Claims
- 1. A storable water-microsphere suspension comprising:
water; microspheres; and an effective amount of a suspending agent selected from the group consisting of microfine or colloidal materials and gel forming polymers.
- 2. The suspension of claim 1 wherein said water is selected from the group consisting of fresh water and salt water.
- 3. The suspension of claim 1 wherein said microspheres are selected from the group consisting of fly ash microspheres, glass microspheres and recycled glass microspheres.
- 4. The suspension of claim 1 wherein said microspheres are present in said suspension in an amount in the range of from about 25% to about 150% by weight of water in said suspension.
- 5. The suspension of claim 1 wherein said suspending agent is a microfine or colloidal material selected from the group consisting of carbon black, lignite, brown coal, humic acid, fumed silica, precipitated silica, polyvinyl alcohol latex, styrene-butadiene latex and surfactant micelle.
- 6. The suspension of claim 5 wherein the suspending agent is present in an amount in the range of from about 25% to about 75% by weight of water in said suspension.
- 7. The suspension of claim 1 wherein said suspending agent is a polymer selected from the group consisting of carragenan, scleroglycan, xanthan, guar, hydroxypropylguar, hydroxyethylcellulose, carboxymethylhydroxyethylcellulose and a copolymer or terpolymer of acrylamidemethyl propylene sulfonate, N,N-dimethylacrylamide and acrylic acid.
- 8. The suspension of claim 7 wherein the suspending agent is present in an amount in the range of from about 0.1% to about 1.5% by weight of water in said suspension.
- 9. The suspension of claim 1 wherein said suspending agent is present in said suspension in an amount in the range of from about 0.1% to about 75% by weight of said water in said suspension.
- 10. A storable water-microsphere suspension for use in well cement compositions comprising:
water; microspheres selected from the group consisting of fly ash microspheres, glass microspheres and recycled glass microspheres; and a microfine or colloidal suspending agent selected from the group consisting of carbon black, lignite, brown coal, humic acid, fumed silica, precipitated silica, polyvinyl alcohol latex, styrene-butadiene latex and surfactant micelle.
- 11. The suspension of claim 10 wherein said water is selected from the group consisting of fresh water and salt water.
- 12. The suspension of claim 10 wherein said microspheres are present in said suspension in an amount in the range of from about 25% to about 150% by weight of water in said suspension.
- 13. The suspension of claim 10 wherein the suspending agent is present in an amount in the range of from about 25% to about 75% by weight of water in said suspension.
- 14. The suspension of claim 10 wherein said microspheres are fly ash microspheres.
- 15. The suspension of claim 10 wherein said microfine or colloidal suspending agent is microfine carbon black.
- 16. A storable water-microsphere suspension for use in well cement compositions comprising:
water; microspheres selected from the group consisting of fly ash microspheres, glass microspheres and recycled glass microspheres; and a polymer suspending agent selected from the group consisting of carragenan, scleroglycan, xanthan, guar, hydroxypropylguar, hydroxyethylcellulose, carboxymethylhydroxyethylcellulose and a copolymer or terpolymer of acrylamidemethyl propylene sulfonate, N,N-dimethylacrylamide and acrylic acid.
- 17. The suspension of claim 16 wherein said water is selected from the group consisting of fresh water and salt water.
- 18. The suspension of claim 16 wherein said microspheres are present in said suspension in an amount in the range of from about 25% to about 150% by weight of water in said suspension.
- 19. The suspension of claim 16 wherein the suspending agent is present in an amount in the range of from about 0.1% to about 1.5% by weight of water in said suspension.
- 20. The suspension of claim 16 wherein said microspheres are fly ash microspheres.
- 21. The suspension of claim 16 wherein said polymer suspending agent is carragenan.
- 22. A cement composition comprising:
water; hydraulic cement; and a water-microsphere suspension comprising water, microspheres, and an effective amount of a suspending agent selected from the group consisting of microfine or colloidal materials and gel forming polymers.
- 23. The cement composition of claim 22 wherein said water in the cement composition is fresh water or salt water and is present in an amount sufficient to form a pumpable slurry.
- 24. The cement composition of claim 22 wherein said hydraulic cement is selected from the group consisting of Portland cements, pozzolana cements, gypsum cements, high aluminum content cements, silica cements, high alkalinity cements and slag cements.
- 25. The cement composition of claim 22 wherein said water-microsphere suspension is included in the cement composition in an amount to produce a cement composition density in the range of from about 9.8 to about 15 pounds per gallon.
- 26. The suspension of claim 22 wherein said microspheres are selected from the group consisting of fly ash microspheres, glass microspheres and recycled glass microspheres.
- 27. The suspension of claim 22 wherein said microspheres are present in said suspension in an amount in the range of from about 25% to about 150% by weight of water in said suspension.
- 28. The suspension of claim 22 wherein said suspending agent is a microfine or colloidal material selected from the group consisting of carbon black, lignite, brown coal, humic acid, fumed silica, precipitated silica, polyvinyl alcohol latex, styrene-butadiene latex and surfactant micelle.
- 29. The suspension of claim 28 wherein the suspending agent is present in an amount in the range of from about 25% to about 75% by weight of water in said suspension.
- 30. The suspension of claim 22 wherein said suspending agent is a polymer selected from the group consisting of carragenan, scleroglycan, xanthan, guar, hydroxypropylguar, hydroxyethylcellulose, carboxymethylhydroxyethylcellulose and a copolymer or terpolymer of acrylamidemethyl propylene sulfonate, N,N-dimethylacrylamide and acrylic acid.
- 31. The suspension of claim 30 wherein the suspending agent is present in an amount in the range of from about 0.1% to about 1.5% by weight of water in said suspension.
- 32. The suspension of claim 22 wherein said suspending agent is present in said suspension in an amount in the range of from about 0.1% to about 75% by weight of said water in said suspension.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This is a divisional of application Ser. No. 10/102,995 filed on Mar. 21, 2002, now pending.
Divisions (1)
|
Number |
Date |
Country |
Parent |
10102995 |
Mar 2002 |
US |
Child |
10271238 |
Oct 2002 |
US |