Cement slurries, cured cement and methods of making and use of these
AssigneeSaudi Arabian Oil Company
InventorB. Raghava Reddy
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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 elasticity and self-healing properties and may be used, for instance, in the oil and gas drilling industry. The cement slurry comprises water, a cement precursor material, and a block copolymer composition. The block copolymer composition has at least one copolymer backbone, with each copolymer backbone comprising at least two hard segments. Furthermore, a soft segment is disposed between the at least two hard segments. The copolymer backbone has at least one anhydride group grafted onto the soft segment, and the anhydride group is crosslinked by an aminosilane crosslinker.
Claims20
A method of producing a cement slurry, the method comprising:
- mixing water with a cement precursor and a block copolymer to form a cement slurry, where:
- the block copolymer composition has at least one copolymer backbone, each copolymer backbone comprises at least two hard segments, and a soft segment disposed between the at least two hard segments, in which the copolymer backbone has at least one anhydride group grafted onto the soft segment, and in which the anhydride group is crosslinked by an aminosilane crosslinker.
Dependencies are inferred from the claim text.