Weighted elastomers, cement compositions comprising weighted elastomers, and methods of use

• US 8,450,391 B2
• Filed: 06/23/2010
• Issued: 05/28/2013
• Est. Priority Date: 07/29/2009
• Status: Expired due to Fees

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Roddy, Craig W., Karcher, Jeffery D., Morgan, Rickey L., Brenneis, D. Chad
• Primary Examiner(s): Godenschwager, Peter F
• Assistant Examiner(s): KARST, DAVID THOMAS
• Application Number:
  US12/821,514
• Publication Number:
  US 20110028594A1
• Time in Patent Office: 1,070 Days
• Field of Search: 523/130
• US Class Current: 523/130
• CPC Class Codes: C04B 14/16 porous, e.g. pumice
• CPC Class Codes: C04B 14/18 Perlite
• CPC Class Codes: C04B 2103/0049 Water-swellable polymers
• CPC Class Codes: C04B 2103/0061 Block (co-)polymers
• CPC Class Codes: C04B 24/26 obtained by reactions only involving carbon-to-carbon unsaturated bonds C04B24/243 takes precedence
• CPC Class Codes: C04B 24/28 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds C04B24/243 takes precedence
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C09K 8/035 Organic additives
• CPC Class Codes: C09K 8/40 Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses
• CPC Class Codes: C09K 8/467 containing additives for specific purposes
• CPC Class Codes: C09K 8/48 Density increasing or weighting additives
• CPC Class Codes: C09K 8/536 characterised by their form or by the form of their components, e.g. encapsulated material

Abstract

Methods and compositions are provided that relate to weighted elastomers. The weighted elastomers may comprise an elastomer and a weighting agent attached to an outer surface of the elastomer. An embodiment includes a method of cementing that comprises providing a cement composition containing cement, water, and a weighted elastomer. In addition, the cement composition may be introduced into a subterranean formation and allowed to set therein.

Claims

1. A method of cementing comprising:

providing a cement composition that comprises;

cement,

water, and

a weighted elastomer that comprises an elastomer and a weighting agent attached to an outer surface of the elastomer, wherein the weighting agent comprises a material selected from the group consisting of pumicite, perlite, and a combination thereof, and wherein the weighting agent is attached to the outer surface of the elastomer using adhesive; and

allowing the cement composition to set.

2. The method of claim 1 wherein the cement composition is introduced into a subterranean formation and allowed to set therein.

3. The method of claim 1 wherein the cement composition is introduced into a space between a conduit and a subterranean formation and allowed to set therein.

4. The method of claim 3 comprising introducing the conduit into the subterranean formation.

5. The method of claim 1 wherein the cement composition is a heavyweight cement composition having a density of at least about 14 pounds per gallon.

6. The method of claim 1 wherein the cement comprises a hydraulic cement selected from the group consisting of a Portland cement, a pozzolana cement, a gypsum cement, a high-alumina-content cement, a slag cement, a silica cement, and any combination thereof.

7. The method of claim 1 wherein the weighted elastomer is present in an amount of about 0.1% to about 100% by dry weight of cementitious components in the cement composition.

8. The method of claim 1 wherein the elastomer comprises an elastomer selected from the group consisting of polypropylene, polyethylene, styrene divinyl benzene, polyisoprene, polybutadiene, polyisobutylene, polyurethane, a styrene-butadiene random copolymer, a styrene-butadiene block copolymer, acrylonitrile butadiene, acrylonitrile-styrene-butadiene, and any combination thereof.

9. The method of claim 1 wherein the elastomer comprises a styrene-butadiene block copolymer.

10. The method of claim 1 wherein the elastomer comprises a swellable elastomer, and wherein the weighting agent does not fully coat the swellable elastomer.

11. The method of claim 10 wherein the swellable elastomer comprises an oil swellable elastomer selected from the group consisting of natural rubber, polyurethane rubber, nitric rubber, hydrogenated nitrile rubber, acrylate butadiene rubber, polyacrylate rubber, butyl rubber, brominated butyl rubber, chlorinated butyl rubber, chlorinated polyethylene rubber, isoprene rubber, chloroprene rubber, neoprene rubber, butadiene rubber, styrene butadiene copolymer rubber, sulphonated polyethylene, ethylene acrylate rubber, epichlorohydrin ethylene oxide copolymer rubber, ethylene-propylene-copolymer that is peroxide cross-linked, ethylene-propylene-copolymer that is sulphur cross-linked, ethylene-propylene-diene terpolymer rubber, ethylene vinyl acetate copolymer, a fluoro rubber, a fluoro silicone rubber, a silicone rubber, poly 2,2,1-bicyclo heptene (polynorbornene), alkylstyrene, crosslinked substituted vinyl acrylate copolymer, and any combination thereof.

12. The method of claim 10 wherein the swellable elastomer comprises a water swellable elastomer selected from the group consisting of polymethacrylate, polyacrylamide, a non-soluble acrylic polymer, starch-polyacrylate acid graft copolymer and salts thereof, a polyethylene oxide polymer, a carboxymethyl cellulose type polymer, poly(acrylic acid) and salts thereof, poly(acrylic-co-acrylamide) and salts thereof, graft-poly (ethylene oxide) of poly(acrylic acid) and salts thereof, poly(2-hydroxyethyl methacrylate), poly(2-hydroxypropyl methacrylate), polyvinyl alcohol cyclic acid anhydride graft copolymer, isobutylene maleic anhydride, vinylacetate-acrylate copolymer, starch-polyacrylonitrile graft copolymer, and any combination thereof.

13. The method of claim 10 wherein the swellable elastomer is dual oil/water swellable and comprises an oil-swellable material and a water-swellable material.

14. The method of claim 1 wherein the weighting agent comprises the perlite.

15. The method of claim 1 wherein the weighting agent comprises the pumicite.

16. The method of claim 1 wherein the weighted elastomer has a specific gravity of at least about 1.5, wherein the weighted elastomer is present in the cement composition in an amount of about 1% to about 30% by dry weight of cementitious components, and wherein a weight ratio of the weighting agent to the elastomer is about 3:

1 to about 1;

1.

17. The method of claim 1 wherein the cement composition comprises a weighting agent that is not attached to the weighted elastomer.

18. The method of claim 1 wherein the cement composition comprises an additive selected from the group consisting of a strength-retrogression additive, a set accelerator, a set retarder, a weighting agent, a lightweight additive, a gas-generating additive, a mechanical property enhancing additive, a lost-circulation material, a filtration-control additive, a dispersant, a fluid loss control additive, a defoaming agent, a foaming agent, a thixotropic additive, and any combination thereof.

19. The method of claim 1 wherein the cement composition comprises an additive selected from the group consisting of crystalline silica, amorphous silica, fumed silica, salt, fiber, hydratable clay, calcined shale, vitrified shale, a microsphere, fly ash, slag, diatomaceous earth, metakaolin, rice husk ash, natural pozzolan, zeolite, cement kiln dust, lime, a resin, latex, and any combination thereof.

20. The method of claim 1 wherein the weighted elastomer has a specific gravity of at least about 2.

21. The method of claim 1 wherein the adhesive is a water-based acrylic paint, an oil-based paint, or an oil-based primer.

22. A cement composition comprising:

cement,

water, and

a weighted elastomer that comprises an elastomer and a weighting agent attached to an outer surface of the elastomer, wherein the weighting agent comprises a material selected from the group consisting of pumicite, perlite, and a combination thereof, and wherein the weighting agent is attached to the outer surface of the elastomer using an adhesive.

23. The cement composition of claim 22 wherein the cement composition is a heavyweight cement composition having a density of at least about 14 pounds per gallon.

24. The cement composition of claim 22 wherein the cement comprises a hydraulic cement selected from the group consisting of a Portland cement, a pozzolana cement, a gypsum cement, a high-alumina-content cement, a slag cement, a silica cement, and any combination thereof.

25. The cement composition of claim 22 wherein the weighted elastomer is present in an amount of about 0.1% to about 100% by dry weight of cementitious components in the cement composition.

26. The cement composition of claim 22 wherein the elastomer comprises an elastomer selected from the group consisting of polypropylene, polyethylene, styrene divinyl benzene, polyisoprene, polybutadiene, polyisobutylene, polyurethane, a styrene-butadiene random copolymer, a styrene-butadiene block copolymer, acrylonitrile butadiene, acrylonitrile-styrene-butadiene, and any combination thereof.

27. The cement composition of claim 22 wherein the elastomer comprises a styrene-butadiene block copolymer.

28. The cement composition of claim 22 wherein the elastomer comprises a swellable elastomer, and wherein the weighting agent does not fully coat the swellable elastomer.

29. The cement composition of claim 22 wherein the elastomer comprises an oil swellable elastomer selected from the group consisting of natural rubber, polyurethane rubber, nitrile rubber, hydrogenated nitrile rubber, acrylate butadiene rubber, polyacrylate rubber, butyl rubber, brominated butyl rubber, chlorinated butyl rubber, chlorinated polyethylene rubber, isoprene rubber, chloroprene rubber, neoprene rubber, butadiene rubber, styrene butadiene copolymer rubber, sulphonated polyethylene, ethylene acrylate rubber, epichlorohydrin ethylene oxide copolymer rubber, ethylene-propylene-copolymer that is peroxide cross-linked, ethylene-propylene-copolymer that is sulphur cross-linked, ethylene-propylene-diene terpolymer rubber, ethylene vinyl acetate copolymer, a fluoro rubber, a fluoro silicone rubber, a silicone rubber, poly 2,2,1-bicyclo heptene (polynorbornene), alkylstyrene, crosslinked substituted vinyl acrylate copolymer, and any combination thereof.

30. The cement composition of claim 22 wherein the elastomer comprises a water swellable elastomer selected from the group consisting of polymethacrylate, polyacrylamide, a non-soluble acrylic polymer, starch-polyacrylate acid graft copolymer and salts thereof, a polyethylene oxide polymer, a carboxymethyl cellulose type polymer, poly(acrylic acid) and salts thereof, poly(acrylic-co-acrylamide) and salts thereof, graft-poly(ethylene oxide) of poly(acrylic acid) and salts thereof, poly(2-hydroxyethyl methacrylate), poly(2-hydroxypropyl methacrylate), polyvinyl alcohol cyclic acid anhydride graft copolymer, isobutylene maleic anhydride, vinylacetate-acrylate copolymer, starch-polyacrylonitrile graft copolymer, and any combination thereof.

31. The cement composition of claim 22 wherein the elastomer is dual oil/water swellable and comprises an oil-swellable material and a water-swellable material.

32. The cement composition of claim 22 wherein the weighting agent comprises the perlite.

33. The cement composition of claim 22 wherein the weighting agent comprises the pumicite.

34. The cement composition of claim 22 wherein the weighted elastomer has a specific gravity of at least about 1.5, wherein the weighted elastomer is present in the cement composition in an amount of about 1% to about 30% by dry weight of cementitious components, and wherein a weight ratio of the weighting agent to the elastomer is about 3:

1 to about 1;

1.

35. The cement composition of claim 22 wherein the cement composition comprises a weighting agent that is not attached to the weighted elastomer.

36. The cement composition of claim 22 wherein the cement composition comprises an additive selected from the group consisting of a strength-retrogression additive, a set accelerator, a set retarder, a weighting agent, a lightweight additive, a gas-generating additive, a mechanical property enhancing additive, a lost-circulation material, a filtration-control additive, a dispersant, a fluid loss control additive, a defoaming agent, a foaming agent, a thixotropic additive, and any combination thereof.

37. The cement composition of claim 22 wherein the cement composition comprises an additive selected from the group consisting of crystalline silica, amorphous silica, fumed silica, salt, fiber, hydratable clay, calcined shale, vitrified shale, a microsphere, fly ash, slag, diatomaceous earth, metakaolin, rice husk ash, natural pozzolan, zeolite, cement kiln dust, lime, a resin, latex, and any combination thereof.

38. The cement composition of claim 22 wherein the weighted elastomer has a specific gravity of at least about 2.

39. The composition of claim 22 wherein the adhesive is a water-based acrylic paint, an oil-based paint, or an oil-based primer.