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| Number | Title | Issue Date |
| 7971644 | Fluid loss additive and breaking agent A system includes a hydraulic fracturing fluid including a polymeric constituent and an additive having particles including poly-vinyl acetate in an amount sufficient to control fluid loss. The system includes a formation of interest having a downhole temperature, a... | 07/05/2011 |
| 7726399 | Method of enhancing hydraulic fracturing using ultra lightweight proppants A subterranean formation having natural fractures, which is to be subjected to hydraulic fracturing, is first pre-treated with an ultra lightweight (ULW) proppant having an average particle size between from about 12/20 to about 40/70. The small ULW proppant flows i... | 06/01/2010 |
| 7699106 | Method for reducing fluid loss during hydraulic fracturing or sand control treatment A low viscosity fluid for reducing fluid loss in a relatively low permeability formation has a viscosity of less that 10 CP and contains a low molecular weight viscosifying agent The aqueous medium may be fresh water, salt water, brine or slickwater. The invention h... | 04/20/2010 |
| 7523784 | Method of using humic acid grafted fluid loss control additives in cementing operations 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 ... | 04/28/2009 |
| 7431106 | Drilling method A method of reducing formation breakdown during the drilling of a wellbore which method comprises: (a) circulating a drilling mud in the wellbore comprising (i) an aqueous or oil based fluid, (ii) at least one fluid loss additive at a concentration effective to achi... | 10/07/2008 |
| 7413013 | Surfactant-based fluid loss control agents for surfactant gels and associated fluids and methods Of the many methods provided, in one aspect, the present invention provides a method comprising: providing a treatment fluid comprising: an aqueous base fluid, a first surfactant, and a surfactant-based fluid loss control agent capable of forming a viscoelastic flui... | 08/19/2008 |
| 7407916 | Foamed treatment fluids and associated methods Foamed treatment fluids comprising water, a gas, and a foaming and foam stabilizing surfactant mixture comprising an alkali salt of an alkyl ether sulfate, wherein the alkali salt of the alkyl ether sulfate comprises an alkali salt of a C6-10 alkyl ether ... | 08/05/2008 |
| 7398826 | Well treatment with dissolvable polymer Well treatment is disclosed that includes injecting a well treatment fluid with insoluble polyol polymer such as polyvinyl alcohol (PVOH) dispersed therein, depositing the insoluble polymer in the wellbore or an adjacent formation, and thereafter dissolving the poly... | 07/15/2008 |
| 7380600 | Degradable material assisted diversion or isolation A method for well treatment by forming a temporary plug in a fracture, a perforation, a wellbore, or more than one of these locations, in a well penetrating a subterranean formation is provided, in which the method of well treatment includes: injecting a slurry comp... | 06/03/2008 |
| 7370701 | Wellbore completion design to naturally separate water and solids from oil and gas A wellbore completion design is provided, which creates a convective flow action that separates water and sand from hydrocarbons during production of the hydrocarbons from a subterranean formation. A deviated section of the wellbore creates the desired effect. The w... | 05/13/2008 |
| 7353876 | Self-degrading cement compositions and methods of using self-degrading cement compositions in subterranean formations Methods of stimulating subterranean formations are provided. More particularly, methods of fracturing subterranean formations using a fracturing fluid comprising a self-degrading cement composition are provided. An example of a method is a method of treating a subte... | 04/08/2008 |
| 7350572 | Methods for controlling fluid loss A method of treatment of subterranean formations in which leakoff through natural fractures is controlled through the use of fibers. The method involves pumping a mixture of a formation treatment fluid and a fiber into the formation for matrix stimulation, fracture ... | 04/01/2008 |
| 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 |
| 7343972 | System stabilizers and performance enhancers for aqueous fluids gelled with viscoelastic surfactants An aqueous, viscoelastic fluid gelled with a viscoelastic surfactant (VES) is stabilized and improved with an effective amount of an alkali earth metal oxide and/or alkali earth metal hydroxide. These fluids are more stable and have reduced or no tendency to precipi... | 03/18/2008 |
| 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 |
| 7325615 | Viscosified treatment fluids comprising polycarboxylic acid gelling agents and associated methods Novel polycarboxylic acid copolymer gelling agents and viscosified treatment fluids comprising these gelling agents, and their associated methods of use and manufacture are provided. In one embodiment, a method comprising: providing a viscosified treatment fluid com... | 02/05/2008 |
| 7311147 | Methods of improving well bore pressure containment integrity Methods of improving the pressure containment integrity of subterranean well bores are provided. The methods include pumping a fracture sealing composition into the well bore that rapidly converts into a high friction pressure sealing composition which is impermeabl... | 12/25/2007 |
| 7308936 | Methods of improving well bore pressure containment integrity Methods of improving the pressure containment integrity of subterranean well bores are provided. The methods include pumping a fracture sealing composition into the well bore that rapidly converts into a high friction pressure sealing composition which is impermeabl... | 12/18/2007 |
| 7299876 | Viscosified treatment fluids and associated methods of use In one embodiment, provided is a method of fracturing a portion of a subterranean formation that comprises providing a viscosified treatment fluid comprising a single salt aqueous fluid having a density of greater than 9 pounds per gallon and a crosslinked viscosify... | 11/27/2007 |
| 7284611 | Methods and compositions for controlling lost circulation in subterranean operations A lost circulation composition, that comprises a first portion of particles having a weight mean particle size of less than about 20 microns, a second portion of particles having a weight mean particle size in the range of from about 25 microns to about 400 microns,... | 10/23/2007 |
| 7278485 | Method of formulating and using a drilling mud with fragile gels A method for drilling, running casing in, and/or cementing a borehole in a subterranean formation without significant loss of drilling fluid is disclosed, as well as compositions for use in such method. The method employs a drilling fluid comprising a fragile gel or... | 10/09/2007 |
| 7273099 | Methods of stimulating a subterranean formation comprising multiple production intervals A method of stimulating a production interval adjacent a well bore having a casing disposed therein, that comprises introducing a carrier fluid comprising first particulates into the well bore, packing the first particulates into a plurality of perforations in the c... | 09/25/2007 |
| 7270179 | Method for stimulation of liquid flow in a well An improved method of controlled energy delivery utilizing solid, liquid, and gaseous carbon dioxide (CO2) into a water well and the surrounding aquifer to remove deposited material which may cause loss of capacity in wells and a variety of water quality ... | 09/18/2007 |
| 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 |
| 7256159 | Fluid loss reducer for high temperature high pressure water based-mud application The present invention concerns a water-based drilling mud for utilization in the drilling of oil wells comprising an aqueous phase wherein the aqueous phase contains an oil soluble polymer in the form of a gel as a fluid loss reducer. The subject invention further r... | 08/14/2007 |
| 7255169 | Methods of creating high porosity propped fractures Methods of forming a high porosity propped fracture comprising: providing a slurry comprising a fracturing fluid, proppant particulates, and a weighting agent; introducing the slurry into a portion of a fracture within the subterranean formation; and, depositing the... | 08/14/2007 |
| 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 |
| 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 |
| 7211548 | Treatment fluids comprising starch and ceramic particulate bridging agents and methods of using these fluids to provide fluid loss control Methods and compositions relating to fluid loss control operations are provided. More particularly, fluid loss treatment fluid compositions may comprise ceramic particulate bridging agents, a partially depolymerized starch derivative, and a base fluid. In some embod... | 05/01/2007 |
| 7181380 | System and process for optimal selection of hydrocarbon well completion type and design A process to determine optimal completion type and design prior to drilling of a hydrocarbon producing well utilizing information from hydrocarbon recovery modeling such as reservoir, geo-mechanical, and material modeling over the production life of the well. An emb... | 02/20/2007 |
| 7165617 | Viscosified treatment fluids and associated methods of use In one embodiment, provided is a method of fracturing a portion of a subterranean formation that comprises providing a viscosified treatment fluid comprising a single salt aqueous fluid having a density of greater than 9 pounds per gallon and a crosslinked viscosify... | 01/23/2007 |
| 7163358 | Injection grouting The invention relates to the use of a composition for injection grouting obtainable by mixing an alkali metal silicate or an organic silicate, colloidal silica particles, and at least one gelling agent, wherein the weight ratio of colloidal silica to silicate is fro... | 01/16/2007 |
| 7101829 | Fluid loss reducer for high temperature and high pressure water-based mud application The present invention concerns a water-based drilling mud for utilization in the drilling of oil wells comprising an aqueous phase wherein the aqueous phase contains an oil soluble polymer in the form of a gel as fluid loss reducer. The subject invention further rev... | 09/05/2006 |
| 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 |
| 7096943 | Method for growth of a hydraulic fracture along a well bore annulus and creating a permeable well bore annulus A method for growth of a hydraulic fracture or a tall frac is described wherein the tall frac is disposed next to a well bore using a sandpacked annulus. Also, a method for creating a permeable well bore annulus is disclosed. The method for creating the tall frac in... | 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 |
| 7087554 | Drilling fluids with improved shale inhibition and methods of drilling in subterranean formations The present invention provides improved drilling fluids that comprise improved shale inhibiting components, and methods for using these drilling fluids in connection with drilling in a subterranean formation. The drilling fluids comprise water and an improved shale ... | 08/08/2006 |
| 7066260 | Dissolving filter cake Methods are presented to induce a screenout during a subterranean formation fracturing or combined fracturing and gravel packing treatment having a viscoelastic surfactant-based carrier fluid by laying down a filter cake at least a portion of which is a base-soluble... | 06/27/2006 |
