Vulcanized oil and water swellable particulate composite compositions

Patent metadata

Field	Value
Publication number	US-10336933-B2
Application number	US-201715788562-A
Country	US
Kind code	B2
Filing date	Oct 19, 2017
Priority date	Oct 30, 2013
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

Embodiments herein include a method comprising providing a self-sealing cement slurry comprising an aqueous base fluid, a cementitious material, and a vulcanized oil and water swellable particulate composite, wherein the vulcanized oil and water swellable particulate composite comprises an elastomer, a crosslinked water swellable superabsorbent polymer, and a hydrophobically modified water-soluble polymer; introducing the self-sealing cement slurry into a subterranean formation; and allowing the self-sealing cement slurry to set, wherein the vulcanized oil and water swellable particulate composite is capable of swelling in the presence of a non-aqueous fluid and an aqueous fluid to reduce the permeability of fluid flowpaths in the set self-sealing cement slurry upon loss of structural integrity.

First claim

The invention claimed is:

1. A vulcanized oil and water swellable particulate composite comprising:
an elastomer, a crosslinked water swellable superabsorbent polymer, and a hydrophobically modified water-soluble polymer,
wherein the elastomer comprises a non-polar monomer, a polar monomer, and an ionizable polar monomer, and
wherein the vulcanized oil and water swellable particulate composite is capable of swelling in the presence of a non-aqueous fluid and an aqueous fluid.

2. The composite of claim 1 , wherein the non-polar monomer is selected from the group consisting of a diene; a substituted diene; an alpha-olefin; and any combination thereof.

3. The composite of claim 1 , wherein the polar monomer is non-ionic.

4. The composite of claim 1 , wherein the polar monomer is selected from the group consisting of an acrylonitrile; a N-alkoxyalkyl acrylamide; a vinyl acetate; a vinylformamide; a vinyl acetamide; a vinyl methyl ether; a vinyl pyrrolidone; an acrylate; a vinyl siloxane; and any combination thereof.

5. The composite of claim 1 , wherein the polar monomer is capable of generating a carboxylate group.

6. The composite of claim 1 , wherein the ionizable polar monomer is selected from the group consisting of a carboxylic acid; a carboxylic acid derivative; a salt of carboxylic acid; a sulfonic acid; a salt of sulfonic acid; and any combination thereof.

7. The composite of claim 1 , wherein the hydrophobically modified water-soluble polymer is formed by hydrophobic modification of a hydrophilic polymer.

8. The composite of claim 1 , wherein the hydrophobically modified water-soluble polymer is formed by a polymerization reaction of a hydrophilic monomer and a hydrophobically modified hydrophilic monomer.

9. The composite of claim 1 , wherein the vulcanized oil and water swellable particulate composite further comprises a polyvalent metal oxide; a reinforcing material; and any combination thereof.

10. A vulcanized oil and water swellable particulate composite comprising:
an elastomer, a crosslinked water swellable superabsorbent polymer, and a hydrophobically modified water-soluble polymer,
wherein the elastomer comprises a non-polar monomer, a polar monomer, and an ionizable polar monomer,
wherein the vulcanized oil and water swellable particulate composite is capable of swelling in the presence of a non-aqueous fluid and an aqueous fluid, and
wherein the crosslinked water swellable superabsorbent polymer is selected from the group consisting of a crosslinked polyacrylate-based polymer; a crosslinked polyacrylamide-based polymer; a crosslinked polyvinyl alcohol polymer; a crosslinked starch-polyacrylonitrile graft polymer; any copolymer thereof; any terpolymer thereof; and any combination thereof.

11. The composite of claim 10 , wherein the non-polar monomer is selected from the group consisting of a diene; a substituted diene; an alpha-olefin; and any combination thereof.

12. The composite of claim 10 , wherein the polar monomer is non-ionic.

13. The composite of claim 10 , wherein the polar monomer is selected from the group consisting of an acrylonitrile; a N-alkoxyalkyl acrylamide; a vinyl acetate; a vinylformamide; a vinyl acetamide; a vinyl methyl ether; a vinyl pyrrolidone; an acrylate; a vinyl siloxane; and any combination thereof.

14. The composite of claim 10 , wherein the polar monomer is capable of generating a carboxylate group.

15. The composite of claim 10 , wherein the ionizable polar monomer is selected from the group consisting of a carboxylic acid; a carboxylic acid derivative; a salt of carboxylic acid; a sulfonic acid; a salt of sulfonic acid; and any combination thereof.

16. The composite of claim 10 , wherein the hydrophobically modified water-soluble polymer is formed by hydrophobic modification of a hydrophilic polymer.

17. The composite of claim 10 , wherein the hydrophobically modified water-soluble polymer is formed by a polymerization reaction of a hydrophilic monomer and a hydrophobically modified hydrophilic monomer.

18. The composite of claim 10 , wherein the vulcanized oil and water swellable particulate composite further comprises a polyvalent metal oxide; a reinforcing material; and any combination thereof.

Assignees

• Halliburton Energy Services Inc

Inventors

• Reddy B Raghava
• Liang Feng
• Morgan Ronnie G

Classifications

• C04B14/30

  Oxides other than silica {(ferrites C04B14/363)} · CPC title

• C09K8/467 Primary

  containing additives for specific purposes · CPC title

• C04B24/383

  Cellulose or derivatives thereof · CPC title

• E21B33/14

  for cementing casings into boreholes · CPC title

• C04B24/161

  Macromolecular compounds comprising sulfonate or sulfate groups · CPC title