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| Number | Title | Issue Date |
| 7842652 | Cement compositions comprising humic acid grafted fluid loss control additives Exemplary embodiments of the cement compositions comprise water, a cement, and a fluid loss control additive, the fluid loss control additive comprising a graft copolymer. The graft copolymer comprises a backbone and at least four grafted monomers selected from the ... | 11/30/2010 |
| 7576040 | Cement compositions comprising humic acid grafted fluid loss control additives Exemplary embodiments of the cement compositions comprise water, a cement, and a fluid loss control additive, the fluid loss control additive comprising a graft copolymer. The graft copolymer comprises a backbone and at least four grafted monomers selected from the ... | 08/18/2009 |
| 7351680 | High performance water-based mud system A drilling fluid or mud additive having several components, including leonardite (humic acid); potassium acetate; partially hydrolyzed polyacrylamide (PHPA); polyanionic cellulose polymer (PAC); sulfonated asphalt; sulfoalkylated tannin; polystyrene maleic anhydride... | 04/01/2008 |
| 7232483 | Cement composition having chromium reducer 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 antio... | 06/19/2007 |
| 7226895 | Drilling fluid systems for reducing circulation losses A circulation loss combination for water-based drilling fluid system(s) comprising: a first amount of alkali metal silicate; a second amount of water insoluble particulate; and, a quantity of water soluble activating agent effective to reduce the pH of the water-bas... | 06/05/2007 |
| 7087110 | Liquid additive for intergrinding cement 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 antio... | 08/08/2006 |
| 6806232 | Composition of drilling fluids comprising ground elastomeric crumb rubber material and a method of decreasing seepage and whole mud loss using such composition Well-working fluid compositions containing certain processed inorganic, oil and water wettable ground elastomeric crumb rubber materials to decrease the seepage loss of various fluids to subterranean formations in which these well working fluids are required and uti... | 10/19/2004 |
| 5911276 | Use of unmodified kraft lignin, an amine and a water-soluble sulfonate composition in enhanced oil recovery A method for the enhanced recovery of oil comprises injecting into an oil-containing formation an aqueous surfactant system having at least (1) a blend containing an unmodified Kraft lignin, an oil-soluble amine and a water-soluble sulfonate, and (2) wate... | 06/15/1999 |
| 5755295 | Modular drilling fluid system and method A modular drilling mud system is described in terms of five different modules. A first module contains caustic, a natural wax and a natural thinner. A second module contains components of the first module and an alkali metal aluminate prepared by reacting... | 05/26/1998 |
| 5656070 | Corrosion inhibiting compositions containing plant derived catechol complexes Corrosion inhibiting composition include the use of certain plant derived catechol complexes in aqueous based compositions, such as process water, and other aqueous and non-aqueous solvent based coating compositions. The compositions have corrosion inhibi... | 08/12/1997 |
| 5399548 | Blended drilling fluid thinner A blended additive composition, which is useful for thinning aqueous drilling fluids, is disclosed. The composition includes a first component selected from the group including: a modified tannin, a modified lignite and sodium lignosulfonate; a second com... | 03/21/1995 |
| 5114599 | Use of lignin/amine/surfactant blends in enhanced oil recovery A method for the enhanced recovery of oil comprised of injecting into an oil containing formation an aqueous surfactant system comprised of a blend of an oil soluble amine, a lignin selected from the group consisting of lignosulfonates and sulfonated alka... | 05/19/1992 |
| 5095986 | Enhanced oil recovery using oil soluble sulfonates from lignin and benzyl alcohol The invention is a method of producing oil soluble surfactants from lignin which comprises reacting benzyl alcohol with lignin phenol at elevated temperature in the presence of a non-nucleophilic basic catalyst to produce a lignin phenol reaction product,... | 03/17/1992 |
| 5094296 | Lignin amine microemulsions The invention is a method of recovering hydrocarbons from an underground hydrocarbon formation having at least one injecting well and at least one production well which comprises injecting a microemulsion into the formation through an injection well, driv... | 03/10/1992 |
| 5094295 | Enhanced oil recovery using alkylated, sulfonated, oxidized lignin surfactants The invention is a method of producing water soluble surfactants from lignin, which comprises alkylating lignin at phenolic oxygen sites with an alkyl chain having about 3 to about 24 carbon atoms, sulfonating the alkylated lignin, and oxidizing the alkyl... | 03/10/1992 |
| 5035288 | Lignin phenol/lignin/amine surfactant system The invention is a method of recovering hydrocarbons from an underground hydrocarbon formation penetrated by at least one injection well and at least one production well, which comprises injecting into an underground formation through an injection well ab... | 07/30/1991 |
| 5035813 | Process and composition for treating underground formations penetrated by a well borehole An aqueous fluid for treating underground, carbon dioxide-containing formations penetrated by casing regions of a wellbore, prior to the cementing of casings into the wellbore, comprises: (i) water, (ii) an agent which substantially increases (preferably ... | 07/30/1991 |
| 5032296 | Well treating fluids and additives therefor An additive for reducing the water loss and improving other properties of well treating fluids in high temperature subterranean environments and well treating fluids including the additive are provided. The additive comprises a mixture of a water soluble ... | 07/16/1991 |
| 4836285 | Composition and methods for reducing the permeability of underground strata The invention provides a method for the enhanced recovery of oil from an oil-bearing stratum having a zone of high fluid permeability through plugging of this zone by introducing into the stratum a gelable solution which, in the case of use under moderate... | 06/06/1989 |
| 4821803 | High salinity polymer drive for surfactant flooding systems The invention is a method of recovering hydrocarbons from an underground hydrocarbon formation penetrated by at least one injection well and at least one production well, in which a saline polymer slug containing about 0.1% to about 3.0% of a drive fluid ... | 04/18/1989 |
| 4822501 | Use of lignin/amine/surfactant blends in enhanced oil recovery A method for the enhanced recovery of oil comprised of injecting into an oil containing formation an aqueous surfactant system comprised of a blend of an oil soluble amine, a lignin selected from the group consisting of lignosulfonates and sulfonated alka... | 04/18/1989 |
| 4790382 | Alkylated oxidized lignins as surfactants The invention is a method of producing surfactants from lignin which comprises subjecting lignin to two reactions, alkylation with an alkyl chain having about 3 to about 24 carbon atoms at phenolic sites, and oxidation sufficient to break the lignin into ... | 12/13/1988 |
| 4787454 | Recovering hydrocarbons with surfactants from lignin A method of producing surfactants from lignin is disclosed by reducing lignin in the presence of a carbon monoxide or hydrogen reducing agent at high temperature and pressure to produce low molecular weight lignin phenols and subjecting the lignin phenols... | 11/29/1988 |
| 4781251 | Recovering hydrocarbons with water soluble alkylphenol lignin surfactants The invention is a method of recovering hydrocarbons with a surfactant flooding system, wherein the surfactant slug comprises about 0.1% to about 10% by weight of an alkylphenol lignin surfactant. The alkylphenol lignin surfactant is produced by reacting ... | 11/01/1988 |
| 4780220 | Drilling and completion fluid A drilling mud comprises water, a gelling agent, a defoamer and at least 6% by volume of a glycerine selected from the group consisting of glycerine, polyglycerine and mixtures thereof. The drilling mud is normally prepared by adding to a pre-existing wat... | 10/25/1988 |
| 4756370 | Lignin amine surfactant system followed by sequential polymer slugs The invention is a method of recovering hydrocarbons from an underground hydrocarbon formation penetrated by at least one injection well and at least one production well, which employs the steps of injecting a lignin amine surfactant slug, injecting an aq... | 07/12/1988 |
| 4743633 | Compositions and methods for reducing the permeability of underground strata The invention provides a method for the enhanced recovery of oil from an oil-bearing stratum having a zone of high fluid permeability through plugging of this zone by introducing into the stratum a gelable solution which, in the case of use under moderate... | 05/10/1988 |
| 4737295 | Organophilic polyphenolic acid adducts Organophilic polyphenolic materials which are effective fluid loss control additives for oil base well-working fluids are prepared from a polyphenolic material and one or more phosphatides. Preferred phosphatides are phosphoglycerides obtained from vegeta... | 04/12/1988 |
| 4735732 | Filtration control additive for invert emulsion drilling fluids and method of preparation The present invention relates to a filtration control additive for use in invert emulsion drilling fluids; the method of preparing such additives; the invert emulsion drilling fluid produced therefrom; and a method of drilling, completing, and working ove... | 04/05/1988 |
| 4728444 | Filtration control additive for invert emulsion drilling fluids and method of preparation The present invention relates to a filtration control additive for use in invert emulsion drilling fluids; the method of preparing such additive; the invert emulsion drilling fluid produced therefrom; and a method of drilling, completing, and working over... | 03/01/1988 |
| 4715971 | Well drilling and completion composition A well drilling and completion fluid having a potassium salt of a copolymer of (a) acrylic acid, or an -substituted acrylic acid and (b) acrylate ester having the general formula CH2 .dbd.CH--COOR where R is an alkyl or hydroxyalkyl havi... | 12/29/1987 |
| 4713185 | Sacrificial agents for enhanced oil recovery Sacrificial agents employed in methods of obtaining oil from rock formations by surfactant flooding comprising oxidized and/or chlorinated lignin and lignin-like derivatives obtained form inexpensive and readily available sources. In one form of the inven... | 12/15/1987 |
| 4671883 | Fluid loss control additives for oil-based well-working fluids Fluid loss control additives for oil-based well-working fluids comprise a solubilized lignite derivative and an oil-swellable or oil-soluble polymer. The solubilized lignite derivative may be oil-solubilized (e.g. a lignite/amine complex) or water-solubil... | 06/09/1987 |
| 4611659 | Oxidized alkali lignins and their use in enhanced oil recovery A method of enhanced oil recovery comprising injecting a surfactant system comprised of an oxidized alkali lignin and an anionic and/or nonionic surfactant into a formation containing oil and producing the oil thus mobilized.... | 09/16/1986 |
| 4509597 | Soda-anthraquinone lignin sacrificial agents in oil recovery A supplemental oil recovery method comprising injecting into a subterranean formation a fluid containing soda-anthraquinone lignin which is adsorbed by adsorptive sites therein and functions as a sacrificial agent and thereafter injecting a micellar dispe... | 04/09/1985 |
| 4501672 | Organic compounds A fluid loss reducing additive for an oil-based well working fluid is the product of mixing together, in an oil or oil-based fluid, lignite or humic acid with an aliphatic amide or hydroxyamide, or a cyclic derivative thereof, containing no primary or sec... | 02/26/1985 |
| 4421655 | Organophilic polyphenolic acid additives for well-working compositions The invention provides novel organophilic derivatives of polyphenolic compounds which are readily soluble and/or dispersible in hydrocarbons to prepare oil base well-working compositions having a low filter loss. These fluid loss additives are obtained by... | 12/20/1983 |
| 4313500 | Sacrificial adsorbate for surfactants utilized in chemical floods of enhanced oil recovery operations The present invention is directed to a sacrificial or competitive adsorbate for surfactants contained in chemical flooding emulsions for enhanced oil recovery operations. The adsorbate to be utilized in the method of the present invention is a caustic eff... | 02/02/1982 |
| 4246124 | Gelled compositions and well treating Gelled compositions suitable as fracture fluids and water diversion agents comprising water, a polymeric viscosifier, an aldehyde component, and at least one phenolic component such as resorcinol, catechol, and the like, as well as selected oxidized pheno... | 01/20/1981 |
| 4240505 | Well acidizing compositions and methods Gelled acidic compositions suitable for matrix acidizing or fracture acidizing of subterranean formations are provided comprising water, a water-dispersible polymeric viscosifier such as a polymer of acrylamide, an acid, and a polyphenolic material such a... | 12/23/1980 |
