Co-grinding slag with other material for hydraulic binders

Patent metadata

Field	Value
Publication number	US-2019031942-A1
Application number	US-201616072133-A
Country	US
Kind code	A1
Filing date	Mar 31, 2016
Priority date	Mar 31, 2016
Publication date	Jan 31, 2019
Grant date	—

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 method of cementing comprising:
providing a cement composition comprising: water, a cement, and a slag co-grind, wherein the slag co-grind comprises slag and a cement component; introducing the cement composition into a subterranean formation; and allowing the cement composition to set in the subterranean formation.

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

3 . The method 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 . The method of claim 1 , wherein the cement component is selected from the group consisting of metakaolin, shale, perlite, pozzolan, zeolite, calcium aluminate cement, wollastonite, and combinations thereof.

5 . The method of claim 1 , 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.

6 . The method of claim 1 , 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

7 . The method of claim 1 , further comprising grinding the slag co-grind in a ball mill.

8 . The method of claim 7 , wherein the ball mill comprises a ball charge comprising balls of different sizes.

9 . The method of claim 1 , 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.

10 . The method of claim 1 , wherein the slag co-grind is further separated by sieving after grinding.

11 . The method of claim 1 , wherein the slag co-grind further comprises a basic material.

12 . The method of claim 1 , further comprising dry blending the slag co-grind and the cement.

13 . A cement composition comprising;
water; a cement; and a slag co-grind comprising slag and a cement component.

14 . The composition of claim 13 , wherein the cement component is selected from the group consisting of metakaolin, shale, perlite, pozzolan, zeolite, aluminum silicate, wollastonite, and combinations thereof.

15 . The composition of claim 13 , wherein the slag co-grind has a particle size of about 1 nanometer to about 1 micron.

16 . The composition of claim 13 , wherein the slag co-grind is present in an amount of about 1% to about 99% by weight of cementitious components.

17 . A system for cementing in a subterranean formation comprising:
a cement composition comprising a cement, water, and a slag co-grind, wherein the slag co-grind comprises slag and a cement component; mixing equipment capable of mixing the cement composition; and pumping equipment capable of delivering the cement composition into a wellbore.

18 . The system of claim 17 , wherein the cement component is selected from the group consisting of metakaolin, shale, perlite, pozzolan, zeolite, aluminum silicate, wollastonite, and combinations thereof.

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

20 . The system of claim 17 , wherein the slag co-grind is present in an amount of about 1% to about 99% by weight of cement.

Assignees

• Halliburton Energy Services Inc

Inventors

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

Classifications

• C09K8/467 Primary

  containing additives for specific purposes · CPC title

• C09K8/46 Primary

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

• E21B33/13

  Methods or devices for cementing, for plugging holes, crevices or the like · CPC title

• C09K2208/10

  Nanoparticle-containing well treatment fluids · CPC title

• C04B14/043 Primary

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