Synergistic paraffin inhibitors with high and low crystallization onset temperatures

Patent metadata

Field	Value
Publication number	US-2025129299-A1
Application number	US-202318382981-A
Country	US
Kind code	A1
Filing date	Oct 23, 2023
Priority date	Oct 23, 2023
Publication date	Apr 24, 2025
Grant date	—

Abstract

In one aspect, a synergistic paraffin inhibitor includes a high-temperature intermediate and a low-temperature intermediate. The high-temperature intermediate has a high crystallization onset temperature, while the low-temperature intermediate has a low crystallization onset temperature that is within a range of about 6° C. and about 30° C. lower than the high crystallization onset temperature. In another aspect, the synergistic paraffin inhibitor is prepared by obtaining a high-temperature intermediate and a low-temperature intermediate. The high-temperature intermediate and the low-temperature intermediate are mixed to form the synergistic paraffin inhibitor, which may be introduced to a crude oil.

First claim

It is claimed:

1 . A synergistic paraffin inhibitor comprising:
a high-temperature intermediate with a high crystallization onset temperature, and a low-temperature intermediate with a low crystallization onset temperature, wherein the low crystallization onset temperature is within a range of between about 6° C. and about 30° C. lower than the high crystallization onset temperature.

2 . The synergistic paraffin inhibitor of claim 1 , wherein the high crystallization onset temperature is between about 5° C. and about 23° C.

3 . The synergistic paraffin inhibitor of claim 2 , wherein the high crystallization onset temperature is between about 5° C. and about 18° C.

4 . The synergistic paraffin inhibitor of claim 1 , wherein the high-temperature intermediate is selected from the group consisting of polyacrylates, polyacrylate and polymethacrylate copolymers, olefin maleic esters, olefin maleic imides and phenolic resins.

5 . The synergistic paraffin inhibitor of claim 4 , wherein the high-temperature intermediate comprises at least one polyacrylate having an alkyl chain of a length between C17 and C22.

6 . The synergistic paraffin inhibitor of claim 1 , wherein the low-temperature intermediate is selected from the group consisting of polyacrylates, polymethacrylates, polyacrylate and polymethacrylate copolymers, olefin maleic esters, olefin maleic imides and phenolic resins.

7 . The synergistic paraffin inhibitor of claim 6 , wherein the low-temperature intermediate comprises at least one polyacrylate having an alkyl chain of a length between C12 to C16.

8 . The synergistic paraffin inhibitor of claim 1 , wherein the high-temperature intermediate comprises a copolymer of stearyl acrylate and hexadecyl acrylate, and wherein the low-temperature intermediate comprises a copolymer of behenyl methacrylate and stearyl methacrylate.

9 . The synergistic paraffin inhibitor of claim 1 , wherein the high-temperature intermediate comprises a polymer of stearyl acrylate, and wherein the low-temperature intermediate comprises a polymer of stearyl methacrylate.

10 . The synergistic paraffin inhibitor of claim 1 , wherein the high-temperature intermediate comprises a polymer of behenyl acrylate and a copolymer of stearyl acrylate and behenyl acrylate, and wherein the low-temperature intermediate comprises a copolymer of behenyl methacrylate and stearyl methacrylate.

11 . The synergistic paraffin inhibitor of claim 1 , wherein the high-temperature intermediate comprises a copolymer of stearyl acrylate and behenyl acrylate, and wherein the low-temperature intermediate comprises a polymer of behenyl methacrylate.

12 . The synergistic paraffin inhibitor of claim 1 , wherein the high-temperature intermediate comprises a copolymer of stearyl acrylate and behenyl acrylate, and wherein the low-temperature intermediate comprises an olefin maleic imide polymer.

13 . The synergistic paraffin inhibitor of claim 1 , wherein the high-temperature intermediate comprises a polymer of stearyl acrylate, and wherein the low-temperature intermediate comprises a phenolic resin polymer comprising an alkyl chain with a length between C20 and C28.

14 . The synergistic paraffin inhibitor of claim 1 , wherein the high-temperature intermediate and the low-temperature intermediate are present in a range of between 1:20 and 20:1 (high-temperature intermediate:low-temperature intermediate).

15 . A method of preparing a synergistic paraffin inhibitor, the method comprising the steps of:
obtaining a high-temperature intermediate with a high crystallization onset temperature; obtaining a low-temperature intermediate with a low crystallization onset temperature, wherein the low crystallization onset temperature is between about 6° C. and about 30° C. lower than the high crystallization onset temperature; and mixing the high-temperature intermediate and the low-temperature intermediate.

16 . The method of claim 15 , further comprising the step of identifying the high-temperature intermediate as suitable to treat a specific oil selected from synthetic oils, crude oils, and heavy crude oils.

17 . The method of claim 16 , wherein the step of identifying the high-temperature intermediate as suitable to treat the specific oil further comprises the step of evaluating the paraffin and/or wax composition of the specific oil.

18 . A method of treating a crude oil with a synergistic paraffin inhibitor, the method comprising the steps of:
preparing the synergistic paraffin inhibitor, further comprising the steps of:
obtaining a high-temperature intermediate with a high crystallization onset temperature;
obtaining a low-temperature intermediate with a low crystallization onset temperature, wherein the low crystallization onset temperature is within a range of between about 6° C. and about 30° C. lower than the high crystallization onset temperature; and
mixing the high-temperature intermediate and the low-temperature intermediate; and
introducing the synergistic paraffin inhibitor to the crude oil.

19 . The method of claim 18 , wherein the high-temperature intermediate is selected from the group consisting of polyacrylates, polyacrylate and polymethacrylate copolymers, olefin maleic esters, olefin maleic imides and phenolic resins, and the low-temperature intermediate is selected from the group consisting of polyacrylates, polymethacrylates, polyacrylate and polymethacrylate copolymers, olefin maleic esters, olefin maleic imides and phenolic resins.

20 . The method of claim 18 , wherein the high-temperature intermediate comprises a polymer of stearyl acrylate, and wherein the low-temperature intermediate comprises a phenolic resin polymer comprising an alkyl chain with a length between C20 and C28.

Assignees

• Baker Hughes Oilfield Operations Llc

Inventors

• Jakubowski Wojciech
• Dolog Rostyslav
• Suresh Radhika

Classifications

• C10G29/20

  Organic compounds not containing metal atoms · CPC title

• C10G29/22 Primary

  containing oxygen as the only hetero atom · CPC title