Magnesium chloride in alcoholic solvent for sorel cement

Patent metadata

Field	Value
Publication number	US-9617460-B2
Application number	US-201213622006-A
Country	US
Kind code	B2
Filing date	Sep 18, 2012
Priority date	Sep 18, 2012
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A non-hydraulic cement composition including: (i) a non-aqueous liquid phase comprising one or more organic compounds characterized by: (a) having at least one hydroxyl group on a carbon atom, (b) being a liquid when pure under Standard Laboratory Conditions, and (c) being at least soluble in water; (ii) one or more magnesium chloride compounds selected from the group consisting of: magnesium chloride, a magnesium chloride hydrate, and any combination thereof; and (iii) magnesium oxide; wherein the one or more organic compounds comprise at least 40% by weight of the non-aqueous liquid phase excluding the weight of any dissolved solids. A method of treating a well including the steps of: (A) forming the non-hydraulic cement composition; and (B) introducing the non-hydraulic cement composition into the well.

First claim

What is claimed is:

1. A method of treating a well, the method comprising the steps of:
(A) forming a non-hydraulic cement composition comprising:
(i) a non-aqueous liquid phase comprising one or more organic compounds characterized by:
(a) having at least one hydroxyl group on a carbon atom,
(b) being a liquid when pure under Standard Laboratory Conditions, and
(c) being at least soluble in water;

(ii) one or more magnesium chloride compounds selected from the group consisting of: magnesium chloride, a magnesium chloride hydrate, and any combination thereof; and
(iii) magnesium oxide;
wherein the one or more organic compounds comprises at least 40% by weight of the non-aqueous liquid phase excluding the weight of any dissolved solids; and

(B) introducing the non-hydraulic cement composition into the well.

2. The method according to claim 1 , wherein:
the one or more magnesium chloride compounds are dissolved in the non-aqueous phase at a concentration of at least 50 g/l based on the volume of the one or more organic compounds in the liquid phase; and
the ratio of the magnesium oxide to the magnesium chloride compounds is at least 1.0 magnesium oxide: 1 magnesium chloride compounds by weight.

3. The method according to claim 1 , wherein the one or more organic compounds are additionally characterized by dissolving magnesium chloride to at least 100 g/l under Standard Laboratory Conditions.

4. The method according to claim 1 , wherein the non-aqueous liquid phase comprises less than 1% water by weight excluding the weight of any dissolved solids.

5. The method according to claim 1 , wherein the non-aqueous liquid phase is essentially dry.

6. The method according to claim 1 , wherein the non-aqueous liquid phase is the continuous phase of the non-hydraulic cement composition.

7. The method according to claim 6 , wherein the non-hydraulic cement composition is not an emulsion with an aqueous phase.

8. The method according to claim 1 , wherein the one or more organic compounds are not surfactants.

9. The method according to claim 1 , wherein the non-aqueous liquid phase comprises less than 0.1% of surfactants by weight based on the combined weight of magnesium chloride compounds and magnesium oxide.

10. The method according to claim 1 , wherein the non-hydraulic cement composition comprises less than 1% hydraulic cement by weight based on the by combined weight of magnesium chloride compounds and magnesium oxide.

11. The method according to claim 1 , wherein the step of introducing further comprises directing or allowing the non-hydraulic cement composition to meet with an aqueous fluid, thereby causing the one or more magnesium chloride compounds and the magnesium oxide to mix with water and set.

12. A method of treating a well, the method comprising the steps of:
(A) forming a non-hydraulic cement composition comprising:
(i) a non-aqueous liquid phase comprising one or more organic compounds characterized by:
(a) having at least one hydroxyl group on a carbon atom,
(b) being a liquid when pure under Standard Laboratory Conditions, and
(c) being at least soluble in water;

(ii) one or more magnesium chloride compounds selected from the group consisting of: magnesium chloride, a magnesium chloride hydrate, and any combination thereof; and
(iii) magnesium oxide;
wherein the one or more organic compounds comprises at least 40% by weight of the non-aqueous liquid phase excluding the weight of any dissolved solids;
wherein the one or more magnesium chloride compounds are dissolved in the non-aqueous liquid phase; and

(B) introducing the non-hydraulic cement composition into the well.

Assignees

• Halliburton Energy Services Inc

Inventors

• Reddy B Raghava

Classifications

• C09K8/46 Primary

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

• C04B28/32

  Magnesium oxychloride cements, e.g. Sorel cement · CPC title

• C04B2103/0093

  Organic cosolvents · CPC title

• C04B24/02

  Alcohols; Phenols; Ethers · CPC title