Acid-soluble cement compositions comprising cement kiln dust and methods of use

Patent metadata

Field	Value
Publication number	US-8950486-B2
Application number	US-201213595493-A
Country	US
Kind code	B2
Filing date	Aug 27, 2012
Priority date	Sep 9, 2005
Publication date	Feb 10, 2015
Grant date	Feb 10, 2015

Abstract

The present invention relates to acid-soluble cement compositions that comprise cement kiln dust (“CKD”) and associated methods of use. An embodiment provides a method of cementing comprising: providing an acid-soluble cement composition comprising a kiln dust and water; allowing the acid-soluble cement composition to set to form an acid-soluble hardened mass; and contacting the acid-soluble hardened mass with an acid.

First claim

What is claimed is:

1. A method of cementing comprising:
providing an acid-soluble cement composition comprising a kiln dust and water, wherein the acid-soluble cement composition is free of any additional cementitious components other than the kiln dust;
allowing the acid-soluble cement composition to set to form an acid-soluble hardened mass; and
contacting the acid-soluble hardened mass with an acid.

2. The method of claim 1 wherein the acid-soluble cement composition has a density of about 8 pounds per gallon to about 16 pounds per gallon.

3. The method of claim 1 wherein the kiln dust comprises cement kiln dust.

4. The method of claim 1 wherein the kiln dust comprises lime kiln dust.

5. The method of claim 1 wherein the kiln dust comprises cement kiln dust present in an amount in a range of from about 1% to 100% by weight of a total amount of cementitious components present in the acid-soluble cement composition.

6. The method of claim 1 wherein the kiln dust comprises cement kiln dust present in an amount in a range of from about 50% to about 100% by weight of a total amount of cementitious components present in the acid-soluble cement composition.

7. The method of claim 1 wherein the acid-soluble cement composition is free of an acid-soluble filler.

8. The method of claim 1 wherein the acid-soluble cement composition is free of an acid-soluble filler selected from the group consisting of dolomite, magnesium carbonate, calcium carbonate, zinc carbonate, and any combination thereof.

9. The method of claim 1 wherein the acid-soluble cement composition further comprises an additive selected from the group consisting of metakaolin, crystalline silica, amorphous silica, fumed silica, salt, fiber, hydratable clay, microsphere, rice husk ash, an elastomer, an elastomeric particle, a resin, a latex, and any combination thereof.

10. The method of claim 1 wherein the acid-soluble cement composition further comprises an additive selected from the group consisting of a set-retarding additive, a strength-retrogression additive, a set accelerator, a weighting agent, a lightweight additive, a gas-generating additive, a mechanical-property-enhancing additive, a lost-circulation material, a filtration-control additive, a dispersant, a fluid-loss-control additive, a defoaming agent, a foaming agent, an oil-swellable particle, a water-swellable particle, a thixotropic additive, and any combination thereof.

11. The method of claim 1 wherein contacting the acid-soluble hardened mass with an acid comprises contacting the acid-soluble hardened mass with an aqueous acid composition, wherein the aqueous acid composition comprises hydrochloric acid present in the aqueous acid composition in an amount of about 7.5% to about 28% by weight of the aqueous acid composition.

12. The method of claim 1 further comprising: placing the acid-soluble cement composition into a subterranean formation.

13. The method of claim 12 wherein the acid-soluble cement composition is allowed to set in a well-bore annulus in the subterranean formation, wherein the acid contacts the acid-soluble hardened mass through one or more openings in a pipe string disposed in the subterranean formation.

14. The method of claim 1 wherein the acid-soluble cement composition further comprises an acid-soluble filler.

15. A method of cementing comprising:
placing an acid-soluble cement composition in a subterranean formation, the acid-soluble cement composition comprising:
cement kiln dust in an amount of 100% by weight of a total amount of cementitious components in the acid-soluble cement composition; and
water;

allowing the acid-soluble cement composition to set to form an acid-soluble hardened mass; and
contacting the acid-soluble hardened mass with an acid.

16. The method of claim 15 wherein the acid-soluble cement composition is free of an acid-soluble filler.

17. The method of claim 15 wherein the acid-soluble cement composition is free of an acid-soluble filler selected from the group consisting of dolomite, magnesium carbonate, calcium carbonate, zinc carbonate, and any combination thereof.

18. The method of claim 15 wherein the acid-soluble cement composition further comprises an additive selected from the group consisting of a set-retarding additive, a strength-retrogression additive, a set accelerator, a weighting agent, a lightweight additive, a gas-generating additive, a mechanical-property-enhancing additive, a lost-circulation material, a filtration-control additive, a dispersant, a fluid-loss-control additive, a defoaming agent, a foaming agent, an oil-swellable particle, a water-swellable particle, a thixotropic additive, and any combination thereof.

19. The method of claim 15 wherein contacting the acid-soluble hardened mass with an acid comprises contacting the acid-soluble hardened mass with an aqueous acid composition, wherein the aqueous acid composition comprises hydrochloric acid present in the aqueous acid composition in an amount of about 7.5% to about 28% by weight of the aqueous acid composition.

20. The method of claim 15 wherein the placing the acid-soluble composition comprises placing the acid-soluble composition in a well-bore annulus between a pipe string disposed in the subterranean formation and a wall of a well bore.

21. The method of claim 15 wherein the acid-soluble cement composition is allowed to set in a well-bore annulus in the subterranean formation, wherein the acid contacts the acid-soluble hardened mass through one or more openings in a pipe string disposed in the subterranean formation.

22. The method of claim 15 wherein the acid-soluble cement composition further comprises an acid-soluble filler.

23. A method of cementing comprising:
placing an acid-soluble cement composition in a subterranean formation, the acid-soluble cement composition comprising cement kiln dust and water, wherein the acid-soluble cement composition is free of any acid-soluble fillers;
allowing the acid-soluble cement composition to set to form an acid-soluble hardened mass; and
contacting the acid-soluble hardened mass with an acid.

24. The method of claim 23 wherein the acid-soluble cement composition further comprises a hydraulic cement selected from the group consisting of a Portland cement, a pozzolana cement, a gypsum cement, a high alumina content cement, a slag cement, a silica cement, and any combination thereof.

25. The method of claim 23 wherein the cement kiln dust is present in an amount in a range of from about 1% to 100% by weight of a total amount of cementitious components present in the acid-soluble cement composition.

26. The method of claim 23 wherein the cement kiln dust is present in an amount of about 100% by weight of a total amount of cementitious components present in the acid-soluble cement composition.

27. The method of claim 23 wherein the acid-soluble cement composition is free of any additional cementitious components other than the cement kiln dust.

28. The method of claim 23 wherein the acid-soluble cement composition further comprises an additive selected from the group consisting of a fly ash, a slag cement, metakaolin, shale, zeolite, crystalline silica, amorphous silica, fumed silica, salt, fiber, hydratable clay, microsphere, rice husk ash, an elastomer, an elastomeric particle, a resin, a latex, and any combination thereof.

Assignees

• Benkley James Robert
• Brenneis D Chad
• Roddy Craig W
• Halliburton Energy Serv Inc

Inventors

• Benkley James Robert
• Brenneis D Chad
• Roddy Craig W

Classifications

• C04B14/047

  Zeolites · CPC title

• C04B18/162

  Cement kiln dust; Lime kiln dust · CPC title

• C04B2103/46

  Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents · CPC title

• C04B18/141

  Slags · CPC title

• C04B18/146

  Silica fume · CPC title