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US 10,150,904 B1Granted
Nano zeolite cement additive and methods of use
AssigneeKing Fahd University of Petroleum and Minerals
InventorsMuhammad Kalimur Rahman, Mirza Talha Baig, Abdulaziz Al-Majed
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Abstract
The present invention discusses methods for making a cement composition comprising a nanoparticle zeolite. The addition of the nanoparticle zeolite may provide enhanced compressive and tensile strengths, improved rheology, and a change to the cement microstructure. These effects may improve the cement's use as a cement sheath in drilling operations and under high pressure and high temperature (HPHT) conditions.
Claims20
A method of making a cured cement material, comprising:
- mixing
- a hydraulic cement;
- water and/or brine in an amount of 40-50% by weight of the hydraulic cement;
- and
- 0.5-4 wt % zeolite nanoparticles by weight of the hydraulic cement to form a wet cement slurry;
- and
- curing the wet cement slurry to produce the cured cement material,
- wherein the cured cement material comprises zeolite clusters having an average cluster diameter of 1-12 μm,
- wherein the zeolite nanoparticles have an average diameter of 40-100 nm,
- wherein the cured cement material is porous, with pores having an average diameter of 1-12 μm, and
- wherein a subset of the zeolite clusters is located within the pores.
8 more elements
Dependencies are inferred from the claim text.