Pumice-Containing Remedial Compositions and Methods of Use

• US 20140318764A1
• Filed: 12/30/2013
• Published: 10/30/2014
• Est. Priority Date: 04/30/2013
• Status: Active Grant

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Chatterji, Jiten, Brenneis, D. Chad, Benkley, James R.
• Granted Patent: US 8,910,708 B2
• Time in Patent Office: Days
• US Class Current: 166/177.4
• CPC Class Codes: C04B 14/047 Zeolites
• CPC Class Codes: C04B 14/108 Shale, slate colliery shale C04B18/125
• CPC Class Codes: C04B 14/16 porous, e.g. pumice
• CPC Class Codes: C04B 14/18 Perlite
• CPC Class Codes: C04B 16/085 expanded in situ, i.e. during or after mixing the mortar, concrete or artificial stone ingredients
• CPC Class Codes: C04B 18/08 Flue dust , i.e. fly ash
• CPC Class Codes: C04B 18/101 Burned rice husks or other burned vegetable material
• CPC Class Codes: C04B 18/146 Silica fume
• CPC Class Codes: C04B 2111/1037 Cement free compositions, e.g. hydraulically hardening mixtures based on waste materials, not containing cement as such
• CPC Class Codes: C04B 28/18 containing mixtures of the silica-lime type
• CPC Class Codes: C09K 8/428 for squeeze cementing, e.g. for repairing
• CPC Class Codes: C09K 8/467 containing additives for specific purposes
• CPC Class Codes: E21B 33/13 Methods or devices for cementing, for plugging holes, crevices or the like
• CPC Class Codes: E21B 33/138 Plastering the borehole wall; Injecting into the formation
• CPC Class Codes: Y02W 30/91 Use of waste materials as fillers for mortars or concrete

Abstract

Systems for remedial cementing are provided that utilize pumice and various additives. One of the systems for remedial cementing embodiments comprises a lightweight settable composition comprising pumice, a calcium activator, and water, wherein the lightweight settable composition has a density of less than about 13.5 pounds per gallon; mixing equipment for mixing the lightweight settable composition; and pumping equipment for delivering the lightweight settable composition to a well bore.

Claims

1. A remedial cementing system for sealing one or more voids in a well bore comprising:

a lightweight settable composition comprising pumice, a calcium activator, and water, wherein the water is present in an amount in a range of from about 40% to about 200% by weight of the pumice, wherein the lightweight settable composition has a density of less than about 13.5 pounds per gallon;

mixing equipment for mixing the lightweight settable composition; and

pumping equipment for delivering the lightweight settable composition to the one or more voids in the well bore.

3. The system of claim 1, wherein the mixing equipment is configured for mixing the pumice, calcium activator, and water;

and wherein the pumping equipment is configured for pumping the lightweight settable composition through a pipe string in the well bore.

5. The system of claim 1, wherein the calcium activator is present in an amount of about 0.1% to about 25% by weight of the pumice.

6. The system of claim 1, wherein the calcium activator comprises a material selected from the group consisting of calcium formate, lime, hydrated lime, and any combination thereof.

8. The system of claim 1, wherein the lightweight settable composition further comprises at least one additive selected from the group consisting of shale, zeolite, amorphous silica, fly ash, metakaolin, perlite, rice hull hush, a swellable particulate elastomer, and any combination thereof.

9. The system of claim 8, wherein the at least one additive is present in an amount in a range of from about 0.1% to about 100% by weight of the pumice.

10. The system of claim 8, wherein the at least one additive present in an amount in a range of from about 50% to about 100% by weight of the pumice.

11. The system of claim 1, wherein the lightweight settable composition further comprises shale in an amount of about 40% to about 100% by weight of the pumice, and wherein the lightweight settable composition further comprises zeolite in an amount of about 40% to about 100% by weight of the pumice.

12. The system of claim 1, wherein the lightweight settable composition further comprises metakaolin in an amount of about 40% to about 100% by weight of the pumice.

13. The system of claim 1, wherein the lightweight settable composition is foamed using a foaming additive and a gas.

14. The system of claim 1, wherein the lightweight settable composition is free of any additional cementitious components.

2. (canceled)

4. (canceled)

7. (canceled)

15. A remedial cementing system for sealing one or more voids in a well bore comprising:

a lightweight settable composition comprising pumice, a calcium activator in an amount of about 0.1% to about 25% by weight of the pumice, and water in an amount in a range of from about 40% to about 200% by weight of the pumice, wherein the lightweight settable composition has a density of less than about 13.5 pounds per gallon;

mixing equipment for mixing the lightweight settable composition; and

pumping equipment for delivering the lightweight settable composition to the one or more voids in the well bore.

16. The system of claim 15, wherein the calcium activator comprises a material selected from the group consisting of calcium formate, lime, hydrated lime, and any combination thereof.

17. The system of claim 15, wherein the lightweight settable composition further comprises at least one additive selected from the group consisting of shale, zeolite, amorphous silica, fly ash, metakaolin, perlite, rice hull hush, a swellable particulate elastomer, and any combination thereof.

22. The system of claim 15, wherein the lightweight settable composition further comprises shale in an amount of about 40% to about 100% by weight of the pumice, and wherein the lightweight settable composition further comprises zeolite in an amount of about 40% to about 100% by weight of the pumice.

23. The system of claim 15, wherein the mixing equipment is configured for mixing the pumice, calcium activator, and water;

and wherein the pumping equipment is configured for pumping the lightweight settable composition through a pipe string in the well bore.

18. A remedial cementing system for sealing one or more voids in a well bore comprising:

a lightweight settable composition comprising pumice, a calcium activator in an amount of about 0.1% to about 25% by weight of the pumice, and water in an amount in a range of from about 40% to about 200% by weight of the pumice, wherein the lightweight settable composition has a density of less than about 13.5 pounds per gallon, wherein the lightweight settable composition is free of Portland cement, and wherein the composition is foamed using a foaming additive and a gas;

mixing equipment for mixing the lightweight settable composition; and

pumping equipment for delivering the lightweight settable composition to the one or more voids in the well bore.

19. The system of claim 18, wherein the lightweight settable composition further comprises shale in an amount of about 40% to about 100% by weight of the pumice, and wherein the lightweight settable composition further comprises zeolite in an amount of about 40% to about 100% by weight of the pumice.

20. The system of claim 18, wherein the lightweight settable composition further comprises metakaolin in an amount of about 40% to about 100% by weight of the pumice.

21. The system of claim 18, wherein the lightweight settable composition further comprises at least one additive selected from the group consisting of shale, zeolite, amorphous silica, fly ash, metakaolin, perlite, rice hull hush, a swellable particulate elastomer, and any combination thereof.