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| Number | Title | Issue Date |
| 7942214 | Steerable drilling system A steerable drilling system comprises a rotary drill bit 14 secured to a housing 16, a secondary rotary drill component 22 carried by the housing and rotatable therewith, the second rotary drill component 22 having a gauge dimension great... | 05/17/2011 |
| 7931091 | Open-hole wellbore lining Embodiments of the present invention provide systems and methods for lining a wellbore. In certain aspects, the systems and methods comprise providing a fluid composition that is solidifiable or gellable on exposure to actinic radiation of a predetermined wavelength... | 04/26/2011 |
| 7928672 | Modulator for circular induction accelerator Described herein is a modulator circuit for generating discrete energy pulses in a device. The circuit includes a high voltage power source intermittently coupled to a saturable first inductor, a second inductor and a capacitor coupled in parallel between the high v... | 04/19/2011 |
| 7926592 | Steerable drilling system A steerable drilling system including a bias unit and a separator. The separator is arranged to remove particulate matter from the supply of pressurized drilling mud to the actuator of the bias unit. The separator includes a hydrocyclone located upstream of the actu... | 04/19/2011 |
| 7926562 | Continuous fibers for use in hydraulic fracturing applications Methods and related systems are described for use with hydraulic fracturing and other oilfield applications. A tool body is positioned in a wellbore at a location near a subterranean rock formation being fractured. The tool body contains a plurality of deployable co... | 04/19/2011 |
| 7926438 | Subsea operations support system An underwater operations support system facilitates underwater exploration, monitoring, maintenance and construction operations associated with development of natural resources. The operations support system may include energy generation subsystems, energy accumulat... | 04/19/2011 |
| 7916838 | Betatron bi-directional electron injector A Betatron having a toroidal passageway disposed in a cyclical magnetic field with a main electron orbit circumnavigating the toroidal passageway. Within the toroidal passageway is a first electrode that is spaced apart from a second electrode. The combination of th... | 03/29/2011 |
| 7916041 | Hole depth sensing A method of sensing and transmitting hole depth information comprises monitoring, at the surface, the extension of the hole as drilling progresses, determining when the hole depth has extended by a predetermined distance, and sending an increment signal to a telemet... | 03/29/2011 |
| 7913806 | Enclosures for containing transducers and electronics on a downhole tool A measurement package for disposal on an apparatus such as a downhole tool or a tool like device. The measurement package including an enclosure, a first acoustic transducer housed within the enclosure, a second acoustic transducer housed within the enclosure and el... | 03/29/2011 |
| 7909099 | Well productivity enhancement methods The invention relates to oil production stimulation methods and can be used for both reservoirs with fractures resulting from the fracturing procedure and reservoirs with naturally occurring fractures, for which the fracturing procedure is not mandatory. A material ... | 03/22/2011 |
| 7908930 | Systems and methods for measuring multiphase flow in a hydrocarbon transporting pipeline This disclosure relates in general to methods and systems for measuring multiphase flows in a pipeline using a combination of venturi, microwave and radiation techniques, where the pipeline is configured to transport hydrocarbons. More specifically, but not by way o... | 03/22/2011 |
| 7906861 | Harvesting energy in remote locations Electrical energy is produced at a remote site by converting kinetic energy from the environment. The kinetic energy may include vibrations and flow of fluid. In some embodiments the kinetic energy causes magnets to move with respect to coils in order to produce ele... | 03/15/2011 |
| 7902496 | Method of determining petro-physical information with high energy gamma rays Methods for density logging utilizes gamma-rays above a pair-production threshold so as to determine lithology information of formations whereby to correct a measured density data. ... | 03/08/2011 |
| 7901555 | Electro-chemical sensor An electro-chemical sensor is described having two molecular redox systems sensitive to the same species and having an detector to detect relative shifts in the voltammograms of the two redox systems. ... | 03/08/2011 |
| 7896628 | Downhole motor seal and method The rotor of a downhole motor includes a mandrel having at least one radial lobe, and an elastomeric tubular sleeve compressed about the mandrel so as to establish frictional engagement therebetween. The sleeve is compressed about the mandrel through one of various ... | 03/01/2011 |
| 7896086 | Logging tool deployment systems and methods without pressure compensation Systems and processes are provided for safely facilitating transfer of down-hole devices through an adaptive seal assembly capping a well under pressure. At least one dynamic seal is provided having a size and shape to accommodate varying cross section of an elongat... | 03/01/2011 |
| 7894891 | Diffusion-based magnetic resonance methods for characterizing bone structure A method of in vitro or in vivo nuclear magnetic resonance and/or magnetic resonance imaging, to determine bone properties by measuring the effects of molecular diffusion inside the bone specimen to derive parameters that are related to the structure of the trabecul... | 02/22/2011 |
| 7894298 | Multi-component seismic data processing There is described a method of moveout or velocity analysis of seismic signals using the steps of obtaining such signals 5 from a plurality of receivers, identifying receiver functions within the acoustic signals, analyzing said receiver functions for velocit... | 02/22/2011 |
| 7891417 | Completion apparatus for measuring streaming potentials and determining earth formation characteristics Earth formations are characterized by using an array of electrodes which can measure streaming potentials in the formation, and by interpreting the data obtained by the electrodes. The electrodes are placed on a wireline tool, a LWD tool, or in a fixed manner about ... | 02/22/2011 |
| 7886825 | Formation fluid sampling tools and methods utilizing chemical heating A formation fluid sampling tool is provided with reactants which are carried downhole and which are combined in order to generate heat energy which is applied to the formation adjacent the borehole. By applying heat energy to the formation, the formation fluids are ... | 02/15/2011 |
| 7886591 | Method for improving the determination of earth formation properties Methods and apparatus for improving the determination of at least one multiphase flow parameter of an earth formation comprising propagating within the formation a first salinity front, determining a first value of the at least one multiphase flow parameter, propaga... | 02/15/2011 |
| 7845430 | Compliantly coupled cutting system A drill bit system for a drilling assembly is disclosed. The drill bit system may include a chassis, a head, and a first plurality of gauge pads. The head may include a first plurality of cutters coupled with an end of the head, and the head may be movably coupled w... | 12/07/2010 |
| 7874362 | Determination of downhole pressure while pumping Tubewaves are used to transmit an indication of the depth at which a condition is detected in a well. In particular, the depth is calculated based on the difference in arrival time at the surface of a first tubewave which propagates directly upward in the borehole a... | 01/25/2011 |
| 7872944 | Method of monitoring microseismic events A microseismic method of monitoring fracturing operation or other passive seismic events in hydrocarbon wells is described using the steps of obtaining multi-component s-wave signals of the event; and using a linear derivative of S-wave arrival times of the signals ... | 01/18/2011 |
| 7869565 | Classification method for sedimentary rocks A method of determining a parameter of interest of reservoir rock formation is described using the steps of measuring an x-ray attenuation or absorption distribution of a sample of said rock formation, identifying the mineral phase part of said distribution, and sub... | 01/11/2011 |
| 7863901 | Applications of wideband EM measurements for determining reservoir formation properties A method for determining reservoir formation properties that consists of exciting the reservoir formation with an electromagnetic exciting field, measuring an electromagnetic signal produced by the electromagnetic exciting field in the reservoir formation, extractin... | 01/04/2011 |
| 7858563 | Wellbore treatment with hydrocarbon-responsive fluid containing oligomeric viscoelastic surfactant A treatment of a subterranean formation which contains a hydrocarbon-bearing zone, is carried out using a hydrocarbon-responsive fluid thickened with an oligomeric surfactant consisting of from 2 to 8_linked surfactant monomer subunits. The process of treatment comp... | 12/28/2010 |
| 7858562 | Powder composition A powder composition comprising viscoelastic surfactant forms, in aqueous solution, a viscoelastic wellbore treatment fluid. ... | 12/28/2010 |
| 7858561 | Degradable polymers for wellbore fluids and processes A viscosifying agent for wellbore fluids is described including a polymer polymerized using at least two pre-polymers “A” and “B”, the polymer being capable of essentially fully degrading into soluble fragments after the initiation of a breaking process.... | 12/28/2010 |
| 7857049 | System and method for operational management of a guarded probe for formation fluid sampling Embodiments of the present invention relate to systems and methods for real-time management of a guarded probe device down a wellbore that is being used for formation fluid sampling. More specifically, but not by way of limitation, embodiments of the present inventi... | 12/28/2010 |
| 7852708 | Sensing and actuating in marine deployed cable and streamer applications Methods and related systems are described for use with hydraulic fracturing and other oilfield applications. A tool body is positioned in a wellbore at a location near a subterranean rock formation being fractured. The tool body contains a plurality of deployable co... | 12/14/2010 |
| 7852087 | Removing effects of near surface geology from surface-to-borehole electromagnetic data A method that involves developing an electromagnetic property model of a near surface area and using this electromagnetic property model and electromagnetic data acquired using one or more electromagnetic transmitters located above the near surface area and one or m... | 12/14/2010 |
| 7852077 | Nuclear magnetic resonance measurement techniques in non-uniform fields Methods and pulse sequences for facilitating nuclear magnetic resonance (NMR) measurements in grossly inhomogeneous fields. Methods and pulse sequences according to the invention may be used to accurately measure variables such as transverse relaxation time, longitu... | 12/14/2010 |
| 7849939 | Drill bit The present invention recites a drill bit comprising a main body having an axis about which it is rotated in use, a cutting face, a connecting means for attaching the bit to a source of rotary motion, a gauge region intermediate said cutting face and the connecting ... | 12/14/2010 |
| 7849935 | System and method for drilling wellbores A system and method are provided for drilling a wellbore. The wellbore is formed with a drilling tool that cuts through a formation. A pumping system removes cuttings from the drilling tool and also transports the cuttings along at least a portion of the wellbore fo... | 12/14/2010 |
| 7836975 | Morphable bit A bottom hole assembly for drilling a cavity including a chassis configured to rotate is provided. The chassis may include a conduit, a circuit, a pressure transfer device, a plurality of pistons, a plurality of valves, and a plurality of cutters. The conduit may ac... | 11/23/2010 |
| 7835003 | Optical pH sensor An optical sensor for pH is described using a cross-linked network of bisilanes to immobilize a pH sensitive chromophore to a surface potentially exposed to a high pressure, high temperature environment such as wellbore effluents at a downhole location. ... | 11/16/2010 |
| 7832488 | Anchoring system and method An anchoring module capable of being secured within a structure includes at least one compliant ring configured to radially expand and an expandable device positioned within the compliant ring to expand the compliant ring from a relaxed state to interface with the s... | 11/16/2010 |
| 7828082 | Methods and apparatus for attenuating drillstring vibrations Apparatus and methods are described for highly attenuating vibrations of a drillstring assembly while drilling. In one embodiment, vibrations are attenuated by introducing one or more vibration attenuation modules at appropriate assembly locations. For example, vibr... | 11/09/2010 |
| 7819666 | Rotating electrical connections and methods of using the same This invention provides rotating electrical connections and methods of using the same. One aspect of the invention provides a rotating electrical connection. The rotating electrical connection includes: a rotary member and a pin. The rotary member includes a contact... | 10/26/2010 |
