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| Number | Title | Issue Date |
| 7845416 | Hydraulic sleeve valve with position indication, alignment, and bypass A hydraulic sleeve valve that includes a valve position indication system that provides an indication that the valve has reached a predetermined position, such as, for example, the fully opened or fully closed condition. The hydraulic sleeve valve may include a bypa... | 12/07/2010 |
| 7798085 | Apparatus, systems and methods for disconnecting an elongated member extending from a waterborne vessel In some embodiments, apparatus for disconnecting at least one elongated member extending between a waterborne vessel and at least one other object includes a cable extendable between the waterborne vessel and the other object. When the distance between the waterborn... | 09/21/2010 |
| 7743674 | High temperature fluid test instrument An apparatus that can determine the water wettability of fluid at simulate downhole conditions. For example, a spacer fluid and a drilling mud mixture can be tested under a specified pressure and a specified temperature that simulate downhole conditions. Additionall... | 06/29/2010 |
| 7735556 | Method of isolating open perforations in horizontal wellbores using an ultra lightweight proppant An improved method for building a plug in a horizontal wellbore using a fluid pill pumped into the wellbore at the end of a fracturing treatment. The fluid pill includes a high concentration of an ultra lightweight proppant, such as a neutrally buoyant proppant or a... | 06/15/2010 |
| 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 |
| 7718582 | Method for treating subterranean formation with enhanced viscosity foam A method for treating a subterranean formation by introducing into a gas or oil well a stable foam well treatment fluid which exhibits high viscosity. The well treatment fluid is prepared by first forming a mixture of crosslinking agent and foaming agent and then in... | 05/18/2010 |
| 7713918 | Porous particulate materials and compositions thereof Methods and compositions useful for subterranean formation treatments, such as hydraulic fracturing treatments and sand control that include porous materials. Such porous materials may be selectively configured porous material particles manufactured and/or treated w... | 05/11/2010 |
| 7713917 | Thermal insulation compositions containing organic solvent and gelling agent and methods of using the same A thermal insulating composition containing an organic solvent of low thermal conductivity and a gelling agent hydratable in the solvent is useful for controlling heat transfer from a production tubing or transfer pipe in a wellbore to a surrounding annuli and/or th... | 05/11/2010 |
| 7712533 | Method for treating a subterranean formation with water-in-oil emulsion The permeability of a subterranean formation is improved by introducing into the formation a water-in-oil emulsion. Unwanted particulates deposited in the formation during the production of oil are dissolved or loosened by the outer phase of the emulsion and dispers... | 05/11/2010 |
| 7704927 | Method of acid fracturing a sandstone formation Methods and compositions useful in acidizing a subterranean formation with an oil-in-water emulsion that includes a sulfonate ester, a fluoride salt, a proppant, and water. The reaction of the ester and fluoride salt is delayed so that hydrofluoric acid is produced ... | 04/27/2010 |
| 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 |
| 7694740 | Communication tool and method for a subsurface safety valve with communication component A communication tool apparatus is described which is adapted to provide selective communication of control fluid through a downhole device such as a safety valve. The downhole safety valve is a tubing retrievable subsurface safety valve (“TRSSSV”). The communica... | 04/13/2010 |
| 7690426 | Method of repairing failed gravel packs The invention is directed to controlling sand production in an oil and/or gas well. A preferred embodiment of the invention is directed to repairing a downhole screen by pumping neutrally buoyant resin coated material into a damaged portion of a gravel pack screen a... | 04/06/2010 |
| 7690097 | Methods of assembling well screens In some embodiments, methods for securing a cylindrical screen jacket to a base pipe include heating the screen jacket to expand it so that its inner diameter becomes greater than the outer diameter of the base pipe, positioning the base pipe at least partially with... | 04/06/2010 |
| 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 |
| 7681645 | System and method for stimulating multiple production zones in a wellbore A system and method for selectively stimulating a plurality of producing zones of a wellbore in oil and gas wells, the system being cemented within the wellbore. The system includes a plurality of modules connected in a string wherein the modules can be selectively ... | 03/23/2010 |
| 7678281 | Method of reclaiming brine solutions using an organic chelant A method of reclaiming a well completion brine solution containing metal impurities by introducing to the brine solution an organic chelant of the formula: and may be either a neutral compound, a corresponding salt, or a co... | 03/16/2010 |
| 7677322 | System and method for a low drag flotation system A low drag flotation system for placing screens in horizontal wells is provided which includes a screen exterior to the washpipe to be placed for sand control, and hydraulically actuated valves for trapping air within the washpipe. The air in the washpipe creates a ... | 03/16/2010 |
| 7674384 | Method of reclaiming brine solutions using an organic chelant A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group —CO2 | 03/09/2010 |
| 7669655 | Method of fracturing a subterranean formation at optimized and pre-determined conditions Prior to a hydraulic fracturing treatment, the estimated fracture length may be estimated with knowledge of certain physical properties of the proppant and transport fluid such as fluid viscosity, proppant size and specific gravity of the transport slurry as well as... | 03/02/2010 |
| 7665528 | Frangible flapper valve with hydraulic impact sleeve and method of breaking A frangible flapper valve that may be closed to hydraulically isolate a portion of a wellbore tubular. The flapper valve is made of a frangible material adapted to shatter upon impact from an impact sleeve. The sleeve may be used to initially hold open the flapper v... | 02/23/2010 |
| 7665521 | Safety cement plug launch system A system and method for using a pneumatic line to automate the launch a cement plug from a cement head. The pneumatic line is in communication with the valves and retaining devices normally found on a typical cement head. The system ensures that the proper sequence ... | 02/23/2010 |
| 7655096 | 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... | 02/02/2010 |
| 7647970 | Self-sealing well cement composition A cement composition is provided including a cement and a low reactivity particle coated with a swellable polymeric material. The low reactivity particle is coated with a swellable polymeric material at a concentration of about 10 weight percent to about 50 weight p... | 01/19/2010 |
| 7640748 | System and method of cooling steam turbines A system and method of cooling a steam turbine having internal moving components to a predetermined temperature by controlling a flow of nitrogen through the turbine, thus decreasing the downtime associated with maintaining the turbine. This provides a more efficien... | 01/05/2010 |
| 7638468 | Surfactant based viscoelastic fluids The invention relates to surfactant based viscoelastic fluids for enhancing the productivity of a hydrocarbon-bearing formations, such as oil wells. The viscoelastic fluids of the invention have particular applicability in acid fracturing of subterranean formations ... | 12/29/2009 |
| 7625845 | Method of using thermal insulation fluid containing hollow microspheres A thermal insulating fluid contains microspheres of hollow spherical particulates. The presence of the hollow spherical particles improves the thermal insulating properties of the fluid by imparting to the thermal insulating fluid a low heat transfer coefficient. Th... | 12/01/2009 |
| 7624805 | Method of inhibiting corrosion in a conduit Corrosive effects arising during oilfield treatment applications are inhibited and/or prevented by introducing into an oil or gas well at least one compound of formula I: wherein: R1 ... | 12/01/2009 |
| 7622429 | Non-emulsifying anti-sludge composition for use in the acid treatment of hydrocarbon wells A composition for inhibiting or preventing the formation of emulsions and asphaltic sludges in the presence of treating acids during the acid stimulation of hydrocarbon wells is provided. The composition includes an alkyl aryl sulfonic acid or salt thereof, an acety... | 11/24/2009 |
| 7618926 | Method of foaming saturated or near saturated brines with synergistic mixtures A synergistic blend for foaming concentrated brines comprises at least one foaming agent (in an amount between from about 10 to about 90 weight percent of the blend) and a compound of the formula: CnH2n+1—N—[(CH2)m... | 11/17/2009 |
| 7603896 | Fluid flow model and method of using the same A fluid flow model is comprised of one cross-flow style core holder and a multitude of standard style core holders, all connected by a concurrent combination of serial and parallel flow paths. The sum of these flow paths yields a fluid flow model that closely approx... | 10/20/2009 |
| 7600572 | Drillable bridge plug A method and apparatus for use in a subterranean well is described. The apparatus typically includes a mandrel and a packing element. The mandrel may have an outer surface and a non-circular cross-section and the packing element may be arranged about the mandrel, th... | 10/13/2009 |
| 7598209 | Porous composites containing hydrocarbon-soluble well treatment agents and methods for using the same Composites containing a hydrocarbon-soluble well treatment agent may be supplied to a well using a porous particulate. Such well treatment agents may for example inhibit the formation of paraffins, salts, gas hydrates, asphaltenes and/or other deleterious processes ... | 10/06/2009 |
| 7572757 | Method of treating a well with a gel stabilizer The present invention relates to the use of chalcogen heterocyclic electron donating compounds as thermal decomposition reduction additives for gels used in well treatment fluids such as drilling fluids, fracturing fluids, and well completion and workover fluids. | 08/11/2009 |
| 7562909 | Composite low cycle fatigue coiled tubing connector A coiled tubing connector having a body and a plurality of entry or transition sections connected to the body wherein the connector has a low cycle fatigue life of at least 30%, more preferably at least 50% of the coiled tubing. A preferred embodiment contains two s... | 07/21/2009 |
| 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 |
| 7543647 | Multi-zone, single trip well completion system and methods of use An improved well completion system for completing two or more separate production zones in a well bore during a single downhole trip is disclosed. The improved completion system comprises a completion assembly comprising two or more production zone assemblies and a ... | 06/09/2009 |
| 7528096 | Structured composite compositions for treatment of subterranean wells A structured composite is comprised of particulates having particle size distribution of at least two modes and a binder. The particle size distribution is preferably bi-modal or tri-modal. The composite may further contain a density-modifying agent for modifying th... | 05/05/2009 |
| 7520336 | Multiple dart drop circulating tool A downhole device used to divert fluid flow out of a work string. The downhole device may be located at any point along a work string at which it may be necessary to divert the fluid flow to the annulus. The downhole device may be activated and deactivated by insert... | 04/21/2009 |
| 7520333 | Hydraulic sleeve valve with position indication, alignment, and bypass A hydraulic sleeve valve is disclosed that comprises a bypass relief system that provides an indication that the valve has reached a predetermined position, such as, for example, the fully opened or fully closed condition. The bypass relief may also provide a valve ... | 04/21/2009 |
