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| Number | Title | Issue Date |
| 8181702 | Application of degradable fibers in invert emulsion fluids for fluid loss control A method of treating a subterranean formation including emplacing in a wellbore a fluid, comprising an oleaginous continuous phase, a non-oleaginous discontinuous phase, an emulsifier, at least one degradable material, and at least one bridging material, and contact... | 05/22/2012 |
| 8091638 | Methods useful for controlling fluid loss in subterranean formations Methods of controlling fluid loss in a subterranean formation comprising: providing a treatment fluid comprising an aqueous fluid and a fluid loss control additive comprising a water-soluble polymer having hydrophobic or hydrophilic modification; introducing the tre... | 01/10/2012 |
| 8016039 | Method of reducing water influx into gas wells A method of reducing water influx into a wellbore, wherein the wellbore is in fluid communication with a subterranean formation such as a gas producing formation or gas reservoir. The method particularly places a gelant in a desired position down the wellbore and in... | 09/13/2011 |
| 7997342 | Subterranean treatment fluids comprising viscoelastic surfactant gels Among many things, in some embodiments, improved viscoelastic surfactant gels that comprise non-aqueous tackifying agents, and their associated methods of use, are provided. In one embodiment, the methods comprise: providing a treatment fluid that comprises an aqueo... | 08/16/2011 |
| 7987910 | Methods for manipulation of the flow of fluids in subterranean formations A method of treating a subterranean formation penetrated by a wellbore to mitigate the production of unwanted fluids from the wellbore is carried out by forming a treatment fluid containing at least one of an oil-wetting or water-repelling surfactant and a carrier f... | 08/02/2011 |
| 7886822 | System, method, and apparatus for acid fracturing with scale inhibitor protection A method for treating a subterranean formation includes forming a treatment fluid including a carrier fluid, a solid acid-precursor, and a solid scale inhibitor. The solid acid-precursor includes a material that forms an acid at downhole conditions in the subterrane... | 02/15/2011 |
| 7832478 | Methods for manipulation of air flow into aquifers A method of treating a subterranean formation penetrated by a wellbore to mitigate the production of unwanted air from the wellbore is carried out by forming a treatment fluid containing a water-wetting surfactant and a carrier fluid. The treatment fluid is then int... | 11/16/2010 |
| 7828061 | Method and apparatus for on-site nitrate production for a water processing system An electric plasma arc apparatus and method produces nitrogen compounds, solely using ambient air extracted in proximity to the apparatus. The nitrogen compounds are brought into contact with a water processing system, forming nitrate on-site. Hydrogen sulfide prese... | 11/09/2010 |
| 7770644 | Self diverting matrix acid A method is described for treating a subterranean formation with a low viscosity fluid system that contains a viscoelastic surfactant at a concentration too low to viscosify the fluid, but that is concentrated in the formation so that the fluid system gels. The flui... | 08/10/2010 |
| 7748452 | Polymeric microspheres as degradable fluid loss additives in oilfield applications A method of plugging a fracture in a subterranean formation which includes placing into the fracture a composition comprising microspheres or microbeads, wherein the microspheres are created by surface crosslinking of droplets in a water-in-water emulsion. Such micr... | 07/06/2010 |
| 7703521 | Polymeric microspheres as degradable fluid loss additives in oilfield applications Methods and apparatus for forming a fluid for use within in a subterranean formation including crosslinking a polymer along the surface of microspheres in a water-in-water emulsion and introducing the microspheres into the subterranean formation. Methods and apparat... | 04/27/2010 |
| 7686081 | Squeeze process for reactivation of well treatment fluids containing diatomaceous earth A process for fracturing a subterraneous formation in the production of an oil well is described. The process steps include injecting an initial charge of a mixture, the mixture being formed from at least diatomaceous earth and at least one well treatment agent, int... | 03/30/2010 |
| 7686080 | Acid-generating fluid loss control additives and associated methods Many methods are provided herein including a method of providing fluid loss control comprising: providing a treatment fluid; adding to the treatment fluid an acid-generating fluid loss control additive comprising an acid-generating component wherein the acid-generat... | 03/30/2010 |
| 7621329 | Methods of pumping fluids having different concentrations of particulate at different average bulk fluid velocities to reduce pump wear and maintenance in the forming and delivering of a treatment fluid into a wellbore The invention is for a method of forming and delivering a treatment fluid into a wellbore. In one aspect, a method is provided for pumping a first fluid having a relatively high concentration of a particulate suspended therein and pumping a second fluid having eithe... | 11/24/2009 |
| 7621328 | Methods of pumping fluids having different concentrations of particulate with different concentrations of hydratable additive to reduce pump wear and maintenance in the forming and delivering of a treatment fluid into a wellbore The invention is for a method of forming and delivering a treatment fluid into a wellbore. In one aspect, a method is provided for pumping a first fluid having a relatively high concentration of a particulate suspended therein and pumping a second fluid having eithe... | 11/24/2009 |
| 7621330 | Methods of using a lower-quality water for use as some of the water in the forming and delivering of a treatment fluid into a wellbore The invention is for a method of forming and delivering a treatment fluid into a wellbore. In one aspect, a method is provided for pumping a first fluid having a relatively high concentration of a particulate suspended therein and pumping a second fluid having eithe... | 11/24/2009 |
| 7614450 | Pumping system and method for injecting a mixture of liquids into a subterranean formation A system and method to inject a combined hydrocarbon-based liquid stream and a liquid carbon dioxide stream into a subterranean formation via a well using a single high-pressure pump. ... | 11/10/2009 |
| 7584791 | Methods for reducing the viscosity of treatment fluids comprising diutan Methods are provided that include a method comprising providing a treatment fluid comprising a base fluid and a gelling agent that comprises a diutan composition; providing a breaker that comprises an acid composition; allowing the breaker to interact with the treat... | 09/08/2009 |
| 7565929 | Degradable material assisted diversion Degradable material assisted diversion (DMAD) methods for well treatment, DMAD treatment fluids, and removable plugs for DMAD in downhole operations. A slurry of solid degradable material is injected into the well, a plug of the degradable material is formed, a down... | 07/28/2009 |
| 7556100 | Apparatus and method for delivering chemicals into an underground well In some embodiments, a method of delivering at least one chemical into an underground well equipped with a reciprocating plunger includes retaining the plunger above the well after the well is unloaded and shut in, dispensing at least one chemical into the well and ... | 07/07/2009 |
| 7552771 | Methods to enhance gas production following a relative-permeability-modifier treatment Provided embodiments relate to introducing a water-drainage-rate-enhancing agent into a subterranean formation to enhance gas production following a relative-permeability-modifier treatment to decrease undesired water production. An exemplary embodiment provides a m... | 06/30/2009 |
| 7530393 | Friction loss reduction in viscoelastic surfactant fracturing fluids using low molecular weight water-soluble polymers Adding relatively low molecular weight water-soluble friction loss reduction polymers to an aqueous fluid gelled with a viscoelastic surfactant (VES) increases the critical generalized Reynold's number at which the Fanning friction factor increases and friction pres... | 05/12/2009 |
| 7493955 | Well treating compositions for slow release of treatment agents and methods of using the same A composite of a well treatment agent adsorbed onto a water-insoluble adsorbent is useful in the treatment of oil and gas wells and may be introduced, as a well treatment fluid, with a carrier fluid. The water-insoluble adsorbent may be activated carbon, silica part... | 02/24/2009 |
| 7448448 | System and method for treatment of a well A fluid injection system is used in a well. Fluid stages are arranged in repeating series within a tubing of the fluid injection system to facilitate control over effects of injection. A sensor system can be used to detect one or more parameters related to the fluid... | 11/11/2008 |
| 7422062 | Methods of treating subterranean formations using treatment fluids comprising chlorinated carbohydrates Subterranean treatment operations, and more particularly, methods of treating subterranean formations using treatment fluid compositions including chlorinated carbohydrates, are provided. An example of a method is a method of treating a subterranean formation, inclu... | 09/09/2008 |
| 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 |
| 7401653 | Substances to stimulate the extraction of crudeoil and a method of processing them Substances to stimulate the extraction of crude oil and a method, of processing them: This invention is about substances to stimulate the extraction of crude oils, especially the ponderous and paraffin one, not clogging the route and the abutting deposits of the oil... | 07/22/2008 |
| 7398824 | Method for inhibiting or controlling inorganic scale formations with copolymers of acrylamide and quaternary ammonium salts A formulation containing a copolymer derived from a cationic monomer effectively inhibits and controls the formation of inorganic scales. Suitable copolymers include those comprising an acrylamide unit and a quaternary ammonium salt group, and optionally an acrylate... | 07/15/2008 |
| 7395861 | Methods of cementing subterranean formations using cement compositions comprising maltodextrin Subterranean treatment operations, and more particularly, methods of cementing subterranean formations using cement compositions including maltodextrin, are provided. An example of a method of the present invention is a method of cementing a subterranean formation, ... | 07/08/2008 |
| 7392848 | Methods to produce sulfate-free saline water and gypsum Methods are disclosed for the selective separation of sulfate from a saline stream such as seawater to produce nearly sulfate-free saline stream for oil-fields water injection operations. The separated sulfate in the form of gypsum from the treated saline stream can... | 07/01/2008 |
| 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 |
| 7360595 | Method and system for underground treatment of materials A method for underground treatment of subsurface materials comprises providing an injection pattern and a recovery pattern, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and ... | 04/22/2008 |
| 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 |
| 7353879 | Biodegradable downhole tools A disposable downhole tool or a component thereof comprises an effective amount of biodegradable material such that the tool or the component thereof desirably decomposes when exposed to a wellbore environment. In an embodiment, the biodegradable material comprises ... | 04/08/2008 |
| 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 |
| 7351680 | High performance water-based mud system A drilling fluid or mud additive having several components, including leonardite (humic acid); potassium acetate; partially hydrolyzed polyacrylamide (PHPA); polyanionic cellulose polymer (PAC); sulfonated asphalt; sulfoalkylated tannin; polystyrene maleic anhydride... | 04/01/2008 |
| 7350573 | Servicing a wellbore with wellbore fluids comprising perlite Wellbore fluids comprising an expanded and ground perlite and methods of using the same are disclosed. In one embodiment, the methods include a method of cementing comprising preparing or placing a cement composition comprising cement, water, and an expanded and gro... | 04/01/2008 |
| 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 |
| 7347264 | Methods and compositions for well completion in steam breakthrough wells Methods of steam flooding for stimulating hydrocarbon production are provided. In general, the methods comprise the steps of: (A) injecting a mutual solvent preflush fluid capable of dissolving oil into the near-wellbore region of at least a portion of a wellbore; (... | 03/25/2008 |
| 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 |
