Additive to decrease the pour point of paraffin inhibitors

Patent metadata

Field	Value
Publication number	US-11084970-B2
Application number	US-201716645643-A
Country	US
Kind code	B2
Filing date	Dec 4, 2017
Priority date	Dec 4, 2017
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

Included are compositions, methods, and systems for producing and using winterized paraffin inhibitor solutions. An example composition comprises a paraffin inhibitor solution; and an additive comprising a first portion and a second portion; wherein the first portion is selected from the functional groups consisting of sulfo, phosphate, phosphonate, ester, carboxyl, hydroxyl, and any combination thereof; wherein the second portion is selected from the functional groups consisting of linear alkyl, branched alkyl, alkyl phenyl, ethoxylated branched alkyl, propoxylated branched alkyl, and any combination thereof.

First claim

What is claimed is:

1. A method for reducing paraffin deposition comprising:
preparing a winterized paraffin inhibitor solution by introducing an additive to a paraffin inhibitor solution;
wherein the additive is selected from the group consisting of methanesulfonic acid, ethanesulfonic acid, nonylphenol, and any combination thereof;
wherein the paraffin inhibitor solution comprises a paraffin inhibitor that is a solute of the winterized paraffin inhibitor solution; and

contacting a hydrocarbon fluid with the winterized paraffin inhibitor solution.

2. The method of claim 1 , wherein the contacting the hydrocarbon fluid with the winterized paraffin inhibitor solution occurs in a wellbore or a conduit located on a ground surface.

3. The method of claim 1 , wherein the contacting the hydrocarbon fluid with the winterized paraffin inhibitor solution occurs at a temperature below a pour point of the paraffin inhibitor solution.

4. The method of claim 1 , further comprising statically storing the winterized paraffin inhibitor solution without mixing for a time of at least about 1 hour prior to the contacting the hydrocarbon fluid with the winterized paraffin inhibitor solution.

5. The method of claim 1 , wherein the additive is present in the winterized paraffin inhibitor solution in a concentration in a range of about 1% (w/w) to about 40% (w/w).

6. The method of claim 1 , wherein the paraffin inhibitor solution comprises a paraffin inhibitor that is a comb shape polymer.

7. The method of claim 6 , wherein the paraffin inhibitor comprises a linear side chain.

8. The method of claim 6 , wherein the paraffin inhibitor comprises a branched side chain.

9. The method of claim 1 , wherein the winterized paraffin inhibitor solution comprises a pour point of at least 2° F. less than the paraffin inhibitor solution.

10. The method of claim 1 , wherein the paraffin inhibitor comprises a polymer backbone having at least two three-way branch points.

11. The method of claim 1 , wherein the paraffin inhibitor comprises a side chain with a carbon number greater than ten.

12. The method of claim 1 , wherein the paraffin inhibitor comprises a polymer backbone and a sidechain connected to the polymer backbone by a polar group.

13. The method of claim 1 , wherein the paraffin inhibitor is selected from the group consisting of poly(alkylacrylate), poly(alkylmethacrylate), alkylacrylate/alkylmethacrylate copolymers, an ester derivative, an amide derivative, an imide derivative, a maleic anhydride/(meth)acrylate copolymer derivative, and any combinations thereof.

14. The method of claim 1 , wherein the element of preparing a winterized paraffin inhibitor solution by introducing an additive to a paraffin inhibitor solution further comprises adding the additive to the paraffin inhibitor solution prior to injection of the paraffin inhibitor solution into a wellbore or transport equipment.

15. The method of claim 1 , wherein the element of preparing a winterized paraffin inhibitor solution by introducing an additive to a paraffin inhibitor solution further comprises adding the additive to the paraffin inhibitor solution simultaneously with the injection of the paraffin inhibitor solution into a wellbore or transport equipment.

16. The method of claim 1 , wherein the element of preparing a winterized paraffin inhibitor solution by introducing an additive to a paraffin inhibitor solution further comprises adding the additive to a wellbore or transport equipment in which the paraffin inhibitor solution has already been injected.

17. The method of claim 1 , wherein the hydrocarbon fluid is disposed in a wellbore, and wherein the winterized paraffin inhibitor fluid is pumped in the wellbore.

18. The method of claim 1 , wherein the hydrocarbon fluid comprises dissolved wax.

19. The method of claim 1 , wherein the hydrocarbon fluid is disposed in a pipeline, and wherein the winterized paraffin inhibitor fluid is pumped in the pipeline.

20. The method of claim 1 , wherein the additive is present in the winterized paraffin inhibitor solution in a concentration in a range of about 1% (w/w) to about 20%(w/w).

Assignees

• Multi Chem Group Llc

Inventors

• Davis Nathan D
• Lan Qiang
• Jiang Ying Cong
• Gawas Kiran
• Ngo Janet L

Classifications

• C09K8/524 Primary

  organic depositions, e.g. paraffins or asphaltenes · CPC title

• C09K8/536

  characterised by their form or by the form of their components, e.g. encapsulated material · CPC title

• E21B37/06

  using chemical means for preventing or limiting {, e.g. eliminating,} the deposition of paraffins or like substances · CPC title