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| Number | Title | Issue Date |
| RE41829 | Nonlinear electroseismic exploration A method for seismic exploration using nonlinear conversions between electromagnetic and seismic energy, with particular attention to the electromagnetic source waveform used. According to the invention, seismic returns from a source waveform are correlated with a r... | 10/19/2010 |
| 7474101 | Method for combined transient and frequency domain electromagnetic measurements A method for interpreting transient electromagnetic survey data includes imparting an electromagnetic field in the Earth's subsurface by passing electric current through a transmitter antenna. The electric current includes switched direct current at a selected switc... | 01/06/2009 |
| 7439977 | Method of displaying three-dimensional vector orientations on a two-dimensional surface A method for generating, displaying and manipulating the orientation of three-dimensional vectors on a two-dimensional surface for visualization, statistical analysis and correlation. The method involves collecting vector data, transforming each vector into spherica... | 10/21/2008 |
| RE40475 | Source waveforms for electroseismic exploration A method for seismic exploration using conversions between electromagnetic and seismic energy, with particular attention to the electromagnetic source waveform used. According to the invention, source waveforms are correlated with reference waveforms selected to min... | 09/02/2008 |
| 7411512 | Tracking the geographic location of an animal Systems and techniques for tracking the geographic location. In one aspect, a method includes receiving timed magnetic field information descriptive of a magnetic field to which a magnetometer was subject, the magnetic field information having been collected while t... | 08/12/2008 |
| 7367269 | Blast movement monitor and method for determining the movement of a blast movement monitor and associated rock as a result of blasting operations A method for measuring the movement of boundaries between different portions of a heterogeneous rock body is disclosed. The method comprises placing a plurality of blast movement monitors 109 in a rock body prior to blasting and noting the position of each bl... | 05/06/2008 |
| 7363160 | Technique for determining properties of earth formations using dielectric permittivity measurements Techniques for determining formation characteristics use measurements of dielectric permittivity at a number of frequencies. Determined characteristics include the vertical and horizontal formation dielectric constant and conductivity, the formation water conductivi... | 04/22/2008 |
| 7340348 | Method for acquiring and interpreting seismoelectric and electroseismic data A method for subsurface Earth surveying includes acquiring seismic data over a selected region of the Earth's subsurface. Seismoelectric data are acquired over a selected region of the Earth's subsurface. Electroseismic data are also acquired over a selected region ... | 03/04/2008 |
| 7333893 | Method for spatially interpreting electromagnetic data using multiple frequencies Method for removing effects of shallow resistivity structures in electromagnetic survey data to produce a low frequency resistivity anomaly map, or alternatively imaging resistivity structures at their correct depth levels. The method involves solving Maxwell's elec... | 02/19/2008 |
| 7330790 | Method of seismo electromagnetic detecting of hydrocarbon deposits A method of seismo electromagnetic detecting of hydrocarbon deposits has the steps of simultaneously initiating an electromagnetic field and a seismic wave in investigated geological region so that an electromagnetic signal originates by vibrating of hydrocarbon dep... | 02/12/2008 |
| 7326015 | Electrically insulated wedge thread connection An electrically-insulative threaded connection includes a pin member having a pin thread and a box member having a box thread. An insulating composite layer is disposed between the pin thread and the box thread. The insulating composite layer includes an insulating ... | 02/05/2008 |
| 7301345 | While-drilling methodology for estimating formation pressure based upon streaming potential measurements Logging-while-drilling apparatus and methodologies for measuring streaming potential in an earth formation are provided. The apparatus and methodologies can be utilized to find information relevant to the drilling operations. In particular, since the streaming poten... | 11/27/2007 |
| 7298869 | Multispectral data acquisition system and method A portable multispectral data acquisition system for use on a vehicle such as an aircraft comprises a plurality of gyroscope-stabilized remote sensing devices synchronized to simultaneously capture images of a common spatial area in both visible and invisible bands ... | 11/20/2007 |
| 7280919 | Earthquake prediction method and system thereof Vehicles or ships each carry a magnetic force line sensor, a GPS position detector, and a data transmitter and travel within an observation area transmitting magnetic field data and position data to an earthquake prediction center. A telluric current induction field... | 10/09/2007 |
| 7280920 | Method and apparatus for forecasting earthquakes and making informed risk management decisions A data-driven method and system to forecast earthquakes worldwide over a broad range of time (from days to years in advance). The system includes the compilation of a diverse set of historical geophysical and environmental databases, a program that determines correl... | 10/09/2007 |
| 7272503 | Method and apparatus for measuring formation conductivities from within cased wellbores by combined measurement of casing current leakage and electromagnetic response A method for determining spatial distribution of resistivity of Earth formations surrounding a wellbore having a conductive pipe therein includes measuring resistivity of the Earth formations using measurements of current leakage along the pipe at selected axial pos... | 09/18/2007 |
| 7262678 | Magnet system and MRI system With a view to providing a magnet apparatus which can form a medium magnetic field with use of permanent magnets, the magnet apparatus having a pair of parallel disc-like permanent magnets with magnetic poles of mutually opposite polarities opposed to each other thr... | 08/28/2007 |
| 7259564 | Method and device for determining the position of an interface in relation to a bore hole The invention concerns a method for determining the position, in a formation (1) containing at least one electrolytic liquid, of an interface (6) in relation to a bore hole (2). One stimulates at a first instant the interface (6) with an ... | 08/21/2007 |
| 7248052 | Electric power grid induced geophysical prospecting method and apparatus A geophysical prospecting method and apparatus that utilizes the harmonics and sub harmonics waves induced into the earth by the electric power grid. The amplitude-frequency data are converted to amplitude-depth data and further converted to a differential curve. Th... | 07/24/2007 |
| 7243718 | Methods for locating formation fractures and monitoring well completion using streaming potential transients information 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 ... | 07/17/2007 |
| 7242191 | Cold mass support structure and helium vessel of actively shielded high field open MRI magnets An open magnetic resonance imaging (MRI) device is provided with at least one main coil for generating a magnetic field for imaging a volume, and at least one shaping coil. The at least one shaping coil is positioned relative to the at least one main coil to shape t... | 07/10/2007 |
| 7236886 | Multiscale multidimensional well log data inversion and deep formation imaging method Different subsets of multiarray resistivity measurements are inverted using a corresponding resistivity model. The models are selected based at least in part on the resolution of the measurements. Results of the inversion are combined to give a single model consiste... | 06/26/2007 |
| 7233150 | While-drilling 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 ... | 06/19/2007 |
| 7230552 | Temperature compensation apparatus, systems, and methods In some embodiments, apparatus and systems, as well as methods, may include providing an analog temperature output responsive to a combination signal comprising a combination of an analog compensation output and a reference signal, and converting the analog temperat... | 06/12/2007 |
| 7227362 | Electric power grid induced geophysical prospecting method and apparatus An underground prospecting method and apparatus that utilizes the harmonics and fractional harmonic waves induced into the earth by the electric power grid. The data are converted to amplitude-depth and phase-depth data. The resulting data may be plotted and are com... | 06/05/2007 |
| 7222020 | System and method for determining oil or mineral deposits A system and method determines the probability of oil or mineral deposits. At least one data collection device collects elevation slope, magnetic and gravity data sets for a predetermined area of the earth's surface. A processor receives the elevation slope, magneti... | 05/22/2007 |
| 7218244 | Common interface architecture for horizontal directional drilling machines and walk-over guidance systems A system and method of interfacing a drilling machine with one of a number of different walk-over guidance systems involves receiving an ID signal from a particular walk-over guidance system selected for use with the drilling machine. A protocol library associated w... | 05/15/2007 |
| 7211550 | Compositions for controlling scaling and completion fluids An aqueous-based composition containing cesium formate and at least one chelating agent is described. Methods of removing scaling deposits, which may include alkaline earth metal sulfates, present on surfaces, including porous media, such as alkaline earth metal sul... | 05/01/2007 |
| 7202671 | Method and apparatus for measuring formation conductivities from within cased wellbores by combined measurement of casing current leakage and electromagnetic response A method is disclosed for determining spatial distribution of resistivity of Earth formations surrounding a wellbore having a conductive pipe therein. The method includes measuring resistivity of the Earth formations using measurements of current leakage along the p... | 04/10/2007 |
| 7183771 | Multiple transmitter and receiver well logging device with error calibration system including calibration injection system A device and method for obtaining an electromagnetic propagation measurement of a subterranean geologic formation, with the formation being intersected by a borehole. The device comprises a transmitter for transmitting an electromagnetic signal, and a first and seco... | 02/27/2007 |
| 7167006 | Method for measuring transient electromagnetic components to perform deep geosteering while drilling A transverse induction transmitter on an instrument induces currents in an earth formation when it is pulsed. Transient measurements made at transverse and axial receivers are used for determination of a distance to a bed boundary. This may be used to control the dr... | 01/23/2007 |
| 7148693 | Process and device for prospecting a porous geological formation A porous geological formation contains electrolytic fluid. During the geophysical prospecting of the formation, a region of interest of the formation where the electrolytic fluid is found is stimulated with an excitation signal. The excitation signal corresponds to ... | 12/12/2006 |
| 7141981 | Error correction and calibration of a deep reading propagation resistivity tool A resistivity logging tool suitable for downhole use includes a transmitter, two spaced apart receivers. The measured resistivities at the two receivers are corrected for differences in receiver characteristics based on measuring the responses of the receivers to a ... | 11/28/2006 |
| 7117093 | Method, media, and signals for processing seismic data to obtain a velocity field A method and apparatus for estimating a seismic velocity field from seismic data including time-amplitude representations associated with source-receiver locations spaced apart by an offset distance and having a midpoint therebetween, the seismic data being arranged... | 10/03/2006 |
| 7106076 | Device for the simultaneous application of electrical signals and measurement of the electrical potential in a sample An electrode, in the form of a spike, for insertion into a sample, has a large-area jacket adapted for applying an excitation current to the sample and a small-area tip electrically decoupled from the jacket, at which a potential measurement is made. ... | 09/12/2006 |
| 7106194 | Method for metal object identification using a three-dimensional steerable magnetic field antenna A method for identifying a buried metal object using a three-dimensional steerable magnetic field (3DSMF) system. The method comprises generating a magnetic field vector (MFV) at a first MFV position above the buried metal object; measuring a time decay response at ... | 09/12/2006 |
| 7095232 | Determination of borehole geometry inside cased wells with crosswell electromagnetics A method is disclosed for locating a receiver in a borehole having a conductive liner by inducing an electromagnetic field from a transmitter in a first borehole, detecting at a first location by at least one receiver located in a second borehole having a conductive... | 08/22/2006 |
| 7090018 | Reverse circulation clean out system for low pressure gas wells The present invention provides an apparatus and a method for removing undesirable material from a well bore in a hydrocarbon formation with minimum damage to the formation. The apparatus comprises a concentric tubing string, said concentric tubing string further com... | 08/15/2006 |
| 7088097 | Method for fitting a sum of exponentials to experimental data by linearization using a numerical integration approximation, and its application to well log data A method for analyzing formations using measurements from a detector in response to energy imparted therein. The measurements have characteristics which exponentially reduce in magnitude with time. The method includes (a) determining, an N-th order integral of the v... | 08/08/2006 |
| 7083008 | Apparatus and method for pressure-compensated telemetry and power generation in a borehole An apparatus and related method are useful for compensating the pressure of drilling fluid in a drill collar disposed in a borehole. The apparatus includes a stator adapted for being secured within the drill collar against rotation relative to the drill collar, and ... | 08/01/2006 |
