner surface of a casing string positioned within a subterranean wellbore, the plug comprising:
- at least one tubular body forming a longitudinal bore extending therethrough, the longitudinal bore being temporarily sealed by at least one dissolvable disc to form a chamber for receiving and containing at least one engineered material;
- at least one annular wiper fin mounted to the tubular body and extending radially outwardly therefrom to engage the inner surface of the casing string, and
- at least one engineered material received within the at least one chamber for controllably degrading the at least one dissolvable disc, releasing the at least one engineered material into the longitudinal bore to further controllably degrade at least one dissolvable component positioned within the wellbore.
A method of delivering at least one engineered material to a target location in a casing string positioned in a subterranean wellbore, the method comprising:
- providing at least one wiper plug having
- a body forming a longitudinal bore, the longitudinal bore forming at least one chamber for receiving and containing the at least one engineered material, and
- at least one dissolvable disc,
- loading the chamber of the at least one wiper plug with the at least one engineered material,
- launching the at least one wiper plug into the casing string and allowing the at least one wiper plug to wipe the casing string as the at least one wiper plug passes therethrough,
- landing and securing the wiper plug at or near the target location, and
- allowing the at least one engineered material to degrade the at least one dissolvable disc and controllably release the at least one engineered material into the wellbore,
- wherein the release of the at least one engineered material further controllably degrades at least one dissolvable component positioned within the wellbore.
Dependencies are inferred from the claim text.