Encapsulated production chemicals

Patent metadata

Field	Value
Publication number	US-11292952-B2
Application number	US-201716099162-A
Country	US
Kind code	B2
Filing date	May 3, 2017
Priority date	May 4, 2016
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A method of performing an oilfield treatment that includes delivering to an oilfield fluid a host-guest complex, wherein the host-guest complex is formed from a solution of host molecule mixed with a guest molecule having opposing solubility from the host molecule; wherein the host molecule is present in the solution in an amount of at least 2×10−6 M.

First claim

What is claimed:

1. A method of performing an oilfield treatment, comprising:
delivering to an oilfield fluid an oil-field treatment composition, comprising:
a host-guest complex, wherein the host-guest complex is formed from a solution of an aqueous base fluid and host molecule encapsulating a guest molecule having opposing solubility from the host molecule;
wherein the host molecule is present in the solution in an amount of at least 2×10 6 M; and
wherein the guest molecule comprises alkyl benzene sulfonic acid and is not independently soluble in the aqueous base fluid.

2. The method of claim 1 , wherein the guest molecule is within a second solution that is not miscible with the first solution.

3. The method of claim 1 , wherein the guest molecule is a solid.

4. The method of claim 1 , wherein the host molecule is a dendrimer-comprising polyester polyols.

5. The method of claim 1 , wherein the host molecule is a dendrimer having a degree of branching of ranging from about 0.5 to 1.

6. The method of claim 1 , wherein the host molecule is a dendrimer having at least 6 functional end groups.

7. The method of claim 1 , wherein the dendrimer is functionalized with oil-soluble functional groups.

8. The method of claim 7 , wherein the oil-soluble functional groups are selected from fatty acids, polyisobutylene succinimides, polyisobutylene succinic anhydride, alkyl epoxides, 2,2-bis(hydroxymethyl) propionic acid, propylene oxide, and/or alkyl ether carboxylic acids.

9. The method of claim 1 , wherein the dendrimer is functionalized with water-soluble functional groups.

10. The method of claim 9 , wherein the water-soluble functional groups are selected from succinic anhydride, phosphonic acid, caprolactone, caprolactam, carboxylic acids, phosphate groups, alcohol groups, amide groups, amine groups, quaternized amine groups, imidazolines, ethylene oxide groups, polyethylene glycol, sulfonic acid groups, and/or polylactic acid.

11. An oil-field treatment composition, comprising:
an aqueous base fluid; and a host molecule encapsulating a guest molecule, wherein the guest molecule comprises alkyl benzene sulfonic acid and is not independently soluble in the aqueous base fluid.

12. The composition of claim 11 , wherein the host molecule is a dendrimer comprising polyester polyols.

13. The composition of claim 11 , wherein the host molecule is functionalized with water soluble functional groups selected from succinic anhydride, phosphonic acid, caprolactone, caprolactam, carboxylic acids, phosphate groups, alcohol groups, amide groups, amine groups, quaternized amine groups, imidazolines, ethylene oxide groups, propylene oxide groups, polyethylene glycol, sulfonic acid groups, and/or polylactic acid.

14. The composition of claim 11 , wherein the guest molecule comprises an alkyl benzene sulfonic acid.

15. A method of treating a fluid, comprising:
adding an oil-field treatment composition to a hydrocarbon fluid; wherein the oil-field treatment composition, comprises:
an aqueous base fluid; and
a host molecule encapsulating a guest molecule, wherein the guest molecule is not independently soluble in the base fluid and comprises an alkyl benzene sulfonic acid.

Assignees

• Mi Llc
• M I Drilling Fluids Uk Ltd
• Schlumberger Norge As
• Cameron Int Corp

Inventors

• Cole Rachael
• Feasey Neil
• Khandekar Chandrashekhar Yeshwant
• Nordvik Tore
• Grainger Neil

Classifications

• C09K8/035 Primary

  Organic additives · CPC title

• C09K8/528

  inorganic depositions, e.g. sulfates or carbonates · CPC title

• C09K2208/20

  Hydrogen sulfide elimination · CPC title

• C09K2208/32

  Anticorrosion additives · CPC title

• C09K8/524

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