Synergistic corrosion inhibitor blends
AssigneeBaker Hughes Oilfield Operations LLC
InventorsCarlos M. Menendez, Sunder Ramachandran, Tracey Jackson
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Abstract
A method for inhibiting corrosion of metal surfaces, such as carbon steel tubing, that are in contact with a fluid, such as brine in an oil and gas production fluid containing acid gases (e.g., CO2 and H2S) is accomplished by introducing a corrosion-inhibiting blend of two components into the fluid, where blend is glycolipids and quaternized amines, glycolipids and phosphate-containing compounds, quaternized amines and imidazoline-like compounds, quaternized amines and phosphate-containing compounds, or combinations of these blends. Each of the two components of the blends are present in an amount effective to synergistically inhibiting the corrosion of the metal surface when used together.
Claims20
A synergistic corrosion inhibitor comprising a blend selected from the group consisting of:
- at least one glycolipid and at least one phosphate-containing compound;
- at least one quaternized amine and at least one imidazoline-like compound;
- at least one quaternized amine and at least one phosphate-containing compound;
- and
- combinations of these blends.
A synergistic corrosion inhibitor comprising:
- a first component selected from the group consisting of glycolipids and quaternized amines;
- and
- a second component selected from the group consisting of phosphate-containing compounds and imidazoline-containing compounds.
An oil or gas production fluid comprising:
- a hydrocarbon selected from the group consisting of oil, natural gas, and combinations thereof;
- brine;
- a corrosive component;
- and
- a synergistic corrosion inhibitor comprising a blend selected from the group consisting of:
- glycolipids and phosphate-containing compounds;
- quaternized amines and imidazoline-like compounds;
- quaternized amines and phosphate-containing compounds;
- and
- combinations of these blends.
Dependencies are inferred from the claim text.