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US 10,947,626 B2Granted
Fluoride corrosion inhibition of metal surfaces
AssigneeHalliburton Energy Services, Inc.
InventorsTiffany Anne Pinder, Enrique Antonio Reyes
Life of this patent
Estimating the term…
Abstract
Certain metal surfaces are often unable to be effectively contacted with fluids containing hydrofluoric acid due to significant corrosion issues. Titanium and titanium alloy surfaces represent but one example. Corrosion inhibitor compositions comprising boron-hydroxyalkyl(amine) compound(s) can be used to suppress such metal corrosion, including that taking place on titanium and titanium alloy surfaces, particularly those in a wellbore or in fluid communication with a wellbore.
Claims18
A method comprising:
- providing a treatment fluid comprising:
- a fluoride source and a corrosion inhibitor composition comprising an aqueous-based fluid, a boron-hydroxyalkyl(amine) compound, and a methan hydrate inhibitor;
- introducing the treatment fluid into a downhole location including a metal surface comprising titanium or a titanium alloy, wherein the downhole location is selected from the group consisting of a location in a wellbore penetrating a subterranean formation, a location in fluid communication with the wellbore, and any combination thereof;
- and
- suppressing corrosion of the metal surface by the fluoride source with the corrosion inhibitor composition.
2 more elements
A method comprising:
- introducing a treatment fluid into a downhole location through an umbilical, the treatment fluid comprising:
- a fluoride source;
- and
- a corrosion inhibitor composition comprising an aqueous-based fluid, a boron-hydroxyalkyl(amine) compound, and a methane hydrate inhibitor,
- wherein the into a downhole location is a subsea drilling and production system which includes a metal surface comprising titanium or a titanium alloy;
- and
- suppressing corrosion of the metal surface by the fluoride source with the corrosion inhibitor composition.
4 more elements
A method comprising:
- providing a treatment fluid comprising:
- a fluoride source and a corrosion inhibitor composition comprising an aqueous-based fluid and a boron-hydroxyalkyl(amine) compound, wherein the boron-hydroxyalkyl(amine) compound is a reaction product of an amine and a boric acid triester, the boric acid triester selected from the group consisting of 2-ethoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, 2-isopropoxy-4,4,6-trimethyl-1,3,2-dioxaborinane, 2-methoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, tributyl borate, tridecyl borate, triethyl borate, trihexyl borate, triisopropyl borate, 2,4,6-trimethoxyboroxin, trimethyl borate, trioctadecyl borate, tri-n-octyl borate, triphenyl borate, tripropyl borate, tris(4-chlorophenyl) borate, tris(2-cyanoethyl) borate, tris(hexafluoroisopropyl) borate, tris(2,2,2-trifluoroethyl) borate, tris(trimethylsilyl) borate, tritetradecyl borate, tri-o-tolyl borate, and any combination thereof;
- introducing the treatment fluid into a downhole location including a metal surface comprising titanium or a titanium alloy, wherein the downhole location is selected from the group consisting of a location in a wellbore penetrating a subterranean formation, a location in fluid communication with the wellbore, and any combination thereof;
- and
- suppressing corrosion of the metal surface by the fluoride source with the corrosion inhibitor composition.
2 more elements
A method comprising:
- introducing a treatment fluid into a downhole location through an umbilical, the treatment fluid comprising:
- a fluoride source;
- and
- a corrosion inhibitor composition comprising an aqueous-based fluid and a boron-hydroxyalkyl(amine) compound wherein the boron-hydroxyalkyl(amine) compound is a reaction product of an amine and a boric acid triester, the boric acid triester selected from the group consisting of 2-ethoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, 2-isopropoxy-4,4,6-trimethyl-1,3,2-dioxaborinane, 2-methoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, tributyl borate, tridecyl borate, triethyl borate, trihexyl borate, triisopropyl borate, 2,4,6-trimethoxyboroxin, trimethyl borate, trioctadecyl borate, tri-n-octyl borate, triphenyl borate, tripropyl borate, tris(4-chlorophenyl) borate, tris(2-cyanoethyl) borate, tris(hexafluoroisopropyl) borate, tris(2,2,2-trifluoroethyl) borate, tris(trimethylsilyl) borate, tritetradecyl borate, tri-o-tolyl borate, and any combination thereof,
- wherein the into a downhole location is a subsea drilling and production system which includes a metal surface comprising titanium or a titanium alloy;
- and
- suppressing corrosion of the metal surface by the fluoride source with the corrosion inhibitor composition.
4 more elements
Dependencies are inferred from the claim text.