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| Number | Title | Issue Date |
| 7767630 | Method of treating a well with a gel stabilizer The present invention relates to the use of chalcogen heterocyclic electron donating compounds as thermal decomposition reduction additives for gels used in well treatment fluids such as drilling fluids, fracturing fluids, and well completion and workover fluids. | 08/03/2010 |
| 7572757 | Method of treating a well with a gel stabilizer The present invention relates to the use of chalcogen heterocyclic electron donating compounds as thermal decomposition reduction additives for gels used in well treatment fluids such as drilling fluids, fracturing fluids, and well completion and workover fluids. | 08/11/2009 |
| 7201227 | Method and composition for treating a subterranean formation with splittable foams Disclosed herein is a method of treating a subterranean formation utilizing a fluid having a splittable foamer, i.e., a fluid that creates a stable foam when it contacts the formation but that loses its ability to foam as it remains in contact with the formation for... | 04/10/2007 |
| 6989355 | Under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes The present invention is directed to an under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes. The present invention is also directed to a method for enhancing the recovery of oil from a subterranean reservoir which method emplo... | 01/24/2006 |
| 6849582 | Method of oil/gas well stimulation Stimulation, particularly fracturing or acidising, of hydrocarbon wells having bores leading to hydrocarbon bearing uses a fluid including a continuous phase of or including a compound of the formula (1): (R2)p—Ph—(CH2)m | 02/01/2005 |
| 6818599 | Method for in situ forming of unstable oil in water emulsion, especially as well servicing fluid A method for in situ forming of an unstable oil in water emulsion includes the steps of providing a mixture of an aqueous alkali salt solution and a surfactant, and pumping the mixture down a well containing a crude hydrocarbon having an API gravity of less than or ... | 11/16/2004 |
| 6234183 | Method for removing deposits comprising heavy hydrocarbonaceous materials and finely divided inorganic materials from a flow line using a surfactant composition A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided inorganic particulate matter from wellbore and flowline surfaces using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, a causti... | 05/22/2001 |
| 6059992 | Gas treating solution corrosion inhibitor Corrosion in aqueous alkanolamine, physical solvents, or combination of alkanolamine and physical solvent solutions used to remove acid gases from natural gas, synthetic gas, or light hydrocarbon streams can be reduced by addition of mixtures of oxygen sc... | 05/09/2000 |
| 5874386 | Method for cleaning drilling fluid solids from a wellbore using a surfactant composition A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided drilling fluid solids from a wellbore using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol by i... | 02/23/1999 |
| 5789352 | Well completion spacer fluids and methods A well completion spacer fluid is provided which is particularly suitable for separating a cement slurry from drilling fluid in primary cementing operations. The well completion spacer fluid is also useful for separating other potentially incompatible flu... | 08/04/1998 |
| 5586608 | Method of making an anti-bit balling well fluid using a polyol having a cloud point, and method of drilling A method of making a well fluid for use in a well which includes the steps of determining uphole and downhole operating temperatures in the well, and then contacting a well lubricant with a lubricating additive, wherein the lubricating additive has a clou... | 12/24/1996 |
| 5556832 | Solids-free, essentially all-oil wellbore fluid A solids-free, essentially all-oil wellbore fluid comprises (a) an organic fluid having (i) a melting point less than about 20° C. (about 68° F.), (ii) a flash point greater than about 54.4° C. (about 130° F.), and (iii) a dipole moment greater than 0... | 09/17/1996 |
| 5374361 | Well cleanout using caustic alkyl polyglycoside compositions Oil and gas wells and injection wells are cleaned of oil-based drilling muds, pipe thread compounds, other oil contaminants, cement and contaminants in injection water by a composition comprising fresh water or seawater, one-half to ten percent concentrat... | 12/20/1994 |
| 5330662 | Compositions containing combinations of surfactants and derivatives of succinic acylating agent or hydroxyaromatic compounds and methods of using the same This invention relates to a composition comprising a mixture of a brine and a liquid hydrocarbon, and (A) an emulsifying amount of (i) at least one reaction product of a hydrocarbyl-substituted succinic acylating agent, and at least one of (a) ammonia, (b... | 07/19/1994 |
| 5292480 | Acid-anhydride esters as oil field corrosion inhibitors A corrosion inhibitor with excellent film forming and film persistency characteristics may be produced by first reacting C18 unsaturated fatty acids with maleic anhydride or fumaric acid to produce the fatty acid Diels-Alder adduct or the fatty... | 03/08/1994 |
| 5283001 | Process for preparing a water continuous emulsion from heavy crude fraction A process for preparing a water continuous emulsion from heavy crude fraction. A process for preparing a double emulsion.... | 02/01/1994 |
| 5273682 | Viscosity control additives for foaming mixtures The method for the enhanced recovery of hydrocarbons from a hydrocarbon bearing reservoir during gas injunction into the reservoir comprises the at least periodic injection of steam and a foam-forming mixture into the reservoir from a known depth interval... | 12/28/1993 |
| 5260268 | Methods of drilling well boreholes and compositions used therein The present invention relates to a method comprising the steps of introducing into a well borehole a composition, comprising water and an amount, sufficient to reduce drilling torque, prevent sticking or twisting of a pipe during drilling, or release a st... | 11/09/1993 |
| 5152907 | Solvent systems for use in oil and gas wells There is provided a solvent system for use in oil wells and gas wells, which solvent system comprises a hydrocarbon solvent, such as a mixture of xylenes, a substantially water-soluble alcohol, such as a mixture of methanol and a propanol, and a substanti... | 10/06/1992 |
| 5110487 | Enhanced oil recovery method using surfactant compositions for improved oil mobility A composition for, and an improved process of, enhancing petroleum recovery from a petroleum reservoir by injecting into the reservoir a surfactant composition which includes at least one anionic surfactant component and a non-ionic surfactant component i... | 05/05/1992 |
| 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 major proportion of a liquid or gaseous mercaptan, a minor p... | 04/14/1992 |
| 5084210 | Corrosion inhibitor A corrosion inhibitor including an acetylinic alcohol is disclosed which is used in connection with a chlorine dioxide process for controlling biomass and cleaning water injection wells and oil producing wells by injecting the chlorine dioxide oxidant int... | 01/28/1992 |
| 5084192 | Method and composition for preventing the formation of sludge in crude oil An aqueous acidic composition useful for conducting a formation acidizing method is disclosed. The composition, which is comprised of a blend of acetic acid, formic acid, a fatty alkyl quaternary ammonium salt, a fatty aralkyl quaternary ammonium salt and... | 01/28/1992 |
| 5083613 | Process for producing bitumen A process for producing bitumen employing a borehole that has been drilled into a subterranean hydrocarbon-bearing reservoir having a hydrocarbon. A void space is created at the bottom of the borehole. A bundle of spring-loaded guide tubes is inserted thr... | 01/28/1992 |
| 5082059 | Use of hydrocarbon-rich gels as fracturing fluids The present invention relates to the use of hydrocarbon-rich gels as fracturing fluids and also to fracturing fluids which are composed of a hydrocarbon-rich gel and an auxiliary.... | 01/21/1992 |
| 5062969 | Crosslinkable interpolymers The present invention relates to novel crosslinkable interpolymers and methods of use in treating subterranean formations. The novel interpolymers comprise a water soluble monomer, a hydrophobe monomer, and vicinal diol monomer polymerized to form high mo... | 11/05/1991 |
| 5058678 | Method for preventing the formation of sludge in crude oil An aqueous acidic composition useful for conducting a formation acidizing method is disclosed. The composition, which is comprised of a blend of acetic acid, formic acid, a fatty alkyl quaternary ammonium salt, a fatty aralkyl quaternary ammonium salt and... | 10/22/1991 |
| 5033547 | Method for decreasing mobility of dense carbon dioxide in subterranean formations Oil recovery by carbon dioxide flooding is increased by adding surfactants to the carbon dioxide at high pressures such that an emulsion with water will be formed in the pore spaces of rock. The emulsion diverts flow of carbon dioxide to rock containing h... | 07/23/1991 |
| 5034139 | Polymer composition comprising phosphorous-containing gelling agent and process thereof Water absorbent polymers provided, in the form of a thixotropic hydrocarbon gel, demonstrate controlled water absorption. This property enables improved usage of such polymers in the reduction of the loss of circulation fluid or as a viscous sweep in the ... | 07/23/1991 |
| 5030366 | Spacer fluids Spacer fluids providing an effective buffer between drilling fluids and cement slurries during well completion. The spacer fluids comprise a sulfonated styrene copolymer dispersant and one or more additional components such as surfactants, viscosifiers an... | 07/09/1991 |
| 5013462 | Method for improving production of viscous crude oil This invention concerns methods for improving the mobility and pipeline transport of a viscous crude oil and the productivity of viscous crude oil producing wells by forming an oil-in-water emulsion with said oil and from 20 to 80% by weight of water in t... | 05/07/1991 |
| 5009267 | Method for temporarily reducing permeability of subterranean formations A fluid loss control additive for aqueous fracturing media including a blend of two or more modified starches or a blend of one or more natural starches with one or more modified starches.... | 04/23/1991 |
| 5008026 | Well treatment compositions and method A concentrate which forms an acid and/or water external microemulsion when added to a treatment fluid. The concentrate comprises an alkyl alcohol having in the range of from 4 to 18 carbon atoms, an emulsifying agent, a mutual solvent selected from the gr... | 04/16/1991 |
| 5008019 | Decontamination of earth formations Water supply contamination is reduced within a formation or eliminated in a flooding procedure utilizing an alkaline aqueous solution. Biodegradable polymer provides a desired viscosity and mobility. Biodegradable surfactant and alkali provide any needed ... | 04/16/1991 |
| 5003060 | Readily dispersed/dissolved porous biopolymer granules Solid, free-flowing and nondusting porous biopolymer, e.g., xanthan gum, granules are produced in fluidized bed and are quickly dispersed/dissolved in aqueous media for use as thickening agents for a wide variety of applications.... | 03/26/1991 |
| 4997581 | Additive and method for temporarily reducing permeability of subterranean formations A fluid loss control additive for aqueous fracturing media including a blend of two or more modified starches or a blend of one or more natural starches with one or more modified starches.... | 03/05/1991 |
| 4983319 | Preparation of low-viscosity improved stable crude oil transport emulsions A process for the preparation of low-viscosity improved stable crude oil transport emulsions. The process comprises producing a hydrocarbon crude, and mixing the produced hydrocarbon crude with an emulsifying composition(s) which contains water and is cap... | 01/08/1991 |
| 4981601 | Reducing sludging during oil well acidizing An improved method and composition for reducing the production of sludge when contacting a subterranean formation containing oil which is subject to sludging with an aqueous acid solution. An anti-sludging agent such as a quaternary ammonium salt of a fat... | 01/01/1991 |
| 4978365 | Preparation of improved stable crude oil transport emulsions A process for the production of an oil-in-water emulsion for pipeline transmission. The process comprises producing a hydrocarbon crude, and mixing the produced hydrocarbon crude with an emulsifying composition(s) which contains water and is capable of as... | 12/18/1990 |
| 4970007 | Aqueous surfactant mixtures, and the use thereof in the recovery of crude oil Surfactant mixtures made from 5 to 80% by weight of an ether sulfonate, 5 to 80% by weight of an alkyl or alkylphenol polyglycol ether and 10 to 80% by weight of an alkanesulfonate, petroleumsulfonate or alkylbenzenesulfonate. This combination of surfacta... | 11/13/1990 |
