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7216710 |
Thiol/aldehyde corrosion inhibitors
Methods of inhibiting corrosion comprising providing a corrosive environment; adding a corrosion inhibitor comprising a reaction product of a thiol compound and an aldehyde compound. Methods of...
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6706668 |
Electron transfer agents in well acidizing compositions and methods
An acidizing composition and a method of acidizing a hydrocarbon bearing subterranean formation in the presence of ferric ions are provided. The acidizing composition includes a strong mineral acid...
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6653260 |
Electron transfer system for well acidizing compositions and methods
An acidizing composition and a method of acidizing a hydrocarbon bearing subterranean formation in the presence of ferric ions are provided. The acidizing composition includes a mineral acid...
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6534448 |
Composition and method for acidizing wells and equipment without damaging precipitation
An acidizing composition and a method of acidizing a hydrocarbon bearing subterranean formation in the presence of ferric ions are provided. The acidizing composition includes an aqueous mineral...
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6117364 |
Acid corrosion inhibitor
An acid corrosion inhibitor composition is provided for petroleum wells and water wells subjected to stimulation with acid solutions. The inhibitor combines cinnamaldehyde and an organo-sulfur...
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6060435 |
Solubilized and regenerating iron reducing additive
A solubilized iron reducing additive for acid solutions and method for preparing such a solubilized iron reducing additive. The additive includes an iron reducing agent reactable with ferric ions...
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5779938 |
Compositions and methods for inhibiting corrosion
The invention is an effective, easy to produce, and economical corrosion inhibitor which can be used in a variety of environments. The corrosion inhibitor of the present invention is the salt of...
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5674817 |
Controlling iron in aqueous well fracturing fluids
Methods and compositions for controlling iron in aqueous well fracturing fluids are disclosed. In accordance with the methods, ferric iron contained in a fracturing fluid is prevented from...
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5669447 |
Methods for breaking viscosified fluids
The present invention relates to a method of breaking an aqueous based viscosified fluid containing a breaker comprising an alkali metal chlorite or hypochlorite through use of a breaker activator...
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5585334 |
Process for dissolving sulfur
A process which can be used to dissolve sulfur deposits or sulfur plugs in gas wells, oil wells, vessels, or conduits for transporting a fluid containing sulfur is provided. The process comprises...
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5547926 |
New compositions for iron control in acid treatments for oil wells
The invention relates to iron control in an acid medium for forestalling the formation of precipitates known as "sludges" (asphaltic products) in contact with certain crude oils. Use is made of...
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5104557 |
Mercaptan composition for dissolving sulfur and process for its use
A composition is disclosed for dissolving sulfur and preventing or removing sulfur plugs from sour gas and oil wells or other conduits through which sulfur bearing liquids flow which comprises a...
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5051197 |
Scale removal treatment
An aqueous composition comprises an aminopolycarboxylic acid and a water-soluble organosilicon compound. The composition is useful for removing scale from well equipment and/or openings in a...
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5028343 |
Stabilized sulfur dissolving compositions
A composition of matter is disclosed which includes a major proportion of an organic di- or polysulfide, a catalytic amount of an amine/mercaptan mixture, and a stabilizing component in an amount...
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4941982 |
Calcium-free clear high density fluids
Clear high density fluids for use as completion, packing and perforation media in oil and gas well formations having high carbonate and/or high sulfate ion concentration are formulated from aqueous...
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4784778 |
Corrosion inhibiting composition for zinc halide-based clear, high density fluids
Thio group corrosion inhibitors and aldose group antioxidants when combined provide a synergistic corrosion inhibition system for clear, high density oil and gas completion and workover fluids.
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4784779 |
Corrosion inhibitors for clear, calcium-free high density fluids
The present invention relates to corrosion inhibitors which can be used with calcium-free drilling, completion and workover fluids in carbonate or sulfate containing wells. More particularly, the...
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4725373 |
Novel compositions prepared from alkyl substituted nitrogen-containing aromatic heterocyclic compounds and dicarboxylic acid monoanhydrides
New compositions of matter are disclosed which are the products resulting from reacting an alkyl substituted aromatic heterocyclic nitrogen-containing compound such as 2,4,6-trimethylpyridine or...
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4411816 |
Native petroleum surfactants
Isolation of native petroleum surfactants for lowering interfacial tensions in aqeuous-alkaline systems. Petroleum of the type having reduced interfacial tension with water at high pH is subjected...
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4277352 |
Demulsification of emulsions produced from surfactant recovery operations and recovery of surfactants therefrom
Treatment of emulsions of oil and water produced from surfactant recovery operations whereby the produced emulsions containing surfactants are demulsified and the surfactants are recovered in the...
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4252655 |
Scavenging hydrogen sulfide in an oil well
Fluids for drilling, completing or servicing wells are treated for the removal or inactivation of hydrogen sulfide contamination by the addition of at least one organic zinc chelate.
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4110228 |
Salinity tolerant surfactant oil recovery process
Primary anionic surfactants such as organic sulfonates, specifically petroleum sulfonates as well as synthetic alkyl or alkylaryl sulfonates are effective for recovering oil from subterranean,...
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4110229 |
Salinity tolerant surfactant oil recovery process
Disclosed is an aqueous, saline surfactant-containing fluid and an oil recovery process using the fluid for recovering oil from formations containing high salinity and/or high hardness water, the...
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3756257 |
ACRYLIC COMPOSITION FOR WATER TREATMENT AND PROCESS FOR MAKING SAME
This invention relates to an acrylic composition; a process for obtaining the acrylic composition; to the use of such composition to remove and/or inhibit scale formation in water treatment...
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3197403 |
Acidizing corrosion inhibitor
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3017355 |
Corrosion inhibitor composition
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2993864 |
Ethynylcyclohexyl compounds as corrosion inhibitors
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2805257 |
1-ethynyl-cyclohexylthiols
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