Organic Sulfur Compound Patents (Class 106/725)
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Patent number: 7008477Abstract: 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: August 12, 2005Date of Patent: March 7, 2006Assignee: 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: 6989057Abstract: A method and cement composition is provided for sealing a subterranean zone penetrated by a well bore, wherein the cement composition comprises zeolite, cementitious material, and water sufficient to form a slurry.Type: GrantFiled: December 10, 2002Date of Patent: January 24, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Donald A. Getzlaf, Karen Luke, Keith A. Rispler, Russell M. Fitzgerald, Glen C. Fyten
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Patent number: 6982000Abstract: The present invention provides improved cement compositions comprising hydraulic cement, silica hydrophobicized with a mixture of organosilicon compounds and water.Type: GrantFiled: March 25, 2005Date of Patent: January 3, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, Roger S. Cromwell, Craig W. Roddy
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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: 6899177Abstract: Methods of cementing subterranean zones penetrated by well bores using cement compositions having enhanced compressive strengths are provided. A method of the invention basically comprises the steps of preparing or providing a cement composition having enhanced compressive strength upon setting comprising a hydraulic cement, sufficient water to form a slurry and a hydroxyamine compressive strength enhancing additive. Thereafter, the cement composition is placed in a subterranean zone to be cemented and allowed to set into an impermeable solid mass therein.Type: GrantFiled: October 10, 2003Date of Patent: May 31, 2005Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterj, Roger S. Cromwell, Bobby J. King, D. Chad Brenneis
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Patent number: 6863837Abstract: The present invention provides a sulfonated coal tar distillate salt polymer that is a condensation product of an aldehyde, preferably formaldehyde, and a sulfonated middle fraction obtained during coal tar distillation. The middle fraction includes from about 40% to about 95% by weight naphthalene and from about 5% to about 60% by weight of a plurality of compounds selected from the group consisting of quinoline, indene, biphenyl, indane, acenaphthene, anthracene, phenanthrene, methyl naphthalene, cresol, phenol, xylenol, and tetralin. The present invention also provides a method of forming a sulfonated coal tar distillate salt polymer.Type: GrantFiled: August 5, 2002Date of Patent: March 8, 2005Assignee: GEO Specialty Chemicals, Inc.Inventors: Arpad Savoly, Dawn P. Elko, Bennie Veal, Michelle L. McMahon, David B. Heller, Jr.
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Patent number: 6858074Abstract: A high early-strength cementitious composition comprising a hydraulic cement; and a combination admixture system wherein the combination admixture system comprises a polycarboxylate high range water reducing dispersant in combination with an accelerator and a retarder. The admixture allows for acceptable workability and development of high early-strength in cementitious compositions without the use of an external heat source.Type: GrantFiled: August 14, 2002Date of Patent: February 22, 2005Assignee: Construction Research & Technology GmbHInventors: James Edward Anderson, Joseph Andrew Daczko, John Joseph Luciano
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Patent number: 6855201Abstract: A cement composition is basically comprised of a hydraulic cement, water in an amount sufficient to form a pumpable slurry and a fluid loss control polymer additive comprised of 69 weight % of the calcium salt of 2-acrylamido-2-methyl propane sulfonic acid, 14 weight % of the calcium salt of maleic acid, 14 weight % of N-vinyl caprolactam and 3 weight % of 4-hydroxybutyl vinyl ether.Type: GrantFiled: November 14, 2003Date of Patent: February 15, 2005Assignee: Halliburton Energy Services, Inc.Inventors: Larry S. Eoff, Krista L. Keener
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Patent number: 6849117Abstract: 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: October 15, 2001Date of Patent: February 1, 2005Assignee: Ciments FrancaisInventors: Pierre Colombet, Jean Ambroise, Jean-Pierre Grelaud, Michel Pasquier
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Patent number: 6843846Abstract: Methods and compositions for cementing subterranean zones penetrated by well bores are provided. The methods are basically comprised of the steps of providing a cement composition which comprises a hydraulic cement, sufficient water to form a slurry and a dispersing agent comprising a tetrapolymer formed of methacrylic acid, methacrylate, methallyl sulfonic acid and ethoxylated acrylic acid. The cement composition is placed in the subterranean zone to be cemented and allowed to set into an impermeable solid mass therein.Type: GrantFiled: November 6, 2003Date of Patent: January 18, 2005Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, D. Chad Brenneis, Dennis W. Gray, Krista L. Keener
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Patent number: 6840319Abstract: Methods, compositions and fluid loss control additives for cementing in subterranean zones are disclosed. A composition comprises a hydraulic cement, sufficient water to from a slurry and a water soluble biodegradable fluid loss control additive comprising a mixture of a condensation product and hydroxyethylcellulose having a molar substitution in the range of from about 1 mole to about 2.5 moles of ethylene oxide.Type: GrantFiled: January 21, 2004Date of Patent: January 11, 2005Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, Roger S. Cromwell, Bobby J. King, D. Chad Brenneis
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Publication number: 20040261666Abstract: A low moisture composition for producing concrete articles exhibiting increased density and strength and requiring a short consolidation time is obtained by adding a powder admixture of naphthalene formaldehyde condensates to a cement composition.Type: ApplicationFiled: July 23, 2004Publication date: December 30, 2004Inventors: Semyon A. Shimanovich, Christian Meyer
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Publication number: 20040262001Abstract: The present invention relates to cementing operations, and more particularly, to cement compositions comprising set retarder compositions and methods of using the cement compositions in surface and subterranean applications. In some embodiments, the present invention provides cement compositions that comprise a hydraulic cement comprising an API cement, water, and a set retarder composition, the set retarder composition comprising an acrylamide polymer derivative; and an iron compound. In other embodiments, the present invention provides cement compositions, set retarder compositions, methods of cementing, methods of retarding the set time of a cement composition, and methods of preparing a cement composition.Type: ApplicationFiled: July 14, 2004Publication date: December 30, 2004Inventors: William J. Caveny, Rickey L. Morgan, Ronney R. Koch
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Patent number: 6835243Abstract: An improved method of cementing casing in a deep water offshore formation penetrated by a well bore comprising the steps of preparing a foamed cement composition comprised of calcium aluminate cement, a set accelerating additive, a thickening time increasing additive, water, a gas, and a mixture of foam forming and foam stabilizing surfactants; placing the cement composition in the annulus between the casing and well bore; and allowing the cement composition to set into a hard impermeable mass therein.Type: GrantFiled: May 14, 2001Date of Patent: December 28, 2004Assignee: Halliburton Energy Services, Inc.Inventors: Lance E. Brothers, Anthony V. Palmer
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Patent number: 6824605Abstract: An additive for elaboration of ecological permeable concretes. The additive containing from about 24.5% to 28.2% by weight of a mixture made of dispersing agents, from about 3.3% to 3.8% by weight of a humectant agent, from 0 to about 1% by weight of a nonionic surfactant, from 0 to about 3% by weight basis of a bactericidal agent, from about 3.3% to 3.8% by weight of hydroxypropylethyl or methylcellulose from 0 to about 0.3% by weight of an antifoaming agent and from about 55.8% to 64.2% by weight of a highly reactive non-crystalline calcinated silica aluminant.Type: GrantFiled: March 11, 2003Date of Patent: November 30, 2004Inventors: Nestor De Buen-Unna, Luis German Guevara-Nieto, Jaime Grau-Genesias
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Patent number: 6793730Abstract: The present invention provides improved methods for cementing. The methods are basically comprised of the steps of preparing a cement composition comprised of hydraulic cement, water, gas, surfactants, a cement early strength accelerator and a mildly set retarding cement dispersing agent, placing the cement composition in the annulus between the casing string and the well bore and allowing the cement composition to set into a hard impermeable mass. The cement composition used can alternatively comprise hydraulic cement, a water reducing additive, a dispersing additive, a set accelerating additive and water. Also, the cement composition can be made environmentally benign by using water reducing and dispersing additives, set retarding additives, and compressive strength and set accelerating additives which are environmentally degradable.Type: GrantFiled: June 4, 2003Date of Patent: September 21, 2004Assignee: Halliburton Energy Services, Inc.Inventors: B. Raghava Reddy, Ronald J. Crook, Russell M. Fitzgerald, Bryan K. Waugh
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Patent number: 6780237Abstract: A settable composition suitable for coating surfaces; e.g., walls of a mine comprises (i) a cementitious composition comprising the following components: (a) at least 25% preferably at least 40% of a reactive cement having a C to A or (A+X) ratio of greater than 1:1 preferably greater than 1.2:1, where X is S* or S or F (b) from 0 to 10% of lime and (c) from 5 to 70% preferably 10 to 40% of calcium sulphate, and where the sum of (b) and (c) is at least 15% the % being by weight based on the combined weight of (a), (b) and (c) and where the proportions of the components are such that the composition on hydration is capable of absorbing at least its own weight of water and (ii) an aqueous emulsion of an organic polymer, the amount of (ii) in relation to (i) being such as to provide a weight ratio of polymer solids to combined weight of (a), (b) and (c) of from 0.5:1 to 10:1, preferably 0.Type: GrantFiled: March 12, 2002Date of Patent: August 24, 2004Assignee: Fosroc International LimitedInventors: Peter Shelley Mills, David Neil Degville
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Publication number: 20040107877Abstract: A method and cement composition is provided for sealing a subterranean zone penetrated by a well bore, wherein the cement composition comprises zeolite, cementitious material, and water sufficient to form a slurry.Type: ApplicationFiled: December 10, 2002Publication date: June 10, 2004Applicant: Halliburton Energy Services, Inc.Inventors: Donald A. Getzlaf, Karen Luke, Keith A. Rispler, Russell M. Fitzgerald, Glen C. Fyten
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Patent number: 6743288Abstract: Improved well cement additives, compositions and methods of using the compositions are provided. The well cement additives are basically comprised of a first monomer selected from the group of 2-acrylamido-2-methylpropane sulfonic acid, 2-allyloxy-2-hydroxy-1-propane sulfonic acid and vinylsulfonic acid, a second monomer selected from the group of N,N-dimethylacrylamide, acrylamide, N-vinylpyrrolidone, N-vinylacetamide and acrylonitrile and a third monomer selected from the group of C6 to C22 dimethylaminopropylmethacrylamide bromide, chloride and iodide and C6 to C22 dimethylaminoethylmethacrylate bromide, chloride and iodide.Type: GrantFiled: October 28, 2002Date of Patent: June 1, 2004Assignee: Halliburton Energy Services, Inc.Inventors: Larry S. Eoff, B. Raghava Reddy
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Publication number: 20040094070Abstract: A cement composition is basically comprised of a hydraulic cement, water in an amount sufficient to form a pumpable slurry and a fluid loss control polymer additive comprised of 69 weight % of the calcium salt of 2-acrylamido-2-methyl propane sulfonic acid, 14 weight % of the calcium salt of maleic acid, 14 weight % of N-vinyl caprolactam and 3 weight % of 4-hydroxybutyl vinyl ether.Type: ApplicationFiled: November 14, 2003Publication date: May 20, 2004Inventors: Larry S. Eoff, Krista L. Keener
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Publication number: 20040083926Abstract: A dry mix for producing embedding or molding compositions for metal casting processes such as the lost wax process containing a hydraulic binder component composed of sulfate-carrier-free ground portland clinker.Type: ApplicationFiled: September 5, 2003Publication date: May 6, 2004Inventors: Darina Mitkova, G?uuml;nter Schneider
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Publication number: 20040060481Abstract: 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: ApplicationFiled: July 1, 2003Publication date: April 1, 2004Inventor: Joseph B. Schlenoff
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Publication number: 20040060479Abstract: A concrete composition and a method for forming a simulated stone product such as granite or marble uses a mixture of cement, sand, water, latex, silicate and a superplasticizer, the mixture being poured in a mold wherein at least one surface is of a smooth water impervious material and is preferably coated with a release agent, the poured product then having a controlled moisture release rate. The simulated stone product can be formed in any different configuration desired and is characterized by having a high gloss reading.Type: ApplicationFiled: September 30, 2002Publication date: April 1, 2004Inventor: Sam Valenzano
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Patent number: 6709508Abstract: Dry mortar formulations comprising a) from 0.5 to 80% by weight of hydraulic binder, b) from 0 to 97% by weight of fillers, c) from 0 to 3.5% by weight of thickeners, d) from 1.0 to 80% by weight of redispersible polymer powder, and e) from 0.0001 to 1.0% by weight of antioxidants exhibit improved tensile strength and other set mortar properties, particularly after storage of the dry mortar composition.Type: GrantFiled: May 14, 2002Date of Patent: March 23, 2004Assignee: Wacker Polymer Systems GmbH & Co. KGInventors: Ulf Dietrich, Theo Mayer
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Publication number: 20040000403Abstract: Methods of cementing subterranean zones penetrated by well bores and well cement compositions are provided. A well cement composition of the invention is basically comprised of a hydraulic cement, water in an amount sufficient to form a pumpable slurry and a fluid loss control polymer additive comprised of 69 weight % of the calcium salt of 2-acrylamido-2-methyl propane sulfonic acid, 14 weight % of the calcium salt of maleic acid, 14 weight % of N-vinyl caprolactam and 3 weight % of 4-hydroxybutyl vinyl ether.Type: ApplicationFiled: June 20, 2002Publication date: January 1, 2004Inventors: Larry S. Eoff, Krista L. Keener
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Publication number: 20030234102Abstract: The present invention provides methods and compressible foamed sealing compositions for sealing expandable pipe in well bores. The compressible sealant compositions for sealing expandable pipe are basically comprised of a hydraulic cement, a rubber latex, a rubber latex stabilizer, a gas and a mixture of foaming and foam stabilizing surfactants.Type: ApplicationFiled: June 21, 2002Publication date: December 25, 2003Inventors: Lance E. Brothers, Anthony V. Palmer
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Patent number: 6660077Abstract: An additive for elaboration of ecological permeable concretes. The additive containing from about 24.5% to 28.2% by weight of a mixture made of dispersing agents, from about 3.3% to 3.8% by weight of a humectant agent, from 0 to about 1% by weight of a non ionic surfactant, from 0 to about 3% by weight basis of a bactericidal agent, from about 3.3% to 3.8% by weight of hydroxypropylethyl or methylcellulose from 0 to about 0.3% by weight of an antifoaming agent and from about 55.8% to 64.2% by weight of a highly reactive non-crystalline calcinated silica aluminant.Type: GrantFiled: July 10, 2001Date of Patent: December 9, 2003Inventors: Nestor De Buen-Unna, Luis German Guevara-Nieto, Jaime Grau-Genesias
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Patent number: 6656266Abstract: Cementing compositions which are particularly suitable for squeeze cementing operations, comprise an aqueous phase, and a micro-cement, the aqueous phase including an aqueous suspension comprising a vinyl acetate type polymer obtained by chemically cross-linking a polyvinyl compound, a nanolatex and an anionic surfactant with a cloud point of more than 80° C.Type: GrantFiled: September 20, 2001Date of Patent: December 2, 2003Assignee: Schlumberger Technology CorporationInventors: Véronique Barlet-Gouedard, Pierre Maroy, Bruno Langlois, Roland Reeb
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Patent number: 6645292Abstract: Methods and compositions for cementing subterranean zones penetrated by well bores are provided. The methods are basically comprised of the steps of providing a cement composition which comprises a hydraulic cement, sufficient water to form a slurry and a dispersing agent comprising a tetrapolymer formed of methacrylic acid, methacrylate, methallyl sulfonic acid and ethoxylated acrylic acid. The cement composition is placed in the subterranean zone to be cemented and allowed to set into an impermeable solid mass therein.Type: GrantFiled: May 9, 2003Date of Patent: November 11, 2003Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, D. Chad Brenneis, Dennis W. Gray, Krista L. Keener
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Publication number: 20030205174Abstract: A method is disclosed for constructing, verifying, and maintaining underground vaults that isolate and contain radioactive burial sites. The method employs a buoyant lift technique to isolate a block of soil containing the contaminates from the surrounding soil. An impermeable synthetic liner is embedded in the vault to enhance the integrity of the system. The integrity of the vault is monitored by a system of sensors placed both inside and outside of the sealed vault. The method eliminates the need to excavate or drill in the contaminated areas.Type: ApplicationFiled: April 29, 2003Publication date: November 6, 2003Inventor: Ernest E. Carter
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Patent number: 6641660Abstract: The present invention provides stable well cementing methods and compositions for sealing subterranean zones penetrated by well bores. The improved thermally stable and degradation resistant well cement compositions are basically comprised of a hydraulic cement, sufficient water to form a pumpable slurry, an aqueous hydrogenated styrene-butadiene rubber latex and a latex stabilizer present in an amount sufficient to stabilize the hydrogenated styrene-butadiene latex.Type: GrantFiled: November 13, 2002Date of Patent: November 4, 2003Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, Roger S. Cromwell, Bobby J. King, Darrel C. Brenneis, Ronald J. Crook
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Patent number: 6630021Abstract: The present invention provides improved compositions and methods for cementing casing strings in deep water offshore formations penetrated by well bores. The cement composition basically comprises hydraulic cement, water, an environmentally degradable water reducing and dispersing additive, an environmentally degradable set retarding additive and an environmentally degradable compressive strength and set accelerating additive.Type: GrantFiled: August 7, 2002Date of Patent: October 7, 2003Assignee: Halliburton Energy Services, Inc.Inventors: B. Raghava Reddy, Russell M. Fitzgerald
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Patent number: 6630020Abstract: A cement additive composition for preventing discoloration of the surface of concrete, comprising a cement additive (a) and a water-reducing admixture (b), the additive (a) comprising a mixture of compounds represented by the general formula (1): R1O(AO)n1H (1) (wherein R1 is a C1-6 alkyl group, A is an ethylene group and/or a propylene group, and n1 is a number of 1 or more), containing all the compounds satisfying n1=2 to 6 in a total amount of not less than 40% by mass, and having an average n1 of 1.5 to 10, a molecular weight distribution Mw/Mn of not less than 1.05, a Z average molecular weight Mz of not less than 200 and a ratio of (a):(b) by mass of (5 to 99.5):(95 to 0.5). It can prevent the discoloration of the surface of concrete.Type: GrantFiled: August 15, 2001Date of Patent: October 7, 2003Assignees: Sanyo Chemical Industries, Ltd., Taiheiyo Cement CorporationInventors: Yoshihide Shimoyama, Takashi Ayata, Satoshi Tanaka, Fumiaki Hondo
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Publication number: 20030172850Abstract: 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: ApplicationFiled: March 10, 2003Publication date: September 18, 2003Inventors: Byong-wa Chun, Benita Dair, Charlotte B. Porteneuve, Ara Avedis Jeknavorian, Josephine Ho-Wah Cheung, Lawrence R. Roberts
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Patent number: 6616753Abstract: Methods and compositions for sealing subterranean zones penetrated by well bores are provided. The methods basically comprise the steps of introducing a sealing composition into the subterranean zone comprised of a hydraulic cement, sufficient water to form a slurry and a rapidly acting thixotropy providing gelling agent, and allowing the sealing composition to remain at rest in the zone whereby the sealing composition rapidly gels and then sets into a hard impermeable mass therein.Type: GrantFiled: December 11, 2001Date of Patent: September 9, 2003Assignee: Halliburton Energy Services, Inc.Inventors: B. Raghava Reddy, Karen Luke
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Publication number: 20030150364Abstract: The invention concerns the use of organic fibres having a melting point lower than 300° C., an average length l more than 1 mm and a diameter Ø not more than 200 &mgr;m, in ultra high performance concrete for improving the concrete fire resistance, the amount of organic fibres being such that their volume ranges between 0.1 and 3% of the concrete volume after setting and the concrete having a compressive strength at 28 days of at least 120 Mpa, a bending strength of at least 20 Mpa, and a spread value in non-hardened state of at least 150 mm, the values being for a concrete preserved at 20° C., the concrete consisting of a particularly hardened cement matrix wherein metal fibres are dispersed.Type: ApplicationFiled: February 20, 2003Publication date: August 14, 2003Inventors: Gilles Orange, Evelyne Prat, Pascal Casanova, Mouloud Behloul
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Patent number: 6591910Abstract: Methods and compositions for cementing subterranean zones penetrated by well bores are provided. The methods are basically comprised of the steps of providing a cement composition which comprises a hydraulic cement, sufficient water to form a slurry and a dispersing agent comprising a tetrapolymer formed of methacrylic acid, methacrylate, methallyl sulfonic acid and ethoxylated acrylic acid. The cement composition is placed in the subterranean zone to be cemented and allowed to set into an impermeable solid mass therein.Type: GrantFiled: January 29, 2003Date of Patent: July 15, 2003Assignee: Halliburton Energy Services, Inc.Inventors: Jiten Chatterji, D. Chad Brenneis, Dennis W. Gray, Krista L. Keener
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Patent number: 6565645Abstract: A hydraulic setting composition is provided. The composition when set has improved water absorption properties. The composition contains a hydraulically setting inorganic material such as calcium sulfate and an auxiliary of the formula A(—X[—CH2]p—ZY)k where A can be a linear or branched C1-24 alkyl group, a linlear or branched C2-24 alkenyl group each of which can be unsubstituted or substituted with 1 to 4 OH group, C6-24 aryl group and alkyl substituted C6-24 aryl groups each; having a valance K, Z is SO3 or COO−, Y is a proton, a metal ion or ammonium, P is from 1 to 30 and X is identical or different and can be where n is from 0-30, m is from 2 to 8, K is from 1 to 4, q is from 1-10, L is O, S or UR3, R2 and R3 are identical or different, linear or branched C1-12 alkyl or a polymer having a molecular weight (Mn) of at least 300 and contains anionic, cationic or anionic and cationic monomer units.Type: GrantFiled: December 12, 2000Date of Patent: May 20, 2003Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Johann Klein, Gaby Schilling, Thomas Fandel, Wolfgang Klauck, Hans-Peter Sattler
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Patent number: 6558461Abstract: An improved non-dispersing set retarder additive for foamed cements, cement compositions containing the additive, and methods of cementing in a subterranean zone penetrated by a well bore are provided. The set retarder additive includes a blend of a sulfonated lignin, preferably a lignosulfonate, with an alkali lignin, preferably a kraft lignin, having an organic sulfur content of 0-3.5% by weight in a ratio of about 6:4 to 8:2. The methods are basically comprised of the steps of preparing a foamed cement composition comprised of hydraulic cement, a non-dispersing set retarder, sufficient water to form a slurry, sufficient gas to foam the slurry and a foaming and foam stabilizing surfactant present in an amount sufficient to facilitate the formation of the foam and stabilize the foamed cement composition.Type: GrantFiled: November 21, 2001Date of Patent: May 6, 2003Assignee: Lignotech USA, Inc.Inventors: Stuart E. Lebo, Jr., Shane L. Resch
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Publication number: 20030061970Abstract: An additive for elaboration of ecological permeable concretes. The additive containing from about 24.5% to 28.2% by weight of a mixture made of dispersing agents, from about 3.3% to 3.8% by weight of a humectant agent, from 0 to about 1% by weight of a non ionic surfactant, from 0 to about 3% by weight basis of a bactericidal agent, from about 3.3% to 3.8% by weight of hydroxypropylethyl or methylcellulose from 0 to about 0.3% by weight of an antifoaming agent and from about 55.8% to 64.2% by weight of a highly reactive non-crystalline calcinated silica aluminant.Type: ApplicationFiled: July 10, 2001Publication date: April 3, 2003Inventors: Nestor De Buen-Unna, Luis German Guevara-Nieto, Jaime Grau-Genesias
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Publication number: 20030006038Abstract: The present invention provides improved compositions and methods for cementing casing strings in deep water offshore formations penetrated by well bores. The cement composition basically comprises hydraulic cement, water, an environmentally degradable water reducing and dispersing additive, an environmentally degradable set retarding additive and an environmentally degradable compressive strength and set accelerating additive.Type: ApplicationFiled: August 7, 2002Publication date: January 9, 2003Inventors: B. Raghava Reddy, Russell M. Fitzgerald
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Patent number: 6457524Abstract: The present invention provides improved lightweight well cement compositions useful for performing a variety of cementing applications in subterranean formations and particularly for cementing conductor pipe in offshore wells. A preferred cement composition basically comprises a hydraulic cement, an effective amount of an iron salt selected from the group of ferric chloride, ferrous chloride or mixtures thereof to reduce the transition time of the composition, sufficient water to form a pumpable slurry, an effective amount of a foaming additive for producing a foamed slurry, and sufficient gas to foam the slurry.Type: GrantFiled: September 15, 2000Date of Patent: October 1, 2002Assignee: Halliburton Energy Services, Inc.Inventor: Craig W. Roddy
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Patent number: 6454004Abstract: The present invention provides improved compositions and methods for cementing casing strings in deep water offshore formations penetrated by well bores. The methods are basically comprised of the steps of preparing a cement composition comprised of hydraulic cement, water, an environmentally degradable water reducing and dispersing additive, an environmentally degradable set retarding additive and an environmentally degradable compressive strength and set accelerating additive.Type: GrantFiled: February 21, 2001Date of Patent: September 24, 2002Assignee: Halliburton Energy Services, Inc.Inventors: B. Raghava Reddy, Russell M. Fitzgerald
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Patent number: 6391106Abstract: A cementitious mixture comprises a hydraulic cement; greater than about 10% by weight of a pozzolanic cement replacement selected from fly ash, slag, natural pozzolans, and mixtures thereof, based on the weight of said hydraulic cement and cement replacement; and a compatabilizing admixture, wherein the compatabilizing admixture comprises a compatabilizing derivatized polycarboxylate polymer dispersant capable of acting as a water reducer, in combination with an accelerator. The derivatized polycarboxylate dispersant, alone or in combination with other derivatized polycarboxylate dispersants, is a polymer comprising units derived from at least one of a substituted carboxylic acid monomer and a substituted ethylenically unsaturated monomer, at least one of an N-polyoxyalkylene maleimide and a condensation product of an unsubstituted carboxylic acid monomer and an alkoxypolyoxyalkylene primary amine substituted carboxylic acid monomer, and optionally including an unsaturated hydrocarbon.Type: GrantFiled: July 24, 2001Date of Patent: May 21, 2002Assignee: MBT Holding AGInventors: John Moreau, Runhai Lu, Jeffrey R. Bury, Thomas M. Vickers, Jr.
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Patent number: 6387176Abstract: A new category of multi-purpose polymers is presented, the polymers being capable to serve as a cement dispersing agent and which at the same time are set-accelerating and do have shrinkage reducing- and anticorrosive properties to steel. The polymers are ester and amide group-modified acrylic polymers, obtainable by a polymer analogous esterification of a polyacrylic acid with 1) a monofunctional polyalkyleneglycol-monoalkylether, 2) a tertiary alkanolamine and optionally 3) by amidation with a amino-polyalkylenglycol alkylether. The multi-purpose polymers serve for cement dispersing admixture for concrete with set accelerating, shrinkage compensating and anticorrosive properties to steel.Type: GrantFiled: April 17, 2000Date of Patent: May 14, 2002Assignee: Sika AG, vorm. Kaspar Winkler & Co.Inventors: Jürg Widmer, Ueli Sulser, Theodor A. Bürge, Ulf Velten, Anna Krapf-Huber
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Patent number: 6358310Abstract: Additive for cementitious compositions, comprising: at least one admixture, such a shrinkage reducing admixture, an air entraining admixture, a water reducing admixture, an inorganic salt, a corrosion inhibitor, an accelerator, a retarder, or mixture thereof; and a triblock polyoxyalkene copolymer surfactant having the formula R1O—(A1O)x—(A2O)y—(A1O)x—R2 wherein R1 and R2 individually represent hydrogen, a C1-C7 alkyl group, a C5-C6 cycloalkyl group, or an aryl group; A1 represents a C2 alkyl group, A2 represents a branched or linear C3 alkyl group; “x” represents an integer of 42-133; and “y” represents an integer of 21 to 68.Type: GrantFiled: June 14, 2001Date of Patent: March 19, 2002Assignee: W. R. Grace & Co.-Conn.Inventors: Neal S. Berke, Maria C. Hicks, James J. Malone
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Patent number: 6358311Abstract: New alkanolamine additives for improving the compressive strength, etc. of set cementitious compositions such as Portland cement concrete are described as having at least one alkanolamine or the salt thereof containing at least one alkanol group, and at least one ionic functional group other than hydroxyl group.Type: GrantFiled: December 7, 1999Date of Patent: March 19, 2002Assignee: Taiheiyo Cement CorporationInventors: Norihiko Arai, Makihiko Ichikawa, Susumu Sano
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Patent number: 6342101Abstract: A formulation for blending with raw concrete to form an admixture wherein a concrete plasticizer and migrating corrosion inhibitors are blended with concrete prior to pour. The plasticizer enhances the ability of the concrete to be worked and to be properly finished, and the migrating corrosion inhibitors provide protection of concrete reinforcements such as rebar against corrosion.Type: GrantFiled: October 11, 1999Date of Patent: January 29, 2002Assignee: Cortec CorporationInventors: Boris A. Miksic, Dubravka Bjegovic, Alla Furman
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Patent number: 6336505Abstract: The present invention provides improved methods of cementing casing strings in deep water offshore formations penetrated by well bores. The methods are basically comprised of the steps of preparing a cement composition comprised of hydraulic cement, water, gas, a mixture of foaming and foam stabilizing surfactants, a cement early strength accelerator and a mildly set retarding cement dispersing agent, placing the cement composition in the annulus between the casing string and the well bore and allowing the cement composition to set into a hard impermeable mass.Type: GrantFiled: July 15, 1999Date of Patent: January 8, 2002Assignee: Halliburton Energy Services, Inc.Inventor: Baireddy R. Reddy
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Patent number: 6309455Abstract: The present invention comprises a stable hydrocolloid composition in which preferably welan gum is uniformly dispersed in a superplasticizer solution such as sulfonated naphthalene, sulfonated melamine, modified lignosulfate, their derivatives and mixtures thereof. The solution is wet milled to form an extremely fine particle size distribution of the gum. The composition is rapidly hydratable and useful as a stabilizing additive in many cement and drilling fluid applications.Type: GrantFiled: August 21, 2000Date of Patent: October 30, 2001Assignee: CP Kelco U.S., Inc.Inventors: Bryan Skaggs, Harold Dial, Walter Rakitsky