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| Number | Title | Issue Date |
| 7427584 | Treating composition Treating compositions containing mutual solvents suitable for forming and maintaining single-phase aqueous fluid treating compositions containing very high concentrations of acids and/or chelating agents are described. Methods of use of these treating compositions f... | 09/23/2008 |
| 7399732 | Fracturing fluid containing amphoteric glycinate surfactant An improved method and fracturing fluid for hydraulic fracturing of a subterranean formation, the fracturing fluid including a surfactant, a water soluble or dispersible anionic organic salt, an acid and a low molecular weight organic solvent. ... | 07/15/2008 |
| 7395863 | Method of treating a subterranean formation with an oil-based composition containing a polysaccharide-based water-superabsorbent material 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... | 07/08/2008 |
| 7378378 | Rheology enhancers A method for increasing the rate of shear rehealing of fluids made with cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of a rheology enhancer package containing, for example a polyethylene glycol-polypropyl... | 05/27/2008 |
| 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 |
| 7343976 | Methods of treating subterranean formations using derivatized gelling agents One embodiment of the present invention provides methods of treating a subterranean formation with a viscosified treatment fluid comprising combining water, a carbonyl-containing first compound, and an amine-containing second compound; wherein the carbonyl-containin... | 03/18/2008 |
| 7314850 | Methods and compositions for treating subterranean formations with gelled hydrocarbon fluids Improved methods and compositions for treating subterranean formations penetrated by well bores are provided. A method for breaking a gelled hydrocarbon fluid comprised of a hydrocarbon liquid, a ferric iron or aluminum polyvalent metal salt of a phosphonic acid est... | 01/01/2008 |
| 7293611 | CO miscible optimized hydrocarbon blends and methods of using CO miscible optimized hydrocarbon blends A method of treating a subterranean formation comprising the steps of providing a servicing fluid comprising carbon dioxide and a hydrocarbon blend, wherein the hydrocarbon blend comprises at least about 65% hydrocarbons having from six carbons (C6) to el... | 11/13/2007 |
| 7262154 | Methods and compositions for breaking viscosified fluids Improved methods for treating and for fracturing subterranean formations and the fluid compositions are provided. The viscosity of a treating fluid containing gelling agents is broken, even at temperatures of about 250° F. and lower, utilizing an oxidizing breaker ... | 08/28/2007 |
| 7256160 | Fracturing fluids for delayed flow back operations It has been discovered that certain fracturing fluid compositions can be used to fracture a subterranean formation and be permitted to stay within the formation for a relatively extended period of time, for example 28 days or more, before being flowed back or produc... | 08/14/2007 |
| 7244694 | Viscoelastic fluids containing nanotubes for oilfield uses The present invention relates to viscoelastic fluids that contain nanotube structures that may be used advantageously as oilfield stimulation fluids in many different applications, most particularly as a fracturing fluid. Viscoelastic fluid compositions of the prese... | 07/17/2007 |
| 7238648 | Viscoelastic surfactant fluids and related methods of use Viscoelastic surfactant based aqueous fluid systems useful as thickening agents in various applications, e.g. to suspend particles produced during the excavation of geologic formations. The surfactants are zwitterionic/amphoteric surfactants such as dihydroxyl alkyl... | 07/03/2007 |
| 7223719 | Breaker composition and process A process for reducing the viscosity of fracturing fluids in downhole oilfield operations is provided. The process comprises contacting a sulfamate stabilized, bromine-based breaker with an aqueous polysaccharide fracturing fluid, with the breaker present in an amou... | 05/29/2007 |
| 7216704 | Methods and compositions for breaking viscosified fluids Improved methods for treating and for fracturing subterranean formations and the fluid compositions are provided. A method presented herein is a method of reducing the viscosity of a viscosified treatment fluid that comprises providing a viscosified treatment fluid ... | 05/15/2007 |
| 7205263 | Recyclable foamed fracturing fluids and methods of using the same Fracturing fluids and methods of fracturing a subterranean formation using such fluids are provided. A fracturing fluid having a first pH is foamed by introducing a gas to the fluid. The fracturing fluid comprises a surfactant that facilitates formation of the foam ... | 04/17/2007 |
| 7205262 | Friction reducing composition and method Water soluble nonionic friction reducers and added to coacervate gels having excellent shear viscosities and other properties. A preferred gel comprises poly diallyl dimethyl ammonium chloride, a lesser amount of sodium lauryl sulfonate, and lauryl alcohol. Excellen... | 04/17/2007 |
| 7201227 | Method and composition for treating a subterranean formation with splittable foams Disclosed herein is a method of treating a subterranean formation utilizing a fluid having a splittable foamer, i.e., a fluid that creates a stable foam when it contacts the formation but that loses its ability to foam as it remains in contact with the formation for... | 04/10/2007 |
| 7168490 | Optimized hydrocarbon blends and methods of using optimized hydrocarbon blends The present invention relates to servicing fluids for use in subterranean operations. More particularly, the present invention relates to improved servicing fluids comprising optimized hydrocarbon blends and methods of using such servicing fluids in subterranean for... | 01/30/2007 |
| 7144844 | Method of using viscoelastic vesicular fluids to enhance productivity of formations A process for enhancing the productivity of a formation consists of introducing into the formation a viscoelastic fluid which contains at least one surfactant, at least one quaternary amine polyelectrolyte, water, and a non-aqueous solvent. The surfactant forms aggr... | 12/05/2006 |
| 7125825 | Amidoamine salt-based viscosifying agents and methods of use Viscoelastic surfactants are described for use in aqueous systems to generate thickened fluids. The surfactants are alkyl amidoamine salts of inorganic acids and/or organic acids. The fluids may also contain inorganic salts, organic salts or mixtures thereof. Additi... | 10/24/2006 |
| 7125826 | Methods of using invertible oil external-water internal fluids in subterranean applications Methods of using invertible oil external-water internal emulsions in drilling, hydraulic fracturing, gravel packing and completion and then inverting the emulsion to a water external-oil internal emulsion are provided. The methods basically comprise the steps of con... | 10/24/2006 |
| 7117943 | Friction reducers for fluids comprising carbon dioxide and methods of using friction reducers in fluids comprising carbon dioxide Reduced friction fluids comprising an aqueous liquid, carbon dioxide, and a polymer comprising acrylamide and an acrylamide copolymer derivative. And methods of treating a subterranean formation comprising the steps of providing a reduced friction fluid comprising a... | 10/10/2006 |
| 7096947 | Fluid loss control additives for use in fracturing subterranean formations The present invention relates to subterranean fracturing operations, and more particularly to fracturing fluids that includes a fluid loss control additive, and methods of using such fracturing fluids in fracturing subterranean formations. In one embodiment, a fract... | 08/29/2006 |
| 7090015 | Methods of treating subterranean zones and viscous aqueous fluids containing xanthan and a combination cross-linker—breaker Methods of treating subterranean zones and viscous aqueous fluids containing xanthan biopolymer gelling agent and a combination crosslinker and delayed breaker are provided. A viscous cross-linked aqueous treating fluid of the invention comprises water, a xanthan po... | 08/15/2006 |
| 7084096 | Suspension of borates in non-aqueous solvents and use thereof A non-aqueous suspension including boron-containing particulates, a low molecular weight polyalkylene glycol and a suspension stabilizer is provided. Methods of crosslinking water soluble polymers and of fracturing a subterranean formation are also provided. ... | 08/01/2006 |
| 7084092 | Shale hydration inhibition agent and method of use A water-base fluid for use in drilling, cementing, workover, fracturing and abandonment of subterranean wells through a formation containing a shale which swells in the presence of water. In one illustrative embodiment, the drilling fluid includes, an aqueous based ... | 08/01/2006 |
| 7078370 | Biodegradable chelant compositions for fracturing fluid It has been discovered that biodegradable and non-toxic chelant compositions can perform multiple beneficial functions in an aqueous fracturing fluid through the chelation of ions. Some of the multiple functions include various combinations of the following: demulsi... | 07/18/2006 |
| 7067459 | Well stimulation compositions A well service fluid composition comprises a fracturing fluid and a gas hydrate inhibitor. Preferably, the gas hydrate inhibitor does not affect the function of the fracturing fluid and is present in an amount sufficient to control and/or minimize the formation of g... | 06/27/2006 |
| 7060661 | Acid thickeners and uses thereof The present invention generally relates to aqueous, acidic compositions thickened with an amidoamine oxide gelling agent and/or viscoelastic surfactant of the general formula I: wherein R1 is a saturat... | 06/13/2006 |
| 7033976 | Fluid system additive A new fluid system additive is provided that serves to disperse and maintain fluid system solids in a stabilized condition and also “toughen” the filter cake. Fluid systems containing this additive also tolerate calcium contamination better than existing additiv... | 04/25/2006 |
| 7018956 | Crosslinked polymer fluids and crosslinking concentrates therefor Disclosed is a concentrate composition for crosslinking polysaccharide polymers hydrated in an aqueous liquid, and well servicing fluids, preferably fracturing fluids, prepared therewith. Preferred polysaccharide polymers are galactomannan gums or derivatives thereo... | 03/28/2006 |
| 7012044 | Oil and gas recovery from subterranean formations Methods are provided for fracturing subterranean formations using fluids having substantially reduced polymer loadings that have performance equivalent to conventional fluids. Reduced polymer loadings provide significant advantages such as reduced treatment costs an... | 03/14/2006 |
| 7001872 | Subterranean formation treating fluid and methods of fracturing subterranean formations The present invention relates to methods and compositions for treating subterranean well formations, and more specifically, to improved subterranean formation treating fluid concentrates, treating fluids and methods of using such treating fluids in subterranean form... | 02/21/2006 |
| 6986392 | Recyclable foamed fracturing fluids and methods of using the same Fracturing fluids and methods of fracturing a subterranean formation using such fluids are provided. A fracturing fluid having a first pH is foamed by introducing a gas to the fluid. The fracturing fluid comprises a surfactant that facilitates formation of the foam ... | 01/17/2006 |
| 6986391 | Methods of fracturing subterranean zones penetrated by well bores and fracturing fluids therefor The present invention provides improved methods of fracturing subterranean zones penetrated by well bores and improved fracturing fluids. The fracturing fluids are basically comprised of water, a terpolymer of 2-acrylamido-2-methylpropane sulfonic acid, acrylamide a... | 01/17/2006 |
| 6966379 | Methods of fracturing a subterranean formation using a pH dependent foamed fracturing fluid Methods of fracturing a subterranean formation include providing a fracturing fluid having a first pH. The fracturing fluid may be made by combining a gelling agent, a surfactant, and a proppant. The surfactant is capable of facilitating foaming of the fracturing fl... | 11/22/2005 |
| 6949491 | Method and materials for hydraulic fracturing of wells Hydraulic fracturing of wells by injecting a degradable polymer phase as a fracturing fluid is provided. Composition and degree of polymerization of the degradable polymer and the selection of additives may be varied to adjust the viscosity, degradation time and oth... | 09/27/2005 |
| 6945329 | Methods and compositions for placing particulate materials in subterranean zones Methods and compositions for placing particulate materials in subterranean zones penetrated by well bores. In one embodiment, the methods comprise: providing a compacted particulate material fluid that comprises a compacted particulate material, and a foam within th... | 09/20/2005 |
| 6936575 | Borate crosslinker suspensions with more consistent crosslink times The invention provides an aqueous suspension/concentrate of a sparingly soluble borate, preferably as disclosed in Mondshine U.S. Pat. No. 4,619,776, which is effective in crosslinking aqueous solutions of a water soluble, borate-crosslinkable polymer, preferably gu... | 08/30/2005 |
| 6918445 | Methods and compositions for treating subterranean zones using environmentally safe polymer breakers Methods and compositions for treating subterranean zones penetrated by well bores utilizing environmentally safe viscous fluids including a solubility increasing boron complex or ester forming compound. A method of the invention comprises the following steps. A visc... | 07/19/2005 |
