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| Number | Title | Issue Date |
| 8091646 | Single phase microemulsions and in situ microemulsions for cleaning formation damage Single phase microemulsions (SPMEs) and in situ-formed microemulsions may be used to clean up and remove non-polar materials from reservoir production zones of oil and gas wells. This clean up occurs by solubilization of the non-polar material into the microemulsion... | 01/10/2012 |
| 8091645 | In situ fluid formation for cleaning oil- or synthetic oil-based mud Nanoemulsion, macroemulsions, miniemulsions, microemulsion systems with excess oil or water or both (Winsor I, II or III phase behavior) or single phase microemulsions (Winsor IV) improve the removal of filter cakes formed during hydrocarbon reservoir wellbore drill... | 01/10/2012 |
| 8074717 | Drilling method and downhole cleaning tool A method for drilling a well with a drilling apparatus comprising a drill string and a bit, comprising attaching a cleaning tool comprising a coaxial pipe and at least one vortex spinner to a portion of the drill string above the bit, inserting the drill string into... | 12/13/2011 |
| 8002038 | Liquid carbon dioxide cleaning of wellbores and near-wellbore areas using high precision stimulation The invention relates to cleaning wellbores and the near wellbore areas adjacent to a hydrocarbon bearing formations and coal bed methane formations. In a particular aspect, the invention relates to removing liquids such as water and/or oil from the formation near t... | 08/23/2011 |
| 7997343 | Dynamic scale removal tool and method of removing scale using the tool A scale removal tool with adjustably positionable fluid dispensing arms. The scale removal tool may be configured for delivery to within a hydrocarbon well via coiled tubing. Thus, fluid may be driven through the coiled tubing and through the tool at the fluid dispe... | 08/16/2011 |
| 7975765 | Enclosed circulation tool for a well An enclosed circulation tool for a well including a tubular body having a top end, a bottom end and an interior cavity. A progressive cavity pump positioned at the bottom end of the body, the pump having a rotor mounted within a stator. The rotor has an upper end an... | 07/12/2011 |
| 7975766 | Top filling tubing A method of top-filling a drill pipe string comprises injecting fluid into the upper end of the string. Apparatus for use in top-filling a drill pipe string comprises an injector adapted to co-operate with the upper end of a drill pipe string, whereby fluid may be p... | 07/12/2011 |
| 7896080 | Method of improving hydrocarbon production from a gravel packed oil and gas well This invention relates to enhancing hydrocarbon production from a subterranean formation via a well completed with a gravel pack. Gravel packs suffer plugging and damage over time from produced particles and other plugging materials brought into the pack as producti... | 03/01/2011 |
| 7789154 | Eductor jet bushing for downhole use A jet bushing for a wellbore cleanup tool features a jet looking uphole to reduce turbulence at the outlet ports that look downhole to accommodate the recirculation flow around the tool that captures the cuttings. The uphole oriented port keeps the pumped fluid down... | 09/07/2010 |
| 7762334 | Eccentrically-disposed choke injector An apparatus that is usable with a well includes a tool and a shroud. The tool is to be disposed in a wellbore and includes an opening to inject fluid into the well. The shroud at least partially surrounds the tool to eccentrically dispose the tool with respect to a... | 07/27/2010 |
| 7753125 | Rotating, jet-biased wellbore cleaning tool A wellbore cleaning tool having a plurality of fluid jets arranged on one side of a tool body and brushes or other implements for applying an abrasion force arranged on a second side of the tool body. In operation, the fluid jets, when turned on, bias the tool body ... | 07/13/2010 |
| 7712536 | Filtercake removal A treatment fluid and a method are disclosed for cleaning borehole filtercake using the treatment fluid, wherein the filtercake contains reservoir drilling fluid (RDF) solids. The method includes pumping the treatment fluid downhole in contact with the filtercake to... | 05/11/2010 |
| 7677318 | Well maintenance equipment and procedure The present invention relates to a method of removing deposits from various types of wells (17) including environmental recovery, water supply, horizontal, barrier, injection, recharge, and/or disposal wells (17). The method includes equipping a well (... | 03/16/2010 |
| 7650941 | Equalizing injection tool An equalizing injection wash tool includes a plurality of interconnectable wash tool segments. Each of the segments provides a flow applicator nozzle for transmitting fluid/and or solid from the interior flowbore of the wash tool and into the surrounding formation. ... | 01/26/2010 |
| 7644766 | Flushing device and method of flushing an annular space A flushing device (20) comprising an inner sleeve (21), axially slidable relative to an outer sleeve (23). The inner (21) and outer (23) sleeves cooperate to define an inner passage (32) for the flow of a fluid, and are perm... | 01/12/2010 |
| 7464760 | Inhibiting reservoir souring using a treated injection water A process for inhibiting souring in a hydrocarbon reservoir provides a feed water including a plurality of phosphorous constituents and having an elevated phosphorous concentration. At least some of the phosphorous constituents are removed from the feed water to pro... | 12/16/2008 |
| 7455113 | Downhole impeller device A downhole impeller device for use within a well, comprising: a body connectable to a drill string and having an external diameter smaller than the well diameter so as to form an annulus between the body and the well; and one or more impeller members extending from ... | 11/25/2008 |
| 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 |
| 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 |
| 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 |
| 7392846 | Silicate-containing additives for well bore treatments and associated methods Methods and compositions for use in subterranean operations, and more particularly, additives comprising one or more silicates used to treat tar resident in a well bore, and methods of use, are provided. In one embodiment, the method comprises a method of treating t... | 07/01/2008 |
| 7392845 | Method of treating oil or gas well with biodegradable emulsion A biodegradable water-in-synthetic oil base emulsion, effective in the removal of filter cakes, consists of an external phase of a surfactant emulsified in a paraffinic base oil. The emulsion is particularly effective in breaking-down the interfacial rheological pro... | 07/01/2008 |
| 7383881 | Stabiliser, jetting and circulating tool A downhole tool (10) for use in oil and/or gas well bores. The tool has a tubular body (20) and a sleeve (22) including stabilizer blades (30). The tool is ball (76), activated, weight activated or hydraulically activated to select... | 06/10/2008 |
| 7377283 | Coiled tubing wellbore cleanout A method and apparatus for substantially cleaning fill from a borehole is described variously including running a coiled tubing assembly into the wellbore, creating a fluid vortex by circulating cleaning fluid through the coiled tubing, and pulling the coiled tubing... | 05/27/2008 |
| 7367405 | Electric pressure actuating tool and method Disclosed herein is a downhole tool actuation arrangement. The arrangement includes a housing having a chamber, at least one piston in operable communication with the chamber and at least one electrode exposed to the chamber. The electrodes are receptive to a power ... | 05/06/2008 |
| 7367401 | Ported velocity tube for gas lift operations An apparatus for use with a packer set within a well bore comprises a first flow path providing fluid communication between the well bore above the packer and the well bore below the packer, and a second flow path. A system for gas lifting fluids from a well bore wi... | 05/06/2008 |
| 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 |
| 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 |
| 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 |
| 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 |
| 7347259 | Downhole oilfield erosion protection by using diamond A device for use with components for a downhole tool—such as a throat, a nozzle, or a diffuser—used for cleaning a wellbore, are disclosed which decreases the erosion of the components. The device may be comprised of a hardened material, such as stack of pure di... | 03/25/2008 |
| 7343978 | Scale dissolver fluid A scale dissolver fluid for dissolving scale in a subterranean hydrocarbon-bearing formation comprises an effective amount of a scale dissolver formulation and an effective amount of a surfactant for controlling the viscosity of the fluid. In use, formation hydrocar... | 03/18/2008 |
| 7337845 | Well maintenance equipment and procedure The present invention relates to a method of removing deposits from various types of wells (17) including environmental recovery, water supply, horizontal, barrier, injection, recharge, and/or disposal wells (17). The method includes equipping a well (... | 03/04/2008 |
| 7334635 | Methods for fracturing subterranean wells A method of forming a propped fracture comprising: providing a fracture having a far-well bore area and a near-well bore area; placing first proppant particulates at least partially coated with an adhesive substance; placing a portion of second proppant particulates... | 02/26/2008 |
| 7334636 | Methods of creating high-porosity propped fractures using reticulated foam One embodiment of the prevent invention provides a method of creating a high porosity propped fracture comprising creating a slurry comprising a treatment fluid, proppant particulates, pieces of reticulated foam having cells, and an adhesive substance such that the ... | 02/26/2008 |
| 7331388 | Horizontal single trip system with rotating jetting tool A method for completing a well in a single trip is described, which includes inserting a completion tool assembly into the wellbore. The completion tool assembly includes a gravel packing assembly having a central channel substantially therethrough and a service too... | 02/19/2008 |
| 7328756 | Settable fluids comprising particle-size distribution-adjusting agents and methods of use Settable fluids comprising particle-size distribution-adjusting agents, and methods of using such settable fluids in subterranean and surface applications are provided. In certain exemplary embodiments, the settable fluid comprises a cement, a set retarder, and a pa... | 02/12/2008 |
| 7328746 | Method and composition for forming protective precipitate on cement surfaces prior to formation acidizing treatment A method and composition for protecting cement surfaces in a well bore treatment zone from the destructive effects of acid mud and other acidization processes commonly used to stimulate hydrocarbon production from the formation, includes contacting the cement with a... | 02/12/2008 |
| 7322412 | Casing shoes and methods of reverse-circulation cementing of casing A method having the following steps: running a circulation valve comprising a reactive material into the well bore on the casing; reverse-circulating an activator material in the well bore until the activator material contacts the reactive material of the circulatio... | 01/29/2008 |
| 7322419 | Circulating sub and method A control sub for use with a hydraulically operated downhole tool. In an embodiment, the sub comprises an outer sleeve connected to a work string and an inner sleeve slidably engaged to the outer sleeve by matching hex profiles, connected to the downhole tool. Radia... | 01/29/2008 |
