Method of using biosurfactants as acid corrosion inhibitors in well treatment operations

Patent metadata

Field	Value
Publication number	US-2016237334-A1
Application number	US-201514684182-A
Country	US
Kind code	A1
Filing date	Apr 10, 2015
Priority date	Apr 21, 2014
Publication date	Aug 18, 2016
Grant date	—

Abstract

Corrosive effects arising during well treatment applications are inhibited and/or prevented by introducing into the well composition containing a corrosion inhibitor of a biosurfactant selected from glycolipids (other than sophorolipids and mannosylerythritol lipids), phospholipids; polyol lipids; lipoproteins, lipopeptides, ornithine lipids, carbohydrate-lipids, neutral lipids, aminoacid lipids, exolipids, liposan; siderolipids, protein polyamines diglycosyl diglycerides, fimbriae, saponified triglycerides and fatty acids. The composition may also contain a corrosion inhibitor intensifier.

First claim

What is claimed is:

1 . A method of inhibiting corrosion during a well treatment operation which comprises introducing into a well a composition comprising a corrosive inhibiting effective amount of a biosurfactant selected from the group consisting of glycolipids (other than sophorolipids and mannosylerythritol lipids), phospholipids; polyol lipids; lipoproteins, lipopeptides, ornithine lipids, carbohydrate-lipids, neutral lipids, aminoacid lipids, exolipids, liposan; siderolipids, protein polyamines diglycosyl diglycerides, fimbriae, saponified triglycerides and fatty acids.

2 . The method of claim 1 , wherein the biosurfactant is a glycolipid.

3 . The method of claim 2 , wherein the glycolipid is selected from the group consisting of rhamnolipids, cellobiose lipids, trehalose, lipopolysaccharides, emulsans and alasans.

4 . The method of claim 3 , wherein the glycolipid is a mono-rhamnolipid of formula (I A) or a di-rhamnolipid of formula (I B):

5 . The method of claim 3 , wherein the biosurfactant is a cellobiose lipid of the formula (II):

where R is —H or —OH and n is 2 to 4.

6 . The method of claim 3 , wherein the biosurfactant is a trehalose of the formula (III):

where RCO is mycoloyl.

7 . The method of claim 3 , wherein the biosurfactant is an emulsan of formula (IV):

having an approximate molecular weight of 1,000 kDa.

8 . The method of claim 1 , wherein the biosurfactant is selected from the group consisting of phospholipids; polyol lipids; lipoproteins, lipopeptides, ornithine lipids, carbohydrate-lipids, aminoacid lipids, exolipids, siderolipids, protein polyamines, diglycosyl diglycerides, fimbriae, saponified triglycerides and fatty acids.

9 . The method of claim 8 , wherein the biosurfactant is a protease enzyme.

10 . The method of claim 1 , wherein the composition further comprises a corrosion inhibitor intensifier selected from the group consisting of formic acid, sodium formate, potassium formate, methylformate, ethylformate, sodium iodide, potassium iodide, copper iodide, molecular iodide, metal oxides, and combinations thereof.

11 . The method of claim 10 , wherein the corrosion inhibitor intensifier is potassium iodide.

12 . A method of treating an alloy surface during a well treatment operation comprising the step of contacting the alloy surface with a treatment fluid comprising an aqueous acidic fluid and a corrosion inhibitor selected from the group consisting of glycolipids (other than sophorolipids and mannosylerythritol lipids), phospholipids; polyol lipids; lipoproteins, lipopeptides, ornithine lipids, carbohydrate-lipids, neutral lipids, aminoacid lipids, exolipids, liposan; siderolipids, protein polyamines diglycosyl diglycerides, fimbriae, saponified triglycerides and fatty acids, wherein reduction in corrosion of the alloy surface is greater than when the alloy surface is only contacted with the aqueous acidic fluid.

13 . The method of claim 12 , wherein the glycolipid is selected from the group consisting of rhamnolipids, cellobiose lipids, trehalose, lipopolysaccharides, emulsans and alasans.

14 . The method of claim 12 , wherein the biosurfactant is selected from the group consisting of phospholipids; polyol lipids; lipoproteins, lipopeptides, ornithine lipids, carbohydrate-lipids, aminoacid lipids, exolipids, siderolipids, protein polyamines, diglycosyl diglycerides, fimbriae, saponified triglycerides and fatty acids.

15 . The method of claim 12 , wherein the composition further comprises a corrosion inhibitor intensifier selected from the group consisting of formic acid, sodium formate, potassium formate, methylformate, ethylformate, sodium iodide, potassium iodide, copper iodide, molecular iodide, metal oxides, and combinations thereof.

16 . The method of claim 15 , wherein the corrosion inhibitor intensifier is potassium iodide.

17 . A method of inhibiting corrosion of a steel surface in contact with an acidic fluid during a well treatment operation comprising the steps of:
(a) contacting the acidic fluid with a corrosion inhibitor selected from the group consisting of glycolipids (other than sophorolipids and mannosylerythritol lipids), phospholipids; polyol lipids; lipoproteins, lipopeptides, ornithine lipids, carbohydrate-lipids, neutral lipids, aminoacid lipids, exolipids, liposan; siderolipids, protein polyamines diglycosyl diglycerides, fimbriae, saponified triglycerides and fatty acids; and (b) contacting the steel surface with the acidic fluid and the corrosion inhibitor.

18 . The method of claim 17 , wherein the step of contacting the steel surface with the acidic fluid and the corrosion inhibitor comprises pickling a tubular, cleaning a wellbore, matrix acid stimulation, acid fracturing, acid tunneling, scale treatment, coiled tubing application, or damage removal.

19 . A composition for use in the acid treatment of wells, comprising:
(a) a corrosion inhibitor comprising a biosurfactant selected from the group consisting of glycolipids (other than sophorolipids and mannosylerythritol lipids), phospholipids; polyol lipids; lipoproteins, lipopeptides, ornithine lipids, carbohydrate-lipids, neutral lipids, aminoacid lipids, exolipids, liposan; siderolipids, protein polyamines diglycosyl diglycerides, fimbriae, saponified triglycerides and fatty acids; and (b) corrosion inhibitor intensifier in an acidic solution.

20 . The composition of claim 19 , wherein the biosurfactant is a glycolipid selected from the group consisting of rhamnolipids, cellobiose lipids, trehalose, lipopolysaccharides, emulsans and alasans.

Assignees

• Baker Hughes Inc

Inventors

• Gunawan Stanley
• Vorderbruggen Mark A
• Armstrong Charles David

Classifications

• C09K2208/32

  Anticorrosion additives · CPC title

• C23F1/04

  Chemical milling · CPC title

• C09K8/54 Primary

  Compositions for in situ inhibition of corrosion in boreholes or wells · CPC title

• C09K8/035

  Organic additives · CPC title