Preventing Contaminant Deposits In Petroleum Oil Conduits Patents (Class 507/90)
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Patent number: 7615516Abstract: Useful microemulsions have corrosion inhibitors in the internal phase and an external phase and at least one surfactant that helps define the emulsion. The corrosion inhibitor itself may have its pH adjusted so that it also serves the role of surfactant. The corrosion inhibitors form microemulsions with particle or droplet diameters of about 10 to about 300 nm. The microemulsions may be oil-in-water, water-in-oil or bi-continuous.Type: GrantFiled: January 18, 2006Date of Patent: November 10, 2009Assignee: Baker Hughes IncorporatedInventors: Jiang Yang, Vladimir Jovancicevic
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Patent number: 7615102Abstract: The invention relates to the use of compounds of formula (1) as corrosion and gas hydrate inhibitors. In said formula: R1 and R2 independently of one another represent C1 to C22 alkyl, C2 to C22 alkenyl, C6 to C30 aryl or C7 to C30 alkyl aryl; R3 represents M, hydrogen or an organic group with between 1 and 100 carbon atoms that optionally contains heteroatoms; A represents a C2 to C4 alkene group; B represents an optionally substituted C1 to C10 alkene group; D represents an ethylene group that is substituted with an organic group comprising between 1 and 600 carbon atoms; X and Y independently of one another represent O or NR4; R4 represents hydrogen, C1 to C22 alkyl, C2 to C22 alkenyl, C6 to C30 aryl or C7 to C30 alkyl aryl; M represents a cation; and n represents a number between 0 and 30.Type: GrantFiled: September 28, 2005Date of Patent: November 10, 2009Assignee: Clariant Produkte (Deutschland) GmbHInventors: Dirk Leinweber, Michael Feustel
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Publication number: 20090263887Abstract: The present disclosure relates to isolation and identification of unique Pseudomonas stutzeri strains that can grow on crude oil under denitrifying conditions and are useful in oil recovery.Type: ApplicationFiled: April 18, 2008Publication date: October 22, 2009Applicant: E. I. DUPONT DE NEMOURS AND COMPANYInventors: Sharon Jo Keeler, Robert D. Fallon, Edwin R. Hendrickson, Linda L. Hnatow, Scott Christopher Jackson, Michael P. Perry
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Publication number: 20090233817Abstract: Compositions and methods for reducing wax deposition from a crude petroleum during transmission of the crude petroleum through a pipeline are provided. Compositions and methods of testing the deposition of wax from a petroleum sample are also provided.Type: ApplicationFiled: March 14, 2008Publication date: September 17, 2009Inventors: Robert M. Kriegel, Jack F. Tinsley, Rajesh K. Saini, Robert K. Prud'homme, Ian D. Robb
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Patent number: 7584791Abstract: Methods are provided that include a method comprising providing a treatment fluid comprising a base fluid and a gelling agent that comprises a diutan composition; providing a breaker that comprises an acid composition; allowing the breaker to interact with the treatment fluid; and allowing the viscosity of the treatment fluid to decrease. In some embodiments, the treatment fluid may comprise a base fluid, a gelling agent that comprises a diutan composition, and a breaker that comprises an acid composition. In some embodiments, the treatment fluid may be introduced into a portion of the subterranean formation at or above a pressure sufficient to create or enhance one or more fractures in the portion of the subterranean formation. Additional methods are also provided.Type: GrantFiled: February 8, 2007Date of Patent: September 8, 2009Assignee: Halliburton Energy Services, Inc.Inventors: Ian D. Robb, Richard W. Pauls, Lulu Song
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Patent number: 7585816Abstract: A method for inhibiting the formation of gas hydrates in a petroleum fluid having hydrate-forming constituents is claimed. More specifically, the method can be used to treat a petroleum fluid, such as natural gas conveyed in a pipe, to inhibit the formation of a hydrate flow restriction in the pipe. The preferred hydrate inhibitors used for practicing the method comprise substantially water soluble homopolymers and copolymers of isopropylmethacrylamide derivatives which have a bimodal molecular weight distribution.Type: GrantFiled: June 15, 2004Date of Patent: September 8, 2009Assignee: ExxonMobil Upstream Research CompanyInventors: Karla S. Colle, Larry D. Talley, John M. Longo
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Publication number: 20090221451Abstract: Embodiments of the invention relate to a process for providing a pumpable hydrate slurry in a hydrocarbon pipeline fluid mixture having a water-cut greater than about 50 volume percent. In one or more embodiments the process comprises treating the fluid mixture with an anti-agglomerant and adding water to the fluid mixture in an amount sufficient to lower the gas-water ratio sufficiently to achieve a pumpable hydrate slurry. Also disclosed are methods for producing hydrocarbons utilizing a process for providing a pumpable hydrate slurry in a hydrocarbon pipeline fluid mixture having a water-cut greater than about 50 volume percent.Type: ApplicationFiled: February 13, 2007Publication date: September 3, 2009Inventor: Larry D. Talley
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Publication number: 20090143252Abstract: A homopolymer of a monomer selected from those having the general formula: wherein: R1 is H or CH3; R2 is H or an alkyl group having from 1 to about 4 carbon atoms; A is a straight or branched chain alkyl group having from 1 to 10 carbon atoms; and R5, R6, and R7 each are independently an alkyl group having from 1 to 6 carbon atoms; or a copolymer of such monomers as acrylate, acrylamide or methacrylamide may be used to disperse metal sulfides prior to their forming scales during the production and transportation of crude oil. Terpolymers of dimethyldiallylammonium salt, 2-hydroxypropyl acrylate; and acrylic acid may also be used for this purpose. The production fluid may also be treated with a compound that promotes the formation of dispersible sulfide scales.Type: ApplicationFiled: June 9, 2008Publication date: June 4, 2009Applicant: BAKER HUGHES INCORPORATEDInventors: Marc N. Lehmann, Faezeh F. Firouzkouhi, Michael P. Squicciarini, Tauseef Salma
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Patent number: 7541315Abstract: Disclosed are paraffin inhibitors prepared by admixing a polymer having the characteristic of inhibiting paraffin crystalline growth in formation fluid from oil and gas wells with a first solvent selected from the weak to moderate wax solvents and a second solvent selected from the strong wax solvents. Exemplary weak to moderate wax solvents include benzene, toluene, xylene, ethyl benzene, propyl benzene, trimethyl benzene and mixtures thereof. Exemplary strong wax solvents include cyclopentane, cyclohexane, carbon disulfide, decalin and mixtures thereof. The solvent system disclosed has desirably better solubility with the polymers, even at reduced temperatures, than either solvent alone. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will be used to interpret or limit the scope or meaning of the claims.Type: GrantFiled: May 14, 2007Date of Patent: June 2, 2009Assignee: Baker Hughes IncorporatedInventor: David Wayne Jennings
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Publication number: 20090124520Abstract: A method for transporting a fluid comprising a clathrate forming gas through a transportation system including a pipeline. The method involves subjecting the fluid to clathrate forming temperature and pressure conditions and introducing sufficient of a clathrate forming host to convert substantially all of the gas to clathrate and to form a flowable slurry. The flowable slurry is then conveyed through a pipeline to a destination. An alternative method involves transporting the fluid by means of a ring pipeline containing a carrier fluid, which includes clathrate inhibitors. Also provided is a heat pump whose working fluid is a clathrate forming composition.Type: ApplicationFiled: November 3, 2005Publication date: May 14, 2009Applicant: Heriot-Watt UniversityInventor: Bahman Tohidi
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Publication number: 20090111715Abstract: A method to remove hydrate plugs in a production system by passing a non-hydrate-forming or a hydrate-forming gas, which forms hydrates at a higher pressure than the existing hydrate, through the flow-restricting hydrate.Type: ApplicationFiled: April 14, 2008Publication date: April 30, 2009Inventors: Adam L. Ballard, Norman D. McMullen, George J. Shoup
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Publication number: 20090111714Abstract: A drag reducing composition comprising at least one non-polyalphaolefin polymer having an average particle size in the range of from about 5 to about 800 micrometers. The non-polyalphaolefin polymer can initially be formed via emulsion polymerization. The initial polymer particles can then be at least partially consolidated and then reduced in size and suspended in a carrier fluid. The resulting drag reducing composition can be added to a hydrocarbon-containing fluid to decrease the pressure drop associated with the turbulent flow of the hydrocarbon-containing fluid through a conduit.Type: ApplicationFiled: October 26, 2007Publication date: April 30, 2009Applicant: CONOCOPHILLIPS COMPANYInventors: Timothy L. Burden, Ray L. Johnston, William Franklin Harris, Kenneth W. Smith, Wayne R. Dreher, Stuart N. Milligan
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Publication number: 20090075844Abstract: The productivity of hydrocarbons from hydrocarbon-bearing calcareous or siliceous formations is enhanced by contacting the formation with a well treatment composition which contains a hydrofluoric acid source, a boron containing compound and a phosphonate acid, ester or salt thereof.Type: ApplicationFiled: September 18, 2007Publication date: March 19, 2009Inventors: Mingjie Ke, Qi Qu
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Publication number: 20090071653Abstract: A composition for preventing or removing the build-up of a fluid film on a target surface of wells, processing equipment or geological formations and a method of using same is provided. The composition can be non-aqueous and alkaline and can include sodium carbonate, sodium phosphate tribasic, sodium hydroxide and sodium metasilicate. The method includes preparing the composition and then delivering the composition to the target surface. The composition can further include a non-aqueous carrier and/or a pH buffer.Type: ApplicationFiled: May 6, 2008Publication date: March 19, 2009Applicant: Ramtha Energy Solutions Inc.Inventor: KENNETH DWAYNE HODGE
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Publication number: 20090054268Abstract: The invention provides for the use of substituted polyethyleneimines containing structural units of the formula (1), where R1 is H, C1-C30-alkyl, C1-C30-alkenyl or C7-C30-alkylaryl R2, R3, R4, R5 are each independently H or C1-C6-alkyl, in amounts of from 0.01 to 2% by weight to prevent the formation of gas hydrates in aqueous phases which are in contact with a gaseous, liquid or solid organic phase.Type: ApplicationFiled: August 1, 2008Publication date: February 26, 2009Inventors: Dirk Leinweber, Alexander Roesch, Michael Feustel
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Publication number: 20090036329Abstract: Naphthenic acid solids and/or emulsions can be inhibited by introducing an additive to crude oil prior to or concurrent with the deprotonation of the naphthenic acids present in the crude oil. The additives may be surfactants and can be amines, quaternary ammonium compounds, quaternary phosphonium compounds, and mixtures of both. The additives may also be linear compounds having at least two carboxylic acid or acrylic acid functional moieties.Type: ApplicationFiled: August 22, 2008Publication date: February 5, 2009Applicant: BAKER HUGHES INCORPORATEDInventors: Justin D. Debord, Piyush Srivastava, Christopher Gallagher, Samuel Asomaning, Paul Hart
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Patent number: 7481276Abstract: Corrosive effects arising during oilfield treatment applications are inhibited and/or prevented by introducing into an oil or gas well at least one compound of formula I: wherein: R1 is independently H, —[—CnH2nO—]a—H, or an alkyl group having from 1 to about 24 carbon atoms; R2 is independently H or —[—CnH2nO—]b—H, R3 is independently —[—CH2]c—, or —Cd2d—[—OCnH2n—]e—, R4 is independently H or —[—CnH2nO—]f—H, R5 is independently H or —[—CnH2nO—]g—H, a is from about 1 to about 8; b+f+g is between 0 to about 30; c is from about 1 to 6; d is from about 1 to 6; e is from about 1 to about 8; and n is 2 or 3. Such corrosive effects are especially inhibited in the treatment of sour wells where H2S corrosion is a potential problem as well as conduits used during the treatment of subterranean formations.Type: GrantFiled: May 12, 2006Date of Patent: January 27, 2009Assignee: BJ Services CompanyInventors: Ronald L. Hoppe, Richard L. Martin, Marek K. Pakulski, Thame D. Schaffer
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Publication number: 20080305971Abstract: A treatment fluid for treating a subterranean formation penetrated by a wellbore is formed from an aqueous medium, a diutan heteropolysaccharide having a tetrasaccharide repeating unit in the polymer backbone and a peroxide breaker. A method of treating a subterranean formation penetrated by a wellbore may be carried out by introducing the treatment fluid into the formation through the wellbore. Breaking aids or catalysts may also be used with the treatment fluid.Type: ApplicationFiled: June 20, 2008Publication date: December 11, 2008Inventors: Leiming Li, Syed Ali, Oscar Bustos, Lijun Lin, Curtis L. Boney
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Patent number: 7452848Abstract: Certain substituted amines, alkylenediamines or polyamines, and derivatives of these, are suitable for use in preventing, inhibiting, or otherwise modifying crystalline gas hydrate formation. These inhibitors include compounds from any of the following groups. The substituents R1-R5 may be hydrocarbyl groups or, in some cases, polyhydroxyalkyl groups or (CH2)p—COO? in which p is either 1 or 2.Type: GrantFiled: April 26, 2005Date of Patent: November 18, 2008Assignee: Air Products and Chemicals, Inc.Inventors: Ingrid Kristine Meier, Richard Joseph Goddard, Michael Edward Ford
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Patent number: 7438797Abstract: A method of reducing the aggregation and deposition of asphaltene from a fluid containing asphaltene, such as crude oil, which method comprises the addition to the fluid of a compound of formula (1): wherein A is an optionally substituted ring system containing 6 to 14 carbon atoms; n is at least 1 and may equal the number of positions available for substitution in A; each X is independently a linker group; and each R is independently a hydrocarbyl group containing 10 to 25 carbon atoms.Type: GrantFiled: July 26, 2002Date of Patent: October 21, 2008Assignee: iC16 LimitedInventors: Rodney John Gochin, Alec Smith
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Publication number: 20080248974Abstract: This invention provides a method for inhibiting scale formation within a hydrocarbon producing system, said method comprising contacting said system with a copolymer formed from a diallyl ammonium salt and at least one other monomer.Type: ApplicationFiled: August 2, 2006Publication date: October 9, 2008Applicant: CHAMPION TECHNOLOGIES LTDInventors: Ping Chen, Xing Yan, Thomas Hagen, Harry Montgomerie
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Patent number: 7419937Abstract: A method of delivering chemicals such as scale inhibitor into a wellbore producing fluids includes providing the chemicals, in a slow-release form, in a container located in the path of the production fluids so that the production fluids pass through the container. Preferably, the container is suspended in the production tubing and periodically retrieved from the well to be refilled.Type: GrantFiled: December 19, 2003Date of Patent: September 2, 2008Assignee: Schlumberger Technology CorporationInventors: Brett Rimmer, Alan Saxon, Francisco Fragachan
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Patent number: 7417009Abstract: A paraffin inhibitor comprising a polymer composed of about (a) 1 to about 98 weight percent of one or more C1-C30 alkyl esters of acrylic acid; (b) about 1 to about 98 weight percent of one or more C1-C30 alkyl esters of methacrylic acid; (c) and about 1 to about 30 weight percent of one or more unsaturated monomers selected from the group consisting of (meth)acrylamide monomers, vinyl aromatic monomers, vinyl cycloalkyl monomers, vinyl heterocyclyl monomers, vinyl esters of aliphatic acids, vinyl esters of aromatic acids, vinyl esters of heterocyclic acids, maleimide and maleic anhydride wherein the alkyl ester portion of one of (a) or (b) is C10-C30 alkyl, compositions comprising the polymer and methods of using the polymer to inhibit the deposition of paraffin from oil.Type: GrantFiled: March 26, 2004Date of Patent: August 26, 2008Assignee: Nalco CompanyInventor: Olga E. Shmakova-Lindeman
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Publication number: 20080194428Abstract: Methods are provided that include a method comprising providing a treatment fluid comprising a base fluid and a gelling agent that comprises a clarified diutan; and introducing the treatment fluid into at least a portion of a subterranean formation. In some embodiments, the treatment fluid may be placed into at least a portion of a subterranean formation at a pressure sufficient to create or enhance at least one fracture in the subterranean formation. In some embodiments, the treatment fluid may be introduced into a pipeline. Additional methods are also provided.Type: ApplicationFiled: February 8, 2007Publication date: August 14, 2008Inventors: Thomas D. Welton, Richard W. Pauls, Lulu Song, Jason E. Bryant, Sean R. Beach, Ian D. Robb
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Publication number: 20080194427Abstract: 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 subterranean formation. In some embodiments, the acidic treatment fluid may be allowed to interact with a component of the subterranean formation so that the component is at least partially dissolved. In some embodiments, the acidic treatment fluid may be introduced into a pipeline. Additional methods are also provided.Type: ApplicationFiled: February 8, 2007Publication date: August 14, 2008Inventors: Thomas D. Welton, Richard W. Pauls, Lulu Song, Jason E. Bryant, Sean R. Beach, Ian D. Robb
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Patent number: 7381689Abstract: 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, pipes, transfer lines, valves, and other places or equipment where hydrocarbon hydrate solids may form under the conditions. At least one amide compound is added into the process stream, where the compound may be mixed with another compound selected from amino alcohols, esters, quaternary ammonium, phosphonium or sulphonium salts, betaines, amine oxides, other amides, simple amine salts, and combinations thereof.Type: GrantFiled: August 13, 2004Date of Patent: June 3, 2008Assignee: Champion Technologies, Inc.Inventors: Vaithilingam Panchalingam, Michael Gregory Rudel, Scot Harris Bodnar
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Publication number: 20080113878Abstract: The invention relates to polymers with a mean molecular weight of between 500 and 500,000 g/mol that can be produced as follows: A) reaction of a compound of formula 1, in which n stands for 0, 1 or 2 and A for an arbitrarily substituted C1-C40 group with a compound of the formula 2 B(OH)m in which m is from 2 to 10 and B is a represents an arbitrarily substituted C2-C40 group, B) subsequently reaction of the product thus obtained with a nitrogen-containing carboxylic acid which comprises from 1 to 20 carbon atoms, where the molar ratio between the number of free OH groups of the polyester obtained in step A and the nitrogen-containing carboxylic acid is between 1:0.1 and 1:1. The polymers are used to inhibit gas hydrate formation.Type: ApplicationFiled: February 1, 2006Publication date: May 15, 2008Inventors: Dirk Leinweber, Michael Feustel
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Publication number: 20080108518Abstract: This invention is a method of using sulfite salts to remove dispersed sulfur from fluids encountered in oil and gas production, transport and refining in which sulfite salts are used to convert the dispersed sulfur into benign, water-soluble sulfur species which remain in aqueous solution. Sulfur precipitation and deposition in conduits and processing equipment is thereby prevented.Type: ApplicationFiled: November 2, 2006Publication date: May 8, 2008Inventors: J. Caleb Clark, Stephen J. Homer, Kailash Sawhney, Frank A. Cosman
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Publication number: 20080058226Abstract: Pellets can be injected into oil and gas production equipment that may contain stagnant or slow moving system fluids to treat the stagnant or slow moving system fluids to prevent conditions such as corrosion. The pellets have a density such that they may be moved through the equipment by system fluids passing therethrough. When the pellets come into contact with the stagnant or slow moving system fluids, sufficient pellets enter the stagnant or slow moving system fluids to treat it. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.Type: ApplicationFiled: August 30, 2007Publication date: March 6, 2008Applicant: Baker Hughes IncorporatedInventors: Michael Greaves, Steven Jeremy Weghorn, Hani S. Zaki
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Publication number: 20080015121Abstract: A sterically hindered quaternary ammonium composition is prepared by contacting a solvent having hydroxyl functionality, a halohydrin, and a sterically hindered tertiary amine, under reaction conditions sufficient to produce a sterically hindered quaternary ammonium compound. The reaction proceeds with excellent yield. The resulting compounds are particularly useful for inhibiting formation of hydrates in hydrocarbon reservoirs and pipelines. Novel compositions of matter include sterically hindered quaternary ammonium compounds conforming to the formulas C27H58XNO2 and C29H63XNO2, wherein X is a halogen.Type: ApplicationFiled: July 13, 2006Publication date: January 17, 2008Applicant: Baker Hughes IncorporatedInventor: Gordon T. Rivers
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Patent number: 7306039Abstract: A thermal insulating packer fluid contains water and/or brine, a crosslinkable viscosifying polymer, a crosslinking agent and an optional set retarder. The composition is capable of inhibiting unwanted heat loss from production tubing or uncontrolled heat transfer to outer annuli. The viscosity of the composition is such as to reduce the convection flow velocity within the annulus.Type: GrantFiled: August 13, 2003Date of Patent: December 11, 2007Assignee: BJ Services CompanyInventors: Xiaolan Wang, Paul H. Javora
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Publication number: 20070281866Abstract: A method is provided for inhibiting scale in a liquid hydrocarbon system, including the steps of: providing a liquid hydrocarbon system; providing an aloe-derived scale inhibitor; and mixing the aloe-derived scale inhibitor with the liquid hydrocarbon system in amounts effective to inhibit formation of scale. The scale inhibitor is aloe gel dissolved in water at a concentration of between about 5 and about 50% wt/wt, which includes polysaccharides having a hydrocarbon chain structure having carboxyl and alcohol functional groups that interact with divalent ions.Type: ApplicationFiled: May 30, 2006Publication date: December 6, 2007Applicant: Intevep, S.A.Inventors: Alfredo Viloria, Luis Castillo, Jose A. Garcia, Jose Biomorgi
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Publication number: 20070251693Abstract: A composition is provided for delivering an organic solvent to a downhole portion of a wellbore for the production of hydrocarbon or to a portion of a pipeline for the transmission of hydrocarbon. The composition comprises: (A) water; (B) a weighting agent; (C) an organic solvent that is immiscible with water; and (D) a surfactant adapted for forming an oil-external emulsion of the organic solvent and the water, wherein the surfactant is unstable to hydrolysis. The composition is formed to be an oil-external emulsion. The density of the composition is formulated to be greater than that of pure water at standard temperature and pressure. A method is provided for delivering an organic solvent to a downhole portion of a wellbore for the production of hydrocarbon or to a portion of a pipeline for the transmission of hydrocarbon. The method comprises the steps of: (A) forming a composition according to the invention; and (B) introducing the composition into the wellbore or into the pipeline.Type: ApplicationFiled: April 18, 2007Publication date: November 1, 2007Inventors: Gary J. Cheramie, Richard W. Pauls
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Patent number: 7205262Abstract: Water soluble nonionic friction reducers and added to coacervate gels having excellent shear viscosities and other properties. A preferred gel comprises poly diallyl dimethyl ammonium chloride, a lesser amount of sodium lauryl sulfonate, and lauryl alcohol. Excellent friction reducing properties are manifested; a particularly practical use for the compositions is in subterranean formation fracturing.Type: GrantFiled: December 10, 2002Date of Patent: April 17, 2007Assignee: Weatherford/Lamb, Inc.Inventors: Kevin N Schwartz, Kevin W. Smith
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Patent number: 7183239Abstract: Coacervate gels having excellent shear viscosities and other properties are made with anionic or cationic polymers, a smaller amount of a surfactant having a charge opposite that of the polymer, and a hydrophobic alcohol. The Zeta Potential of the gel is maintained at an absolute value of at least 20. Optional gel promoting additives include betaines and amine oxides. A preferred gel comprises poly diallyl dimethyl ammonium chloride, a lesser amount of sodium lauryl sulfonate, and lauryl alcohol. The gels are particularly useful forming plugs and pigs for separating fluids in pipes.Type: GrantFiled: December 11, 2002Date of Patent: February 27, 2007Assignee: Clearwater International, LLCInventors: Kevin W. Smith, Kevin M. Schwartz
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Patent number: 7164051Abstract: A method for inhibiting formation of hydrocarbon hydrates in mixtures of water and a hydrate-forming guest molecule involves adding a reaction product to the mixtures in an effective amount to inhibit formation of the hydrocarbon hydrates under conditions otherwise effective to form the hydrocarbon hydrates in the absence of the reaction product. The product is made by the reaction of first reactant that is an amine or polyamine, or alcohol or polyalcohol, with a second, aldehyde reactant and a third reactant that is an alcohol or polyalcohol or, an amide or polyamide. Preferably, if the first and third reactants are both an alcohol or both a polyalcohol, they are not the same. A non-limiting example of a suitable amine would be a fatty alkyl amine, while formaldehyde would be a non-limiting of a suitable aldehyde and polyacrylamide would be a suitable third reactant.Type: GrantFiled: August 29, 2003Date of Patent: January 16, 2007Assignee: Baker Hughes IncorporatedInventors: Gordon T. Rivers, Daniel L. Crosby
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Patent number: 7067459Abstract: A well service fluid composition comprises a fracturing fluid and a gas hydrate inhibitor. Preferably, the gas hydrate inhibitor does not affect the function of the fracturing fluid and is present in an amount sufficient to control and/or minimize the formation of gas hydrates. The well service fluid composition is useful in hydraulic fracturing in which the composition is injected into a subterranean formation under sufficient pressure to initiate and propagate a fracture in the formation. The fracturing fluid may be subsequently recovered when the fracturing operation is completed.Type: GrantFiled: June 28, 2004Date of Patent: June 27, 2006Assignee: BJ Services CompanyInventors: Marek K Pakulski, Jeffrey C. Dawson
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Patent number: 6905605Abstract: A method for inhibiting hydrate formation in a hydrocarbon flow by adding an amount of a dendrimeric compound effective to inhibit formation of hydrates at conduit temperatures and pressures, and flowing the mixture containing the dendrimeric compound and any hydrates through the conduit. Preferably, a hyperbranched polyester amide is used as hydrate formation inhibitor compound.Type: GrantFiled: April 6, 2001Date of Patent: June 14, 2005Assignee: Shell Oil CompanyInventor: Ulfert Cornelis Klomp
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Patent number: 6903054Abstract: A method of treating a hydrocarbon-containing formation is disclosed. The method includes injecting a well treating fluid into a well, wherein the well treating fluid includes a self-diverting acid that includes about 1% to 30% by weight of at least one acid selected from the group consisting of hydrochloric acid, sulfuric acid, phosphoric acid, formic acid, acetic acid, citric acid, maleic acid, hydrofluoric acid and mixtures thereof; and about 1% to 20% by volume of at least one viscoelastic surfactant selected from a family of compounds described by where R3 contains at least 10 carbon atoms, p=1-6, R2 contains 1-6 carbon atoms and R1 contains 1-6 carbon atoms; and about 0.7% to 20% by weight scale inhibitor.Type: GrantFiled: August 30, 2002Date of Patent: June 7, 2005Assignee: Schlumberger Technology CorporationInventors: Diankui Fu, Marieliz Garcia-Lopez de Victoria
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Patent number: 6894007Abstract: The invention relates to the use of compounds of the formula (1) in which R1 is C1- to C24-alkyl, C2- to C24-alkenyl or a C6- to C18-aryl radical which may be substituted by a C1- to C24-alkyl group, R2, R3 independently of one another, are hydrogen, C1- to C18-alkyl, or C8- to C7-cycloalkyl, or R2 and R3, including the nitrogen atom to which they are bonded, form a ring of 4 to 8 ring atoms, in which oxygen or nitrogen atoms may also be present in addition to carbon. A are identical or different C2- to C4-alkylene radicals, B is C1- to C7-alkylene, and n is an integer from 1-40, as gas hydrate inhibitors.Type: GrantFiled: March 20, 2002Date of Patent: May 17, 2005Assignee: Clariant GmbHInventors: Peter Klug, Uwe Dahlmann, Michael Feustel
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Patent number: 6867262Abstract: Graft polymers are used as gas hydrate inhibitors.Type: GrantFiled: July 11, 2000Date of Patent: March 15, 2005Assignee: BASF AktiengesellschaftInventors: Maximilian Angel, Karin Neubecker, Axel Sanner
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Patent number: 6764980Abstract: An oil field production chemical, especially a scale inhibitor, is in the form of particles thereof carrying a coating e.g. of a dispersing agent. The coating may be polymeric such as an oligomeric polyacid polyester, a polymeric alkoxylated alcohol or a fatty acid polyamine condensate or it may also be a surfactant and may be used in the form of a suspension in an inert oil, such as diesel oil or kerosene which may be injected into a subterranean formation to inhibit the formation of deposits, e.g. scale in oil wells over a longer period than compounds free of the coating.Type: GrantFiled: March 7, 2002Date of Patent: July 20, 2004Assignee: BP Exploration Operating Company LimitedInventors: Christopher Ian Bates, Ian Ralph Collins, Paul Derek Ravenscroft
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Patent number: 6723683Abstract: The present invention relates to biodegradable chemical compositions wherein core substrates, particularly oil well chemicals, are adsorbed onto particulate starch, particularly granular starch, providing a stable, controlled release formulation suitable for use in oil field applications. The invention further relates to the process of preparing obtaining these compositions.Type: GrantFiled: August 7, 2001Date of Patent: April 20, 2004Assignee: National Starch and Chemical Investment Holding CorporationInventors: Martin C. Crossman, James A. Rosie, Daniel B Solarek
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Patent number: 6720291Abstract: Improved mud additive compositions are provided which are especially formulated to control hole enlargement due to salt bed erosion during drilling, and to assist in solubilization of deposited salt during well operations. The compositions include a first ingredient such as sodium or potassium ferrocyanide and mixtures thereof, and a second ingredient such as the a phosphonic acid, alkali or alkaline earth metal phosphonic acid salts, or mixtures thereof. The first ingredient is generally present at a level of from about 50-95% by weight in the particulate, dilutable form of the invention, whereas the second ingredient is present at a level of from about 5-50% by weight. The compositions hereof may be added to drilling mud during drilling operations or to fresh water for removing salt depositions.Type: GrantFiled: August 23, 2001Date of Patent: April 13, 2004Assignee: Jacam Chemicals, L.L.C.Inventors: Gene H. Zaid, Beth Ann Wolf
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Patent number: 6706668Abstract: 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 solution, an electron donor agent, a primary electron transfer agent and a secondary electron transfer agent. The primary electron transfer agent is a source of rhenium ions. The secondary electron transfer agent is a source of iodide ion or iodine. The electron donor agent and primary and secondary electron transfer agents function together to reduce ferric ion present in the mineral acid solution to ferrous ion which in turn prevents ferric hydroxide and/or free sulfur from precipitating out of the solution and reduces the formation of sludge in crude oil in the formation. The particular electron transfer agents used in connection with the invention function with virtually all known electron donor agents.Type: GrantFiled: May 3, 2002Date of Patent: March 16, 2004Assignee: Halliburton Energy Services, Inc.Inventor: Michael M. Brezinski
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Patent number: 6702022Abstract: An oil well capsule to reduce the paraffin and asphaltene which accumulate on the walls of the pipes which are used to bring the oil up from underground deposits, and a method of using the oil well capsule. An oil well capsule having a shell encapsulating a chemically active mass wherein the chemically active mass consists essentially of alkaline or alkaline earth metal.Type: GrantFiled: June 20, 2001Date of Patent: March 9, 2004Inventors: Gennady V. Kattsyn, Boris E. Kogai
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Patent number: 6630428Abstract: The use of high flash point, low vapor pressure compositions for injection into, and coating of, gas and oil wells and surrounding underground hydrocarbon bearing formations and processing equipment for the purpose of removing scale, paraffins, tars, and other viscous constituents. Treatment results in increased flow of gas and/or oil and decreased adhesion of soil and scale in all aspects of oil and gas recovery, including hydrocarbon bearing formations, casings, lines and pumping equipment. The composition contains about 40 to 99 wt. % of a fatty acid alkyl ester blend and about 1 to 25 wt. % of at least one lower alkyl glycol ether.Type: GrantFiled: September 28, 2000Date of Patent: October 7, 2003Assignee: United Energy CorporationInventors: Harvey A. Furman, Kenneth R. Cioletti
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Patent number: 6620338Abstract: Novel corrosion inhibiting compositions comprising a combination of amino thiol or amino disulfide compounds with acidic amino acid polymers inhibit carbon dioxide induced corrosion of ferrous metals in aqueous systems. Particularly effective inhibitor compositions are the natural amino acids cysteine and cystine and their decarboxylated analogues cysteamine and cystamine in combination with polyaspartic acid. The inhibitor compositions are particularly useful for preventing corrosion and scale formation in oil production applications.Type: GrantFiled: September 9, 2002Date of Patent: September 16, 2003Assignee: Donlar CorporationInventors: Joseph C. Fan, Lai-Duien Grace Fan, Jacob Mazo
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Patent number: 6566309Abstract: The invention relates to the use of compounds of the formula (1) in which R1 is C1-C30-alkyl, C2-C30-alkenyl or a group of the formula —CH2—CO—NR2R3 or a C6-C18-aryl radical which may be substituted by a C1-C12-alkyl group, R2, R3 independently of one another, are hydrogen, C1-C6-alkyl or C5-C7-cycloalkyl, or R2 and R3, including the nitrogen atom to which they are bonded, form a ring of 4 to 8 ring atoms, it being possible for the ring also to contain oxygen or nitrogen atoms in addition to carbon atoms, A is a C2-C4-alkylene radical and n is an integer from 1 to 20, as gas hydrate inhibitors.Type: GrantFiled: May 2, 2000Date of Patent: May 20, 2003Assignee: Clariant GmbHInventors: Peter Klug, Michael Feustel
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Patent number: 6544932Abstract: An additive for inhibiting the formation of gas hydrates in connection with hydrocarbon production and transportation comprising the water-soluble polymers comprising structural elements of the formula wherein each R is independently H or C1-C5-alkyl; X is H, an alkaline or earth alkaline metal or a quaternary ammonium group; R1 is H or C1-C18-alkyl; and R2 is C1-C18-alkyl; and wherein the alkyl groups represented by R1 and R2 optionally carry a hydroxy or amino substituent; and, optionally, a minor proportion of structural elements of the formula wherein R, R1, R2 and X may have the meaning as above, and Alk is a C1-C5-alkylene chain.Type: GrantFiled: July 20, 2001Date of Patent: April 8, 2003Assignees: Clariant GmbH, RF-Rogaland ResearchInventors: Peter Klug, Malcolm Kelland