Drag reducing compositions and methods of manufacture and use
View Patent ↗A drag reducing composition comprising a finely divided, solid polyolefin friction reducing agent formed from olefins containing from 2 to 30 carbon atoms, the polyolefin drag reducing agent suspended in a suspending medium and comprising 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate containing up to 10% by weight of water.
1. A drag reducing composition comprising:
a finely divided, solid polyolefin friction-reducing agent formed from monolefins containing from 2 to 30 carbon atoms;
a suspending medium, said suspending medium comprising 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate containing from about 0 to about 10% by weight water, said suspending medium being present in an amount to provide a flowable suspension of said polyolefin friction-reducing agent.
2. The composition of claim 1 , comprising from about 10 to about 45% by weight friction-reducing agent, and from about 50 to about 80% by weight suspending medium.
3. The composition of claim 1 , comprising from about 0.1 to about 25% by weight of a coating agent.
4. The composition of claim 1 , wherein said polyolefin friction reducing agent is produced by bulk polymerization.
5. The composition of claim 1 , wherein said suspending medium comprises from about 3 to about 7% by weight water.
6. The composition of claim 1 , further comprising:
a biocide.
7. The composition of claim 6 , wherein said biocide is present in an amount of from about 0.01 to about 0.5% by weight.
8. A method of reducing drag in a flowing hydrocarbon stream comprising:
introducing into said hydrocarbon stream an amount of a drag reducing composition sufficient to produce a desired amount of drag reduction, said composition comprising:
a finely divided, solid polyolefin friction-reducing agent formed from monolefins containing from 2 to 30 carbon atoms;
a suspending medium, said suspending medium comprising 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate containing from about 0 to about 10% by weight water, said suspending medium being present in an amount to provide a flowable suspension of said polyolefin friction-reducing agent.
9. The method of claim 8 , comprising from about 10 to about 45% by weight friction-reducing agent, and from about 50 to about 80% by weight suspending medium.
10. The method of claim 8 , comprising from about 0.1 to about 25% by weight of a coating agent.
11. The method of claim 8 , wherein said polyolefin friction reducing agent is produced by bulk polymerization.
12. The method of claim 8 , wherein said suspending medium comprises from about 3 to about 7% by weight water.
13. The method of claim 8 , further comprising:
a biocide.
14. The method of claim 13 , wherein said biocide is present in an amount of from about 0.01 to about 0.5% by weight.
15. The method of claim 8 , wherein said drag reducing composition is added to said hydrocarbon stream in an amount to provide from about 2 to about 500 parts by weight of drag reducing polymer per million parts by weight of hydrocarbon fluid in said hydrocarbon stream.