Organic Material Containing Additive (e.g., Carbohydrate, Bituminous Material, Etc.) Patents (Class 106/823)
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Publication number: 20070227728Abstract: The present invention provides a method and composition for sealing pipe in wellbores. The composition includes cement, water, gel and laminate particles. The laminate particles are added in a proportion to the cement to provide a weight to the slurry of between 12.5-14.5 pounds per gallon. The cement slurry is pumped down through pipe, such as casing, into the annulus and back up towards the surface. The cement slurry can extend from the producing formation to a location above the producing formation to form a seal. By utilizing the light weight cement slurry, the pipe such as casing can be sealed in a single stage operation.Type: ApplicationFiled: March 28, 2007Publication date: October 4, 2007Inventor: Don E. Chambers
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Patent number: 7261771Abstract: A process for increasing the viscosity of an aqueous cementitious mixture during its working state by mixing oppositely-charge polyelectrolytes into the cementitious mixture.Type: GrantFiled: January 9, 2002Date of Patent: August 28, 2007Assignee: nanoStrata Inc.Inventor: Joseph B. Schlenoff
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Patent number: 7261772Abstract: A gypsum composition comprising water, stucco, clay, an amine compound, a polyoxyalkylene, and a comb-branched copolymer is disclosed. The gypsum composition has improved fluidity. A method for preparing the gypsum composition is also disclosed. The method comprises mixing the components to form a slurry, casting the slurry into a product, and drying the product.Type: GrantFiled: October 17, 2006Date of Patent: August 28, 2007Assignee: Lyondell Chemical Technology, L.P.Inventors: Steven A. Schwartz, Sallie J. Lee, Frank J. Liotta, Jr., Robert M. Arrell
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Patent number: 7258738Abstract: Disulfonate salts of 2,4-pentanedione and methods for making such salts are described. The disulfonate salts are useful as cement dispersants. Cement compositions including such salts, methods for making cement compositions including such salts, and methods for performing cementing operations using such cement compositions are also described.Type: GrantFiled: August 5, 2005Date of Patent: August 21, 2007Assignee: Halliburton Energy Services, Inc.Inventors: Samuel J. Lewis, Michael J. Szymanski
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Patent number: 7255738Abstract: A lightweight cementitious composite material includes expanded synthetic polymer particulate having a particle size of between 0.0625 and 0.5 inches. A dispersant coating on said particulate suppresses electrostatic attraction between particulate particles. A matrix surrounds the particulate and is present from 0.25 to 1 pound per gallon of dispersant coated particulate.Type: GrantFiled: October 29, 2004Date of Patent: August 14, 2007Assignee: Conservation Roofing Systems, Inc.Inventor: Blaine K. Semmens
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Patent number: 7244303Abstract: Cement compositions, that comprise water, a cement, a strength-retrogression additive, and an acid, wherein the acid comprises ethylenediamine tetra acetic acid, nitrilotriacetic acid, or a combination thereof, are provided. Methods of cementing in a subterranean formation, methods of retarding the set time of a cement composition, and set retarder compositions also are provided.Type: GrantFiled: December 7, 2005Date of Patent: July 17, 2007Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, James F. Heathman, Dennis W. Gray, Bryan K. Waugh
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Patent number: 7244304Abstract: A method for producing a set gypsum-containing product comprising an interlocking matrix of set gypsum wherein said method comprises applying to said set gypsum one or more enhancing materials selected from the group consisting of phosphoric acid; condensed phosphoric acids, each of which comprises 2 or more phosphoric acid units; and salts or ions of condensed phosphates, each of which comprises 2 or more phosphate units, and monobasic salts or monovalent ions of orthophosphates.Type: GrantFiled: August 18, 2004Date of Patent: July 17, 2007Assignee: United States Gypsum CompanyInventors: Qiang Yu, Steven W Sucech, Brent E. Groza, Raymond J. Mlinac, Frederick T. Jones, Paul J. Henkels
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Patent number: 7241338Abstract: Sprayable fiber reinforced hydraulically setting mortars exhibit strain hardening behavior, and comprise hydraulically setting cement, less than 4 weight percent matrix interactive fibers, a non-Newtonian additive, a superplasticizer, optionally a viscosity control agent, aggregate, and further additives. The ductile composites can be prepared by spraying in thicknesses higher than conventional sprayable mortars.Type: GrantFiled: September 30, 2003Date of Patent: July 10, 2007Assignee: The Regents of the University of MichiganInventors: Victor C. Li, Yun Yong Kim, Hyunjoon Kong
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Patent number: 7232483Abstract: Exemplary compositions and methods for reducing hexavalent chromium in cementitious compositions involve the use of a liquid additive composition, comprising stannous chloride. Along with the stannous chloride may be used at least one co-additive comprising an antioxidant, oxygen scavenger, or mixture thereof, and/or at least one agent comprising a cement grinding aid, cement quality improver, or mixture thereof.Type: GrantFiled: March 24, 2006Date of Patent: June 19, 2007Assignee: W. R. Grace & Co.-Conn.Inventors: Leslie A. Jardine, Charles R. Cornman, Vijay Gupta, Byong-Wa Chun
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Patent number: 7232873Abstract: A polycarboxylic acid cement dispersant that can exhibit high dispersing ability and allow deforming in early stages in the case of producing concrete products, whereby the turnover of a formwork is increased so as to improve productivity, and the method of producing such as concrete product are provided. The polycarboxylic acid cement dispersant which provides a cement composition having a penetration resistance value exponent of 55 MPa or more and a slump retention exponent of 80% or more, and the method of producing a concrete product which makes use of a copolymer derived by using monomer components comprising the monomer (A) as polyalkylene glycol unsaturated monomer, the monomer (B) as unsaturated carboxylic monomer, and the monomer (C) as sulfonic acid group-containing monomer.Type: GrantFiled: April 9, 2004Date of Patent: June 19, 2007Assignee: Nippon Shokubai Co., Ltd.Inventors: Takashi Tomita, Hirokatsu Kawakami, Hiroko Okochi
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Patent number: 7198669Abstract: An accelerator composition for use with sprayed cementitious compositions, which is an aqueous solution or dispersion of a blend of the essential Components 1–3 Component 1—aluminium sulphate Component 2—at least one of an alkanolamine and an alkylene diamine or triamine Component 3—hydrofluoric acid optionally with at least one of Components 4–7, with the proviso that at least one of Component 4 or Component 5 be present: Component 4—at least one of sodium hydroxide, potassium hydroxide, lithium hydroxide, magnesium hydroxide, lithium carbonate, sodium carbonate, potassium carbonate, magnesium carbonate, sodium sulphate, potassium sulphate, magnesium sulphate and lithium sulphate; Component 5—C1–C10 aliphatic mono- and dicarboxylic acids and their metal salts; Component 6—aluminium hydroxide; Component 7—at least one of phosphoric acid and phosphorous acid. The accelerators have excellent long-term stability and work well with “difficult” cements, such as some Japanese OPCs.Type: GrantFiled: May 22, 2003Date of Patent: April 3, 2007Assignee: Construction Research & Technology GmbHInventors: Terje Angelskaar, Raita Iwata
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Patent number: 7182808Abstract: An accelerator composition for use with sprayed cementitious compositions, which is an aqueous solution or dispersion of a blend of the essential Components 1–3 Component 1—aluminium sulphate Component 2—at least one of an alkanolamine and an alkylene diamine or triamine Component 3—hydrofluoric acid optionally with at least one of Components 4–7, with the proviso that at least one of Component 4 or Component 5 be present: Component 4—at least one of sodium hydroxide, potassium hydroxide, lithium hydroxide, magnesium hydroxide, lithium carbonate, sodium carbonate, potassium carbonate, magnesium carbonate, sodium sulphate, potassium sulphate, magnesium sulphate and lithium sulphate; Component 5—C1–C10 aliphatic mono- and dicarboxylic acids and their metal salts; Component 6—aluminium hydroxide; Component 7—at least one of phosphoric acid and phosphorous acid. The accelerators have excellent long-term stability and work well with “difficult” cements, such as some Japanese OPCs.Type: GrantFiled: February 19, 2004Date of Patent: February 27, 2007Assignee: Construction Research & Technology GmbHInventors: Terje Angelskaar, Raita Iwata
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Patent number: 7172022Abstract: The present invention provides cement compositions that include degradable materials, and methods of using such compositions in subterranean cementing operations. An example of a method of the present invention includes: providing a cement composition that includes a hydraulic cement, and a degradable material; placing the cement composition in a subterranean formation; allowing the cement composition to set therein; and allowing the degradable material to degrade. Another example of a method of the present invention is a method of enhancing the mechanical properties of a cement composition including adding a degradable material to the cement composition and allowing the degradable material to degrade.Type: GrantFiled: March 17, 2004Date of Patent: February 6, 2007Assignee: Halliburton Energy Services, Inc.Inventors: B. Raghava Reddy, Frank Zamora, Philip D. Nguyen, Trinidad Munoz, Jr., Anthony V. Palmer
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Patent number: 7166159Abstract: A cement composition for liquid casting, based on a binder comprising Portland cement and additives comprising at least a fluidizer and a combination of a thickening agent acting by steric exclusion and a gelling thickening agent. The composition can also include a surface active agent to regulate the quantity of entrained air. Mixed with water and an aggregate, it permits obtaining, in a single casting, a self-leveling casting of a high thickness (equal to at least 6 cm) and of low density (about 1.6 to 1.9).Type: GrantFiled: August 10, 2004Date of Patent: January 23, 2007Assignee: Ciments FrancaisInventors: Pierre Colombet, Jean Ambroise, Jean-Pierre Grelaud, Michel Pasquier
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Patent number: 7160384Abstract: An exemplary method of the invention comprises introducing into a grinding mill, wherein cement clinker is ground to provide cement powder, a diamine such as tetrahydroxylethylethylene diamine, and an alkanolamine such as triethanolamine or triisopropanolamine. The combination of the diamine and alkanolamine provides superior grinding efficiency compared to diamine or alkanolamine added separately.Type: GrantFiled: October 2, 2003Date of Patent: January 9, 2007Assignee: W.R. Grace & Co.-Conn.Inventor: Leslie A. Jardine
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Patent number: 7150322Abstract: Cement compositions including environmentally compatible defoamers and methods of using such cement compositions are provided herein. An example of a method is a method of cementing in a subterranean formation. Another example of a method is a method of reducing foam generation in a cement composition. An example of a composition is a cement composition including water, hydraulic cement, and a defoamer. Another example of a composition is a defoamer.Type: GrantFiled: August 24, 2004Date of Patent: December 19, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Michael J. Szymanski, Samuel J. Lewis, J. Michael Wilson, Arron L. Karcher
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Patent number: 7147706Abstract: Cementitious compositions having high compressive strength and high flexibility. An efficient method of making such strong cementitious compositions entails pre-mixing cement additives that can easily be added to a mixture of cement, silica, fibers and water. The cementitious compositions can be used to make strong, thin layers, such as tiles, that are relatively lightweight, as well as heavy structures, such as roads and bridges, without additional reinforcement.Type: GrantFiled: August 29, 2002Date of Patent: December 12, 2006Assignee: Carpentercrete, LLCInventor: Matthew R. Piazza
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Patent number: 7147705Abstract: Methods, cement compositions and oil suspensions of powders selected from the group consisting of micro-silica, silica flour, fine silica flour, silica sand, fine particle size cement, ultra-fine particle size cement, fly ash, slag, vitrified shale and zeolite.Type: GrantFiled: October 5, 2005Date of Patent: December 12, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, Ronney R. Koch, Bobby J. King
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Patent number: 7147708Abstract: The present invention relates to a thickened aqueous solution, or gel solution, for use in providing fiber to a cement composition. Additionally, the present invention relates to a method for adding fibers to cement.Type: GrantFiled: October 28, 2004Date of Patent: December 12, 2006Assignee: Solomon Colors, Inc.Inventors: Richard W. Nagler, Jr., Charles Kreulzer
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Patent number: 7138012Abstract: Use of waste generated as a byproduct of a first manufacturing process as an air entraining admixture (AEA) in a second product. In some instances, the waste materials can be used as an AEA during cement and/or concrete formation, and may also be waste materials produced during shampoo manufacturing. It is contemplated that the use of non-conventional materials as an AEA conventional applications will often result in products that have performance characteristics similar to conventional AEAs.Type: GrantFiled: September 9, 2002Date of Patent: November 21, 2006Assignee: Waste Markets CorporationInventors: David Long, M. D. Poole
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Patent number: 7128782Abstract: A chromium VI reducing composition comprising particles of solid material selected from the group consisting of iron (II) sulfate and tin sulfate, the particles being substantially uniformly dispersed within a liquid carrier. Methods for modifying hydratable cementitious materials using the chromium reducing composition are also disclosed and provide advantages over dry powder or dissolved forms of sulfate compositions when used in cement manufacturing.Type: GrantFiled: July 13, 2004Date of Patent: October 31, 2006Assignee: W.R. Grace & Co.-Conn.Inventors: Leslie A. Jardine, Charles R. Cornman, David T. Geary, Vijay Gupta, Byong-Wa Chun
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Patent number: 7128780Abstract: A process for producing building materials, such as asphalt, cement, concrete, mortar, or plaster board from liquid paint sludge containing water and paint solids produced from overspray in commercial paint booth operations. The preferred embodiment comprises adding the liquid paint sludge as the hydrating agent directly to the building material mix.Type: GrantFiled: October 3, 2002Date of Patent: October 31, 2006Assignee: E. I. du Pont de Nemours and CompanyInventors: Robert R. Matheson, Dennis M. Dixon, John R. Moore, David A. Fischer
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Patent number: 7128781Abstract: Cementitious compositions having high compressive strength and high flexibility. An efficient method of making such strong cementitious compositions entails pre-mixing cement additives that can easily be added to a mixture of cement, silica, fibers and water. The cementitious compositions can be used to make strong, thin layers, such as tiles, that are relatively lightweight, as well as heavy structures, such as roads and bridges, without additional reinforcement.Type: GrantFiled: August 29, 2002Date of Patent: October 31, 2006Assignee: Carpentercrete, LLCInventor: Matthew R. Piazza
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Patent number: 7087110Abstract: Exemplary compositions and methods for reducing hexavalent chromium in cementitious compositions involve the use of a liquid additive composition, comprising stannous chloride. Along with the stannous chloride may be used at least one co-additive comprising an antioxidant, oxygen scavenger, or mixture thereof, and/or at least one agent comprising a cement grinding aid, cement quality improver, or mixture thereof.Type: GrantFiled: February 1, 2005Date of Patent: August 8, 2006Assignee: W. R. Grace & Co.-Conn.Inventors: Leslie A. Jardine, Charles R. Cornman, Vijay Gupta, Byong-Wa Chun
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Patent number: 7083703Abstract: A filler comprising cellulose or lignocellulose fibrils on which light-scattering material particles have been deposited, and a process for the manufacture thereof. In the filler according to the invention, an alkyl derivative of cellulose, such as CMC, has been sorbed to the fibrils. Such a filler can be prepared from a source material containing cellulose or lignocellulose fibrils by first forming a fibril suspension, into which there are fed source materials forming an inorganic or organic salt that, when precipitating, forms a light-scattering pigment. The filler according to the invention has very good strength properties; in particular, good bond strength is achieved by means of it. The concentration of mineral pigment in paper can be increased and, furthermore, the grammage of paper can be lowered without the other important properties of the paper deteriorating.Type: GrantFiled: April 24, 2002Date of Patent: August 1, 2006Assignee: M-real OyjInventors: Outi Aho, Petri Silenius, Maija Pitkänen, Soili Hietanen
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Patent number: 7067000Abstract: A method of cementing, comprising displacing a cement composition into a workspace, wherein the cement composition comprises cement, water, and a fluid loss control additive comprising a polymer and a sugar connected by a pH-sensitive crosslink, and allowing the cement composition to set. A method for reducing fluid loss from a cement composition, comprising providing a cement and a fluid loss control additive, wherein the fluid loss control additive comprises a polymer and a sugar connected by a pH-sensitive crosslink, and mixing the cement, fluid loss control additive, and water to form the cement composition.Type: GrantFiled: February 22, 2005Date of Patent: June 27, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Michael J. Szymanski, Samuel J. Lewis, Michael J. R. Segura
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Patent number: 7067003Abstract: A cementitious mixture for concrete including an admixture including dunder having a solids content in a range of from 5% to substantially 100% by weight, the dunder being added to the cement in a range of from 0.1% to 5% by weight of cement in a concentration which results in the initial setting time being less than thirty-six hours.Type: GrantFiled: May 14, 2003Date of Patent: June 27, 2006Assignee: Olmway Pty LtdInventor: David Patrick Cooney
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Patent number: 7060129Abstract: The present invention provides a cement composition and a process for using the cement composition to inhibit gas migration from a subterranean zone into the cement. The process comprises displacing a gelling additive, preferably comprised within a cement composition, into a well bore such that the gelling additive passes into the subterranean zone, and allowing the gelling additive to form a crosslinked gel in the subterranean zone to inhibit gas migration from the subterranean zone. The crosslinked gel acts as a barrier to gas in the subterranean zone and thereby inhibits the gas from passing into the cement and forming flow channels therein before the cement can set.Type: GrantFiled: January 14, 2005Date of Patent: June 13, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Bach Dao, Ewout Biezen, Jan Pieter Vijn, Thien Pham
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Patent number: 7037369Abstract: An alkali-free accelerator for use with spray-applied cementitious compositions such as concrete and mortar is the reaction product in aqueous medium of amorphous aluminium hydroxide, aluminium sulphate, formic acid and phosphoric acid. These accelerators perform as well as known alkali-free accelerators and are exceptionally stable, even in hot conditions.Type: GrantFiled: August 26, 2002Date of Patent: May 2, 2006Assignee: Construction Research & Technology GmbHInventor: Terje Angelskaar
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Patent number: 7037367Abstract: Surface retarder compositions of the invention comprise at least one surface retarder active suspended in a vegatable oil or derivative thereof, an animal oil or derivative thereof, or mixtures thereof. Methods involving use of the compositions are also described.Type: GrantFiled: October 20, 2003Date of Patent: May 2, 2006Assignee: W.R. Grace & Co.-Conn.Inventors: John Mauchamp, Philippe Antoine, Dany Vincent, Kati Hazrati
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Patent number: 7036586Abstract: The present invention relates to subterranean cementing operations, and more particularly, to methods of cementing in subterranean formations using cement compositions that autogenously cure voids that may form in such cement compositions. In one embodiment, the present invention provides a method of cementing in a subterranean formation penetrated by a well bore comprising the steps of: placing a cement composition into the well bore, wherein the cement composition comprises a first cementitious component having a first set time and a second cementitious component having a second set time that is delayed relative to the first set time of the first cementitious component; allowing the first cementitious component to at least partially set; and allowing the second cementitious component to set after a delay period.Type: GrantFiled: January 30, 2004Date of Patent: May 2, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Craig W. Roddy, Bradley L. Todd
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Patent number: 7032663Abstract: This invention relates to improved methods for completing wells in unconsolidated subterranean zones. More specifically, the present invention relates to cement compositions useful in subterranean applications, and more particularly, to permeable cement compositions and methods for forming consolidated permeable cement masses in well bores to prevent sand influx into the well bores with produced fluids. In one embodiment, the permeable cement compositions of the present invention comprise a hydraulic cement, water, and a degradable material capable of undergoing an irreversible degradation downhole.Type: GrantFiled: June 27, 2003Date of Patent: April 25, 2006Assignee: Halliburton Energy Services, Inc.Inventor: Philip D. Nguyen
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Patent number: 7008479Abstract: Methods of cementing in subterranean zones, improved cement compositions and improved additives are provided. The compositions are basically comprised of a hydraulic cement, sufficient water to form a slurry and an additive for providing improved rheology, fluid loss control and set retardation comprised of carboxymethylhydroxyethylcellulose having in the range of from about 0.62 to about 2.21 moles of hydroxyethyl substitution and in the range of from about 0.44 to about 0.52 degrees of carboxymethyl substitution and a 2% by weight aqueous solution of the carboxymethylhydroxyethylcellulose has a Höppler viscosity in the range of from about 55 mPa.s to about 359 mPa.s.Type: GrantFiled: May 5, 2004Date of Patent: March 7, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, Roger S. Cromwell, Darrell C. Brenneis, Bobby J. King
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Patent number: 7004256Abstract: Cement compositions, that comprise water, a cement, a strength-retrogression additive, and an acid, wherein the acid comprises ethylenediamine tetra acetic acid, nitrilotriacetic acid, or a combination thereof, are provided. Methods of cementing in a subterranean formation, methods of retarding the set time of a cement composition, and set retarder compositions also are provided.Type: GrantFiled: October 11, 2004Date of Patent: February 28, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, James F. Heathman, Dennis W. Gray, Bryan K. Waugh
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Patent number: 6983800Abstract: Methods, cement compositions and oil suspensions of powders are provided. The oil suspensions of silica powder comprise silica powder, mineral oil, an oleophilic clay, an oleophilic surfactant and a hydrophilic surfactant.Type: GrantFiled: October 29, 2003Date of Patent: January 10, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, Ronney R. Koch, Bobby J. King
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Patent number: 6953090Abstract: Methods of cementing subterranean zones using cement compositions containing biogradable dispersants are provided. The methods are basically comprised of the steps of preparing a hydraulic cement, a biodegradable dispersant comprised of polyaspartic acid containing side chains formed by reacting one or more side chain chemicals with said polyaspartic acid and sufficient water to form a pumpable slurry, placing the cement composition into a zone to be cemented and allowing the cement composition to set into an impermeable solid mass therein.Type: GrantFiled: November 17, 2003Date of Patent: October 11, 2005Assignees: Halliburton Energy Services, Inc., Degussa Construction Polymers GmbHInventors: Jan Pieter Vijn, Christian E. Spindler, Gregor Keilhofer, Johann Plank
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Patent number: 6953505Abstract: The present invention relates to stable and biodegradable foamed cement slurries, additives and methods. A foamed cement slurry of the invention comprises a hydraulic cement, sufficient water to form a slurry, sufficient gas to form a foam and a biodegradable foaming and stabilizing additive comprising a mixture of a capryl/capramido propyl betaine surfactant and a capryl/capramido propyl dimethyl amine oxide surfactant.Type: GrantFiled: August 19, 2004Date of Patent: October 11, 2005Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, D. Chad Brenneis, Bobby J. King
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Patent number: 6951249Abstract: The present invention relates to foamed cement slurries, additives and methods. A foamed cement slurry of the invention comprises a hydraulic cement, sufficient water to form a slurry, sufficient gas to form a foam and an environmentally benign foaming and stabilizing additive comprising a mixture of an ammonium salt of an alkyl ether sulfate surfactant, a cocoamidopropyl hydroxysultaine surfactant, a cocoamidopropyl dimethylamine oxide surfactant, sodium chloride and water.Type: GrantFiled: July 26, 2004Date of Patent: October 4, 2005Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, Bobby J. King, Roger S. Cronwell, D. Chad Brenneis, Dennis W. Gray
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Patent number: 6942727Abstract: Reinforced high early-strength cementitious members are made from water and strength generating ingredients, which include a hydraulic cement, a polycarboxylate dispersant and structural synthetic fiber. The strength generating ingredients provide corrosion resistance by avoiding the use of steel reinforcing members, increased ductility and load bearing capacity while developing a high early-strength of at least about 1,400 pounds per square inch (psi) flexural strength and at least about 7,500 pounds per square inch (psi) compressive strength within about 24 hours after placing the cementitious composition in a mold.Type: GrantFiled: December 30, 2003Date of Patent: September 13, 2005Assignee: Construction Research & Technology GmbHInventors: Joseph A. Daczko, Mark A. Kurtz, Michelle Dulzer
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Patent number: 6939402Abstract: The present invention provides a cement admixture that comprises at least one of a carboxylic acid based copolymer comprising a reactive surfactant as a monomer or a copolymer salt obtained by neutralizing the copolymer with an alkaline substance, a method for preparing the same, and a cement composition comprising the same. The cement admixture of the present invention increases composition fluidity even at a high water-reducing formulation by improving dispersibility of cement particles, prevents a decrease of fluidity as the function of time, and offers good workability by supplying an adequate amount of air flow continuously.Type: GrantFiled: December 10, 2003Date of Patent: September 6, 2005Assignee: LG Chem, Ltd.Inventors: Byeong-Gil Choi, Dong-Kyu Kang, Kwang-Myung Park, Jong-Keun Song, Chan-Young Lee, Hee-Bong Song, Chang-Yeob Lee, Dong-Duck No, Dae-Joong Kim
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Patent number: 6939935Abstract: Anionic polymers obtainable by: (a) esterifying maleic acid or its anhydride with alkyl polyalkylene glycols; (b) copolymerizing the esters obtained with (meth)acrylic acid; and (c) converting the polymers obtained into the salt form by addition of alkali metal bases; are disclosed.Type: GrantFiled: December 4, 2002Date of Patent: September 6, 2005Assignee: Cognis Iberia S.L.Inventors: Ramon Valls, Jaim Tuduri, Rafael Pi Subirana
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Patent number: 6916369Abstract: Exemplary compositions comprise at least one aldopentonic acid, such as xylonic acid; and further comprise a lignin, a lignosulfonic acid or its salt, an additional sugar acid such as a aldohexonic acid or salt, a conventional admixture (such as a polyacrylate superplasticizer, a corrosion inhibitor, a set retard, a set accelerator, etc.), or a mixture thereof. Exemplary methods for obtaining microbiologically or enzymatically converted sugar acids are also described herein.Type: GrantFiled: March 10, 2003Date of Patent: July 12, 2005Assignee: W. R. Grace & Co.-Conn.Inventors: Byong-wa Chun, Benita Dair, Charlotte B. Porteneuve, Ara Avedis Jeknavorian, Josephine Ho-Wah Cheung, Lawrence R. Roberts
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Patent number: 6902002Abstract: The present invention relates to subterranean cementing operations and, more particularly, to cement composition that include improved lost circulation materials, and methods of using such cement compositions in subterranean formations. In certain exemplary embodiments, the improved lost circulation materials include inelastic particles of polyethylene, polystyrene and/or polypropylene. Optionally, the cement compositions also may include additives such as fly ash, a surfactant, a dispersant, a fluid loss control additive, a conventional lost circulation material, an generator, a retarder, a salt, a mica, fiber, a formation-conditioning agent, fumed silica, bentonite, expanding additives, microspheres, weighting materials, or a defoamer.Type: GrantFiled: March 17, 2004Date of Patent: June 7, 2005Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, Bobby J. King, Roger S. Cromwell, D. Chad Brenneis
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Patent number: 6893497Abstract: The invention concerns the use of water-soluble polysaccharide derivatives as dispersing agents for mineral binder suspensions. A partially hydrolyzed cellulose containing carboxyl groups and optionally hydroxyalkyl and/or sulfate groups and/or a partially hydrolyzed amylose-rich starch which also has sulfoalkyl groups with 1 to 4 carbon atoms is used as the polysaccharide derivative. These polysaccharide derivatives have a low viscosity and an excellent plasticizing effect in mineral binder suspensions, especially in those based on cement, lime and/or gypsum.Type: GrantFiled: March 21, 2002Date of Patent: May 17, 2005Assignee: Degussa Construction Chemicals GmbHInventors: Lars Einfeldt, Gerhard Albrecht, Alfred Kern, Matilde Calado Vieira, Dieter Klemm
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Patent number: 6893496Abstract: Blended cement compositions for mixture with aggregate and water to prepare cementitious products. Such blended cement compositions contain cement, calcined diatomaceous earth, calcined kaolin, fiberous material and reactive vinyl acetate co-polymers, with or without talc and/or bentonite or their functional equivalents. Admixtures for blending into cement to create such blended cements or their read-mix equivalents contain calcined kaolin, calcined diatomaceous earth, fiberous material and reactive vinyl acetate co-polymers, with or without talc and/or bentonite or their functional equivalents.Type: GrantFiled: December 16, 2002Date of Patent: May 17, 2005Assignee: Universal White Cement Company, Inc.Inventor: Vaughn R. Liljenquist
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Patent number: 6884509Abstract: An aggregate turf filler for use with the turf of athletic fields and landscaped areas which comprise crushed silica sand particles (SiO2) which are substantially round in shape and are sized to be between 12 and 40 mesh. An acrylic based sealer covering the outer surface of each of the silica sand particles. Finally, providing that the silica sand particles have a smooth outer surface, possess an angle of repose of less than 30°, repel water, resist compacting, present no damaging sharp edges when incorporated with the turf and are environmentally safe.Type: GrantFiled: April 24, 2003Date of Patent: April 26, 2005Assignee: U.S. Greentech, LLCInventors: Carl L. Huff, Randolph S. Reddick
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Patent number: 6875266Abstract: An additive for use in the preparation of lightweight concrete, said additive including a blend of from around 40% to 99% of organic polymeric material and from 1% to around 60% of an air entraining agent. The additive is particularly suitable for the preparation of lightweight concrete which uses polystyrene aggregate. It provides for excellent dispersion of the polystyrene aggregate and improved bond between the polystyrene aggregate and surrounding cementitious binder. The resultant lightweight concrete formulation may be pumped and is particularly suitable for sandwich wall construction.Type: GrantFiled: April 10, 2000Date of Patent: April 5, 2005Assignee: James Hardie Research Pty LimitedInventors: Basil Taha Naji, Ihor Himezak, David Malcolm Stitt
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Patent number: 6872247Abstract: Methods and compositions involving hexavalent chromate-reducing agents, particularly hydroxylamine, hydrazine, or their salts or derivatives, for use in cement compositions and cement processing.Type: GrantFiled: October 7, 2003Date of Patent: March 29, 2005Assignee: W. R. Grace & Co.-Conn.Inventors: Leslie A. Jardine, Charles A. Cornman, Felek Jachimowicz
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Patent number: 6869474Abstract: Extremely fast setting of cementitious compositions for producing cement-based products such as cement boards is made possible by adding an alkanolamine to a hydraulic cement such as portland cement, and forming a slurry with water under conditions that provide an initial slurry temperature of at least 90° F. Use of alkanolamine under conditions disclosed herein allows an extremely rapid setting of the cementitious composition. Additional reactive materials may be included such as high alumina cement, calcium sulfate and a pozzolanic material such as fly ash. The extremely fast rapid set permits rapid production of cementitious products.Type: GrantFiled: April 16, 2003Date of Patent: March 22, 2005Assignee: United States Gypsum CompanyInventors: Marianela Perez-Pena, Ashish Dubey
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Patent number: 6869476Abstract: Disclosed herein is a waterproof admixture composition for concrete which is added to fabricate concrete having excellent anti-corrosive performance. The waterproof admixture composition can protect reinforcing steel bars against oxidation in the presence of salt, thereby ensuring excellent anti-corrosive performance and thus greatly improving the durability of reinforced concrete even in salt-damaged areas and corrosive environments and the like by inhibiting the corrosion of the reinforced concrete. The waterproof admixture composition comprises fly ash and silica fume as artificial pozzolan activators, a redispersible powders resin, a higher fatty acid-based metal salt and a high performance water-reducing agent wherein the composition further comprises 18 to 34% by weight of an inorganic salt and 1 to 5% by weight of tannin as an antioxidant, based on the total weight of the composition.Type: GrantFiled: November 25, 2003Date of Patent: March 22, 2005Assignee: Jang San Waterproof Industrial Co., Ltd.Inventors: Do-Chul Shin, Won-Hwa Kim