Patent application number | Description | Published |
20130106096 | SEALING DEVICE FOR CONNECTING TWO PIPES | 05-02-2013 |
20130208845 | METHOD FOR FILLING WATER INTO A MAIN CIRCUIT OF A NUCLEAR REACTOR, AND CONNECTION DEVICE FOR IMPLEMENTING SAID METHOD - The method for filling water into and changing the air of a main circuit of a water-cooled nuclear reactor includes a step of placing a connection and fluid isolation device which is connected to a hot leg of each cooling loop of the main circuit so as to substantially insulate, from inside the vessel, the assembly of hot legs. The method also includes a step of injecting water through an injection circuit on at least one hot leg until each cooling loop is filled with water having changed the air from a steam generator and until the water level in the vessel reaches above the side openings of the vessel that correspond to the loops, after which the connecting device is taken out of the vessel. The connecting device is capable of using telescopic connection elements. | 08-15-2013 |
20130221661 | CONNECTING DEVICE TO BE CONNECTED TO AT LEAST ONE PIPE - A connecting device comprising at least a telescopic connecting system mounted on a carrier housing and capable of being actuated by an actuating mechanism for deployment and connection to a pipe. The telescopic connecting system is connected to a first portion of the actuating mechanism arranged inside the carrier housing and the actuating mechanism comprises a control rod crossing at least one wall of the carrier housing and connecting said first portion to a control system arranged on the outside of the carrier housing. | 08-29-2013 |
20150310949 | WATER INTAKE INSTALLATION FOR COOLING A NUCLEAR POWER PLANT, AND NUCLEAR POWER PLANT COMPRISING SUCH AN INSTALLATION - Water intake installation to supply water to a heat exchanger cooling circuit of one or more reactor units of a nuclear power plant, and comprising a suction basin from which a pumping station sucks water. The installation further comprises a suction tunnel communicating with the suction basin to supply it with water, connected to two water intakes submerged in a body of water. A part of the suction tunnel forms a loop having two ends that communicate with the suction basin. The disclosure also relates to a method for producing such a water intake installation, as well as a nuclear power plant comprising such an installation, optionally with several reactor units supplied with water by a same suction basin. | 10-29-2015 |
20150357064 | WATER INTAKE INSTALLATION FOR COOLING A NUCLEAR POWER PLANT, AND NUCLEAR POWER PLANT COMPRISING SUCH AN INSTALLATION - Water intake installation comprising a suction basin from which a pumping station supplies water to a cooling circuit, and a suction tunnel that supplies water to the suction basin so as to maintain a sufficient water level. The water intake installation furthermore comprises a system for supplying additional water, able to supply water to the suction basin from an emergency water reserve. The system for supplying additional water comprises a water duct connecting the suction basin to said emergency water reserve and an obstructing device able to open the water duct if the water level in the suction basin drops in a way defined beforehand as being abnormal. Nuclear power plant comprising such a water intake installation, especially suitable for establishment on a coastline vulnerable to tsunami flooding. | 12-10-2015 |
Patent application number | Description | Published |
20110305110 | SYSTEM AND METHOD FOR GENERATING TRUE DEPTH SEISMIC SURVEYS - A surface seismic survey is generated or obtained from Earth's surface and is based on time in which acoustic waves are reflected to Earth's surface. One or more tools measure density and sonic velocity of a subsurface formation. An estimate of acoustic impedance is obtained from the density and the sonic velocity to generate a synthetic seismic survey. The synthetic seismic survey and the surface seismic survey are compared and/or correlated. The acoustic impedance can be iteratively estimated until the synthetic seismic survey matches the surface seismic survey. Matching the surface seismic survey with the synthetic seismic survey may ensure that the surface seismic survey may be calibrated in actual depth. | 12-15-2011 |
20120095686 | Method and Apparatus for Removal of The Double Indication of Defects in Remote Eddy Current Inspection of Pipes - The apparatus employs the remote field eddy-current (RFEC) inspection technique to electromagnetically measure physical parameters of a metallic pipe. RFEC devices inserted into and displaced along a cylindrical pipes may be used to measure the ratio of pipe thickness to electromagnetic skin-depth and thus allow for the non-invasive detection of flaws or metal loss. Typically these RFEC thickness measurements exhibit a so-called double-indication of flaws, an undesired artifact due to a double-peaked geometrical sensitivity function of the device. The method describes a means by which this double indication artifact may be removed by an appropriate processing of RFEC measurements performed by an apparatus specifically designed for this purpose. The invention is particularly well designed for applications in the oilfield industry. | 04-19-2012 |
20120326723 | Apparatus and Method for Actively Balancing Impedance of A Resistivity Measuring Tool - An apparatus for making a resistivity measurement of an underground formation surrounding a borehole is provided. The apparatus includes a conductive tool body, at least one current injector electrode positioned between the tool body and a wall of the bore hole, at least one current return electrode positioned between the tool body and the wall of the bore hole, an electrical measurement device configured to monitor a voltage or a current signal indicative of an impedance imbalance, a regulator connected to the electrical measurement device, whereby the regulator is configured to receive the voltage or the current signal indicative of the impedance imbalance and is configured to generate an adjustment signal based on the voltage or the current signal indicative of the impedance imbalance. | 12-27-2012 |
20130080102 | Measuring The Phase Of Received Signals - The present disclosure relates to a method to determine the phase of a signal when transmitter and receiver circuits use separate clocks. A discrepancy between the separate clocks is determined, as is a correction factor between the separate clocks. The phase is determined using a measured time of arrival of the signal, the determined discrepancy, and the determined correction factor. A drift factor and an expected start time of a pulse sequence may be used to determine the discrepancy. A start time of a pulse within the pulse sequence is determined and used to determine the correction factor. The method works by either absolute synchronization of the separate clocks, or by making the measurements independent of clock synchronization. | 03-28-2013 |
20130181799 | Inductive Couplers for Use in A Downhole Environment - Inductive couplers for use in a downhole environment are described. An example inductive coupler for use in a downhole environment includes a body defining a cavity and magnetic material positioned in the cavity. The example inductive coupler also includes a coil adjacent the magnetic material, the coil formed with a number of turns of wire, and a first metal cover coupled to the body to enclose the cavity. The metal cover being electrically coupled to the body to form a substantially contiguous electrically conductive surface surrounding the cavity. | 07-18-2013 |
20130191028 | GAIN-CORRECTED MEASUREMENTS - A method to obtain gain-corrected measurements. A measurement tool having one or more arrays is provided, wherein the arrays include two co-located triaxial transmitters and two co-located triaxial receivers. Measurements are obtained using the transmitters and the receivers. Impedance matrices are formed from the obtained measurements and the impedance matrices are combined to provide gain-corrected measurements. The apparatus may alternatively be a while-drilling logging tool having one or more arrays, wherein each array comprises a transmitter, a receiver, and a buck, and wherein the signal received by the receiver is subtracted from the signal received by the buck or vice versa. A slotted shield may be incorporated into either embodiment of the tool. The slots may form one or more island elements. A material is disposed in the slots. The islands and shield body have complementary tapered sides that confine the islands within the shield body. | 07-25-2013 |
20150015265 | Look Ahead Logging System - A technique utilizes the acquisition of data from desired subterranean regions via a logging system. The logging system is constructed for use in a wellbore and comprises a transmitter module having a transmitter antenna. Additionally, the logging system utilizes a receiver module spaced from the transmitter module and having a receiver antenna. The transmitter antenna and the receiver antenna are oriented to enable sensitivity in desired directions, such as ahead of the logging system. | 01-15-2015 |
20150025807 | Methods for Determining Dielectric Permittivity Spectrum of Underground Rock Formations - Techniques involve determining the frequency-dependent dielectric permittivity spectrum of a rock sample. Determining the frequency-dependent dielectric permittivity may involve defining a series of electromagnetic measurement data having at least a measurement at a frequency from which a substantially frequency-independent value of dielectric permittivity ε | 01-22-2015 |
20150127274 | Method and Apparatus for Removal of The Double Indication of Defects in Remote Eddy Current Inspection of Pipes - The apparatus employs the remote field eddy-current (RFEC) inspection technique to electromagnetically measure physical parameters of a metallic pipe. RFEC devices inserted into and displaced along a cylindrical pipes may be used to measure the ratio of pipe thickness to electromagnetic skin-depth and thus allow for the non-invasive detection of flaws or metal loss. Typically these RFEC thickness measurements exhibit a so-called double-indication of flaws, an undesired artifact due to a double-peaked geometrical sensitivity function of the device. | 05-07-2015 |
20150233234 | Methods and Apparatus to Detect Fluid Distributions - A disclosed example method involves receiving a first signal transmitted into a reservoir from a production installation in a formation at a wellsite, and determining an apparent resistance of the reservoir based on the first signal. A distance between a fluid extraction tool and a fluid distribution is determined based on the apparent resistance. | 08-20-2015 |
20160070018 | Measurement Compensation Using Multiple Electromagnetic Transmitters - Systems, methods, and devices for compensating for environmental conditions on electromagnetic measurements are provided. For example, a downhole logging tool may include a first transmitter coil, a second transmitter coil, and a first receiver coil. The first transmitter coil may provide a first magnetic signal in a wellbore having a conductive casing. The second transmitter coil may provide a second magnetic signal in the wellbore. The first receiver may obtain a first measurement relating to the first magnetic signal and a second measurement relating to the second magnetic signal. The first receiver coil may be near enough to the first transmitter coil and the second transmitter coil to obtain measurements predominantly in the near field eddy current regime. A ratio of the first measurement and the second measurement may cancel environmental dependencies of the first receiver coil. | 03-10-2016 |
Patent application number | Description | Published |
20110042073 | GRAVITY INTERPRETATION WORKFLOW IN INJECTION WELLS - A method comprising: estimating a change in a characteristic of a subterranean formation into which a fluid has been injected via a well extending into the subterranean formation; building a multi-dimensional model balancing mass of the injected fluid, wherein the model is based on the estimated characteristic change; utilizing the model to determine the sensitivity of a borehole gravity tool in the well; measuring gravity with the borehole gravity tool at a plurality of stations along the well; and utilizing the model and the gravity measurements to locate the injected fluid in the subterranean formation. | 02-24-2011 |
20110215809 | DETECTION OF FORMATION STRUCTURES USING ELECTROMAGNETIC COUPLING MEASUREMENTS - The present disclosure relates to a method to determine a characteristic of a subsurface formation using electromagnetic coupling components. A downhole logging tool having one or more transmitters and one or more receivers, and being capable of measuring the electromagnetic coupling components is provided. The electromagnetic coupling components are measured using the downhole logging tool and used to form a 3-D Lateral Indicator and/or a 3-D Longitudinal Indicator. The 3-D Lateral Indicator and/or the 3-D Longitudinal Indicator are used to determine the characteristic of the subsurface formation. | 09-08-2011 |
20120188236 | System, Method and Apparatus for Visualizing Changes in Cylindrical Volumes - A method includes interpreting first dimensional data such as a caliper log for a wellbore at a first time, and interpreting second dimensional data such as a caliper log for the wellbore at a second time. The method further includes determining a dimensional differential in response to the first dimensional data and the second dimensional data. The dimensional differential includes a volume difference between cross-sectional profiles from the first dimensional data and the second dimensional data. The cross-sectional profiles for comparison may be at a specified axial location or range of axial locations in the wellbore. The method includes graphically displaying the dimensional differential by marking the dimensional differential with a first marker index where the first dimensional data is inside the second dimensional data, and with a second marker index where the first dimensional data is outside the second dimensional data. | 07-26-2012 |
20150112598 | Methods and Systems for Improving Interpretation of Formation Evaluation Measurements - The disclosure provides methods and systems for improving the interpretation of formation evaluation measurements. The methods involve using a downhole tool to measure a property of a formation at multiple depths of investigation and calculating a spatial integrated J function, a spatial integrated K function, or both from the measurements. The J function and K function are used in different applications to improve interpretation. The system includes a tool for measuring a formation property and a processor for calculating a spatial integrated J function, a spatial integrated K function from the measurements taken at different depths of investigation. The processor may also perform interpretations such as classifications, probability distributions and initialization steps for radial inversion using the J and K functions. | 04-23-2015 |