Co-grinding slag with other material for hydraulic binders

Patent metadata

Field	Value
Publication number	US-10975285-B2
Application number	US-202016875958-A
Country	US
Kind code	B2
Filing date	May 15, 2020
Priority date	Mar 31, 2016
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

A variety of systems, methods and compositions are disclosed for cementing in subterranean formations. Embodiments may include the use of slag co-grind in well cementing operations.

First claim

What is claimed is:

1. A cement composition comprising;
water;
a cement; and
a slag co-grind consisting of slag and a cement component selected from the group consisting of perlite, calcium aluminate cement, and combinations thereof, wherein the slag is a by-product from processing of a metal ore.

2. The composition of claim 1 , wherein the slag co-grind has a particle size of about 1 nanometer to about 1 micron.

3. The composition of claim 1 , wherein the slag co-grind is present in an amount of about 1% to about 99% by weight of cementitious components.

4. A method comprising:
providing a slag co-grind comprising slag and at least one cement component selected from the group consisting of metakaolin, shale, perlite, pozzolan, zeolite, calcium aluminate cement, and combinations thereof, wherein the slag is a by-product from processing of a metal ore;
dry blending the slag co-grind and a cement to form a cement dry blend; and
preparing a cement composition comprising water and the cement dry blend.

5. The method of claim 4 , wherein the slag co-grind has a final particle size of about 1 nanometer to about 1 micron.

6. The method of claim 4 , wherein the slag co-grind is present in an amount of about 1% to about 99% by weight of cementitious components.

7. The method of claim 4 , wherein the step of introducing the cement composition into a subterranean formation comprises introducing the cement composition into a wellbore annulus in a primary cementing operation.

8. The method of claim 4 , wherein the cement composition further comprises at least one component selected from the group consisting of strength-retrogression additives, set accelerators, set retarders, weighting agents, lightweight additives, gas-generating additives, mechanical property enhancing additives, lost-circulation materials, filtration-control additives, dispersants, a fluid loss control additive, defoaming agents, foaming agents, thixotropic additives, and combinations thereof.

9. The method of claim 4 , further comprising grinding the slag co-grind in a ball mill.

10. The method of claim 9 , wherein the ball mill comprises a ball charge comprising balls of different sizes.

11. The method of claim 4 , further comprising grinding the slag co-grind in a grinder selected from the group consisting of rod mill, autogenous mill, semi-autogenous mill, pebble mill, high pressure grinding roll, buhrstone mill, vertical shaft impactor mill, and tower mill.

12. The method of claim 4 , wherein the slag co-grind is further separated by sieving after grinding.

13. The method of claim 4 , wherein the slag co-grind further comprises a basic material.

14. A method comprising:
first, co-grinding a composition comprising slag and at least one cement component selected from the group consisting of metakaolin, shale, perlite, pozzolan, zeolite, calcium aluminate cement, and combinations thereof, to form a slag co-grind, wherein the slag is a by-product from processing of a metal ore; and
second, dry blending the slag co-grind and a cement to form a cement dry blend.

15. The method of claim 14 , wherein the cement dry blend further comprises at least one component selected from the group consisting of strength-retrogression additives, set accelerators, set retarders, weighting agents, lightweight additives, gas-generating additives, mechanical property enhancing additives, lost-circulation materials, filtration-control additives, dispersants, a fluid loss control additive, defoaming agents, foaming agents, thixotropic additives, and combinations thereof.

16. The method of claim 14 , wherein the slag co-grind is present in an amount of about 1% to about 99% by weight of the cement.

17. The method of claim 14 , wherein the slag co-grind has a particle size of about 1 nanometer to about 1 micron.

18. The method of claim 14 further comprising preparing a cement composition comprising water and the cement dry blend.

19. The method of claim 18 further comprising placing the cement composition in a wellbore.

Assignees

• Halliburton Energy Services Inc

Inventors

• Chatterji Jiten
• Brenneis Darrell Chad
• Benkley James Robert
• Hundt Gregory Robert

Classifications

• C04B28/08 Primary

  Slag cements · CPC title

• C09K2208/10

  Nanoparticle-containing well treatment fluids · CPC title

• C09K8/46 Primary

  containing inorganic binders, e.g. Portland cement · CPC title

• C04B2103/0088

  Compounds chosen for their latent hydraulic characteristics, e.g. pozzuolanes · CPC title

• C04B14/043 Primary

  Alkaline-earth metal silicates, e.g. wollastonite · CPC title