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| Number | Title | Issue Date |
| 7527103 | Procedures and compositions for reservoir protection A flow conduit having at least one orifice is placed in the vicinity of a flow source, which in one non-limiting embodiment may be a hydrocarbon reservoir. The flow pathway between the orifice and the source is temporarily blocked with a degradable barrier. Once the... | 05/05/2009 |
| 7527102 | Methods and compositions for diverting acid fluids in wellbores Viscoelastic surfactant (VES) gelled aqueous fluids containing a VES, an internal breaker, and optionally a viscosity enhancer are useful as diverting fluid for directing placement of an acid into a subterranean formation, where the acid is injected subsequent to in... | 05/05/2009 |
| 7520158 | Method and apparatus for reservoir characterization using photoacoustic spectroscopy A method and apparatus are provided that assess reservoir compartmentalization by determining whether there are compositional differences such as whether the isotopic ratios of carbon (13C/12C) or of oxygen (17O/18O) are the same or different in various parts of the... | 04/21/2009 |
| 7518950 | Method and apparatus for downlink communication The present invention provides a method and system in which signals from the surface are sent by changing flow rate of the drilling fluid supplied to the drill string during drilling of a wellbore. The signals are sent based on a fixed or dynamic time period schemes... | 04/14/2009 |
| 7516791 | Configurable wellbore zone isolation system and related systems An apparatus for providing zonal isolation in a wellbore includes a plurality of interlocking sealing elements having anchor elements at the opposing ends. Each anchor element sealingly engages a wellbore tubular whereas the interlocking sealing elements do not enga... | 04/14/2009 |
| 7503403 | Method and apparatus for enhancing directional accuracy and control using bottomhole assembly bending measurements A system for drilling a well comprises a tubular member having a bottomhole assembly at a bottom end thereof disposed in a wellbore. A first sensor is disposed in the bottomhole assembly at a predetermined axial location for detecting bending in a first axis and gen... | 03/17/2009 |
| 7487828 | Apparatus and method for powering electrical devices along a pipeline A drilling system comprises a tubular member disposed in a wellbore having a downhole assembly disposed therein. At least one electrical device is disposed in the downhole assembly. A fuel cell is disposed in the downhole assembly and operatively coupled to the elec... | 02/10/2009 |
| 7477161 | Bidirectional telemetry apparatus and methods for wellbore operations A system and method for communicating data between a downhole tool and a surface controller is provided that comprises a rotating drill string extending in a borehole and having a downhole telemetry module disposed proximate a bottom end thereof and transmitting a f... | 01/13/2009 |
| 7469750 | Expandable seal In one aspect, the present invention provides a sealing apparatus for use in a tubular member. In one embodiment, the sealing apparatus includes an expandable sleeve and an expandable a toroidal/ring-shaped seal. The seal seats within a circumferential saddle or gro... | 12/30/2008 |
| 7468402 | Polymeric nanoemulsion as drag reducer for multiphase flow Polymeric nanoemulsions facilitate flow and reduce drag and friction in multiphase pipelines containing both oil and water (e.g., oil/water, oil/water/gas, oil/water/solids, and oil/water/gas/solids) such as are used for oil or gas production, gathering, and transmi... | 12/23/2008 |
| 7464588 | Apparatus and method for detecting fluid entering a wellbore The method and apparatus of the present invention provides for detecting a flow of a formation fluid entering into a wellbore. An ultrasonic sensor is placed in a wellbore. The sensor has a resonant member that is exposed to a fluid in the wellbore. At a location in... | 12/16/2008 |
| 7464758 | Model HCCV hydrostatic closed circulation valve Devices and methods for methods for cleaning of excess cement from a production assembly as well as from the annulus surrounding the production assembly. A hydrostatic closed circulation valve (HCCV) assembly is described that is primarily actuatable between open an... | 12/16/2008 |
| 7461699 | Method for providing a temporary barrier in a flow pathway A flow conduit may have at least one orifice is in the vicinity of a flow source. The source is at least partially covered (and flow blocked by) an optional temporary coating or barrier. The flow pathway between the orifice and the source is temporarily blocked with... | 12/09/2008 |
| 7438809 | Single-cell mechanical flotation system A mechanical flotation system having only one cell may be nearly as efficient as one having two or more cells, yet provide an apparatus with a considerably smaller footprint, significantly reduced capital and operating costs, as well as be resistant to floating oil ... | 10/21/2008 |
| 7438877 | Fast, high capacity hydrogen sulfide scavengers Selective, irreversible removal of hydrogen sulfide (H2S) and other sulfhydryl compounds from a gas stream, such as sour natural gas and sour hydrocarbon liquids is achieved with a scavenging agent having hydroxyalkyl functionality and alkylamine function... | 10/21/2008 |
| 7416661 | Mechanical flotation device for reduction of oil, alkalinity and undesirable gases A mechanical vessel may effectively and simultaneously displace a first undesired gas from within water with a second desired gas, and remove at least one alkaline species and oily matter from the water. The vessel raises the pH of the water and reduces the lime req... | 08/26/2008 |
| 7393813 | Water-based drilling fluids using latex additives A water-based drilling fluid having a polymer latex capable of providing a deformable latex film on at least a portion of a subterranean formation has been discovered to provide reduced drilling fluid pressure invasion when used to drill in shale formations for hydr... | 07/01/2008 |
| 7388046 | Self-dispersing waxes as polymer suspension aids Polymer particles of ultrahigh molecular weight poly(alpha-olefins) may be made stable toward agglomeration by suspension within a co-suspension of self-dispersing waxes. This combination prevents polymer agglomeration over time while maintaining good flowability pr... | 06/17/2008 |
| 7368050 | Quantitative transient analysis of localized corrosion The invention provides an electrochemical noise method, apparatus and system for estimating parameters of interest related to corrosion rates of an electrically conductive article, the method comprising: placing a working electrode, a reference electrode, and a coun... | 05/06/2008 |
| 7354886 | Pumpable multiple phase compositions for controlled release applications downhole Pumpable multiple phase vesicle compositions carry agents and components downhole or through a conduit, and controllably releasing them at a different place and time by breaking the compositions. In one non-limiting embodiment the pumpable multiple phase vesicles ha... | 04/08/2008 |
| 7347266 | Use of mineral oils, hydrogenated polyalphaolefin oils and saturated fatty acids for breaking ves-gelled fluids Fluids viscosified with viscoelastic surfactants (VESs) may have their viscosities reduced (gels broken) by the direct or indirect action of a breaker composition that contains at least one mineral oil, at least one polyalphaolefin oil, and/or at least one saturated... | 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 |
| 7328745 | High molecular weight polyamine salts as clay stabilizing agents A clayish subterranean formation, such as may be encountered in rock surrounding a well bore during hydrocarbon recovery operations may be stabilized with relatively high molecular weight polyamine salts of an imide of polymaleic anhydride. The salts may be unneutra... | 02/12/2008 |
| 7314951 | Process and composition for lower toxicity quaternary ammonium compounds Betaine ester quaternary ammonium compounds with reduced toxicity and improved biodegradability are formed by esterification of a haloacetic acid with an alcohol containing at least 4 carbon atoms, followed by quaternization of the halo-acetate with a tertiary amine... | 01/01/2008 |
| 7299678 | Sensor apparatus A measurement head particularly for borehole use can measure multiple parameters with no electronics in the head and only a single conductor cable. Double-ended tuning forks (26, 28 and 38, 40) in the head are arranged to respond to different parameter... | 11/27/2007 |
| 7297278 | Methods for removing metals from water A device for separating metal components from a colloidal suspension or solution uses a vessel for holding the colloidal suspension or solution. A membrane impermeable to the selected metal components of a colloidal suspension or solution is sealed over a support to... | 11/20/2007 |
| 7288506 | Aluminum carboxylate drag reducers for hydrocarbon emulsions Aluminum carboxylate drag reducing agents are described herein. These materials are useful to reduce drag in hydrocarbon fluids and multiphase fluids of hydrocarbon(s) and water. No injection probes or other special equipment is expected to be required to introduce ... | 10/30/2007 |
| 7287540 | Method for introducing drag reducers into hydrocarbon transportation systems Disclosed is a method of reducing drag in a fluid stream. The method includes admixing the components of a drag reducer to form an incipient drag reducer and injecting the incipient drag reducer into the fluid stream wherein the drag reducer components are admixed a... | 10/30/2007 |
| 7284610 | Polyamine salts as clay stabilizing agents A clayish subterranean formation, such as may be encountered in rock surrounding a well bore during hydrocarbon recovery operations may be stabilized with a polyamine salt of an imide of polymaleic anhydride. The salt may be unneutralized or partially neutralized. T... | 10/23/2007 |
| 7256160 | Fracturing fluids for delayed flow back operations It has been discovered that certain fracturing fluid compositions can be used to fracture a subterranean formation and be permitted to stay within the formation for a relatively extended period of time, for example 28 days or more, before being flowed back or produc... | 08/14/2007 |
| 7228896 | Ribbed sealing element and method of use A device for sealing and anchoring within a tubular member. The device comprises a top swage member disposed within the tubular member, with the top swage member having a longitudinal center of axis. Also included is a first sealing member disposed about the top swa... | 06/12/2007 |
| 7214933 | Method and apparatus for a downhole fluorescence spectrometer The invention comprises an apparatus and method for simple fluorescence spectrometry in a down hole environment. The apparatus and method utilization of two UV light bulbs and an optically clear UV coupler and a fluid containment system. The optically clear UV coupl... | 05/08/2007 |
| 7208529 | Aminocarboxylic acid breaker compositions for fracturing fluids It has been discovered that aminocarboxylic acids are effective breakers for polymer-gelled aqueous fracturing fluids, particularly in the temperature range between about 120° F. (49° C.) and about 280° F. (138° C.). The aminocarboxylic acids are believed to act... | 04/24/2007 |
| 7207216 | Hydraulic and mechanical noise isolation for improved formation testing An apparatus and method for isolating a downhole tool section from hydraulic and mechanical noise. Anchoring grippers are used in conjunction with a fluid diverter valve to anchor the tool section to a borehole wall and divert fluid flowing in the drill string away ... | 04/24/2007 |
| 7160842 | Polyols for breaking of fracturing fluid It has been discovered that fracturing fluid breaker mechanisms are improved by the inclusion of a polyol alone that directly degrades the polysaccharide backbone, and optionally additionally by removing the crosslinking ion, if present. That is, viscosity reduction... | 01/09/2007 |
| 7137401 | Drag reduction using maleated fatty acids Non-polymeric drag reducing agents in the form of maleated fatty acids and the esters thereof and the organic, inorganic or amine salts thereof are described herein. These additives are useful to reduce drag in hydrocarbon fluids and multi-phase fluids of hydrocarbo... | 11/21/2006 |
| 6993433 | Modeling gravity and tensor gravity data using poisson's equation for airborne, surface and borehole applications The present invention is a method for determining a parameter of interest of a region of interest of the earth. At least one component of potential fields data is measured at a plurality of locations over a region of interest including a subterranean formation of in... | 01/31/2006 |
