Extended settable compositions comprising cement kiln dust and associated methods
An embodiment of the present invention includes a method of cementing in a subterranean formation comprising: providing an extended settable composition comprising hydraulic cement, cement kiln dust, water, and a set retarding additive, wherein the extended settable composition is capable of remaining in a pumpable fluid state for at least about 1 day; adding a cement set accelerator to the extended settable composition; introducing the extended settable composition into a well bore; and allowing the extended settable composition to set. Another embodiment of the present invention includes a method of cementing in a subterranean formation comprising: providing an extended settable composition comprising hydraulic cement, cement kiln dust, water, and a set retarding additive; storing the extended settable composition; adding a cement set accelerator to the extended settable composition; introducing the extended settable composition into a well bore; and allowing the extended settable composition to set.
1. An extended settable composition comprising:
hydraulic cement in an amount of about 25% to about 75% by weight, wherein the hydraulic cement comprises a cement selected from the group consisting of Portland cement, pozzolana cement, gypsum cement, high alumina content cement, slag cement, silica cement, and any combination thereof,
cement kiln dust in an amount of about 25% to about 75% by weight,
a set retarding additive in an amount of about 0.1% to about 5% by weight, and
water, wherein the extended settable composition is capable of remaining in a pumpable fluid state for at least about 1 day.
2. The extended settable composition of claim 1 wherein the extended settable composition is capable of remaining in a pumpable fluid state for at least about 5 days.
3. The extended settable composition of claim 1 wherein the density of the extended settable composition is in the range of from about 8 pounds per gallon to about 16 pounds per gallon.
4. The extended settable composition of claim 1 wherein the water comprises water selected from the group consisting of freshwater, saltwater, brine, seawater, and any combination thereof.
5. The extended settable composition of claim 1 wherein the water is present in the extended settable composition in an amount in the range of from about 40% to about 150% by weight.
6. The extended settable composition of claim 1 wherein the set retarding additive comprises a set retarding additive selected from the group consisting of an organic acid, a lignosulfonate, a synthetic retarder, and any combination thereof.
7. The extended settable composition of claim 1 wherein the set retarding additive comprises tartaric acid.
8. The extended settable composition of claim 1 wherein the set retarding additive comprises a sulfomethylated lignin.
9. The extended settable composition of claim 1 wherein the extended settable composition comprises an additive selected from the group consisting of fly ash, slag cement, shale, zeolite, metakaolin, and any combination thereof.
10. An extended settable composition comprising:
hydraulic cement in an amount of about 25% to about 75% by weight, wherein the hydraulic cement comprises a cement selected from the around consisting of Portland cement, pozzolana cement, gypsum cement, high alumina content cement, slag cement, silica cement, and any combination thereof,
cement kiln dust in an amount of about 25% to about 75% by weight,
a set retarding additive in an amount of about 0.1% to about 5% by weight, wherein the set retarding additive comprises tartaric acid, and
water, wherein the extended settable composition is capable of remaining in a pumpable fluid state for at least about 5 days.
11. The extended settable composition of claim 10 wherein the density of the composition is in the range of from about 8 pounds per gallon to about 16 pounds per gallon.
12. The extended settable composition of claim 10 wherein the water comprises water selected from the group consisting of freshwater, saltwater, brine, seawater, and any combination thereof.
13. The extended settable composition of claim 10 wherein the water is present in the composition in an amount in the range of from about 40% to about 150% by weight.
14. The extended settable composition of claim 10 wherein the extended settable composition comprises an additive selected from the group consisting of fly ash, slag cement, shale, zeolite, metakaolin, and any combination thereof.
15. The extended settable composition of claim 10 wherein the hydraulic cement comprises the Portland cement.
16. The extended settable composition of claim 10 wherein the extended settable composition further comprises a fluid loss control additive.
17. The extended settable composition of claim 10 wherein the extended settable composition further comprises an additive selected from the group consisting of a weight reducing additive, a heavyweight additive, a lost circulation material, a filtration control additive, a dispersant, a suspending agent, and any combination thereof
18. The extended settable composition of claim 1 wherein the hydraulic cement comprises the Portland cement.
19. The extended settable composition of claim 1 wherein the extended settable composition further comprises a fluid loss control additive.
20. The extended settable composition of claim 1 wherein the extended settable composition further comprises an additive selected from the group consisting of a weight reducing additive, a heavyweight additive, a lost circulation material, a filtration control additive, a dispersant, a suspending agent, and any combination thereof.