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

• US 8,513,330 B2
• Filed: 03/12/2012
• Issued: 08/20/2013
• Est. Priority Date: 07/29/2009
• Status: Active Grant

• 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:
  US13/418,257
• Publication Number:
  US 20120172261A1
• Time in Patent Office: 526 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 comprising:

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

introducing the fluid into a subterranean formation.

2. The method of claim 1 wherein the fluid comprises a fluid selected from the group consisting of a drilling fluid, a completion fluid, a stimulation fluid, a spacer fluid, a well clean-up fluid, and any combination thereof.

3. 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.

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

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

6. The method of claim 5 wherein the swellable 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.

7. The method of claim 5 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.

8. The method of claim 5 wherein the swellable elastomer is dual oil/water swellable and comprises an oil-swellable material and a water-swellable material.

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

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

11. The method of claim 1 wherein the weighted elastomer has a specific gravity of at least about 1.1.

12. The method of claim 1 wherein a weight ratio of the weighting agent to the elastomer is about 3:

1 to about 1;

1.

13. The method of claim 1 wherein the outer surface of the elastomer is at least 10% uncovered by the weighting agent.

14. The method of claim 1 wherein the elastomer comprises a swellable elastomer, the method further comprising contacting the swellable elastomer with a fluid such that the elastomer swells at least 10% in the subterranean formation.

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

16. A method comprising:

providing a fluid that comprises a weighted elastomer having a specific gravity of at least about 1.1, wherein the weighted elastomer comprises an elastomer and a weighting agent attached to an outer surface of the elastomer, wherein the weighting agent is attached to an outer surface of the weighted elastomer using an adhesive, wherein a weight ratio of the weighting agent to the elastomer is about 3;

1 to about 1;

1, wherein the weighting agent comprises a material selected from the group consisting of pumicite, perlite, and a combination thereof, wherein the weighting agent is used in an amount sufficient to prevent floating of the elastomer in the fluid; and

introducing the fluid into a subterranean formation.

17. The method of claim 16 wherein the fluid comprises a fluid selected from the group consisting of a drilling fluid, a completion fluid, a stimulation fluid, a spacer fluid, a well clean-up fluid, and any combination thereof.

18. The method of claim 16 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.

19. The method of claim 16 wherein the elastomer comprises a styrene-butadiene block copolymer.

20. The method of claim 16 wherein the elastomer comprises a swellable elastomer, and wherein the weighting agent does not fully coat the swellable elastomer.

21. The method of claim 20 wherein the swellable 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.

22. The method of claim 20 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.

23. The method of claim 20 wherein the swellable elastomer is dual oil/water swellable and comprises an oil-swellable material and a water-swellable material.

24. The method of claim 16 wherein the adhesive is a water-based acrylic paint, an oil-based paint, or an oil-based primer.

25. A method comprising:

providing a fluid selected from the group consisting of a drilling fluid, a completion fluid, a stimulation fluid, a spacer fluid, a well clean-up fluid, and any combination thereof that comprises a weighted styrene-butadiene block copolymer, wherein the weighted styrene-butadiene block copolymer comprises a weighting agent attached to an outer surface thereof, wherein the weighting agent is attached to an outer surface of the weighted styrene-butadiene block copolymer using an adhesive, wherein the weighting agent comprises a material selected from the group consisting of pumicite, perlite, and a combination thereof, wherein the weighting agent is used in an amount sufficient to prevent floating of the elastomer in the fluid; and

introducing the fluid into a subterranean formation.

26. The method of claim 25 wherein the adhesive is a water-based acrylic paint, an oil-based paint, or an oil-based primer.