In-situ neutralization media for downhole corrosion protection

Patent metadata

Field	Value
Publication number	US-10329883-B2
Application number	US-201715712981-A
Country	US
Kind code	B2
Filing date	Sep 22, 2017
Priority date	Sep 22, 2017
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

Inhibiting or preventing corrosion of metallic components downhole may be accomplished by introducing neutralization media into a wellbore in the proximity of downhole metallic components, where the neutralization media comprises magnesium and where the method further includes subsequently contacting the neutralization media with a potentially corrosive environment comprising at least 5 volume % water, where the water has a pH of less than 11. This contacting activates the neutralization media with the water thereby releasing magnesium ions, and the magnesium ions react with hydroxyl ions of the water to give magnesium hydroxide in an amount effective to raise the pH of the water present to be between about 8 and 12 thereby inhibiting or preventing corrosion of metallic components downhole.

First claim

What is claimed is:

1. A method for inhibiting or preventing corrosion of metallic components downhole, the method comprising:
introducing neutralization media into a wellbore in proximity of the downhole metallic components, the neutralization media comprising magnesium and where the neutralization media is selected from the group consisting of controlled electrolytic metallic (CEM) nanostructured material, media produced by additive manufacturing, and combinations thereof, where the additive manufacturing is selected from the group consisting of three-dimensional (3D) printing, rapid prototyping, direct digital manufacturing, layered manufacturing, stereolithography, multi-jet modeling, fused deposition modeling and selective laser sintering;
sensing a parameter change in a corrosive fluid by a sensor, which sensor initiates contacting the neutralization media with the corrosive fluid, where the corrosive fluid comprises water, where the water has a pH of less than about 11; where the parameter change is selected from the group consisting of detecting the pH of the corrosive fluid falling, detecting a presence of H 2 S, detecting a presence of CO 2 , detecting a temperature increase above a pre-set threshold, detecting an oxygen concentration increase, detecting a change in the concentration or presence of a predetermined species above a pre-set threshold, detecting an increase in electrical conductivity above a pre-set threshold, and combinations of these;
activating the neutralization media with the corrosive fluid and releasing magnesium ions; and
reacting the magnesium ions with hydroxyl ions of the water to give magnesium hydroxide in an amount effective to raise the pH of the water present to be between about 8 and 12 thereby inhibiting or preventing corrosion of the metallic components downhole.

2. The method of claim 1 where the neutralization media is contained on or within a downhole tool in the wellbore.

3. The method of claim 1 where the activating the neutralization media comprises dissolving the neutralization media in the water present.

4. A method for inhibiting or preventing corrosion of metallic components downhole, the method comprising:
introducing neutralization media into a wellbore in proximity of the downhole metallic components, the neutralization media comprising magnesium, where the neutralization media is selected from the group consisting of controlled electrolytic metallic (CEM) nanostructured material, media produced by additive manufacturing, and combinations thereof, where the additive manufacturing is selected from the group consisting of three-dimensional (3D) printing, rapid prototyping, direct digital manufacturing, layered manufacturing, stereolithography, multi-jet modeling, fused deposition modeling and selective laser sintering;
sensing a change in a corrosive fluid in the wellbore by a sensor, which sensor initiates contacting the neutralization media with the corrosive fluid, where the corrosive fluid comprises water, where the water has a pH of less than 11; where the sensor initiates the contacting upon sensing a parameter change selected from the group consisting of detecting the pH of the corrosive fluid falling, detecting a presence of H 2 S, detecting a presence of CO 2 , detecting a temperature increase above a pre-set threshold, detecting an oxygen concentration increase, detecting a change in the concentration or presence of a predetermined species above a pre-set threshold, detecting an increase in electrical conductivity above a pre-set threshold, and combinations of these;
contacting the neutralization media with the corrosive fluid;
activating the neutralization media with the water and releasing magnesium ions; and
reacting the magnesium ions with hydroxyl ions of the water to give magnesium hydroxide in an amount effective to raise the pH of the water present to be between about 8 and 12 thereby inhibiting or preventing corrosion of the metallic components downhole.

5. The method of claim 4 where the neutralization media is contained on or within a downhole tool in the wellbore.

6. The method of claim 4 where the activating the neutralization media comprises dissolving the neutralization media in the water present.

Assignees

• Baker Hughes A Ge Co Llc

Inventors

• Sarmiento Klapper Helmuth
• Xu Zhiyue

Classifications

• E21B41/02 Primary

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

• C09K8/54

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

• C09K8/032

  Inorganic additives · CPC title

• C01F5/14 Primary

  Magnesium hydroxide · CPC title

• E21B34/08

  responsive to flow or pressure of the fluid obtained (E21B34/10 takes precedence) · CPC title