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| Number | Title | Issue Date |
| 8066073 | Methods of limiting leak off and damage in hydraulic fractures Methods for treating a formation penetrated by a wellbore which improves fluid loss control during treatment. In some aspects, the treatments include preparing an aqueous fluid including one or more water inert polymers and an optional viscosifier, injecting the aqu... | 11/29/2011 |
| 7931089 | Proppant and methods of use A proppant consists of a core part and shell of a material different from the material of the core part. The shell comprises a soft material attached rigidly to the core part in such a way that the total surface area of the points where the shell and the core part a... | 04/26/2011 |
| 7806185 | Treatment fluids comprising friction reducers and antiflocculation additives and associated methods Methods comprising: providing an aqueous treatment fluid comprising an aqueous fluid, a friction reducing polymer, and an antiflocculation additive; and introducing the treatment fluid into a subterranean formation. Methods of fracturing a subterranean formation com... | 10/05/2010 |
| 7779915 | Methods of limiting leak off and damage in hydraulic fractures Methods for treating a formation penetrated by a wellbore which improves fluid loss control during treatment. In some aspects, the treatments include preparing an aqueous fluid including one or more water inert degradable polymers and an optional viscosifier, inject... | 08/24/2010 |
| 7775282 | Methods of limiting leak off and damage in hydraulic fractures Methods for treating a formation penetrated by a wellbore which improves fluid loss control during treatment. In some aspects, the treatments include preparing an aqueous fluid including one or more water inert polymers and an optional viscosifier, injecting the aqu... | 08/17/2010 |
| 7770647 | Hydraulic fracturing of subterranean formations Methods of hydraulically fracturing subterranean coal seams and formations resulting in improved permeability to stimulate Coalbed Methane. In one method, the coal seam is fractured using a proppant-containing fracturing fluid in alternating stages with an aqueous b... | 08/10/2010 |
| 7703531 | Multifunctional nanoparticles for downhole formation treatments An aqueous, viscoelastic fluid gelled with a viscoelastic surfactant (VES) is stabilized with an effective amount of an alkaline earth metal oxide alkaline earth metal hydroxide, alkali metal oxides, alkali metal hydroxides transition metal oxides, transition metal ... | 04/27/2010 |
| 7398829 | Methods of limiting leak off and damage in hydraulic fractures Methods for treating a formation penetrated by a wellbore which improves fluid loss control during treatment. In some aspects, the treatments include preparing an aqueous fluid including one or more water inert polymers and an optional viscosifier, injecting the aqu... | 07/15/2008 |
| 7392844 | Method of treating an oil or gas well with biodegradable low toxicity fluid system A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a fatty acid ester, such as methyl soyate. The fluid system may further contain a lactic acid ester, such as ethyl lactate, and/or a nonionic surfactant. Th... | 07/01/2008 |
| 7380601 | Degradable fiber systems for stimulation A method for minimizing the amount of metal crosslinked viscosifier necessary for treating a wellbore with proppant or gravel is given. The method includes using fibers to aid in transporting, suspending and placing proppant or gravel in viscous carrier fluids other... | 06/03/2008 |
| 7350579 | Sand aggregating reagents, modified sands, and methods for making and using same A method for treating solid materials is disclosed, where the treating compositions coats surfaces or portions of surfaces of the solid materials changing an aggregation or agglomeration propensity of the materials. Treated solid materials are also disclosed. The me... | 04/01/2008 |
| 7345013 | Polymer Crosslinking System Comprising Soluble Zr(IV), Carbonate and Bicarbonate Ions A composition useful for making gelled fluids by crosslinking hydratable polymers is an aqueous solution of zirconium complexed with carbonate and bicarbonate as the only multidentate ligands complexed with zirconium. The composition also provides pH modifying capab... | 03/18/2008 |
| 7341104 | Methods of using substantially hydrated cement particulates in subterranean applications Fracturing fluids comprising a base fluid and substantially hydrated cement particulates. Methods of fracturing a subterranean formation comprising fracturing the subterranean formation so as to create or enhance one or more fractures in the subterranean formation; ... | 03/11/2008 |
| 7341107 | Viscoelastic acid An acidic viscoelastic surfactant fluid composition is formulated with an acid, for example hydrochloric acid, a cationic surfactant, for example a quaternary amine, and a break-enabling salt, for example NH4Cl. The fluid composition has low viscosity as ... | 03/11/2008 |
| 7334640 | Methods for reducing the viscosity of treatment fluids Methods of treating a subterranean formation comprising providing a viscosified treatment fluid that comprises a base fluid and a gelling agent, providing a breaker composition that comprises an oxidizing breaker and a breaker activator that comprises a metal and a ... | 02/26/2008 |
| 7328744 | Methods and compositions for treating subterranean formations with gelled hydrocarbon fluids In one embodiment, a method of treating a subterranean formation is provided comprising the steps of providing a gelled liquid hydrocarbon treatment fluid comprising a liquid hydrocarbon and a gelling agent that comprises a polyvalent metal salt of an organophosphon... | 02/12/2008 |
| 7303018 | Method of acidizing a subterranean formation with diverting foam or fluid A method of acidizing a subterranean formation with a diverting agent composed of a gelled or thickened viscoelastic foam or fluid generated from (i.) an amidoamine oxide gelling agent and (ii.) an acid or foam, water and/or brine. The gelled or thickened foam or fl... | 12/04/2007 |
| 7281580 | High porosity fractures and methods of creating high porosity fractures The present invention relates to high porosity propped fractures and methods of creating high porosity propped fractures in portions of subterranean formations. Another embodiment of the present invention provides a method of forming a high porosity propped fracture... | 10/16/2007 |
| 7275596 | Method of using degradable fiber systems for stimulation A method for minimizing the amount of metal crosslinked viscosifier necessary for treating a wellbore with proppant or gravel is given. The method includes using fibers to aid in transporting, suspending and placing proppant or gravel in viscous carrier fluids other... | 10/02/2007 |
| 7267171 | Methods and compositions for stabilizing the surface of a subterranean formation Methods comprising providing a fracturing fluid comprising proppant particulates at least partially coated with a hardenable resin composition that comprises a hardenable resin component and a hardening agent component, wherein the hardenable resin component compris... | 09/11/2007 |
| 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 |
| 7267170 | Self-degrading fibers and associated methods of use and manufacture Methods are provided including a method of treating a portion of a subterranean formation comprising: providing a treatment fluid comprising a plurality of self-degrading fibers, the self-degrading fibers comprising an outer shell and a core liquid; placing the trea... | 09/11/2007 |
| 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 |
| 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 |
| 7237609 | Methods for producing fluids from acidized and consolidated portions of subterranean formations A method of stimulating and stabilizing an area of a subterranean formation comprising placing an acid fluid into an area of a subterranean formation and allowing the acid to at least partially dissolve a portion of the area of the subterranean formation; placing a ... | 07/03/2007 |
| 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 |
| 7237610 | Degradable particulates as friction reducers for the flow of solid particulates and associated methods of use Particulate compositions that comprise macro-particulates, and degradable particulates in an amount sufficient to reduce friction between the macro-particulates, the degradable particulates having a mean particle diameter of at least about 20 times smaller than the ... | 07/03/2007 |
| 7225874 | Methods and compositions for reducing the viscosity of treatment fluids used in subterranean operations Methods and compositions for reducing the viscosity of subterranean treatment fluids that comprise a gelling agent utilizing breakers that comprise hydroquinone and/or a derivative thereof. In one embodiment, the present invention provides a method comprising: provi... | 06/05/2007 |
| 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 |
| 7219731 | Degradable additive for viscoelastic surfactant based fluid systems A method is given for treating a subterranean formation penetrated by a wellbore with a viscosified fluid. The fluid contains a solid hydrolysable polyacid that upon dissolution and hydrolysis releases an acid that is a breaker for the viscosifying system. Suitable ... | 05/22/2007 |
| 7216709 | Hydraulic fracturing using non-ionic surfactant gelling agent The present invention generally relates to a method for treating a subterranean formation with an aqueous viscoelastic treating fluid that an aqueous base fluid and one or more non-ionic amido amine oxide surfactant gelling agents. The treatment method comprises inj... | 05/15/2007 |
| 7207386 | Method of hydraulic fracturing to reduce unwanted water production A method of hydraulically fracturing a hydrocarbon-bearing subterranean formation ensures that the conductivity of water inflow below the productive zone of the subterranean formation is reduced. The method consists of two principal steps. In the first step, a fract... | 04/24/2007 |
| 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 |
| 7165613 | Propped fracture with high effective surface area Propped fractures in formations from which fluids are produced are described that have wormholes extending out into the formations from the faces of the fractures at locations distant from boreholes. Methods are given for creating such propped fractures having wormh... | 01/23/2007 |
| 7166560 | Generating Acid Downhole in Acid Fracturing An acid fracturing method is provided in which the acid is generated in the fracture by hydrolysis of a solid acid-precursor selected from one or more than one of lactide, glycolide, polylactic acid, polyglycolic acid, a copolymer of polylactic acid and polyglycolic... | 01/23/2007 |
| 7159658 | Methods and compositions for treating subterranean zones Methods and compositions for breaking treatment fluids utilized in the stimulation of a subterranean formation. ... | 01/09/2007 |
| 7128158 | Lightweight composite particulates and methods of using such particulates in subterranean applications The present invention relates to lightweight composite particulates and their use in subterranean applications such as production enhancement and completion. One embodiment of the present invention provides a method of forming a lightweight particulate suitable for ... | 10/31/2006 |
| 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 |
| 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 |
| 7108066 | Variable density treatment fluids and methods of using such fluids in subterranean formations The present invention provides variable density fluid compositions and methods for using such compositions in a subterranean formation. One exemplary embodiment of the variable density fluid compositions of the present invention comprises a variable density fluid co... | 09/19/2006 |
