Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 8105987 | Corrosion inhibitors for an aqueous medium One or more methods for inhibiting corrosion in an aqueous medium that contain a composition with a specified generic formula are disclosed. The aqueous medium can be contained in an oil or gas pipeline or refinery. ... | 01/31/2012 |
| 8105988 | Corrosion inhibitors for a fluid One or more methods for inhibiting corrosion in a fluid that contain a composition with a specified generic formula are disclosed. The fluid can be contained in an oil or gas pipeline or refinery. ... | 01/31/2012 |
| 8101556 | Treatment fluids for reduction of water blocks, oil blocks, and/or gas condensates and associated methods The present invention provides treatment fluids useful for subterranean operations, and more particularly, in at least one aspect, a treatment fluid that comprises a carrier fluid and a cationic surfactant comprising a cationic head group, a polar group attached to ... | 01/24/2012 |
| 8097567 | Well drilling fluids having clay control properties Clay is stabilized in the drilling of wells and other formation treatment for hydrocarbon production by the addition to the drilling or other fluid including a choline compound together with an formation control additive. ... | 01/17/2012 |
| 8093187 | Additive for viscoelastic fluid Composition and method for shortening the shear recovery time of cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of a co-gelling agent selected from triblock oligomeric compounds having hydrophilic (for exam... | 01/10/2012 |
| 8084402 | Method of using ionic liquids to inhibit or prevent the swelling of clay An ionic liquid may be used to inhibit the swelling and/or disintegration of clay in a subterranean formation. A subterranean clay-containing formation may be treated with the ionic liquid by contacting the formation with a well treatment composition containing the ... | 12/27/2011 |
| 7989403 | Corrosion inhibitors containing amide surfactants for a fluid A method of inhibiting corrosion in a fluid is disclosed. The method comprises: adding to the fluid an effective corrosion inhibiting amount of a synergist, a synergist when H2S is present in the fluid, or no synergist when H2S is present in th... | 08/02/2011 |
| 7989402 | Functionalized clay compositions for aqueous based drilling fluids An aqueous drilling fluid which contains a diquaternary ammonium cation functionalized clay which provides a substantially constant rheological profile, with respect to salinity, when incorporated into well drilling fluids. A clay/organic chemical composition includ... | 08/02/2011 |
| 7960315 | Treatment fluids comprising diutan and associated methods Methods are provided that include a method comprising providing a acidic treatment fluid that comprises a base fluid, an acid composition, and a gelling agent that comprises clarified diutan; and introducing the acidic treatment fluid into at least a portion of a su... | 06/14/2011 |
| 7947633 | Polycationic viscoelastic compositions Viscoelastic compositions are disclosed herein containing an effective amount of one or more random or structurally defined polycationic quaternary ammonium compounds for controlling the viscoelasticity of the composition. In at least one aspect, the present technol... | 05/24/2011 |
| 7939473 | Low toxicity shale hydration inhibition agent and method of use A low toxicity composition and method of reducing the swelling of clay in well comprising circulating in the well a water-based fluid comprising a functionally effective concentration of the additive formed from the following reaction of a tertiary amine of the foll... | 05/10/2011 |
| 7910524 | Treatment fluids comprising diutan and associated methods Treatment fluids are provided that include a treatment fluid comprising a base fluid and a gelling agent that comprises clarified diutan. In some embodiments, the treatment fluid is a subterranean treatment fluid. In some embodiments, the treatment fluid is a subter... | 03/22/2011 |
| 7893011 | Compositions comprising Sorel cements and oil based fluids A wellbore servicing composition comprising a metal oxide, a soluble salt, a surfactant and an oleaginous fluid. A wellbore servicing composition comprising magnesium oxide, a chloride or phosphate salt, an organophilic surfactant and an oleaginous fluid. A wellbore... | 02/22/2011 |
| 7884057 | Polycationic viscoelastic compositions Viscoelastic compositions are disclosed herein containing an effective amount of one or more random or structurally defined polycationic quaternary ammonium compounds for controlling the viscoelasticity of the composition. In at least one aspect, the present technol... | 02/08/2011 |
| 7879769 | Polycationic viscoelastic compositions Viscoelastic compositions are disclosed herein containing an effective amount of one or more random or structurally defined polycationic quaternary ammonium compounds for controlling the viscoelasticity of the composition. In one aspect, the present technology provi... | 02/01/2011 |
| 7846879 | Esterquat acidic subterranean treatment fluids and methods of using esterquats acidic subterranean treatment fluids The present invention relates to acidic treatment fluids that comprise an acid fluid and an ester-containing quaternary ammonium compound (“esterquat”) and methods of their use. One embodiment of the present invention provides a method of inhibiting metal corros... | 12/07/2010 |
| 7776798 | Quaternary ammonium salts as thickening agents for aqueous systems This invention relates to the use of alkyl amido quaternary ammonium salts, and formulations thereof, as thickening agents in aqueous based fluids, especially those used in oil field applications. The quaternary ammonium salts of the present invention exhibit improv... | 08/17/2010 |
| 7772165 | Polycationic viscoelastic compositions Viscoelastic compositions are disclosed herein containing an effective amount of one or more random or structurally defined polycationic quaternary ammonium compounds for controlling the viscoelasticity of the composition. In at least one aspect, the present technol... | 08/10/2010 |
| 7763572 | Compositions comprising quaternary material and sorel cements A wellbore servicing composition comprising a metal oxide, a soluble salt and a viscosifier wherein the viscosifier comprises a quaternary amide, a quaternary amide ester, or combinations thereof. A wellbore servicing composition comprising magnesium oxide, a chlori... | 07/27/2010 |
| 7749946 | Crosslinking composition for fracturing fluids Improved gelled hydrocarbon fracturing fluids include a gelling agent and a crosslinking composition including a crosslinking agent and a catalytic agent. The catalytic agent is a fatty quaternized amine, which includes monoalkyl benzyl quaternized amines. ... | 07/06/2010 |
| 7741251 | Compositions and methods of stabilizing subterranean formations containing reactive shales The present invention relates to well bore stabilization and, more particularly, to treatment fluids that may reduce the tendency of shales to swell and associated methods. In some embodiments, the present invention provides a method of stabilizing a subterranean fo... | 06/22/2010 |
| 7651982 | Methods and aqueous acid solutions for acidizing wells containing sludging and emulsifying oil Methods and aqueous acid solutions for acidizing wells containing sludging and emulsifying oil are disclosed. An aqueous acid solution of the invention comprises water, hydrochloric acid, a cationic hydrochloric acid corrosion inhibitor and a conjugate ion pair of a... | 01/26/2010 |
| 7638468 | Surfactant based viscoelastic fluids The invention relates to surfactant based viscoelastic fluids for enhancing the productivity of a hydrocarbon-bearing formations, such as oil wells. The viscoelastic fluids of the invention have particular applicability in acid fracturing of subterranean formations ... | 12/29/2009 |
| 7550413 | Fluid loss control agents for viscoelastic surfactant fluids Alkaline earth metal compounds may be fluid loss control agents for viscoelastic surfactant (VES) fluids used for well completion or stimulation in hydrocarbon recovery operations. The VES fluid may further include proppant or gravel, if it is intended for use as a ... | 06/23/2009 |
| 7521400 | Gelled oil with surfactant A viscoelastic gelled oil, for example gelled diesel or paraffin oil, is made with a gelling agent, for example a phosphate ester, a metal carboxylate, for example an aluminum carboxylate, and a gel-enhancing surfactant, for example a zwitterionic surfactant, for ex... | 04/21/2009 |
| 7435706 | Thinners for invert emulsions A method of reducing the viscosity of oil-based drilling fluids and well service fluids at low temperatures and a thinner compound for use in such drilling fluids and well service fluids is disclosed. The method comprises adding to said drilling fluids or well servi... | 10/14/2008 |
| 7435845 | Corrosion and gas hydrate inhibitors having improved water solubility and increased biodegradability Corrosion and gas hydrate inhibitors having improved water solubility and increased biodegradability The invention thus provides the use of compounds of the formula (1) where R... | 10/14/2008 |
| 7429620 | Surfactant package for well treatment and method using same A surfactant blend for servicing wells includes a first non-ionic surfactant having a hydrophilic-lipophilic balance of between about 10 and about 15; a second non-ionic surfactant having a hydrophilic-lipophilic balance of between about 2 and about 6; and an anioni... | 09/30/2008 |
| 7427583 | Aqueous fracturing fluid The invention concerns an aqueous viscoelastic fracturing fluid for use in the recovery of hydrocarbons. According to the invention, the fluid comprises a viscoelastic surfactant and a hydrophobically-modified polymer wherein the concentration of the hydrophobically... | 09/23/2008 |
| 7407916 | Foamed treatment fluids and associated methods Foamed treatment fluids comprising water, a gas, and a foaming and foam stabilizing surfactant mixture comprising an alkali salt of an alkyl ether sulfate, wherein the alkali salt of the alkyl ether sulfate comprises an alkali salt of a C6-10 alkyl ether ... | 08/05/2008 |
| 7402549 | Viscoelastic surfactant rheology modification A method for shortening the shear recovery time of cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of a rheology enhancer selected from partially hydrolyzed polyvinyl ester and partially hydrolyzed polyacryl... | 07/22/2008 |
| 7399732 | Fracturing fluid containing amphoteric glycinate surfactant An improved method and fracturing fluid for hydraulic fracturing of a subterranean formation, the fracturing fluid including a surfactant, a water soluble or dispersible anionic organic salt, an acid and a low molecular weight organic solvent. ... | 07/15/2008 |
| 7387986 | Viscoelastic surfactant rheology modification A method for shortening the shear recovery time of cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of an amphiphilic polymeric rheology enhancer containing at least one portion that is a partially hydrolyzed... | 06/17/2008 |
| 7381689 | Methods for inhibiting hydrate blockage in oil and gas pipelines using amide compounds A method and an amide composition used therein for inhibiting, retarding, mitigating, reducing, controlling and/or delaying formation of hydrocarbon hydrates or agglomerates of hydrates. The method may be applied to prevent or reduce or mitigate plugging of conduits... | 06/03/2008 |
| 7378378 | Rheology enhancers A method for increasing the rate of shear rehealing of fluids made with cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of a rheology enhancer package containing, for example a polyethylene glycol-polypropyl... | 05/27/2008 |
| 7373977 | Process for oil recovery employing surfactant gels A process for recovering oil by injecting into a subterranean oil-bearing reservoir through one or more injection wells, an aqueous solution containing one or more amphoteric alkyl amido betaine surfactants that form a viscoelastic gel reducing interfacial tension a... | 05/20/2008 |
| 7358215 | Quaternary ammonium salts as thickening agents for aqueous systems This invention relates to the use of alkyl amido quaternary ammonium salts, and formulations thereof, as thickening agents in aqueous based fluids, especially those used in oil field applications. The quaternary ammonium salts of the present invention exhibit improv... | 04/15/2008 |
| 7343978 | Scale dissolver fluid A scale dissolver fluid for dissolving scale in a subterranean hydrocarbon-bearing formation comprises an effective amount of a scale dissolver formulation and an effective amount of a surfactant for controlling the viscosity of the fluid. In use, formation hydrocar... | 03/18/2008 |
| 7341107 | Viscoelastic acid An acidic viscoelastic surfactant fluid composition is formulated with an acid, for example hydrochloric acid, a cationic surfactant, for example a quaternary amine, and a break-enabling salt, for example NH4Cl. The fluid composition has low viscosity as ... | 03/11/2008 |
| 7326670 | Well service fluid and method of making and using the same A well service fluid comprising one or more anionic viscoelastic surfactants and one or more polymers is described. The fluids can contain an aqueous or non-aqueous fluid and/or a buffer for adjusting the pH of the fracturing fluid. The well service fluid can be use... | 02/05/2008 |
