Effective pour point depressants for amidoamine emulsifiers
A composition comprising an oleaginous base fluid, an emulsifier and a liquid tertiary amide is disclosed. A wellbore fluid may include an oleaginous continuous phase, a non-oleaginous discontinuous phase and the composition to stabilize the non-oleaginous discontinuous phase within the oleaginous continuous phase. A method comprising adding the composition to a wellbore fluid and emplacing the wellbore fluid mixed with the composition into a wellbore is also provided.
1. A composition, comprising:
an oleaginous base fluid;
an emulsifier; and
a liquid tertiary amide, wherein the liquid tertiary amide is selected from the group of cyclic or acyclic liquid tertiary amides.
2. The composition of claim 1 , wherein the liquid tertiary amide has the formula R 1 —CO—NR 2 R 3 , where R 1 , R 2 and R 3 are the same or different.
3. The composition of claim 2 , wherein any of the R 1 , R 2 and R 3 groups of the liquid tertiary amide has at least 5 carbon atoms.
4. The composition of claim 3 , wherein R 1 is selected from C 5 -C 16 saturated and unsubstituted hydrocarbon chains.
5. The composition of claim 3 , wherein R 1 is selected from C 5 -C 20 unsaturated and branched hydrocarbon chains.
6. The composition of claim 3 , wherein the liquid tertiary amide is selected from the group of N,N-dimethylamides.
7. The composition of claim 2 , wherein R 1 and R 2 are connected or R 2 and R 3 are connected.
8. A composition, comprising:
an oleaginous base fluid;
an emulsifier; and
a liquid tertiary amide, wherein the liquid tertiary amide is a tetrasubstituted urea selected from the group of acyclic and cyclic tetrasubstituted ureas.
9. A method comprising:
adding a composition to a wellbore fluid, the composition comprising an oleaginous base fluid;
an emulsifier; and
a liquid tertiary amide; and
emplacing the wellbore fluid mixed with the composition into a wellbore,
wherein the liquid tertiary amide is selected from the group of cyclic or acyclic liquid tertiary amides.
10. The method of claim 9 , wherein the liquid tertiary amide has the formula R 1 —CO—NR 2 R 3 , where R 1 , R 2 and R 3 are the same or different.
11. The method of claim 10 , wherein any of the R 1 , R 2 and R 3 groups of the liquid tertiary amide has at least 5 carbon atoms.
12. The method of claim 10 , wherein R 1 is selected from C 5 -C 16 saturated and unsubstituted hydrocarbon chains.
13. The method of claim 10 , wherein R 1 is selected from C 5 -C 20 unsaturated and branched hydrocarbon chains.
14. The method of claim 10 , wherein the liquid tertiary amide is selected from the group of N, N-dimethylamides.
15. The method of claim 10 , wherein R 1 and R 2 are connected or R 2 and R 3 are connected.
16. A method comprising:
adding a composition to a wellbore fluid, the composition comprising an oleaginous base fluid;
an emulsifier; and
a liquid tertiary amide; and
emplacing the wellbore fluid mixed with the composition into a wellbore,
wherein the liquid tertiary amide is a tetrasubstituted urea selected from the group of acyclic and cyclic tetrasubstituted ureas.
17. The method of claim 12 , wherein the liquid tertiary amide is present in the composition in a proportion that ranges from 0 to 30% by weight, based on the weight of the emulsifier.