Expansive cement

Patent metadata

Field	Value
Publication number	US-2017145288-A1
Application number	US-201415319309-A
Country	US
Kind code	A1
Filing date	Sep 30, 2014
Priority date	Sep 30, 2014
Publication date	May 25, 2017
Grant date	—

Abstract

An expansive cement composition including a Portland cement having a calcium aluminate cement additive and a lithium compound additive is provided. The lithium compound additive is capable of producing expansion in set cements when the temperature is at or below room temperature and minimizes the amount of calcium aluminate cement additive needed.

First claim

What is claimed is:

1 . An expansive cement composition comprising:
a Portland cement, a calcium aluminate cement in an amount from about 0.5% to about 8.0% by weight of said Portland cement; a lithium compound in an amount from about 0.001% to about 0.50% by weight of said Portland cement; and calcium sulfate present in an amount from about 1% to about 15% by weight of said Portland cement.

2 . The composition of claim 1 , wherein said composition, during and after setting, results in at least a 10% increase in volume when setting occurs at a temperature of below 100° F.

3 . The composition of claim 2 , wherein the lithium compound is a lithium salt selected from the group consisting of lithium carbonate, lithium halides, lithium sulfate, hydrates of lithium sulfate, lithium nitrate, lithium hydroxide, and mixtures thereof.

4 . The composition of claim 3 , further comprising calcium hydroxide present in an amount from about 0.1% to about 3.0% by weight of said Portland cement, and sodium bicarbonate present in an amount from about 0.01% to about 1.00% by weight of said Portland cement.

5 . The composition of claim 4 , wherein said calcium aluminate cement is in an amount from about 1.0% to about 5.0% by weight of said Portland cement and said lithium compound is in an amount from about 0.005% to about 0.150% by weight of said Portland cement.

6 . The composition of claim 5 , wherein said calcium aluminate cement is in an amount from 1.5% to 3.5% by weight of said Portland cement and said lithium compound is in an amount from 0.010% to 0.100% by weight of said Portland cement.

7 . The composition of claim 6 , wherein said composition, after setting, results in at least a 17% increase in volume when setting occurs at a temperature of below 60° F.

8 . An expansion additive composition for use in Portland cements comprising:
a calcium aluminate cement in an amount from about 5% to about 50% by weight of the composition; and a lithium compound in an amount from about 0.01% to about 5.00% by weight of the composition.

9 . The composition of claim 8 , further comprising calcium sulfate present in an amount from about 50% to about 80% by weight of the composition.

10 . The composition of claim 8 , further comprising:
calcium hydroxide present in an amount from about 1% to about 20% by weight of the composition; and sodium bicarbonate present in an amount from about 0.1% to about 5.0% by weight of the composition.

11 . The composition of claim 8 , wherein said calcium aluminate cement is in an amount from about 10% to about 40% by weight of the composition and wherein said lithium compound is in an amount from about 0.05% to about 1.00% by weight of the composition.

12 . The composition of claim 8 , wherein said calcium aluminate cement is in an amount from 15% to 35% by weight of the composition and wherein said lithium compound is in an amount from 0.10% to 0.50% by weight of the composition.

13 . The composition of claim 8 , wherein said lithium compound is a lithium salt selected from the group consisting of lithium carbonate, lithium halides, lithium sulfate, hydrates of lithium sulfate, lithium nitrate, lithium hydroxide, and mixtures thereof.

14 . The composition of claim 8 , further comprising calcium sulfate, calcium hydroxide and sodium bicarbonate, and wherein:
said calcium aluminate cement is in an amount from 15% to 35% by weight of the composition; said lithium compound is a lithium salt selected from the group consisting of lithium carbonate, lithium halides, lithium sulfate, hydrates of lithium sulfate, lithium nitrate, lithium hydroxide, and mixtures thereof, and said lithium salt is in an amount from 0.10% to 0.50% by weight of the composition; said calcium sulfate is present in an amount from about 50% to about 80% by weight of the composition; said calcium hydroxide is present in an amount from about 1% to about 20% by weight of the composition; and said sodium bicarbonate is present in an amount from about 0.1% to about 5.0% by weight of the composition.

15 . A method for cementing a casing in a bore of a well having a borehole wall, comprising:
placing a cement slurry composition between the casing and the borehole wall, which composition comprises a Portland cement; a calcium aluminate cement in an amount from about 0.5% to about 8.0% by weight of said Portland cement; and a lithium compound in an amount from about 0.001% to about 0.500% by weight of said Portland cement, and calcium sulfate present in an amount from about 1% to about 15% by weight of said Portland cement; wherein said borehole wall and said casing are at a temperature below about 100° F.

16 . The method of claim 15 , wherein said composition further comprises:
calcium hydroxide present in an amount from about 0.1% to about 3.0% by weight of said Portland cement; and sodium bicarbonate present in an amount from about 0.01% to about 1.00% by weight of said Portland cement.

17 . The method of claim 16 , wherein said calcium aluminate cement is in an amount from about 1.0% to about 5.0% by weight of said Portland Cement, and wherein said lithium compound is in an amount from about 0.005% to about 0.150% by weight of said Portland cement.

18 . The method of claim 17 , wherein said borehole wall and said casing are at a temperature below about 73° F. (23° C.).

19 . The method of claim 18 further comprising mixing the components of the cement composition using mixing equipment.

20 . The method of claim 18 wherein the cement composition is introduced into the wellbore using one or more pumps.

Assignees

• Halliburton Energy Services Inc

Inventors

• Agapiou Kyriacos
• Harris Cody Glenn
• Karcher Jeffery Dwane

Classifications

• C04B40/0042

  Powdery mixtures · CPC title

• C09K8/493

  Additives for reducing or preventing gas migration · CPC title

• C09K8/42

  Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells (compositions for plastering C09K8/50) · CPC title

• C04B28/14

  containing calcium sulfate cements {(gypsum-paper plates E04C)} · CPC title

• C04B28/04 Primary

  Portland cements · CPC title