Repairing wellbore cement structures and related compositions
AssigneeSaudi Arabian Oil Company
InventorsAshok Santra, Arthur Hale
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Abstract
A self-healing cement structure may be used for repairing defects. An example method of using such a cement structure includes: providing a cement structure in a wellbore, wherein the cement structure includes: a cement and elastomer particles at 1% by weight of the cement (bwoc) to 25% bwoc; applying heat to the cement structure to heat at least a portion of the elastomer particles above a melting point of an elastomer of the elastomer particles to cause at least a portion of the elastomer to melt and infiltrate into a defect in the cement structure; and allowing the elastomer to cool below the melting point of the elastomer to yield a repaired cement structure.
Claims15
A method comprising:
- pumping a cement slurry to a location within a wellbore, wherein the cement slurry comprises:
- a cement precursor material, water at 40% by weight of the cement (bwoc) to 200% bwoc, and 1% bwoc to 25% bwoc of elastomer particles, and wherein the location has a static temperature that is less than a melting point of an elastomer of the elastomer particles;
- and
- curing the cement slurry to form a cement structure at the location in the wellbore wherein the heat within the wellbore heats at least a portion of the elastomer particles above a melting point of an elastomer of the elastomer particles to cause at least a portion of the elastomer to melt and infiltrate into a defect in the cement structure.
Dependencies are inferred from the claim text.