Cement composition containing an additive of a pozzolan and a strength retrogression inhibitor
First Claim
1. A cement composition comprising:
- cement;
water; and
an additive,wherein the additive is a pozzolan and a strength-retrogression inhibitor,wherein the additive is a red brick powder and comprises at least the compounds silicon dioxide (SiO2), iron III oxide (Fe2O3), and aluminum oxide (Al2O3), wherein the SiO2 is in a concentration in the range of about 40% to about 60% of the total chemical composition of the additive;
the Fe2O3 is in a concentration in the range of about 15% to about 25% of the total chemical composition of the additive; and
the Al2O3 is in a concentration in the range of about 5% to about 15% of the total chemical composition of the additive, andwherein a mixture consisting essentially of;
the additive;
water; and
a source of calcium develops a compressive strength of at least 500 psi (3.4 MPa) at a time of 24 hours, a temperature of 190°
F. (88°
C.), and a pressure of 3,000 psi (20.7 MPa).
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Accused Products
Abstract
A cement composition comprises: cement; water; and an additive, wherein the additive is a pozzolan and a strength-retrogression inhibitor, and wherein a mixture consisting essentially of: the additive; water; and a source of calcium develops a compressive strength of at least 500 psi at a time of 24 hours, a temperature of 190° F., and a pressure of 3,000 psi. A method of cementing in a subterranean formation comprises: introducing the cement composition into the subterranean formation and allowing the cement composition to set. The compressive strength of the test cement composition consisting essentially of: the cement; the water; and the additive at a final time of 72 hours has a percent change greater than −5% from the compressive strength of the test cement composition at an initial time of 24 hours when tested at a temperature of 300° F. and a pressure of 3,000 psi.
28 Citations
17 Claims
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1. A cement composition comprising:
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cement; water; and an additive, wherein the additive is a pozzolan and a strength-retrogression inhibitor, wherein the additive is a red brick powder and comprises at least the compounds silicon dioxide (SiO2), iron III oxide (Fe2O3), and aluminum oxide (Al2O3), wherein the SiO2 is in a concentration in the range of about 40% to about 60% of the total chemical composition of the additive;
the Fe2O3 is in a concentration in the range of about 15% to about 25% of the total chemical composition of the additive; andthe Al2O3 is in a concentration in the range of about 5% to about 15% of the total chemical composition of the additive, and wherein a mixture consisting essentially of;
the additive;
water; and
a source of calcium develops a compressive strength of at least 500 psi (3.4 MPa) at a time of 24 hours, a temperature of 190°
F. (88°
C.), and a pressure of 3,000 psi (20.7 MPa). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A cement composition comprising:
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cement; water; and an additive, wherein the additive is a pozzolan and a strength-retrogression inhibitor, wherein the additive is a red brick powder and comprises at least the compounds silicon dioxide (SiO2), iron III oxide (Fe2O3), and aluminum oxide (Al2O3), wherein the ratio of SiO2 to Fe2O3 to Al2O3 is in the range of 1;
0.2;
0.2 to 1;
0.35;
0.3, and wherein a mixture consisting essentially of;
the additive;
water; and
a source of calcium develops a compressive strength of at least 500 psi (3.4 MPa) at a time of 24 hours, a temperature of 190°
F. (88°
C.), and a pressure of 3,000 psi (20.7 MPa).
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Specification