Process for preventing corrosion of a metal in contact with a well fluid
This patent describes a process for preventing the corrosion of a metal composition in contact with a down hole well fluid, which process comprises contacting the surface of the metal composition with an effective amount of, as a corrosion inhibitor, the product resulting from reacting at a temperature of from about 25/sup 0/C to about 250/sup 0/C for a time sufficient to complete the reaction of: (A) at least one aromatic heterocyclic material having one or more rings, at least one nitrogen atom located in the heterocyclic ring and at least one substituent group which has at least one reactive hydrogen atom attached to a carbon atom which is attached to a carbon atom in the aromatic heterocyclic ring selected from the group consisting of heterocyclic compounds represented by the following formulas: wherein each R is independently hydrogen or a hydrocarbyl group at least one of such R groups being one which has at least one reactive hydrogen atom attached to a carbon atom which is attached to a carbon atom in the aromatic heterocyclic ring; (B) at least one aldehyde, ketone or combination thereof; and (C) (1) at least one monoamine having a combined total of at least seven carbon, nitrogen, oxygen or sulfur atoms and at least one reactive amine hydrogen atom; (2) at least one polyamine; or (3) a mixture of (1) and (2); and wherein the components are employed in quantities which provide a mole ratio of (A):(B):(C) of from about 1:0.25:0.25 to about 1:5:5.
- Assignee:
- Dow Chemical Co., Midland, MI
- Patent Number(s):
- US 4740320
- OSTI ID:
- 7229835
- Resource Relation:
- Patent File Date: Filed date 27 Jan 1987
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
36 MATERIALS SCIENCE
CORROSION INHIBITORS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
METALS
CORROSION PROTECTION
NATURAL GAS WELLS
OIL WELLS
ALDEHYDES
AMINES
AROMATICS
CARBON
CORROSIVE EFFECTS
DRILLING FLUIDS
HYDROGEN COMPOUNDS
KETONES
NITROGEN COMPOUNDS
OXYGEN
POLYMERS
RESERVOIR FLUIDS
SULFUR
ELEMENTS
FLUIDS
NONMETALS
ORGANIC COMPOUNDS
SYNTHESIS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing
360105 - Metals & Alloys- Corrosion & Erosion