Decreasing corrosion on metal surfaces with apatite forming components
AssigneeBaker Hughes, A Ge Company, LLC
InventorsZhengwei Liu, Tracey Jackson, Richard Martin
Life of this patent
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Abstract
Corrosion to a metal surface in contact with corrosion forming components within an aqueous-based fluid system may be decreased, prevented, and/or inhibited by contacting the metal surface(s) with apatite forming components and forming at least one apatite species on the surface with the apatite forming components. The apatite forming components may be or include phosphates, organophosphates and combinations thereof. In a non-limiting embodiment, the apatite forming components may further include fluorides, chlorides, calcium, and combinations thereof.
Claims14
A method for decreasing corrosion to a metal surface in an oil production system, wherein the method comprises:
- circulating an aqueous-based fluid comprising apatite forming components into an oil production system;
- contacting at least one metal surface within the oil production system with the apatite forming components;
- and
- forming at least one apatite species selected from the group consisting of fluoroapatite, chloroapatite, and combinations thereof on the at least one metal surface with the apatite forming components;
- wherein less corrosion occurs to at least one metal surface as compared to an otherwise identical method without the contact of at least one metal surface with the apatite forming components.
A system for decreasing corrosion to a metal surface comprising:
- at least one metal surface within an oil production system;
- an aqueous-based fluid;
- at least one apatite species selected from the group consisting of fluoroapatite, chloroapatite, and combinations thereof formed upon the metal surface;
- and
- corrosion forming components;
- wherein less corrosion occurs to the at least one metal surface in the presence of the at least one apatite species as compared to an otherwise identical at least one metal surface absent the at least one apatite species.
A method for decreasing corrosion to a metal surface in an oil production system, wherein the method comprises:
- shutting down an oil production system;
- applying a hydrocarbon-based solution comprising apatite forming components to the oil production system in a batch treatment;
- contacting at least one metal surface within the oil production system system with the hydrocarbon-based solution comprising apatite forming components;
- bringing the oil production system back online,
- wherein once the oil production system is brought back online, less corrosion occurs to the at least one metal surface in the presence of the apatite forming components as compared to an otherwise identical at least one metal surface absent the apatite forming components.
Dependencies are inferred from the claim text.