Crack-resistant cement composition
AssigneeHalliburton Energy Services, Inc.
InventorsVandana Neeraj Pandey, Dibyadarshani Senapati, Abhimanyu P. Deshpande, Rahul Chandrakant Patil
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Abstract
A cement composition for use in a well that penetrates a subterranean formation comprising: cement; water; and an additive comprising zirconium dioxide, wherein at least a portion of the zirconium dioxide is in a metastable tetragonal phase, and wherein some or all of the zirconium dioxide that is in the metastable tetragonal phase transforms to a stable monoclinic phase after a stress is applied to the cement composition. The additive also reduces the dimensions of a crack located within the set cement composition. A method of cementing in a subterranean formation comprising: introducing a cement composition into the subterranean formation.
Claims17
A method of cementing in a subterranean formation comprising:
- introducing a cement composition into the subterranean formation, wherein the cement composition comprises:
- (A) cement;
- (B) water;
- and
- (C) an additive comprising zirconium dioxide, wherein at least 60% of the zirconium dioxide is in a metastable tetragonal phase during the step of introducing, and wherein some or all of the zirconium dioxide that is in the metastable tetragonal phase transforms to a stable monoclinic phase after a stress is applied to the cement composition;
- allowing or causing to allow the cement composition to set;
- allowing or causing to allow the stress to induce a crack in the set cement composition;
- wherein the stress further induces at least a portion of the zirconium dioxide that is in the metastable tetragonal phase to transform to the stable monoclinic phase;
- wherein this transformation reduces the size of at least one dimension of the crack.
Dependencies are inferred from the claim text.