US2005034864A1PendingUtilityA1
Cement compositions with improved fluid loss characteristics and methods of cementing in surface and subterranean applications
Priority: Jun 27, 2003Filed: Sep 20, 2004Published: Feb 17, 2005
Est. expiryJun 27, 2023(expired)· nominal 20-yr term from priority
C04B 40/0039C09K 8/487C04B 28/02C04B 2103/46
44
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Claims
Abstract
An improved fluid loss control additive and methods of using such compositions in surface and subterranean applications are provided. A method of cementing in a subterranean formation, that comprises providing a cement composition that comprises a cement, water, and a fluid loss control additive, the fluid loss control additive comprising an acrylic acid copolymer derivative, an iron compound, and at least one of a hydratable polymer or a dispersant, placing the cement composition into the subterranean formation, and permitting the cement composition to set therein, is provided. Also provided are methods of reducing the fluid loss from a cement composition, cement compositions, and fluid loss control additives.
Claims
exact text as granted — not AI-modified1 . A method of cementing in a subterranean formation comprising:
providing a cement composition comprising a cement, water, and a fluid loss control additive, the fluid loss control additive comprising:
an acrylic acid copolymer derivative,
an iron compound, and
at least one of a hydratable polymer or a dispersant;
placing the cement composition into the subterranean formation; and permitting the cement composition to set therein.
2 . The method of claim 1 wherein the acrylic acid copolymer derivative comprises a copolymer or a copolymer salt that comprises first monomers formed from N,N-dimethylacrylamide, and second monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof.
3 . The method of claim 2 wherein the copolymer or the copolymer salt has a N,N-dimethylacrylamide to 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof mole ratio of from about 1:4 to about 4:1.
4 . The method of claim 2 wherein the copolymer or the copolymer salt has a weight average molecular weight of between about 75,000 daltons and about 300,000 daltons.
5 . The method of claim 1 wherein the acrylic acid copolymer derivative comprises a graft polymer comprising a backbone comprising at least one of a lignin, a lignite, or their salts and a grafted pendant group comprising monomers formed from at least one of 2-acrylamido-2-methylpropane sulfonic acid, acrylonitrile, N,N-dimethylacrylamide, acrylic acid, or N,N-dialkylaminoethylmethacrylate.
6 . The method of claim 1 wherein the acrylic acid copolymer derivative comprises a graft polymer comprising a backbone comprising at least one of derivatized cellulose, polyvinyl alcohol, polyethylene oxide, or polypropylene oxide, and a grafted pendant group comprising monomers formed from at least one of 2-acrylamido-2-methylpropane sulfonic acid, acrylonitrile, N,N-dimethylacrylamide, acrylic acid, or N,N-dialkylaminoethylmethacrylate.
7 . The method of claim 1 wherein the acrylic acid copolymer derivative comprises a copolymer or a copolymer salt comprising first monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof.
8 . The method of claim 7 wherein the copolymer or the copolymer salt comprises first monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof, second monomers formed from maleic acid or a salt thereof, third monomers formed from N-vinyl caprolactam, and fourth monomers formed from 4-hydroxybutyl vinyl ether.
9 . The method of claim 7 wherein the copolymer or the copolymer salt comprises a copolymer comprising first monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof, and second monomers formed from hydrolyzed acrylamide.
10 . The method of claim 1 wherein the acrylic acid copolymer derivative comprises a copolymer or copolymer salt comprising a waffle tannin having monomers formed from at least one of 2-acrylamido-2-methylpropane sulfonic acid or acrylamide grafted thereto.
11 . The method of claim 1 wherein the acrylic acid copolymer derivative comprises 1 part by weight of a polymer comprising 70 mole % of AMPS, 17 mole % of N, N-dimethylacrylamide, and 13 mole % of acrylamide, and 2 parts by weight of hydroxyethylcellulose having 1.5 moles of ethylene oxide substitution.
12 . The method of claim 1 wherein the acrylic acid copolymer derivative comprises a copolymer or copolymer salt of a vinylamide morpholine derivative and least one branched N-vinylamide derivative, wherein the vinylamide morpholine derivative is selected from compounds represented by the formula:
wherein R 1 —H or —CH 3 and R 2 is —H, —CH 3 , or —CH 2 CH 3 and is positioned on any of the four carbon atoms in the morpholine ring, and the N-vinylamide derivative is selected from the compounds represented by the formula:
wherein R 3 is R 1 —H or —CH 3 ; R 4 is —H, —CH 3 , —CH 2 CH 3 , —CH(CH 3 ) 2 , —C(CH 3 ) 3 , or —CH(CH 3 ) 2 SO 3 X, wherein X is —Na, —NH 4 , or —Ca½, and R 5 is —H, —CH 3 , or —CH 2 CH 3 .
13 . The method of claim 12 wherein the vinylamide derivative is acryloylmorpholine, and the branched N-vinylamide derivative is a sodium salt of 2-acrylamido-2-methylpropanesulfonic acid.
14 . The method of claim 12 wherein the vinylamide derivative is acryloylmorpholine, a first vinylamide derivative is a sodium salt of 2-acrylamido-2-methylpropanesulfonic acid, and a second vinylamide derivative is acrylamide.
15 . The method of claim 1 wherein the hydratable polymer comprises carboxymethylcellulose, hydroxyethylcellulose, carboxymethylhydroxyethylcellulose, a vinyl sulfonated polymer, a hydratable graft polymer, or a mixture thereof.
16 . The method of claim 1 wherein the hydratable polymer is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
17 . The method of claim 1 wherein the dispersant comprises a sodium salt of napthalene sulfonic acid, or a water-soluble polymer prepared by the caustic-catalyzed condensation of formaldehyde with acetone wherein the polymer contains sodium sulfate groups.
18 . The method of claim 1 wherein the dispersant is present in the fluid loss control additive in an amount sufficient to prevent gelation of the cement composition.
19 . The method of claim 1 wherein the dispersant is present in the fluid loss control additive in an amount in the range of from about 5% to about 70% by weight of the fluid loss control additive.
20 . The method of claim 1 wherein the iron compound is present in the fluid loss control additive in an amount in the range of from about 5% to about 25% by weight of the fluid loss control additive.
21 . The method of claim 1 wherein the iron compound is present in the fluid loss control additive in an amount in the range of from about 10% to about 15% by weight of the fluid loss control additive.
22 . The method of claim 1 wherein the iron compound is an iron chloride or an iron gluconate.
23 . The method of claim 22 wherein the iron chloride is ferrous chloride, ferric chloride, or a mixture thereof.
24 . The method of claim 1 wherein the fluid loss control additive further comprises a zeolite.
25 . The method of claim 24 wherein the zeolite further comprises chabazite and amorphous silica.
26 . The method of claim 24 wherein the zeolite is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
27 . The method of claim 24 wherein the fluid loss control additive further comprises an organic acid, a deaggregation agent, silica, or a combination thereof.
28 . The method of claim 1 wherein the fluid loss control additive further comprises a shale.
29 . The method of claim 28 wherein the shale comprises vitrified shale.
30 . The method of claim 28 wherein the shale is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
31 . The method of claim 28 wherein the fluid loss control additive further comprises an organic acid, a deaggregation agent, silica, or a combination thereof.
32 . The method of claim 31 wherein the organic acid is present in the fluid loss control additive in an amount sufficient to provide a desired degree of viscosity control.
33 . The method of claim 31 wherein the organic acid is present in the fluid loss control additive in an amount in the range of from about 0.01% to about 5% by weight of the fluid loss control additive.
34 . The method of claim 31 wherein the deaggregation agent is present in the fluid loss control additive in an amount sufficient to enable the fluid loss control additive to flow freely as a powder.
35 . The method of claim 31 wherein the deaggregation agent is present in the fluid loss control additive in an amount in the range of from about 1% to about 15% by weight of the fluid loss control additive.
36 . The method of claim 31 wherein the silica is high surface area amorphous silica.
37 . The method of claim 36 wherein the high surface area amorphous silica is present in the fluid loss control additive in an amount sufficient to provide a desired after-set compressive strength.
38 . The method of claim 36 wherein the high surface area amorphous silica is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
39 . The method of claim 1 wherein the cement comprises a Portland cement, a pozzolanic cement, a gypsum cement, a high alumina content cement, a silica cement, or a high alkalinity cement.
40 . The method of claim 1 wherein the water is present in the cement composition in an amount sufficient to form a pumpable slurry.
41 . The method of claim 1 wherein the water is present in the cement composition in an amount in the range of from about 15% to about 200% by weight of cement.
42 . The method of claim 1 wherein the cement composition has a density in the range of from about 5 pounds per gallon to about 30 pounds per gallon.
43 . The method of claim 1 wherein the fluid loss control additive is present in the cement composition in an amount sufficient to provide a desired degree of fluid loss control.
44 . The method of claim 1 wherein the fluid loss control additive is present in the cement composition in an amount in the range of from about 0.01% to about 5% by weight of cement.
45 . The method of claim 1 wherein the acrylic acid copolymer derivative is present in the fluid loss control additive in an amount in the range of from about 1% to about 99% by weight.
46 . The method of claim 1 wherein the fluid loss control additive is present in the cement composition in an amount in the range of from about 0.01% to about 5% by weight of cement, the iron compound is present in the fluid loss control additive in an amount in the range of from about 10% to about 15% by weight of the fluid loss control additive, the hydratable polymer is present in the fluid loss control additive in an amount in the range of from about 1% to about 5% by weight of the fluid loss control additive, and the dispersant is present in the fluid loss control additive in an amount in the range of from about 20% to about 45% by weight of the fluid loss control additive.
47 . A method of reducing the fluid loss from a cement composition, comprising adding to the cement composition a fluid loss control additive comprising:
an acrylic acid copolymer derivative, an iron compound, and at least one of a dispersant or a hydratable polymer.
48 . The method of claim 47 wherein the acrylic acid copolymer derivative comprises a copolymer or a copolymer salt that comprises first monomers formed from N,N-dimethylacrylamide, and second monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof.
49 . The method of claim 48 wherein the copolymer or the copolymer salt has a N,N-dimethylacrylamide to 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof mole ratio of from about 1:4 to about 4:1.
50 . The method of claim 48 wherein the copolymer or the copolymer salt has a weight average molecular weight of between about 75,000 daltons and about 300,000 daltons.
51 . The method of claim 47 wherein the acrylic acid copolymer derivative comprises a graft polymer comprising a backbone comprising at least one of a lignin, a lignite, or their salts and a grafted pendant group comprising monomers formed from at least one of 2-acrylamido-2-methylpropane sulfonic acid, acrylonitrile, N,N-dimethylacrylamide, acrylic acid, or N,N-dialkylaminoethylmethacrylate.
52 . The method of claim 47 wherein the acrylic acid copolymer derivative comprises a graft polymer comprising a backbone comprising at least one of derivatized cellulose, polyvinyl alcohol, polyethylene oxide, or polypropylene oxide, and a grafted pendant group comprising monomers formed from at least one of 2-acrylamido-2-methylpropane sulfonic acid, acrylonitrile, N,N-dimethylacrylamide, acrylic acid, or N,N-dialkylaminoethylmethacrylate.
53 . The method of claim 47 wherein the acrylic acid copolymer derivative comprises a copolymer or a copolymer salt comprising first monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof.
54 . The method of claim 53 wherein the copolymer or the copolymer salt comprises first monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof, second monomers formed from maleic acid or a salt thereof, third monomers formed from N-vinyl caprolactam, and fourth monomers formed from 4-hydroxybutyl vinyl ether.
55 . The method of claim 53 wherein the copolymer or the copolymer salt comprises a copolymer comprising first monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof, and second monomers formed from hydrolyzed acrylamide.
56 . The method of claim 47 wherein the acrylic acid copolymer derivative comprises a copolymer or copolymer salt comprising a waffle tannin having monomers formed from at least one of 2-acrylamido-2-methylpropane sulfonic acid or acrylamide grafted thereto.
57 . The method of claim 47 wherein the acrylic acid copolymer derivative comprises 1 part by weight of a polymer comprising 70 mole % of AMPS, 17 mole % of N, N-dimethylacrylamide, and 13 mole % of acrylamide, and 2 parts by weight of hydroxyethylcellulose having 1.5 moles of ethylene oxide substitution.
58 . The method of claim 47 wherein the acrylic acid copolymer derivative comprises a copolymer or copolymer salt of a vinylamide morpholine derivative and least one branched N-vinylamide derivative, wherein the vinylamide morpholine derivative is selected from compounds represented by the formula:
wherein R 1 —H or —CH 3 and R 2 is —H, —CH 3 , or —CH 2 CH 3 and is positioned on any of the four carbon atoms in the morpholine ring, and the N-vinylamide derivative is selected from the compounds represented by the formula:
wherein R 3 is R 1 —H or —CH 3 ; R 4 is —H, —CH 3 , —CH 2 CH 3 , —CH(CH 3 ) 2 , —C(CH 3 ) 3 , or —CH(CH 3 ) 2 SO 3 X, wherein X is —Na, —NH 4 , or —Ca½, and R 5 is —H, —CH 3 , or —CH 2 CH 3 .
59 . The method of claim 58 wherein the vinylamide derivative is acryloylmorpholine and the branched N-vinylamide derivative is a sodium salt of b 2 -acrylamido-2-methylpropanesulfonic acid.
60 . The method of claim 58 wherein the vinylamide derivative is acryloylmorpholine, a first vinylamide derivative is a sodium salt of 2-acrylamido-2-methylpropanesulfonic acid, and a second vinylamide derivative is acrylamide.
61 . The method of claim 47 wherein the hydratable polymer comprises carboxymethylcellulose, hydroxyethylcellulose, carboxymethylhydroxyethylcellulose, a vinyl sulfonated polymer, a hydratable graft polymer, or a mixture thereof.
62 . The method of claim 47 wherein the dispersant comprises a sodium salt of napthalene sulfonic acid, or a water-soluble polymer prepared by the caustic-catalyzed condensation of formaldehyde with acetone wherein the polymer contains sodium sulfate groups.
63 . The method of claim 47 wherein the dispersant is present in the fluid loss control additive in an amount sufficient to prevent gelation of the cement composition.
64 . The method of claim 47 wherein the iron compound is an iron chloride or an iron gluconate.
65 . The method of claim 64 wherein the iron chloride is ferrous chloride, ferric chloride, or a mixture thereof.
66 . The method of claim 47 wherein the fluid loss control additive further comprises a zeolite.
67 . The method of claim 66 wherein the zeolite further comprises chabazite and amorphous silica.
68 . The method of claim 66 wherein the zeolite is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
69 . The method of claim 66 wherein the fluid loss control additive further comprises an organic acid, a deaggregation agent, silica, or a combination thereof.
70 . The method of claim 47 wherein the fluid loss control additive further comprises a shale.
71 . The method of claim 70 wherein the shale comprises vitrified shale.
72 . The method of claim 70 wherein the fluid loss control additive further comprises a deaggregation agent, silica, or a combination thereof.
73 . The method of claim 72 wherein the silica is high surface area amorphous silica.
74 . The method of claim 73 wherein the high surface area amorphous silica is present in the fluid loss control additive in an amount sufficient to provide a desired after-set compressive strength.
75 . The method of claim 47 wherein the fluid loss control additive is present in the cement composition in an amount in the range of from about 0.01% to about 5% by weight of cement.
76 . The method of claim 47 wherein the acrylic acid copolymer derivative is present in the fluid loss control additive in an amount in the range of from about 30% to about 60% by weight.
77 . The method of claim 47 wherein the fluid loss control additive is present in the cement composition in an amount in the range of from about 0.01% to about 5% by weight of cement, the iron compound is present in the fluid loss control additive in an amount in the range of from about 10% to about 15% by weight of the fluid loss control additive, the hydratable polymer is present in the fluid loss control additive in an amount in the range of from about 1% to about 5% by weight of the fluid loss control additive, and the dispersant is present in the fluid loss control additive in an amount in the range of from about 20% to about 45% by weight of the fluid loss control additive.
78 . A cement composition comprising a cement, water, and a fluid loss control additive, the fluid loss control additive comprising:
an acrylic acid copolymer derivative; an iron compound; and at least one of a dispersant or a hydratable polymer.
79 . The cement composition of claim 78 wherein the acrylic acid copolymer derivative comprises a copolymer or a copolymer salt that comprises first monomers formed from N,N-dimethylacrylamide, and second monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof.
80 . The cement composition of claim 79 wherein the copolymer or the copolymer salt has a N,N-dimethylacrylamide to 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof mole ratio of from about 1:4 to about 4:1.
81 . The cement composition of claim 79 wherein the copolymer or the copolymer salt has a weight average molecular weight of between about 75,000 daltons and about 300,000 daltons.
82 . The cement composition of claim 78 wherein the acrylic acid copolymer derivative comprises a graft polymer comprising a backbone comprising at least one of a lignin, a lignite, or their salts and a grafted pendant group comprising monomers formed from at least one of 2-acrylamido-2-methylpropane sulfonic acid, acrylonitrile, N,N-dimethylacrylamide, acrylic acid, or N,N-dialkylaminoethylmethacrylate.
83 . The cement composition of claim 78 wherein the acrylic acid copolymer derivative comprises a graft polymer comprising a backbone comprising at least one of derivatized cellulose, polyvinyl alcohol, polyethylene oxide, or polypropylene oxide, and a grafted pendant group comprising monomers formed from at least one of 2-acrylamido-2-methylpropane sulfonic acid, acrylonitrile, N,N-dimethylacrylamide, acrylic acid, or N,N-dialkylaminoethylmethacrylate.
84 . The cement composition of claim 78 wherein the acrylic acid copolymer derivative comprises a copolymer or a copolymer salt comprising first monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof.
85 . The cement composition of claim 84 wherein the copolymer or the copolymer salt comprises first monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof, second monomers formed from maleic acid or a salt thereof, third monomers formed from N-vinyl caprolactam, and fourth monomers formed from 4-hydroxybutyl vinyl ether.
86 . The cement composition of claim 84 wherein the copolymer or the copolymer salt comprises a copolymer comprising first monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof, and second monomers formed from hydrolyzed acrylamide.
87 . The cement composition of claim 78 wherein the acrylic acid copolymer derivative comprises a copolymer or copolymer salt comprising a waffle tannin having monomers formed from at least one of 2-acrylamido-2-methylpropane sulfonic acid or acrylamide grafted thereto.
88 . The cement composition of claim 78 wherein the acrylic acid copolymer derivative comprises 1 part by weight of a polymer comprising 70 mole % of AMPS, 17 mole % of N, N-dimethylacrylamide, and 13 mole % of acrylamide, and 2 parts by weight of hydroxyethylcellulose having 1.5 moles of ethylene oxide substitution.
89 . The cement composition of claim 78 wherein the acrylic acid copolymer derivative comprises a copolymer or copolymer salt of a vinylamide morpholine derivative and least one branched N-vinylamide derivative, wherein the vinylamide morpholine derivative is selected from compounds represented by the formula:
wherein R 1 —H or —CH 3 and R 2 is —H, —CH 3 , or —CH 2 CH 3 and is positioned on any of the four carbon atoms in the morpholine ring, and the N-vinylamide derivative is selected from the compounds represented by the formula:
wherein R 3 is R 1 —H or —CH 3 ; R 4 is —H, —CH 3 , —CH 2 CH 3 , —CH(CH 3 ) 2 , —(CH 3 ) 3 , or —CH(CH 3 ) 2 SO 3 X, wherein X is —Na, —NH 4 , or —Ca½, and R 5 is —H, —CH 3 , or —CH 2 CH 3 .
90 . The cement composition of claim 89 wherein the vinylamide derivative is acryloylmorpholine, and the branched N-vinylamide derivative is a sodium salt of 2-acrylamido-2-methylpropanesulfonic acid.
91 . The cement composition of claim 89 wherein the vinylamide derivative is acryloylmorpholine, a first vinylamide derivative is a sodium salt of 2-acrylamido-2-methylpropanesulfonic acid, and a second vinylamide derivative is acrylamide.
92 . The cement composition of claim 78 wherein the hydratable polymer comprises carboxymethylcellulose, hydroxyethylcellulose, carboxymethylhydroxyethylcellulose, a vinyl sulfonated polymer, a hydratable graft polymer, or a mixture thereof.
93 . The cement composition of claim 78 wherein the hydratable polymer is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
94 . The cement composition of claim 78 wherein the dispersant comprises a sodium salt of napthalene sulfonic acid, or a water-soluble polymer prepared by the caustic-catalyzed condensation of formaldehyde with acetone wherein the polymer contains sodium sulfate groups.
95 . The cement composition of claim 78 wherein the dispersant is present in the fluid loss control additive in an amount sufficient to prevent gelation of the cement composition.
96 . The cement composition of claim 78 wherein the dispersant is present in the fluid loss control additive in an amount in the range of from about 5% to about 70% by weight of the fluid loss control additive.
97 . The cement composition of claim 78 wherein the iron compound is present in the fluid loss control additive in an amount in the range of from about 5% to about 25% by weight of the fluid loss control additive.
98 . The cement composition of claim 78 wherein the iron compound is present in the fluid loss control additive in an amount in the range of from about 10% to about 15% by weight of the fluid loss control additive.
99 . The cement composition of claim 78 wherein the iron compound is an iron chloride or an iron gluconate.
100 . The cement composition of claim 99 wherein the iron chloride is ferrous chloride, ferric chloride, or a mixture thereof.
101 . The cement composition of claim 78 wherein the fluid loss control additive further comprises a zeolite.
102 . The cement composition of claim 101 wherein the zeolite further comprises chabazite and amorphous silica.
103 . The cement composition of claim 101 wherein the zeolite is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
104 . The cement composition of claim 101 wherein the fluid loss control additive further comprises an organic acid, a deaggregation agent, silica, or a combination thereof.
105 . The cement composition of claim 78 wherein the fluid loss control additive further comprises a shale.
106 . The cement composition of claim 105 wherein the shale comprises vitrified shale.
107 . The cement composition of claim 105 wherein the shale is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
108 . The cement composition of claim 105 wherein the fluid loss control additive further comprises an organic acid, a deaggregation agent, silica, or a combination thereof.
109 . The cement composition of claim 108 wherein the organic acid is present in the fluid loss control additive in an amount sufficient to provide a desired degree of viscosity control.
110 . The cement composition of claim 108 wherein the organic acid is present in the fluid loss control additive in an amount in the range of from about 0.01% to about 5% by weight of the fluid loss control additive.
111 . The cement composition of claim 108 wherein the deaggregation agent is present in the fluid loss control additive in an amount sufficient to enable the fluid loss control additive to flow freely as a powder.
112 . The cement composition of claim 108 wherein the deaggregation agent is present in the fluid loss control additive in an amount in the range of from about 1% to about 15% by weight of the fluid loss control additive.
113 . The cement composition of claim 108 wherein the silica is high surface area amorphous silica.
114 . The cement composition of claim 113 wherein the high surface area amorphous silica is present in the fluid loss control additive in an amount sufficient to provide a desired after-set compressive strength.
115 . The cement composition of claim 113 wherein the high surface area amorphous silica is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
116 . The cement composition of claim 78 wherein the cement comprises a Portland cement, a pozzolanic cement, a gypsum cement, a high alumina content cement, a silica cement, or a high alkalinity cement.
117 . The cement composition of claim 78 wherein the water is present in the cement composition in an amount sufficient to form a pumpable slurry.
118 . The cement composition of claim 78 wherein the water is present in the cement composition in an amount in the range of from about 15% to about 200% by weight of cement.
119 . The cement composition of claim 78 wherein the cement composition has a density in the range of from about 5 pounds per gallon to about 30 pounds per gallon.
120 . The cement composition of claim 78 wherein the cement composition further comprises a weighting agent, a defoamer, a surfactant, mica, fiber, bentonite, microspheres, fumed silica, a salt, vitrified shale, fly ash, a dispersant, a retardant, or an accelerant.
121 . The cement composition of claim 78 wherein the fluid loss control additive is present in the cement composition in an amount sufficient to provide a desired degree of fluid loss control.
122 . The cement composition of claim 78 wherein the fluid loss control additive is present in the cement composition in an amount in the range of from about 0.01% to about 5% by weight of cement.
123 . The cement composition of claim 78 wherein the acrylic acid copolymer derivative is present in the fluid loss control additive in an amount in the range of from about 1% to about 99% by weight.
124 . The cement composition of claim 78 wherein the fluid loss control additive is present in the cement composition in an amount in the range of from about 0.01% to about 5% by weight of cement, the iron compound is present in the fluid loss control additive in an amount in the range of from about 10% to about 15% by weight of the fluid loss control additive, the hydratable polymer is present in the fluid loss control additive in an amount in the range of from about 1% to about 5% by weight of the fluid loss control additive, and the dispersant is present in the fluid loss control additive in an amount in the range of from about 20% to about 45% by weight of the fluid loss control additive.
125 . A fluid loss control additive comprising:
an acrylic acid copolymer derivative; an iron compound; and at least one of a dispersant or a hydratable polymer.
126 . The fluid loss control additive of claim 125 wherein the acrylic acid copolymer derivative comprises a copolymer or a copolymer salt that comprises first monomers formed from N,N-dimethylacrylamide, and second monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof.
127 . The fluid loss control additive of claim 126 wherein the copolymer or the copolymer salt has a N,N-dimethylacrylamide to 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof mole ratio of from about 1:4 to about 4:1.
128 . The fluid loss control additive of claim 126 wherein the copolymer or the copolymer salt has a weight average molecular weight of between about 75,000 daltons and about 300,000 daltons.
129 . The fluid loss control additive of claim 125 wherein the acrylic acid copolymer derivative comprises a graft polymer comprising a backbone comprising at least one of a lignin, a lignite, or their salts and a grafted pendant group comprising monomers formed from at least one of 2-acrylamido-2-methylpropane sulfonic acid, acrylonitrile, N,N-dimethylacrylamide, acrylic acid, or N,N-dialkylaminoethylmethacrylate.
130 . The fluid loss control additive of claim 125 wherein the acrylic acid copolymer derivative comprises a graft polymer comprising a backbone comprising at least one of derivatized cellulose, polyvinyl alcohol, polyethylene oxide, or polypropylene oxide, and a grafted pendant group comprising monomers formed from at least one of 2-acrylamido-2-methylpropane sulfonic acid, acrylonitrile, N,N-dimethylacrylamide, acrylic acid, or N,N-dialkylaminoethylmethacrylate.
131 . The fluid loss control additive of claim 125 wherein the acrylic acid copolymer derivative comprises a copolymer or a copolymer salt comprising first monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof.
132 . The fluid loss control additive of claim 131 wherein the copolymer or the copolymer salt comprises first monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof, second monomers formed from maleic acid or a salt thereof, third monomers formed from N-vinyl caprolactam, and fourth monomers formed from 4-hydroxybutyl vinyl ether.
133 . The fluid loss control additive of claim 131 wherein the copolymer or the copolymer salt comprises a copolymer comprising first monomers formed from 2-acrylamido-2-methylpropane sulfonic acid or a derivative thereof, and second monomers formed from hydrolyzed acrylamide.
134 . The fluid loss control additive of claim 125 wherein the acrylic acid copolymer derivative comprises a copolymer or copolymer salt comprising a waffle tannin having monomers formed from at least one of 2-acrylamido-2-methylpropane sulfonic acid or acrylamide grafted thereto.
135 . The fluid loss control additive of claim 125 wherein the acrylic acid copolymer derivative comprises 1 part by weight of a polymer comprising 70 mole % of AMPS, 17 mole % of N, N-dimethylacrylamide, and 13 mole % of acrylamide, and 2 parts by weight of hydroxyethylcellulose having 1.5 moles of ethylene oxide substitution.
136 . The fluid loss control additive of claim 125 wherein the acrylic acid copolymer derivative comprises a copolymer or copolymer salt of a vinylamide morpholine derivative and least one branched N-vinylamide derivative, wherein the vinylamide morpholine derivative is selected from compounds represented by the formula:
wherein R 1 —H or —CH 3 and R 2 is —H, —CH 3 , or —CH 2 CH 3 and is positioned on any of the four carbon atoms in the morpholine ring, and the N-vinylamide derivative is selected from the compounds represented by the formula:
wherein R 3 is R 1 —H or —CH 3 ; R 4 is —H, —CH 3 , —CH 2 CH 3 , —CH(CH 3 ) 2 , —C(CH 3 ) 3 , or —CH(CH 3 ) 2 SO 3 X, wherein X is —Na, —NH 4 , or —Ca½, and R 5 is —H, —CH 3 , or —CH 2 CH 3 .
137 . The fluid loss control additive of claim 136 wherein the vinylamide derivative is acryloylmorpholine and the branched N-vinylamide derivative is a sodium salt of 2-acrylamido-2-methylpropanesulfonic acid.
138 . The fluid loss control additive of claim 136 wherein the vinylamide derivative is acryloylmorpholine, a first vinylamide derivative is a sodium salt of 2-acrylamido-2-methylpropanesulfonic acid, and a second vinylamide derivative is acrylamide.
139 . The fluid loss control additive of claim 125 wherein the hydratable polymer comprises carboxymethylcellulose, hydroxyethylcellulose, carboxymethylhydroxyethylcellulose, a vinyl sulfonated polymer, a hydratable graft polymer, or a mixture thereof.
140 . The fluid loss control additive of claim 125 wherein the hydratable polymer is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
141 . The fluid loss control additive of claim 125 wherein the dispersant comprises a sodium salt of napthalene sulfonic acid, or a water-soluble polymer prepared by the caustic-catalyzed condensation of formaldehyde with acetone wherein the polymer contains sodium sulfate groups.
142 . The fluid loss control additive of claim 125 wherein the dispersant is present in the fluid loss control additive in an amount sufficient to prevent gelation of the fluid loss control additive.
143 . The fluid loss control additive of claim 125 wherein the dispersant is present in the fluid loss control additive in an amount in the range of from about 5% to about 70% by weight of the fluid loss control additive.
144 . The fluid loss control additive of claim 125 wherein the iron compound is present in the fluid loss control additive in an amount in the range of from about 5% to about 25% by weight of the fluid loss control additive.
145 . The fluid loss control additive of claim 125 wherein the iron compound is an iron chloride or an iron gluconate.
146 . The fluid loss control additive of claim 145 wherein the iron chloride is ferrous chloride, ferric chloride, or a mixture thereof.
147 . The fluid loss control additive of claim 125 wherein the fluid loss control additive further comprises a zeolite.
148 . The fluid loss control additive of claim 147 wherein the zeolite further comprises chabazite and amorphous silica.
149 . The fluid loss control additive of claim 147 wherein the zeolite is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
150 . The fluid loss control additive of claim 147 wherein the fluid loss control additive further comprises an organic acid, a deaggregation agent, silica, or a combination thereof.
151 . The fluid loss control additive of claim 125 wherein the fluid loss control additive further comprises a shale.
152 . The fluid loss control additive of claim 151 wherein the shale comprises vitrified shale.
153 . The fluid loss control additive of claim 151 wherein the shale is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
154 . The fluid loss control additive of claim 151 wherein the fluid loss control additive further comprises an organic acid, a deaggregation agent, silica, or a combination thereof.
155 . The fluid loss control additive of claim 154 wherein the organic acid is present in the fluid loss control additive in an amount sufficient to provide a desired degree of viscosity control.
156 . The fluid loss control additive of claim 154 wherein the organic acid is present in the fluid loss control additive in an amount in the range of from about 0.01% to about 5% by weight of the fluid loss control additive.
157 . The fluid loss control additive of claim 154 wherein the deaggregation agent is present in the fluid loss control additive in an amount sufficient to enable the fluid loss control additive to flow freely as a powder.
158 . The fluid loss control additive of claim 154 wherein the deaggregation agent is present in the fluid loss control additive in an amount in the range of from about 1% to about 15% by weight of the fluid loss control additive.
159 . The fluid loss control additive of claim 154 wherein the silica is high surface area amorphous silica.
160 . The fluid loss control additive of claim 159 wherein the high surface area amorphous silica is present in the fluid loss control additive in an amount sufficient to provide a desired after-set compressive strength.
161 . The fluid loss control additive of claim 159 wherein the high surface area amorphous silica is present in the fluid loss control additive in an amount in the range of from about 0.1% to about 15% by weight of the fluid loss control additive.
162 . The fluid loss control additive of claim 125 wherein the acrylic acid copolymer derivative is present in the fluid loss control additive in an amount in the range of from about 1% to about 99% by weight.
163 . The fluid loss control additive of claim 125 wherein the fluid loss control additive is present in the cement composition in an amount in the range of from about 0.01% to about 5% by weight of cement, the iron compound is present in the fluid loss control additive in an amount in the range of from about 10% to about 15% by weight of the fluid loss control additive, the hydratable polymer is present in the fluid loss control additive in an amount in the range of from about 1% to about 5% by weight of the fluid loss control additive, and the dispersant is present in the fluid loss control additive in an amount in the range of from about 20% to about 45% by weight of the fluid loss control additive.Join the waitlist — get patent alerts
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