Encapsulated Production Chemicals

Patent metadata

Field	Value
Publication number	US-2016222278-A1
Application number	US-201514932498-A
Country	US
Kind code	A1
Filing date	Nov 4, 2015
Priority date	Nov 4, 2014
Publication date	Aug 4, 2016
Grant date	—

Abstract

A composition may include a branched polymer to encapsulate a guest molecule to be released under oilfield conditions. The guest molecule may include a production chemical, such as a scale or corrosion inhibitor. The branched polymer may be substituted with fatty acids. The branched polymer may also function as both an ecapsulator as well as a production chemical in certain applications.

First claim

What is claimed is:

1 . A composition comprising:
a branched polymer encapsulating a guest molecule to be released under oilfield conditions.

2 . The composition of claim 1 , wherein the guest molecule comprises a production chemical.

3 . The composition of claim 2 , wherein the production chemical comprises an asphaltene dispersant, a pour point depressant, a biocide, a wax inhibitor, a scale inhibitor, a corrosion inhibitor, a demulsifier, a hydrogen sulfide scavenger, a defoamer, a gas hydrate inhibitor, or a combination thereof.

4 . The composition of claim 1 , wherein the branched polymer also serves as a production chemical.

5 . The composition of claim 4 , wherein the branched polymer serves an asphaltene dispersant, a pour point depressant, a biocide, a wax inhibitor, a scale inhibitor, a corrosion inhibitor, a demulsifier, a hydrogen sulfide scavenger, a defoamer, a gas hydrate inhibitor, or a combination thereof.

6 . The composition of claim 1 , wherein the branched polymer comprises a dendrimer, a polyester polyol, a polyethylenimine, or a combination thereof.

7 . A method comprising:
encapsulating at least one production chemical within a branched polymer.

8 . The method of claim 7 , wherein the production chemical comprises an asphaltene dispersant, a pour point depressant, a biocide, a wax inhibitor, a scale inhibitor, a corrosion inhibitor, a demulsifier, a hydrogen sulfide scavenger, a defoamer, a gas hydrate inhibitor, or a combination thereof.

9 . The method of claim 7 , wherein the branched polymer comprises a dendrimer, a polyester polyol, a polyethylenimine, or a combination thereof.

10 . The method of claim 7 , wherein the branched polymer also serves as a production chemical.

11 . The method of claim 10 , wherein the production chemical comprises an asphaltene dispersant, a pour point depressant, a biocide, a wax inhibitor, a scale inhibitor, a corrosion inhibitor, a demulsifier, a hydrogen sulfide scavenger, a defoamer, a gas hydrate inhibitor, or a combination thereof.

12 . The method of claim 10 further comprising adding said encapsulated production chemical into a hydrocarbon fluid.

13 . The method of claim 12 wherein the encapsulated production chemical is present in the hydrocarbon fluid at a concentration between 10-1000 ppm.

14 . The method of claim 10 wherein the hydrocarbon fluid is a hydrocarbon fluid produced during extraction of hydrocarbons from a well, crude oil, a crude oil condensate, a middle distillate, a fuel oil, diesel, or a combination thereof.

15 . The method of claim 10 wherein the encapsulated production chemical is added to the hydrocarbon fluid prior to the hydrocarbon fluid being extracted from a well.

16 . The method of claim 10 wherein the encapsulated production chemical is added to the hydrocarbon fluid prior to transporting the hydrocarbon fluid in a pipeline.

17 . A method comprising:
treating a hydrocarbon fluid with a production chemical encapsulated within a branched polymer.

18 . The method of claim 17 wherein the production chemical comprises an asphaltene dispersant, a pour point depressant, a biocide, a wax inhibitor, a scale inhibitor, a corrosion inhibitor, a demulsifier, a hydrogen sulfide scavenger, a defoamer, a gas hydrate inhibitor, or a combination thereof.

19 . The method of claim 17 wherein the hydrocarbon fluid is a hydrocarbon fluid produced during extraction of hydrocarbons from a well, crude oil, a crude oil condensate, a middle distillate, a fuel oil, diesel, or a combination thereof.

20 . The method of claim 17 wherein treatment of the hydrocarbon fluid occurs prior to the hydrocarbon fluid being extracted from a well.

Assignees

• Schlumberger Norge As
• M-I Drilling Fluids Uk Ltd
• M-I L L C

Inventors

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

Classifications

• C09K2208/32

  Anticorrosion additives · CPC title

• C09K2208/20

  Hydrogen sulfide elimination · CPC title

• B01D17/00

  Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion (devices for separating or removing fatty or oily substances or similar floating material from water, waste water, or sewage C02F1/40; cleaning or keeping clear the surface of open water from oil or like materials E02B15/04; arrangements for separating lubricants from refrigerants F25B43/02) · CPC title

• C08G83/006

  After treatment of hyperbranched macromolecules · CPC title

• C09K8/536 Primary

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