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| Number | Title | Issue Date |
| 8138127 | Compositions and methods for treating a water blocked well using a nonionic fluorinated surfactant The present invention includes a method of treating a hydrocarbon-bearing clastic formation having non-connate water by contacting the hydrocarbon-bearing clastic formation with a composition that includes a solvent and a nonionic fluorinated polymeric surfactant wh... | 03/20/2012 |
| 8043998 | Method for treating a fractured formation with a non-ionic fluorinated polymeric surfactant The present invention includes compositions and methods of treating a hydrocarbon-bearing formation, the formation having at least one fracture, by contacting the fracture with a composition that includes a solvent and a nonionic fluorinated polymeric surfactant, wh... | 10/25/2011 |
| 7855169 | Use of fluorocarbon surfactants to improve the productivity of gas and gas condensate wells The present invention includes composition having a nonionic, fluorinated polymeric surfactant, water and solvent. Embodiments of compositions according to the present invention are useful, for example, for recovering hydrocarbons from subterranean clastic formation... | 12/21/2010 |
| 7772162 | Use of fluorocarbon surfactants to improve the productivity of gas and gas condensate wells The present invention includes composition having a nonionic, fluorinated polymeric surfactant, water and solvent. Embodiments of compositions according to the present invention are useful, for example, for recovering hydrocarbons from subterranean elastic formation... | 08/10/2010 |
| 7629298 | Sandstone having a modified wettability and a method for modifying the surface energy of sandstone Methods for modifying the wettability of sandstone. Compositions comprising sandstone having a modified wettability. Such wettability modifications may be useful, for instance, in improving the well-deliverability of an oil and/or gas well located in a sandstone for... | 12/08/2009 |
| 7595281 | Methods to increase recovery of treatment fluid following stimulation of a subterranean formation comprising in situ fluorocarbon coated particles The invention provides a method of treating a subterranean formation penetrated by a wellbore, the method comprising the steps of: (a) mixing a particulate and an active material to obtain an at least partially coated particulate, wherein: (i) water forms a contact ... | 09/29/2009 |
| 7585817 | Compositions and methods for improving the productivity of hydrocarbon producing wells using a non-ionic fluorinated polymeric surfactant Compositions comprise nonionic fluorinated polymeric surfactants and solvent. The solvent comprises: at least one of a polyol or polyol ether, wherein the polyol and polyol ether have from 2 to 25 carbon atoms; and at least one monohydroxy alcohol, ether, or ketone ... | 09/08/2009 |
| 7311752 | Electrostatic air filter The invention is a filter for gaseous media in which nano alumina fibers and second fibers are arranged in a matrix to create asymmetrical pores. The filter is a high efficiency, high capacity particulate filter that intercepts pathogens and other particulate matter... | 12/25/2007 |
| 7268100 | Shale inhibition additive for oil/gas down hole fluids and methods for making and using same An under-balanced drilling fluid additive is disclosed which reduces reactive shale and/or clay swelling during under-balanced drilling operations, where the additive includes an effective amount of a choline salt. A method for under-balanced drilling is also disclo... | 09/11/2007 |
| 7237612 | Methods of initiating a fracture tip screenout Methods of initiating a fracture tip screenout, that comprise pumping an annulus fluid into an annulus, between the subterranean formation and a work string disposed within a wellbore penetrating the subterranean formation, at an annulus flow rate; and reducing the ... | 07/03/2007 |
| 7205264 | Well treatment method using fluid containing lactic acid or salt thereof Fluids comprising an aqueous acid, synthetic polymer, metal crosslinking agent and lactic acid or a salt thereof have particular applicability in fracturing subterranean formations of an oil or gas well. The lactic acid acts as a delaying agent. As a result, crossli... | 04/17/2007 |
| 6729409 | Foamed nitrogen in liquid CO2 for fracturing A method for fracturing subterranean formations surrounding oil and gas wells using a fracturing fluid consisting of a foam constituted by a liquid phase and a gaseous phase. The liquid phase has a foam forming substance dissolved therein. The foam forming substance... | 05/04/2004 |
| 6509300 | Liquid CO2/hydrocarbon oil emulsion fracturing system A fracturing fluid is disclosed consisting of an emulsion having a continuous phase of a liquified gas, a discontinuous phase of a hydrocarbon, and a surfactant soluble in the two phases. The surfactant is preferably a hydrofluoroether.... | 01/21/2003 |
| 6069117 | Foamed resin compositions for sealing subterranean zones The present invention provides improved foamed hardenable epoxy resin sealing compositions and methods which are particularly useful in the construction and repair of wells. The foamed epoxy resin compositions are corrosion resistant and have improved mec... | 05/30/2000 |
| 5556832 | Solids-free, essentially all-oil wellbore fluid A solids-free, essentially all-oil wellbore fluid comprises (a) an organic fluid having (i) a melting point less than about 20° C. (about 68° F.), (ii) a flash point greater than about 54.4° C. (about 130° F.), and (iii) a dipole moment greater than 0... | 09/17/1996 |
| 5529122 | Method for altering flow profile of a subterranean formation during acid stimulation A method for acidizing a subterranean formation wherein a specific foam is used to block flow through the higher-permeable zones of the formation while the acid is being injected therein. The foam is generated from a surfactant solution comprised of a ble... | 06/25/1996 |
| 5082059 | Use of hydrocarbon-rich gels as fracturing fluids The present invention relates to the use of hydrocarbon-rich gels as fracturing fluids and also to fracturing fluids which are composed of a hydrocarbon-rich gel and an auxiliary.... | 01/21/1992 |
| 5074358 | Surfactant-stabilized foams for enhanced oil recovery A foam is provided for use in a subterranean oil-bearing formation for reducing and controlling the mobility of a gaseous drive fluid. The foam is generated using an inert gas and a fluorocarbon surfactant solution in admixture with an amphoteric or anion... | 12/24/1991 |
| 4997580 | Use of organic fluorochemical compounds with oleophobic and hydrophobic groups in crude oils as antideposition agents, and compositions thereof A method of inhibiting the deposition of paraffin wax, asphaltene, or mixtures thereof in a crude oil contaminated with paraffin wax, asphaltene, or mixtures thereof and susceptible to such depositions comprising the step of incorporating into said crude ... | 03/05/1991 |
| 4993448 | Crude oil emulsions containing a compatible fluorochemical surfactant A transportable crude oil in water emulsion which is stable to both breakdown and phase inversion up to at least about 50° C., containing an effective, compatible emulsion stabilizing amount of an anionic, nonionic or amphoteric fluorochemical surfactant... | 02/19/1991 |
| 4975208 | Compositions for use in steam enhanced oil recovery processes A composition for use in enhanced oil recovery procedures comprises steam having a vapor phase and a liquid phase and a fluorocarbon surfactant partitioned between the liquid and vapor phases. The partitioning of the fluorocarbon surfactant between the tw... | 12/04/1990 |
| 4923009 | Steam enhanced oil recovery processes and compositions for use therein A composition for use in enhanced oil recovery procedures comprises steam having a vapor phase and a liquid phase and a fluorocarbon surfactant partitioned between the liquid and vapor phases. The partitioning of the fluorocarbon surfactant between the tw... | 05/08/1990 |
| 4921635 | CO2 gels and methods for making A method for increasing the viscosity of CO2 comprising the steps of: mixing semi-fluorinated alkane and liquid CO2 ; and venting CO2 vapor from the liquid CO2 until the liquid CO2 becomes supersatura... | 05/01/1990 |
| 4921619 | Enhanced oil recovery through cyclic injection of fluorochemicals An oil recovery process comprising contacting an oil deposit with a blend of chemicals containing a fluorochemical of the formula [(Rf)n (R')p ]m Z (I) wherein each Rf is independently a pe... | 05/01/1990 |
| 4876018 | Use of organic fluorochemical compounds with oleophobic and hydrophobic groups in asphaltenic crude oils as viscosity reducing agents A method of reducing the viscosity of asphaltenic crude oils by incorporating into said crude oil an effective viscosity reducing amount of an oil soluble organic compound having at least one oleophobic and hydrophobic fluoroaliphatic group, and optionall... | 10/24/1989 |
| 4874044 | Method for oil recovery using a modified heteropolysaccharide A process for recovering hydrocarbons from a subterranean hydrocarbon bearing formation penetrated by an injection well and a production well which comprises injecting an aqueous drive fluid into the formation and forcing the drive fluid through the forma... | 10/17/1989 |
| 4836281 | Process for improving the gas sweeping of an oil formation, using foams mainly containing surfactants with perfluoric groups The invention concerns an enhanced oil recovery process improving the gas sweeping of an oil formation reservoir comprising at least one injection, through at least one injection well, either simultaneously or separately, of a plug of solution, preferably... | 06/06/1989 |
| 4823873 | Steam mediated fluorochemically enhanced oil recovery A steam mediated oil recovery process comprising contacting an oil deposit with a fluorochemical of the formula wherein each Rf is independently a perfluoroaliphatic or omega-hydroperfluoroaliphatic group each of which is optionally interrupted... | 04/25/1989 |
| 4775489 | Self-breaking foamed oil in water emulsion for stimulation of wells blocked by paraffinic deposits A self-breaking, foamed, oil-in-water emulsion contains a water-immiscible organic solvent for paraffins and asphaltenes, an aqueous nonformation-damaging component, an inert gas, and surface active agents selected to promote a stable foamed emulsion desp... | 10/04/1988 |
| 4769160 | Use of organic fluorochemical compounds with oleophobic and hydrophobic groups in asphaltenic crude oils as viscosity reducing agents A method of reducing a viscosity of asphaltenic crude oils by incorporating into said crude oil an effective viscosity reducing amount of an oil soluble organic compound having at least one oleophobic and hydrophobic fluoroaliphatic group, and optionally ... | 09/06/1988 |
| 4767545 | Use of organic fluorochemical compounds with oleophobic and hydrophobic groups in crude oils as antideposition agents, and compositions thereof A method of inhibiting the deposition of paraffin wax, asphaltene, or mixtures thereof in a crude oil contaminated with paraffin wax, asphaltene, or mixtures thereof and susceptible to such depositions comprising the step of incorporating into said crude ... | 08/30/1988 |
| 4739833 | Method of acidizing high-temperature subterranean formations Subterranean formations at temperatures above 250° F. are acidized by introducing a solution of a halogenated hydrocarbon and an organic solvent and allowing the halogenated hydrocarbon to hydrolyze in an aqueous medium to form a hydrohalic acid. Corrosi... | 04/26/1988 |
| 4735731 | Process for reversible thickening of a liquid Industrial liquids containing viscoelastic surfactant compositions can be reversibly thickened and broken. For example, a thickened industrial liquid can exhibit good solids carrying capacity, and after the viscosity of the liquid is broken, using techniq... | 04/05/1988 |
| 4702849 | Method of increasing hydrocarbon production from subterranean formations A method of treating a carbonate-containing subterranean formation to increase the production of hydrocarbons therefrom. The formation is contacted with an aqueous solution of one or more of certain anionic aminophosphonate compounds whereby the compositi... | 10/27/1987 |
| 4624795 | Aqueous acid gels and use thereof Copolymers of a predominant proportion of an olefinically unsaturated sulfonic acid, an acrylamide, a vinyl phosphonic acid, and optionally other copolymerizable vinyl monomers, form aqueous acid gel compositions when added to the aqueous acid along with ... | 11/25/1986 |
| 4609043 | Enhanced oil recovery using carbon dioxide An enhanced oil recovery process in which carbon dioxide is injected into the oil-bearing formation under supercritical conditions to act as a solvent for the oil. Mobility of the carbon dioxide is controlled by the use of a dissolved polymer whose solubi... | 09/02/1986 |
| 4609477 | Liquid foaming additives used in the stimulation of oil and gas wells This invention relates to a liquid foaming additive comprising (a) a nonionic fluorochemical surfactant; and (b) a nonionic heteric polyether surfactant having at least two additive hydrogen atoms wherein components (a) and (b) are used in an effective amounts... | 09/02/1986 |
| 4585065 | Methods of increasing hydrocarbon production from subterranean formations The present invention relates to a method of treating a carbonate-containing subterranean formation to increase the production of hydrocarbons therefrom. The subterranean formation is contacted with an aqueous solution of a composition represented by the ... | 04/29/1986 |
| 4565639 | Method of increasing hydrocarbon production by remedial well treatment Methods of increasing hydrocarbon production from subterranean hydrocarbon-containing formations having impaired permeability are provided wherein the formations are contacted with a penetrating solvent and cationic perfluoro compounds represented by the ... | 01/21/1986 |
| 4565248 | Method for producing water soluble resols and use therefor The effluent stream from a process for producing phenolic compounds is reacted with an aldehyde in the presence of a base to form a water soluble resol which is useful in enhanced oil recovery.... | 01/21/1986 |
