Wellbore servicing compositions comprising a density segregation inhibiting composite and methods of making and using same
A method of servicing a wellbore comprising placing a wellbore servicing fluid comprising a density segregation inhibitor composite into the wellbore, wherein the density segregation inhibitor composite comprises a high density additive and a low density additive; and wherein the high density additive comprises barium sulfate, iron oxide, manganese oxide, or combinations thereof. A method of inhibiting segregation of particles in a wellbore servicing fluid comprising preparing a composite material comprising a high density additive and a low density additive, wherein the low density additive comprises an elastomer which can increase in volume by greater than about 300% based on its original volume when contacted with a fluid.
1. A method of servicing a wellbore comprising
placing a wellbore servicing fluid comprising a density segregation inhibitor composite having a specific gravity of from about 0.8 to about 4.5 into the wellbore; wherein the density segregation inhibitor composite comprises a high density additive associated with a low density additive; wherein the high density additive comprises barium sulfate, iron oxide, manganese oxide, or combinations thereof and wherein the low density additive has a phase transition temperature of from about 100° F. to about 700° F.
2. The method of claim 1 wherein the high density additive has a specific gravity of from about 2.6 to about 7.
3. The method of claim 1 wherein the high density additive comprises calcium carbonate, siderite, ilmenite, or combinations thereof.
4. The method of claim 1 wherein the low density additive has a specific gravity of from about 0.6 to about 2.6.
5. The method of claim 4 wherein the low density additive comprises an elastomer, thermoplastic elastomer, dienes, butadiene, isoprene, hexadiene, monoolefins, ethylene, butenes, 1-hexene, styrene butadiene random copolymer, styrene butadiene block copolymer, styrene butadiene styrene block copolymer, hydrogenated styrene butadiene rubber, or combinations thereof.
6. The method of claim 1 wherein the density segregation inhibitor composite is prepared by melt-mixing the high density and low density additive.
7. The method of claim 1 wherein the density segregation inhibitor composite is prepared by forming the low density additive in the presence of the high density additive.
8. The method of claim 1 wherein the density segregation inhibitor composite is prepared by chemically bonding the high density and low density additive.
9. The method of claim 1 wherein the density segregation inhibitor composite is present in the wellbore servicing fluid in an amount of from about 2 wt. % to about 70 wt. % based on the total weight of the wellbore servicing fluid.
10. The method of claim 1 wherein the wellbore servicing fluid comprises cement.
11. The method of claim 10 wherein the cement is present in the wellbore servicing fluid in an amount of from about 35 wt. % to about 80 wt. % based on the total weight of the wellbore servicing fluid.
12. The method of claim 10 wherein the wellbore servicing fluid has vertical variation in density when placed in the wellbore of from about 0.1% to about 5% when compared to an otherwise similar wellbore servicing fluid lacking the density segregation inhibitor composite.
13. The method of claim 10 wherein the wellbore servicing fluid has a compressive strength of from about 100 psi to about 15000 psi.
14. The method of claim 10 wherein the wellbore servicing fluid has a tensile strength of from about 10 psi to about 1500 psi.
15. The method of claim 10 wherein the wellbore servicing fluid has a Young's Modulus of from about 0.01×10 5 psi to about 4.6×10 6 psi.
16. The method of claim 10 wherein the wellbore servicing fluid has a Poisson's Ratio of from about 0.05 to about 0.4.
17. A method of inhibiting segregation of particles in a wellbore servicing fluid comprising preparing a composite material comprising a high density additive associated with a low density additive, wherein the low density additive comprises an elastomer which can increase in volume by greater than about 300% based on its original volume when contacted with a fluid and wherein the composite material has a specific gravity of from about 0.8 to about 4.5.
18. A method of servicing a wellbore comprising
placing a lightweight cement composition comprising a density segregation inhibitor composite into the wellbore; and
allowing the cement composition to set wherein the lightweight cement has a density of from about 5 ppg to about 12 ppg; wherein the density segregation inhibitor composite comprises a high density additive associated with a low density additive; and wherein the high density additive comprises barium sulfate, iron oxide, manganese oxide, or combinations thereof.
19. The method of claim 18 wherein the low density additive comprises a thermoplastic elastomer.
20. The method of claim 18 wherein the low density additive comprises a polyolefin grafted with polar monomers.