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| Number | Title | Issue Date |
| 8188012 | Process of using hard brine at high alkalinity for enhanced oil recovery (EOR) applications The present invention describes the use of EDTA and/or alkali treated hard brine at high pH for making ASP formulations for EOR applications. ... | 05/29/2012 |
| 8183182 | Composition of microemulsion and method for advanced recovery of heavy oil A composition of a microemulsion including a mixture of a combination of surfactants and co-surfactants, an oil phase and an aqueous phase is described. In addition, a method for the advanced recovery of heavy oils is described which includes the steps of injecting ... | 05/22/2012 |
| 8183183 | Method of treating a wellbore at high temperature in contact with carbon dioxide A method for treating a subterranean formation is made of steps of providing a composition comprising a carrier fluid, a polymer viscosifying agent, carbon dioxide and a formate salt or formic acid; injecting into a wellbore, the composition; contacting the composit... | 05/22/2012 |
| 8163676 | Emulsifier blend An oil-in-water emulsion that includes a brine continuous phase; and an oleaginous discontinuous phase stabilized by an emulsifier blend, the emulsifier blend comprising: an emulsifier having an HLB greater than 11; and an amphoteric chemotrope is disclosed. Emulsif... | 04/24/2012 |
| 8114818 | Methods and compositions for altering the viscosity of treatment fluids used in subterranean operations An embodiment of the present invention includes a method comprising introducing a cyclodextrin modifier into a well bore penetrating a subterranean formation. Another embodiment of the present invention includes a method of reducing viscosity of a treatment fluid co... | 02/14/2012 |
| 8076270 | Wellbore treatment compositions The disclosed compositions and methods utilize hydrophilic polymers modified by the incorporation of one or more hydrophilic side groups. The polymers may exhibit physical association in solution at a specific temperature so as to provide a significant increase in v... | 12/13/2011 |
| 8022014 | Deep eutectic solvents and applications A method of solubilizing/removing cellulose or chemically-modified cellulosic polymers utilized in subterranean drilling operations such as fracturing. The method involves introducing a deep eutectic solvent (DES) into a subterranean region. Deep eutectic solvents u... | 09/20/2011 |
| 8008234 | Method and composition comprising at least three different average particle volume particulates for low damage gravel packing A gravel packing system, method and slurry. The system comprises a blending device to prepare a slurry comprising a carrier fluid suspending first, second and third particulates, wherein the carrier fluid comprises a brine and less than about 2.4 g/L (20 lb per 1000... | 08/30/2011 |
| 7947627 | Fluid loss control agent with triggerable removal mechanism A fluid loss control pill or solution includes a polymer having a functional group that can be hydrolyzed by a base or a nucleophile. A method for fluid loss control in a subterranean formation includes placing a fluid loss control pill or solution in a wellbore pen... | 05/24/2011 |
| 7923415 | Methods to reduce settling rate of solids in a treatment fluid The invention discloses a method of treating a subterranean formation of a well bore: providing a treatment fluid made of: a fluid; a particulate material, and a viscosifier material; wherein the viscosifier material is inactive in a first state and is able to incre... | 04/12/2011 |
| 7906462 | Mutual solvent system and method for improved oil and gas permeability in high temperature formations A method of acidizing and cleaning up a formation is disclosed, the formation being above 150 degrees C. The formation is treated with a mutual solvent system comprising a mutual solvent of oil and water, an aqueous acid, a corrosion inhibitor, and an iron control a... | 03/15/2011 |
| 7888294 | Energy recovery and reuse for gel production The present disclosure relates to systems and methods for producing a fracturing gel using a preheated hydration fluid. The hydration fluid can be preheated using heat energy recycled from a different part of the operation. Recycling the heat energy can, in certain ... | 02/15/2011 |
| 7871963 | Tunable surfactants for oil recovery applications The systems and methods described herein provide for modified lignins and other compositions that may be useful as surfactants. These compositions have particular utility for energy-related applications. In embodiments, they may be useful for enhanced oil recovery. ... | 01/18/2011 |
| 7863223 | Oil-based insulating packer fluid A packer or annular fluid includes a hydrocarbon fluid; and a gelling agent; wherein the packer fluid is a yield power law fluid. A method for preparing a packer fluid includes preparing a mixture of a hydrocarbon fluid, and a gelling agent; heating the mixture to a... | 01/04/2011 |
| 7851414 | Microemulsion containing oil field chemicals useful for oil and gas field applications Useful microemulsions have corrosion inhibitors in the internal phase and an external phase, where the corrosion inhibitor has a surfactant property that helps define the microemulsion. For example, the corrosion inhibitor itself may have its pH adjusted so that it ... | 12/14/2010 |
| 7803743 | Invert emulsion carrier fluid and oil-wetting agent and method of using same A gravel packing fluid and method for gravel packing a wellbore using a gravel packing fluid comprising an invert emulsion comprising oil as an external phase, clear brine as an internal phase, and a quantity of emulsifier effective to produce a stable invert emulsi... | 09/28/2010 |
| 7727935 | Dual-function additives for enhancing fluid loss control and stabilizing viscoelastic surfactant fluids Among many things, in some embodiments, dual-function additives that enhance fluid loss control and the stability of viscoelastic surfactant fluids, and their associated methods of use in subterranean formations, are provided. In one embodiment, the methods comprise... | 06/01/2010 |
| 7691790 | Composition and process for enhanced oil recovery The present invention includes a cost effective custom-designed blend of organic chemicals to stimulate oil production. The invention includes a chemical composition for use in drilling operations for oil recovery and the method of using the chemical composition. Th... | 04/06/2010 |
| 7691789 | Self-cleaning well control fluid A composition and method is given for a well control fluid that is injected into a well during completion or remediation and prevents fluid flow from a formation into the well during operations (such as shut-in, or placement or adjustment of tools/hardware) when no ... | 04/06/2010 |
| 7655603 | Clean-up additive for viscoelastic surfactant based fluids Clean-up additive compositions may be used to enhance the clean-up of VES-gelled aqueous fluids in a wide range of applications and VES fluid compositions, including use of an internal breaker system. The compositions are microemulsions that may include, but not nec... | 02/02/2010 |
| 7655604 | Process of hydraulic fracturing using a viscoelastic wellbore fluid Hydraulic fracturing of a subterranean hydrocarbon reservoir is carried out using an aqueous wellbore fluid which is an aqueous solution of a surfactant which has the formula (R1—X)nZ, where R1 is an aliphatic group comprising a C | 02/02/2010 |
| 7645724 | Compositions and use of mono- and polyenoic acids for breaking VES-gelled fluids Fluids viscosified with viscoelastic surfactants (VESs) may have their viscosities reduced (gels broken) by the direct or indirect action of a composition that contains at least one unsaturated fatty acid, such as a monoenoic acid and/or polyenoic acid. The unsatura... | 01/12/2010 |
| 7595280 | Delayed tackifying compositions and associated methods involving controlling particulate migration Delayed tackifying compositions are provided for reducing particulate migration in subterranean formations, the compositions comprising an aqueous tackifying agent and a delayed-acid releasing activator. ... | 09/29/2009 |
| 7409994 | Drilling well with drilling fluid of fluid phase and weighting agent An additive that increases the density of fluids used in a wellbore during the construction or repair of oil, gas, injection, water, or geothermal wells comprises In one illustrative embodiment the additive comprises a weighting agent, and more preferably an ultra-f... | 08/12/2008 |
| 7392845 | Method of treating oil or gas well with biodegradable emulsion A biodegradable water-in-synthetic oil base emulsion, effective in the removal of filter cakes, consists of an external phase of a surfactant emulsified in a paraffinic base oil. The emulsion is particularly effective in breaking-down the interfacial rheological pro... | 07/01/2008 |
| 7380606 | Composition and process for well cleaning Disclosed is a microemulsion well treatment microemulsion that is formed by combining a solvent-surfactant blend with a carrier fluid. In preferred embodiments, the solvent-surfactant blend includes a surfactant and a solvent selected from the group consisting of te... | 06/03/2008 |
| 7363978 | Methods of using reactive surfactants in subterranean operations Novel uses of reactive surfactants in treating subterranean formations and/or proppant particulates are provided. In one embodiment, the present invention provides a method comprising: providing a treatment fluid that comprises a base fluid and a reactive surfactant... | 04/29/2008 |
| 7361628 | Remote delivery of latex drag-reducing agent without introduction of immiscible low-viscosity flow facilitator Latex drag reducers and systems for delivering latex drag reducers are disclosed. The latex drag reducers comprise a polymer that is formed via an emulsion polymerization reaction dispersed in a continuous phase and can undergo subsequent modification in order to in... | 04/22/2008 |
| 7358215 | Quaternary ammonium salts as thickening agents for aqueous systems This invention relates to the use of alkyl amido quaternary ammonium salts, and formulations thereof, as thickening agents in aqueous based fluids, especially those used in oil field applications. The quaternary ammonium salts of the present invention exhibit improv... | 04/15/2008 |
| 7350571 | Methods of preparing and using coated particulates The present invention involves methods of preparing coated particulates and using such coated particulates in subterranean applications such as production enhancement and sand control. One embodiment of the present invention provides a method of preparing coated par... | 04/01/2008 |
| 7347263 | Networked polymeric gels and use of such polymeric gels in hydrocarbon recovery A composition includes water having a salinity of at least 1 ppt, at least one hydrophilic polymer containing primary (—NH2) and/or secondary (—NHR) amine groups and at least one saccharide containing a reducible function. A method of changing the per... | 03/25/2008 |
| 7341980 | Viscoelastic surfactant rheology modification A method for shortening the shear recovery time of zwitterionic viscoelastic surfactant fluids by adding a rheology enhancer having the structure: R-(EO)x(PO)y—R′—OH in which R is an alkyl group that is straight chaine... | 03/11/2008 |
| 7341103 | Compositions and methods for treating subterranean formations with liquefied petroleum gas The present invention relates to gelled fluids and methods for using liquefied petroleum gas in subterranean operations. More particularly, the present invention relates to servicing fluids that comprise gelled liquefied petroleum gas or servicing fluids that compri... | 03/11/2008 |
| 7338924 | Oil-in-water-in-oil emulsion An oil-in-water-in-oil emulsion (O/W/O) comprising a first oil-in-water emulsion dispersed in a second oil, and a method of preparing the same. The O/W/O emulsion can be used as a drive fluid in an enhanced oil recovery process. The O/W/O emulsion of this invention ... | 03/04/2008 |
| 7337839 | Fluid loss additive for enhanced fracture clean-up A hydraulic fracturing method is disclosed that includes designing a fracture treatment including a fluid pumping schedule to fracture a subterranean formation according to a design model that accounts for cumulative filter cake thickness, including polymer concentr... | 03/04/2008 |
| 7332460 | Alkylxylene sulfonates for enhanced oil recovery processes The present invention is directed to alkylxylene sulfonate for enhanced oil recovery processes. The alkylxylene moiety in the alkylxylene sulfonate contains a high percentage of the 4-alkyl-1,2-dimethyl benzene isomer and a high percentage of alkyl group attachment ... | 02/19/2008 |
| 7326817 | Process for reducing the toxicity of hydrocarbons This invention relates to a method for reducing the toxicity of a mixture of hydrocarbons by means of fractional distillation, a distillate having a reduced toxicity and a composition including the distillate. ... | 02/05/2008 |
| 7318474 | Methods and compositions for controlling formation fines and reducing proppant flow-back Provided herein are methods for controlling the migration of particulates within a portion of a subterranean formation that comprise aqueous tackifying treatment fluids, curable resin compositions, and/or noncurable resin compositions. ... | 01/15/2008 |
| 7316273 | Methods and compositions for enhancing hydrocarbon production The invention provides a composition for use in a subterranean formation penetrated by a wellbore, the composition comprising: a) a solvent consisting essentially of a water-soluble solvent selected from the group consisting of any solvent that is at least 25% by we... | 01/08/2008 |
| 7316275 | Well treating compositions containing water superabsorbent material and method of using the same A well treating composition containing a polysaccharide-based water-superabsorbent material has particularly applicability as a thermal insulating, fracturing or acid stimulation fluid. The water-superabsorbent material is capable of absorbing, at a minimum, its own... | 01/08/2008 |
