Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7786054 | Biocide for well stimulation and treatment fluids A well stimulation and or treatment fluid that includes water, other additives, and a biocide consisting of 3,5-dimethyl-1,3,5-thiadiazinane-2-thione in an amount effective to inhibit bacterial growth and minimize antagonistic reactions between the biocide and other... | 08/31/2010 |
| 7332460 | Alkylxylene sulfonates for enhanced oil recovery processes The present invention is directed to alkylxylene sulfonate for enhanced oil recovery processes. The alkylxylene moiety in the alkylxylene sulfonate contains a high percentage of the 4-alkyl-1,2-dimethyl benzene isomer and a high percentage of alkyl group attachment ... | 02/19/2008 |
| 7160843 | Oil-based demulsifying agent and its use in the treatment of drains bored in oil-based mud An oil-based demulsifying formulation which can be used in the treatment of drains bored in oil-based mud, non ecotoxic and optimally compatible with formation fluids, comprises at least one wetting agent chosen from anionic surfacetants and at least one demulsifier... | 01/09/2007 |
| 6923264 | Methods of fracturing subterranean zones, fracturing fluids and breaker activators therefor A method of fracturing subterranean zones at temperature below about 200° F. wherein the fracturing fluid comprises water, a viscosity increasing gelling agent, a particulate proppant material, a delayed viscosity breaker for causing the fracturing fluid to revert ... | 08/02/2005 |
| 6866797 | Corrosion inhibitors and methods of use A class of quaternary ammonium compounds are found to be effective as corrosion inhibitors. These quaternary ammonium compounds may be used alone or in combination with additional components. For example, phosphate esters can be used with the quaternary ammonium com... | 03/15/2005 |
| 6774090 | Compositions and methods for controlling downhole sulfide deposits Compositions and methods for treating systems, especially oil and/or gas wells, characterized by metal sulfide deposits are provided. Compositions according to the invention generally comprise a thioacid, an amine salt, and a diphosphonic acid. Methods according to ... | 08/10/2004 |
| 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 acid solution, an electron donor agent and an electron trans... | 03/18/2003 |
| 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 compound. The inhibitor provides a reduced rate of corrosion a... | 09/12/2000 |
| 5916484 | Metal corrosion inhibited organic acid compositions By the present invention, improved metal corrosion inhibited aqueous organic acid compositions and methods are provided. The compositions are basically comprised of water, an organic acid, a corrosion inhibitor comprising at least one rosin amine derivati... | 06/29/1999 |
| 5821202 | Hydrocarbon stream antifoulant method using bridged alkyl phenates Formation of fouling deposits in a hydrocarbon process stream during processing at elevated temperatures is reduced by including in the hydrocarbon process stream an antifouling amount of a salt of a hydrocarbyl-substituted linked hydroxyaromatic compound... | 10/13/1998 |
| 5658860 | Environmentally safe lubricated well fluid method of making a well fluid and method of drilling A well fluid emusion having a water phase and an oil phase of a sulfurized alcohol and a naturally occuring fat, oil or derivatives thereof. Also disclosed is a method of lubricating drilling equipment used in conjunction with the drilling, completion or ... | 08/19/1997 |
| 5614476 | Method for reducing the crystallization temperature of a carbon disulfide precursor-containing solution and resulting compositions Compounds selected from the group consisting of ammonia, ammonium-containing compounds, urea, urea homologues and analogues, and mixtures thereof surprisingly lower the crystallization temperature of aqueous, carbon disulfide precursor (e.g., thiocarbonat... | 03/25/1997 |
| 5593955 | Method for reducing the pour point of an oil and compositions for use therein Compounds selected from the group consisting of urea, urea homologues and analogues, and mixtures thereof are employed to synergistically increase the dewaxing efficacy of aqueous, carbon disulfide precursor (e.g., thiocarbonate)-containing solutions.... | 01/14/1997 |
| 5073270 | Use of reducing agents to control scale deposition from high temperature brine The deposition of metal-containing scale, such as iron silicate scale, from a hot aqueous geothermal brine, or the like, is controlled by blending into the brine sufficient reducing agent effective for reducing trivalent iron and manganese cations in a hi... | 12/17/1991 |
| 5053149 | Method for dewaxing oil and gas pipelines or wells A process for dissolving wax, paraffin and/or sulfur deposits in an oil or gas pipeline or well comprises providing at the site of the deposit an acid and a compound which liberates carbon disulfide upon contact with the acid, whereby the deposit is disso... | 10/01/1991 |
| 4819729 | Method for recovering petroleum using oligomeric surfactants A method for recovering petroleum from a subterranean, petroleum-containing formation. It includes injecting into said formation a formulation comprising an oligomeric surfactant wherein said oligomeric surfactant has the following formula: wherein R is a... | 04/11/1989 |
| 4790958 | Chemical method of ferric ion removal from acid solutions Onium species of nitrogen, phosphorus or sulfur are useful to precipitate ferric ion, existing as tetrahaloferrate anion, from strong haloacid solutions. The precipitants are useful in the field of well acidizing, because tetrahaloferrate anion attacks po... | 12/13/1988 |
| 4744948 | Thiol ester corrosion inhibition system A series of water-dispersible corrosion inhibiting solutions and a method of using these solutions are disclosed which contain a thiol ester represented by the formula ##STR1## wherein R is an alkyl group having about 8 to about 22 carbon atoms, or a... | 05/17/1988 |
| 4738789 | Surfactant solvent composition A micellar acidic surfactant solvent composition of enhanced oil/organic solvency and method of preparing and using same. The oil solvency of a propoxylated/ethoxylated surfactant and alcohol micellar acidizing system is enhanced by controlling or selecti... | 04/19/1988 |
| 4670163 | Inhibiting corrosion Halohydroxyalkylthio-substituted an dihydroxyalkylthio-substituted polycarboxylic acids and alkali metal salts thereof are effective corrosion inhibitors for various metal surfaces. In one embodiment, mineral acid compositions such as aqueous hydrochloric... | 06/02/1987 |
| 4662444 | Process for reducing polymer plugging during polymer injection into oil reservoir Disclosed is a method of treating the wellbore area of an injection well to minimize polymer plugging around the wellbore during polymer injection. The treatment can be achieved by the injection of a dilute organic cation solution to the wellbore prior to... | 05/05/1987 |
| 4637833 | Inhibiting corrosion: benzylsulfinylacetic acid or benzylsulfonylacetic acid Hydrocarbyl-substituted sulfinyl and sulfonyl carboxylic acids are effective corrosion inhibitors for surfaces of various metals. In one embodiment, mineral acid compositions such as aqueous hydrochloric acid metal cleaning solutions exhibit diminished co... | 01/20/1987 |
| 4533478 | 3-Sulfoxy-1,2-propylene glycols-1-esters of tricyclo (4.2.2.02,5) dec-9-ene-3,4,7,8-tetracarboxylic acid 3-Sulfoxy-1,2-propylene glycols-1-esters of tricyclo (4.2.2.02,5) dec-9-ene-3,4,7,8-tetracarboxylic acid are prepared. These compounds are useful as surfactants, biocides and as cosurfactants in enhanced oil recovery.... | 08/06/1985 |
| 4517112 | Modified organophilic clay complexes, their preparation and non-aqueous systems containing them An organophilic clay gellant useful for gelling organic liquids is disclosed which comprises the reaction product of (a) a smectite-type clay having a cation exchange capacity of at least 75 milliequivalents per 100 grams of said clay; (b) a primary anion... | 05/14/1985 |
| 4485872 | Sulfone cosurfactants in enhanced oil recovery processes A surfactant system useful for oil recovery consisting essentially of a NaCl, a hydrocarbon sulfonate surfactant, such as a petroleum sulfonate, and a cosurfactant such as a sulfone or sulfolane derivative. In another embodiment, a C1 to C... | 12/04/1984 |
| 4476929 | Sulfoxide cosurfactants in enhanced oil recovery processes A surfactant system useful for oil recovery comprising a surfactant, such as a petroleum sulfonate, and a cosurfactant such as a sulfoxide.... | 10/16/1984 |
| 4326983 | Micellar solutions of thin film spreading agents comprising a polyether polyol The invention provides a homogeneous, micellar solution of a water-insoluble thin film spreading agent comprising: (a) from between about 5% and about 75% by weight of a polyether polyol; (b) from between about 2% and about 30% by weight of a hydrotropic ... | 04/27/1982 |
| 3953338 | Foam well cleanout using oligomeric sulfonic acids Organic disulfonic acids are produced by heating a sulfonate monomer at a temperature above 110°C. in the substantial absence of water. Olefin sulfonation product mixtures, hydroxyalkane sulfonic acids, alkane sultones, alkene sulfonic acids and mixtures... | 04/27/1976 |
| 3951823 | Foam well cleanout using oligomeric sulfonates Organic disulfonic acids are produced by heating a sulfonate monomer at a temperature above 110°C. in the substantial absence of water. Olefin sulfonation product mixtures, hydroxyalkane sulfonic acids, alkane sultones, alkene sulfonic acids and mixtures... | 04/20/1976 |
