Swellable compositions, articles formed therefrom, and methods of manufacture thereof
A swellable composition comprises: a matrix material; and a condensed expandable graphite material disposed in the matrix material. A seal arrangement comprises: a swellable member and a sealing member disposed on a surface of the swellable member; wherein the swellable member comprises a condensed expandable graphite material. The condensed expandable graphite material in the swellable composition and the swellable member has a bulk density of about 1 to about 8 g/cm 3 and comprises expandable graphite.
1. A method of deploying an article, the method comprising:
positioning an article at a predetermined location; the article comprising a composition that contains a matrix material and a condensed expandable graphite material, and wherein the composition has a first shape; and
activating the condensed expandable graphite material to cause the composition to attain a second shape different from the first shape;
wherein the condensed expandable graphite material has a bulk density of about 1 to about 8 g/cm 3 and wherein the condensed expandable graphite material comprises expandable graphite.
2. The method of claim 1 , wherein the composition further comprises an activation material containing one or more of the following: a thermite; Al—Ni; Ti—Si; Ti—B; Zr—Si, Zr—B; Ti—Al; Ni—Mg; or Mg—Bi.
3. The method of claim 2 , wherein the activating comprises exposing the composition to a selected form of energy comprising one or more of the following: electric current; an electromagnetic radiation; or heat.
4. The method of claim 1 , wherein the matrix material is one or more of the following: an ethylene-propylene-diene monomer rubber; a butadiene rubber; a styrene-butadiene rubber; a natural rubber; an acrylonitrile butadiene rubber; a styrene-butadiene-acrylonitrile resin; a butadiene-nitrile rubber; a polyisoprene rubber; an acrylate-butadiene rubber; a polychloroprene rubber; an acrylate-isoprene rubber; an ethylene-vinyl acetate rubber; a polypropylene oxide rubber; a polypropylene sulfide rubber; a fluoroelastomer; or a thermoplastic polyurethane rubber.
5. The method of claim 1 , wherein the condensed expandable graphite material further comprises a binder containing one or more of the following: SiO 2 ; Si; B; B 2 O 3 ; a metal; or a metal alloy; wherein the metal is one or more of the following: aluminum; copper; titanium; nickel; tungsten; chromium; iron; manganese; zirconium; hafnium; vanadium; niobium; molybdenum; tin; bismuth; antimony; lead; cadmium; or selenium.
6. The method of claim 5 , wherein the condensed expandable graphite material comprises about 20 to about 95 wt. % of the expandable graphite and about 5 to about 80 wt. % of the binder.
7. The method of claim 1 , wherein the condensed expandable graphite material comprises particles having an average particle size of about 10 microns to about 5 centimeters.
8. The method of claim 1 further comprising disposing a microwave source in the vicinity of the article, wherein the microwave source is effective to generate a microwave energy to heat and expand the composition.
9. The method of claim 1 , wherein the method further comprises isolating or completing a wellbore by deploying the article in the wellbore.
10. The method of claim 1 , the method comprising:
positioning a tubing at a downhole location; wherein the article is disposed on a surface of the tubing;
exposing the article to a microwave energy to cause the article to expand to isolate or complete a wellbore.
11. The method of claim 10 , further comprising disposing a microwave source in the tubing.
12. The method of claim 1 , wherein the activating comprises at least one of the following: exposing the composition to a microwave energy; or heating the composition.
13. A method of making a composition, the method comprising combing a condensed expandable graphite material with a matrix material, wherein the condensed expandable graphite material has a bulk density of about 1 to about 8 g/cm 3 and comprises expandable graphite.
14. The method of claim 13 , wherein the combing comprises dry blending; melt blending; or a combination thereof.
15. The method of claim 13 comprising:
compressing expandable graphite having a tapped density of about 0.005 to about 1 g/cm 3 to provide a condensed expandable graphite bulk material;
breaking the condensed expandable graphite bulk material into condensed expandable graphite particles, wherein the condensed expandable graphite particles have a tapped density of about 0.1 to about 2 g/cm 3 ; and
combining the condensed expandable graphite particles with the matrix material.
16. The method of claim 13 comprising:
compressing a mixture of expandable graphite having a tapped density of about 0.005 to about 1 g/cm 3 and a binder to provide a condensed expandable graphite bulk material;
breaking the condensed expandable graphite bulk material into condensed expandable graphite particles, wherein the condensed expandable graphite particles have a tapped density of about 1 to about 5 g/cm 3 ; and
combining the condensed expandable graphite particles with the matrix material.
17. A method of forming an article, the method comprising shaping or machining a composition comprising a matrix material and a condensed expandable graphite material, the condensed expandable graphite material having a bulk density of about 1 to about 8 g/cm 3 and comprising expandable graphite.
18. The method of claim 17 , wherein the matrix material is an elastic material.
19. The method of claim 17 , wherein the article is a swellable article.
20. The method of claim 17 , wherein the article is a seal; a high pressure beaded frac screen plug; a screen basepipe plug; a coating for balls and seats; a gasket; a compression packing element; an expandable packing element; an O-ring; a bonded seal; a bullet seal; a sub-surface safety valve seal; a sub-surface safety valve flapper seal; a dynamic seal; a V-ring; a back-up ring; a drill bit seal; a liner port plug; an atmospheric disc; an atmospheric chamber discs; a debris barrier; a drill in stim liner plug; an inflow control device plug; a flapper; a seat; a ball seat; a direct connect disk; a drill-in linear disk; a gas lift valve plug; a fluid loss control flapper; an electric submersible pump seal; a shear out plug; a flapper valve; a gaslift valve; or a sleeve.