Cement slurries, cured cement and methods of making and use of these
AssigneeSaudi Arabian Oil Company
InventorsSimone Musso, Sivaprakash Shanmugam
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Abstract
Cement slurries, cured cements, and methods of making cured cement and methods of using cement slurries are provided. The cement slurries have, among other attributes, improved expanding capabilities and may be used, for instance, in the oil and gas drilling industry. The cement slurry comprises water, a cement precursor material, and an expanding agent. The expanding agent comprising at least a poly(lactic acid)-metal oxide nanocomposite. The metal oxide comprises MgO, CaO, or both, and the poly(lactic acid) comprises a carboxylic acid terminal group.
Claims22
A cement slurry comprising:
- water;
- a cement precursor material;
- and
- an expanding agent comprising at least a poly(lactic acid)-metal oxide nanocomposite, where the metal oxide comprises MgO, CaO, or both, and the poly(lactic acid) comprises a carboxylic acid terminal group.
A method of cementing a casing in a wellbore, the method comprising:
- pumping a cement slurry into an annulus between the casing and the wellbore, where the cement slurry comprises:
- water;
- a cement precursor material;
- and an expanding agent comprising at least a poly(lactic acid)-metal oxide nanocomposite, where the metal oxide comprises MgO, CaO, or both, and the poly(lactic acid) comprises a carboxylic acid terminal group;
- and
- curing the cement slurry to cement the casing in the wellbore.
A method of producing a poly(lactic acid)-metal oxide nanocomposite comprising:
- reacting poly(lactic acid) with MgO nanocomposites, CaO nanocomposites, or both;
- and
- reacting the poly(lactic acid) with an anhydride to add a carboxylic acid terminal group to the poly(lactic acid), thereby forming the poly(lactic acid)-metal oxide nanocomposite.
Dependencies are inferred from the claim text.