Synergistic corrosion inhibitor blends
AssigneeBaker Hughes Oilfield Operations LLC
InventorsCarlos M. Menendez, Sunder Ramachandran, Tracey Jackson
Life of this patent
Estimating the term…
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.
Claims6
An oil or gas production fluid comprising:
- a hydrocarbon selected from the group consisting of oil, natural gas, and combinations thereof;
- brine;
- at least one acid gas in equilibrium with the hydrocarbon and the brine where the acid gas is selected from the group consisting of carbon dioxide and hydrogen sulfide;
- and
- a synergistic corrosion-inhibiting binary blend selected from the group consisting of:
- at least one glycolipid and at least one quaternized amine, wherein the at least one quaternized amine comprises a polyalkylene glycol diester diquat.
Synergistic corrosion-inhibiting binary blends comprising:
- a blend, wherein the blend is selected from the group consisting of:
- at least one glycolipid and at least one quaternized amine, wherein the at least one quaternized amine comprises a polyalkylene glycol diester diquat.
Dependencies are inferred from the claim text.