For Magnetic Field Detection Patents (Class 324/331)
  • Patent number: 10520631
    Abstract: A method of generating a magnetic anomaly map and a system to develop a magnetic anomaly map are described. The method includes obtaining magnetic compass data recorded by two or more magnetic compasses disposed along a seismic streamer that traverses a first area and obtaining measurements from one or more navigation systems over the first area. The method also includes determining a correct position of each of the two or more magnetic compasses based on the measurements from the one or more navigation systems, and comparing the magnetic compass data with theoretical magnetic field data at the correct positions to generate a magnetic anomaly map.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: December 31, 2019
    Assignee: CONOCOPHILLIPS COMPANY
    Inventors: Peter M. Eick, Joel D. Brewer
  • Patent number: 10378900
    Abstract: Technology for determining a geographical location is described. A sequence of magnetic field gradient measurements can be identified for specific positions on the Earth that correspond to a path traveled by a moving platform. The sequence of magnetic field gradient measurements for the path can be compared to a reference magnetic field gradient map. A trajectory derived from the reference magnetic field gradient map that correlates to the sequence of magnetic field gradient measurements can be identified. The trajectory can have known geographical coordinates. The geographical location of the moving platform can be determined based on the known geographical coordinates of the trajectory.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: August 13, 2019
    Assignee: Raytheon Company
    Inventors: Matthew E. Gann, Garabed P. Hagopian, James C. Zellner, Benjamin Dolgin, Ender E. Barillas
  • Patent number: 10241224
    Abstract: A system and method for airborne geophysical exploration over the ground are disclosed. In one embodiment of the system, two towing bodies are towed behind an aircraft in flight in a vertically spaced-apart relation above a ground station. Respective magnetometer measurement instruments are located within each of the towing bodies and the ground station. Each magnetometer measurement instrument collects total field magnitude data to contribute to the magnetic vertical gradient data relative to magnetic crustal anomalies of geological origin and variations in an ambient magnetic field above the surface area of the survey. Each magnetometer measurement instrument also collects location, time, and inertial data substantially simultaneously with the total field magnitude data to provide position-correlated measurements thereof.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: March 26, 2019
    Assignee: Slocum Geophysics, LLC
    Inventors: Robert E. Slocum, Gary T. Kuhlman
  • Patent number: 10228482
    Abstract: An electromagnetic geophysical exploration system includes a first transmitter configured to transmit a first waveform in a first spectrum, a first receiver configured to sense signals in the first spectrum, a second transmitter configured to transmit a second waveform in a second spectrum, the second spectrum having a frequency higher than a frequency of the first spectrum, a second receiver configured to sense signals in the second spectrum, the second receiver configured to be minimum-coupled to the second transmitter, wherein a transmitter coil of the second transmitter is disposed between an inner receiver coil and an outer receiver coil of the second receiver, and the inner receiver coil and the outer receiver coil of the second receiver surround the transmitter coil of the second transmitter, and a control portion configured to control the first transmitter and the second transmitter.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: March 12, 2019
    Assignee: CGG SERVICES SAS
    Inventors: Adam Smiarowski, Jason Berringer, Philip Miles
  • Patent number: 10192182
    Abstract: Implementations are directed to surveying equipment and/or signals at well sites using an aerial drone. In some implementations, actions include receiving data provided from the aerial drone, the data including signal measurement data, location data, and one or more of image data and video data associated with a well-site, processing the data to provide one or more of a signal survey and a well-site survey associated with the well-site, the signal survey indicating a strength of a signal at multiple locations of the well-site, the well-site survey indicating one or more pieces of equipment located at the well-site, and providing the one or more of the signal survey and the well-site survey to provide an equipment schedule, the equipment schedule identifying equipment to be installed at the well-site and, for at least one piece of equipment, a location to install the at least one piece of equipment.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: January 29, 2019
    Assignee: WellAware Holdings, Inc.
    Inventors: John Whipple, Nakul Jeirath, Cameron Archer, David Allen Sisk, Stephen Gray, Cody James Lee, Jesus Gonzalez, Jr., Theodore Wilmes
  • Patent number: 9977435
    Abstract: A method of migrating unmanned aerial vehicle (UAV) operations between geographic survey areas, including: uploading a first plurality of flight missions into a first UAV pod; deploying the UAV pod; autonomously launching the UAV from the UAV pod a plurality of times to perform the first plurality of flight missions; providing first survey data from the UAV to the UAV pod; autonomously migrating the UAV from the first UAV pod to a second UAV pod; receiving a second plurality of flight missions in a second UAV pod; providing the UAV with one of the second plurality of flight missions from the second UAV pod; autonomously launching the UAV from the second UAV pod a plurality of times to perform the second plurality of flight missions; and providing a second survey data from the UAV to the second UAV pod; where the autonomous migrating of the UAV to accomplish the first and second survey data happens autonomously and without active human intervention.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: May 22, 2018
    Assignee: AEROVIROMENT, INC.
    Inventors: Christopher Eugene Fisher, Jason Sidharthadev Mukherjee, William Arden Lott, Eric James Aagaard
  • Patent number: 9846255
    Abstract: Method for semi-airborne electromagnetic prospecting for hydrocarbons or other fluids or minerals. In the method, electromagnetic receivers are deployed on the Earth's surface over a subsurface region (71). An airborne electromagnetic transmitter is flown over the receivers (72) and the receivers record at least one component of electromagnetic field data excited by the transmitter (73). The recorded electromagnetic data are analyzed for subsurface resistivity (74), and the resistivity is interpreted for evidence of hydrocarbons or other fluids or minerals (75). Compared to traditional fully airborne surveys, the advantages of the method include better signal-to-noise, and data for multiple source-receiver offsets.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: December 19, 2017
    Assignee: ExxonMobil Upstream Research Company
    Inventor: Brent D. Wheelock
  • Patent number: 9824597
    Abstract: Methods and configurations are disclosed for exploiting characteristic magnetic signature of electrical power transmission and distribution lines for navigation.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: November 21, 2017
    Assignee: Lockheed Martin Corporation
    Inventor: Stephen M. Sekelsky
  • Patent number: 9817844
    Abstract: An aeromagnetic pre-processing system based on a graphic user interface (GUI) includes an input unit for inputting measured aeromagnetic data, GPS data, and reference magnetic data, a data storage unit for storing individual data, collection data, and edition data on division area data groups obtained after an investigation area is divided, a GUI providing unit for providing a GUI for data input/output, an operation unit for performing an operation to perform pre-processing for each of the division area data groups and collection and leveling of the division area data groups, and a controller for controlling the input unit, the data storage unit, the GUI providing unit, and the operation unit.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: November 14, 2017
    Assignee: KOREA RESOURCES CORPORATION
    Inventor: Gwang Beom Ko
  • Patent number: 9804892
    Abstract: Techniques for tracking large numbers of moving objects in an event processing system are provided. An input event stream can be received, where the events in the input event stream represent the movement of a plurality of geometries or objects. The input event stream can then be partitioned among a number of processing nodes of the event processing system, thereby enabling parallel processing of one or more continuous queries for tracking the objects. The partitioning can be performed such that each processing node is configured to track objects in a predefined spatial region, and the spatial regions for at least two nodes overlap. This overlapping window enables a single node to find, e.g., all of the objects within a particular distance of a target object, even if the target object is in the process of moving from the region of that node to the overlapping region of another node.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: October 31, 2017
    Assignee: Oracle International Corporation
    Inventors: Hoyong Park, Eric Hsiao, Andy Piper
  • Patent number: 9632198
    Abstract: An airborne electromagnetic survey system that determines a calibration factor for its receiver system by combining low frequency sensitivity for its magnetic induction sensors, with measurements of high frequency response obtained using calibration loops.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: April 25, 2017
    Assignee: GEOTECH AIRBORNE LIMITED
    Inventor: Jack Dodds
  • Patent number: 9404750
    Abstract: Embodiments include one or more high altitude, long endurance (HALE) unmanned aircraft (110) capable of persistent station-keeping having one or more electromagnetic (IR/Visual/RF) sensor elements or suites (112, 337) for purposes of survey and/or signal gathering. Embodiments include one or more high altitude, long endurance (HALE) unmanned aircraft (110) capable of persistent station-keeping having a directable laser (331). Embodiments include a group of four or more high altitude, long endurance (HALE) unmanned aircraft (611-614) configured as GPS repeaters.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: August 2, 2016
    Assignee: AEROVIRONMENT, INC.
    Inventor: Edward Oscar Rios
  • Patent number: 9316758
    Abstract: Methods and apparatuses for geophysical surveying are disclosed. In one embodiment, a marine vehicle may obtain magnetic measurements in a location around a drilling site. The magnetic measurements may be used to calculate a localized disturbance magnetic field resulting from, for example, solar flares. The localized disturbance magnetic field may be used to calculate a declination value and, thus, a wellbore position with improved accuracy.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: April 19, 2016
    Assignee: LIQUID ROBOTICS OIL AND GAS LLC
    Inventors: Sudhir Pai, Benny Poedjono, Graham Lancaster Hine
  • Patent number: 9030203
    Abstract: Disclosed are a portable unmanned airship for magnetic survey and a magnetic survey system using the same. The portable unmanned airship includes a fuselage using buoyancy of gas and propelled by motive power of the fuselage itself; an auto-flight unit automatically guiding the fuselage; a magnetometer disposed in the fuselage and measuring magnetic force of a stratum or a surface of the earth; a wireless communication unit transmitting magnetic data obtained by the magnetometer outside; and a control module controlling operations of the auto-flight unit and the magnetometer. With this configuration, it is possible to increase total operation time and a payload capacity of the unmanned airship.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: May 12, 2015
    Assignee: Korea Institute of Geosciences & Mineral Resources
    Inventors: Seong-Jun Cho, Jong-Sou Park, Gye-Soon Park
  • Patent number: 9016617
    Abstract: The present invention provides methods and apparatus for unmanned aerial vehicles (UAVs) with improved reliability. According to one aspect of the invention, interference experienced by onboard sensors from onboard electrical components is reduced. According to another aspect of the invention, user-configuration or assembly of electrical components is minimized to reduce user errors.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: April 28, 2015
    Assignee: SZ DJI Technology Co., Ltd
    Inventors: Tao Wang, Tao Zhao, Shaojie Chen, Zhigang Ou
  • Publication number: 20150015263
    Abstract: The present invention provides a light weight, modular and rigid structure for supporting the transmitter loop of an airborne electromagnetic system. The airborne electromagnetic surveying system comprises a tow assembly connected to an aircraft, the tow assembly including a transmitter section comprising a transmitter coil for generating a primary electromagnetic field that induces a secondary electromagnetic field. The transmitter coil is supported by a generally rigid transmitter frame. The transmitter frame comprises a plurality of frame sections assembled in a way such that the generally rigid transmitter frame substantially retains a rigid shape during operation. The system may also include a receiver section located above the generally rigid transmitter frame in between the aircraft and the generally rigid transmitter frame for detecting the secondary electromagnetic field.
    Type: Application
    Filed: November 8, 2012
    Publication date: January 15, 2015
    Applicant: CGG DATA SERVICES AG
    Inventors: John Philip Miles, William Wallace Marr
  • Patent number: 8917094
    Abstract: Downhole tools and techniques acquire information regarding nearby conductors such as pipes, well casing, and conductive formations. At least some method embodiments provide a current flow along a drill string in a borehole. The current flow disperses into the surrounding formation and causes a secondary current flow in the nearby conductor. The magnetic field from the secondary current flow can be detected using one or more azimuthally-sensitive antennas. Direction and distance estimates may be obtainable from the azimuthally-sensitive measurements, and can be used as the basis for steering the drillstring relative to the distant conductor. Possible techniques for providing current flow in the drillstring include imposing a voltage across an insulated gap or using a toroid around the drillstring to induce the current flow.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: December 23, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Michael S. Bittar, Jing Li
  • Patent number: 8878538
    Abstract: An airborne geophysical surveying system comprising a receiver coil assembly for towing by an aircraft, the receiver assembly including a receiver coil for sensing changes in a magnetic field component of a magnetic field, and a receiver coil orientation sensing system for sensing orientation changes of the receiver coil. A controller receives signals representing the sensed changes in the magnetic field component from the receiver coil and the sensed orientation changes from the receiver coil orientation sensing system and corrects the sensed changes in the magnetic field component to provide a signal that is corrected for noise caused by changing orientation of the receiver coil in a static geomagnetic field.
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: November 4, 2014
    Assignee: Geotech Airborne Limited
    Inventors: Petr Valentinovich Kuzmin, Jack Dodds
  • Publication number: 20140312905
    Abstract: Method for semi-airborne electromagnetic prospecting for hydrocarbons or other fluids or minerals. In the method, electromagnetic receivers are deployed on the Earth's surface over a subsurface region (71). An airborne electromagnetic transmitter is flown over the receivers (72) and the receivers record at least one component of electromagnetic field data excited by the transmitter (73). The recorded electromagnetic data are analyzed for subsurface resistivity (74), and the resistivity is interpreted for evidence of hydrocarbons or other fluids or minerals (75). Compared to traditional fully airborne surveys, the advantages of the method include better signal-to-noise, and data for multiple source-receiver offsets.
    Type: Application
    Filed: February 7, 2014
    Publication date: October 23, 2014
    Inventor: Brent D. Wheelock
  • Patent number: 8847601
    Abstract: A method of determining the maximum temperature undergone by a specimen of sedimentary rock during natural heating over a geological process, within the range from 60° C. to 230° C. approximately. The method includes analysis at very low temperature, down to a few kelvin, for example down to 10 kelvin, of the magnetic transitions intended to characterize an iron oxide and an iron sulfide that are formed or destroyed in the specimen by the geological heating of the sediment; and determination of the maximum temperature undergone by the specimen, using a calibration obtained by measuring the same magnetic parameters on the same sediment or on other sediments of the same nature, heated beforehand in the laboratory to known temperatures.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: September 30, 2014
    Inventors: Jean Pierre Pozzi, Charles Aubourg
  • Patent number: 8848992
    Abstract: The invention relates to a method of determining a susceptibility gradient map, the method comprising acquiring (300) a magnetic resonance k-space dataset, said dataset comprising magnetic resonance echo data, wherein a recursive iteration is used to determine the susceptibility gradient map. Further, the invention relates to a method of determining a susceptibility gradient map, the method comprising acquiring a magnetic resonance k-space dataset, said dataset comprising magnetic resonance echo data, wherein the acquired dataset comprises magnetic resonance echo data of multiple echoes with different echo times, wherein a susceptibility gradient map is determined separately for each echo time resulting in a temporary susceptibility gradient map, wherein the method further comprises calculating a total susceptibility gradient map by combining all determined temporary susceptibility gradient maps.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: September 30, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Julien Senegas, Thomas Perkins
  • Patent number: 8829899
    Abstract: A pneumatic vibration isolating suspension is disclosed for supporting a payload on a moving carrier while suppressing the transmission of vibrations in the 1 to 50 Hz band between the carrier and the payload. The disclosed invention can be deployed in the air in a towed carrier or sonde, and operated from aircraft power, making it a suitable platform for airborne geophysical instrumentation. It also has particular application to airborne electromagnetic surveying operating in the same frequency band because the sensor vibrations that result in noise created by the modulation of the sensor coupling with the earth's magnetic field are suppressed. Furthermore, the invention can be constructed from resistive composite materials and non-magnetic metals, so it can be operated without producing significant modification to the ambient electromagnetic field being measured.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: September 9, 2014
    Assignee: Vale S.A.
    Inventors: Benjamin David Polzer, Gordon Fox West, Peter White Walker
  • Patent number: 8786277
    Abstract: A magnetic signal noise reduction and detection system has inputs configured to receive data from a first total field scalar magnetometer, data from a vector magnetometer, and data from a position, velocity and heading sensor, a signal processor configured with a pre-processor system, an adaptive noise cancellation system and a detection system, the pre-processor system configured to carry out initial processing of data received. The pre-processor is configured to convert data to the frequency domain and pass the converted data to the adaptive noise cancellation system. The adaptive noise cancellation system is configured to carry out multivariate regression on the converted data to reduce detected noise. The detection system is configured to detect magnetic anomalies and output information in real time about the magnetic anomalies to a user interface.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: July 22, 2014
    Assignee: Raytheon Applied Signal Technology, Inc.
    Inventors: Michael L. Webb, Aaron C. White
  • Patent number: 8786286
    Abstract: According to one example embodiment is a time domain electromagnetic (TDEM) geophysical survey system for producing a B-field measurement, comprising: a transmitter coil; a bucking coil positioned in a substantially concentric and coplanar orientation relative to the transmitter coil; a receiver coil positioned in a substantially concentric and coplanar orientation relative to the bucking coil; an electrical current source connected to the transmitter coil and bucking coil for applying a periodic current thereto; and a data collection system configured to receive a magnetic field time-derivative signal dB/dt from the receiver coil and integrate the magnetic field time-derivative signal dB/dt to generate, a magnetic B-field measurement, the transmitter coil, bucking coil and receiver coil being positioned relative to each other such that, at the location of the receiver coil, a magnetic field generated by the bucking coil has a cancelling effect on a primary magnetic field generated by the transmitter coil.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: July 22, 2014
    Assignee: Geotech Airborne Limited
    Inventors: Petr Valentinovich Kuzmin, Edward Beverly Morrison
  • Patent number: 8766640
    Abstract: A tow assembly for an airborne electromagnetic surveying system, including: a transmitter coil frame supporting a transmitter coil, the transmitter coil frame being formed from a plurality of serially connected frame sections forming a loop, the transmitter coil frame having rotating joints at a plurality of locations about a circumference thereof enabling the transmitter coil frame to at least partially bend at the rotating joints; and a suspension assembly for towing the transmitter coil frame behind an aircraft, the suspension assembly being attached to the circumference of the transmitter coil frame at spaced apart locations.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: July 1, 2014
    Assignee: Geotech Airborne Limited
    Inventors: Petr Valentinovich Kuzmin, Edward Beverly Morrison
  • Patent number: 8736270
    Abstract: 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.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: May 27, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Jean Seydoux, Emmanuel Legendre, Reza Taherian
  • Publication number: 20140084930
    Abstract: An airborne electromagnetic survey system that monitors the dipole moment. A TDEM system includes a flexible transmitter loop and a receiver having three sensors with mutually perpendicular sensitive axes. In flight, mechanical and aerodynamic forces cause the transmitter loop to tilt and flex, which affects the direction and magnitude of the primary field dipole moment. The processing system measures the sign and amplitude of the primary field sensed by the receiver in each of its sensitive axes and calculates a vector which represents the orientation of the primary field in the receiver frame of reference at the receiver location. Using this vector, the processing system determines the orientation of the primary field dipole moment.
    Type: Application
    Filed: March 7, 2012
    Publication date: March 27, 2014
    Applicant: GEOTECH AIRBORNE LIMITED
    Inventor: Jack Dodds
  • Patent number: 8674701
    Abstract: A tow assembly for an airborne electromagnetic surveying system including a semi-rigid transmitter coil frame supporting a transmitter coil, the transmitter coil frame being formed from a plurality of serially connected frame sections forming a loop, the transmitter coil frame having articulating joints at a plurality of locations about a circumference thereof enabling the transmitter coil frame to at least partially bend at the articulating joints; and a suspension assembly for towing the transmitter coil frame behind an aircraft, the suspension assembly comprising a plurality of ropes and attached to the circumference of the transmitter coil frame at spaced apart locations.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: March 18, 2014
    Assignee: Geotech Airborne Limited
    Inventors: Petr Valentinovich Kuzmin, Edward Beverly Morrison
  • Patent number: 8614578
    Abstract: The present disclosure relates to determining the attenuation of an electromagnetic signal passing through a conductive material. An antenna is provided and placed in relatively close proximity to the conductive material. An alternating current is passed through the antenna and the impedance of the antenna is measured. The attenuation is determined using the measured impedance. A single frequency measurement may be made, or multiple measurements using different frequencies may be made. Grouped parameters based on properties of the material and the frequency of the current are used to relate the coil impedance to the attenuation. A current frequency for which the ratio of the antenna's resistive part of the impedance to the angular frequency of the current is substantially insensitive to at least one of the parameters is preferred.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: December 24, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Guozhong Gao, H. Frank Morrison, Hong Zhang, Richard A. Rosthal, David Alumbaugh, Cyrille Levesque
  • Patent number: 8456159
    Abstract: A stabilized field sensor apparatus collects field data, in particular magnetic field data, with reduced motion noise. The apparatus includes a tear drop shaped housing, a tow frame in the housing, a plurality of vibration isolating dampers spaced around the frame, a base assembly mounted to the dampers, a support pedestal having a bottom end fixed to the base assembly and an upper free end, a single spherical air bearing connected to the upper free end of the pedestal, an instrument platform with a lower hollow funnel having an upper inside apex supported on the air bearing for a one point support, principal and secondary gyro stabilizers for maintaining pivotal and rotational stability, and at least one field sensor mounted to the instrument platform for collecting the field data while being stabilized against motion noise including vibration, pivoting and rotation from the base assembly, from the tow frame and from the housing.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: June 4, 2013
    Assignee: Vale S.A.
    Inventors: Benjamin David Polzer, Gordon Fox West, Peter Whyte Walker, Peter Anthony Hurley, Robert Leslie Scott Hogg
  • Patent number: 8400157
    Abstract: The present invention relates to a HTEM system that includes a semi-rigid bucking coil and an algorithm to determine the magnetic field B from the measured signal dB/dt. The bucking coil may be positioned in a concentric coplanar manner relative to a transmitter coil and receiver coil, in order to minimize spurious signals at the receiver coil during data acquisition time. Signals gathered by the system may be further processed by a signal processing means. Moreover, measurements performed upon data generated by the system may be performed upon the entire period of a current waveform applied to the transmitter and bucking coils.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: March 19, 2013
    Assignee: Geotech Airborne Limited
    Inventors: Petr Valentinovich Kuzmin, Edward Beverly Morrison
  • Publication number: 20120293177
    Abstract: A receiver coil assembly for performing geophysical surveys, including a hollow outer shell defining a continuous internal passage that forms a loop; a multiturn receiver air coil extending around the continuous internal passage; and a first cored coil comprising multiturn solenoid windings about a ferromagnetic core, the first cored coil having a sensing axis in a different direction than a sensing axis of the air coil.
    Type: Application
    Filed: May 17, 2012
    Publication date: November 22, 2012
    Applicant: GEOTECH AIRBORNE LIMITED
    Inventor: Jack DODDS
  • Patent number: 8278928
    Abstract: An apparatus for detecting a position of a component in an earth formation is disclosed. The apparatus includes: a transmitter configured to emit a first magnetic field into the earth formation and induce an electric current in the component, the transmitter having a first magnetic dipole extending in a first direction; and a receiver for detecting a second magnetic field generated by the component in response to the first magnetic field, the receiver having a second magnetic dipole extending in a second direction orthogonal to the first direction. A method and computer program product for detecting a position of a component in an earth formation is also disclosed.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: October 2, 2012
    Assignee: Baker Hughes Incorporated
    Inventor: Alexandre N. Bespalov
  • Publication number: 20120212228
    Abstract: Disclosed are a portable unmanned airship for magnetic survey and a magnetic survey system using the same. The portable unmanned airship includes a fuselage using buoyancy of gas and propelled by motive power of the fuselage itself; an auto-flight unit automatically guiding the fuselage; a magnetometer disposed in the fuselage and measuring magnetic force of a stratum or a surface of the earth; a wireless communication unit transmitting magnetic data obtained by the magnetometer outside; and a control module controlling operations of the auto-flight unit and the magnetometer. With this configuration, it is possible to increase total operation time and a payload capacity of the unmanned airship.
    Type: Application
    Filed: October 29, 2009
    Publication date: August 23, 2012
    Applicant: KOREA INSTITUTE OF GEOSCIENCE & MINERAL RESOURCES
    Inventors: Seong-Jun Cho, Jong-Sou Park, Gye-Soon Park
  • Patent number: 8174266
    Abstract: An apparatus, method and computer-readable medium for obtaining a resistivity image of an earth formation. The apparatus includes a downhole assembly configured to be conveyed in a borehole penetrating the earth formation; a plurality of sensor electrodes on the downhole assembly, each of the plurality of sensor electrodes having a different capacitance to a wall of the borehole; and at least one processor configured to: (i) process measurements using each of the sensor electrodes; (ii) process a subset of the measurements substantially unaffected by the different capacitances to produce an image of the borehole wall; and (iii) record the image on a suitable medium.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: May 8, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Randy Gold, Alexandre N. Bespalov, Gregory B. Itskovich
  • Patent number: 8169222
    Abstract: A method for designing a controlled-source electromagnetic survey that will discriminate between a defined deep marginal-interest reservoir (2) and specified false positive resistivity structures of concern (3, 4, 5). A reservoir model and a false positive model are constructed for each false positive scenario. The resistivity of the false positive model may be tuned to give electromagnetic data similar enough to the reservoir model when forward modeled that any differences fall in the model null space. A null-space discriminating ratio (“NSDR”) is defined, for example as the peak normalized difference of the two related modeled electromagnetic field data sets. An area coverage display of NSDR values (6) allows determination of such additional data as may be needed to distinguish the false positive body, and a survey design is developed accordingly (7). Reduction of the number of variables affecting the area coverage displays is a key feature of the method.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: May 1, 2012
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Scott C. Hornbostel, Kenneth E. Green
  • Patent number: 8058864
    Abstract: A magnetic field has a threshold that adapts in relation to a magnitude of a magnetic field signal representative of a movement of an object. A corresponding method adapts a threshold in relation to a magnitude of a magnetic field signal representative of a movement of an object.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: November 15, 2011
    Assignee: Allegro Microsystems, Inc.
    Inventors: P. Karl Scheller, Andreas P. Friedrich, William P. Taylor
  • Publication number: 20110181290
    Abstract: An airborne geophysical surveying system comprising a receiver coil assembly for towing by an aircraft, the receiver assembly including a receiver coil for sensing changes in a magnetic field component of a magnetic field, and a receiver coil orientation sensing system for sensing orientation changes of the receiver coil. A controller receives signals representing the sensed changes in the magnetic field component from the receiver coil and the sensed orientation changes from the receiver coil orientation sensing system and corrects the sensed changes in the magnetic field component to provide a signal that is corrected for noise caused by changing orientation of the receiver coil in a static geomagnetic field.
    Type: Application
    Filed: November 26, 2010
    Publication date: July 28, 2011
    Applicant: GEO EQUIPMENT MANUFACTURING LTD.
    Inventors: Petr Valentinovich Kuzmin, Jack Dodds
  • Patent number: 7980327
    Abstract: The invention provides for systems and methods of enhancing crude oil recovery providing an array of electromagnetic receiver antennae arranged and operated in conjunction with an array of far field electromagnetic transmitter antennae for mapping subsurface features of a reservoir. Mapping is performed according to the relative intensities, frequencies, phase shifts, and/or other reflected signal parameters of the reflections received by the receiver antennae (relative to the transmit signals) associated with a given location or target area within a reservoir. Such mapping aids in determining an optimal location of a production well or the location of an auxiliary well relative to the production well.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: July 19, 2011
    Assignee: Lockheed Martin Corporation
    Inventors: Vincent Benischek, Michael Currie, Rajneeta Basantkumar, Gennady Lyasko
  • Patent number: 7948237
    Abstract: An airborne time domain electromagnetic survey system is provided. The system and apparatus of the present invention are able to address the interest in exploring base metals and uranium deposits at depths approaching 1 kilometer. It encompasses a transmitter coil having a large magnetic dipole moment, flight stability, which is light weight, compatible with small helicopters, and can be transported, setup and repaired in the field. It is of a semi-rigid modular structure that can decrease the incidence of damage or breakage during take-off or landing in rough terrain.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: May 24, 2011
    Assignee: Geotech Airborne Limited
    Inventors: Petr Valentinovich Kuzmin, Edward Beverly Morrison
  • Publication number: 20100237870
    Abstract: A geophysical survey system comprising: a first sensor system towed by an aircraft, having at least one airborne sensor for measuring electric components of a low frequency natural electromagnetic field in a survey area; a second sensor system for positioning at a fixed position on the ground during a survey, having at least two ground based induction coil sensors for measuring magnetic components of a low frequency natural electromagnetic field in or near the survey area, the ground based sensors each being oriented to sense the magnetic components in different directions; and a processing system for calculating a set of first vector values over time in dependence on the electric components measured through the first sensor system and calculating a set of second vector values over time in dependence on the magnetic components measured through the second sensor system and comparing one or more characteristics of the first vector values and the second vector values to identify geophysical information about the
    Type: Application
    Filed: March 17, 2010
    Publication date: September 23, 2010
    Applicant: Geo Equipment Manufacturing Limited
    Inventor: Jack Dodds
  • Patent number: 7701337
    Abstract: A hybrid-technology metal detector, using pulse-induction and sine-wave excitation of the transmitter coil alternately, in rapid succession. The energy stored in the transmitter coil, in the pulsed mode, is used to shock-excite a high-Q circuit formed by the coil and a parallel capacitor into oscillations in the sine-wave mode. The multiplicative action of the circuit Q causes high currents to flow in the transmitter coil, causing high fluxes to be impressed on the searched area, with increased sensitivity as a result. Using a linear coil-current ramp to assess and minimize the coupling between the transmitter and receiver coils permits effective separation of the reactive and resistive components of the target signals, making accurate identification of targets possible.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: April 20, 2010
    Inventor: Allan Westersten
  • Patent number: 7681831
    Abstract: A suspension net is provided for distributing tension forces from a tow rope to an electromagnetic bird used for geophysical surveying. The suspension net allows large transmitter loop sizes, and the net structure generally avoids rope confusions that can occur during lift-up.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: March 23, 2010
    Assignee: Geotech Airborne Limited
    Inventor: Petr Valentinovich Kuzmin
  • Publication number: 20100052685
    Abstract: The present invention relates to a HTEM system that includes a semi-rigid bucking coil and an algorithm to determine the magnetic field B from the measured signal dB/dt. The bucking coil may be positioned in a concentric coplanar manner relative to a transmitter coil and receiver coil, in order to minimize spurious signals at the receiver coil during data acquisition time. Signals gathered by the system may be further processed by a signal processing means. Moreover, measurements performed upon data generated by the system may be performed upon the entire period of a current waveform applied to the transmitter and bucking coils.
    Type: Application
    Filed: August 29, 2008
    Publication date: March 4, 2010
    Applicant: GEOTECH AIRBORNE LIMITED
    Inventors: Petr Valentinovich Kuzmin, Edward Beverly Morrison
  • Patent number: 7646201
    Abstract: An airborne electromagnetic survey system for conducting geological mapping is disclosed. A transmitter closed loop structure is used in the system and is designed for connection to a towing airborne vehicle. The transmitter loop structure comprises a plurality of interconnected loop segments, and transmitting means are fitted to at least one of the loop segments for generating and transmitting an earthbound primary electromagnetic field effective for geological surveying. Sensing means are fitted to the loop segments for receiving and sensing a vertical component of a secondary resulting electromagnetic field which arises from an interaction of the primary electromagnetic field with ground bodies that are traversed by the sensing means, while simultaneously nulling the primary electromagnetic field.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: January 12, 2010
    Assignee: Fugro Airborne Surveys Crop.
    Inventors: Philip J. Miles, Jason Berringer, David G. Hodges, Peter A. Wolfgram
  • Patent number: 7640110
    Abstract: A method of determining the nature of a submarine or subterranean reservoir having an electromagnetic characteristic is described. The method comprises analyzing data associated with the application of a time varying electromagnetic field from above the reservoir using a data analysis methodology that does not utilize an estimate of the reservoir's geometry in determining one or more characteristics of the reservoir.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: December 29, 2009
    Assignee: Schlumberger Technology Corporation
    Inventors: Aria Abubakar, Tarek M. Habashy, Vladimir Druskin, David Lee Alumbaugh
  • Patent number: 7432715
    Abstract: A metal detector employing digital means for the generation of highly quality reference signals used for transmission and demodulation and capable of continuously monitoring the parameters of the transmitting and receiving coils. Using the monitored signals and calibration of the measurements paths in both amplitude-frequency and phase-frequency, the effects of the targets and magnetic and/or conductive grounds on the transmitting and receiving coils are greatly reduced, leaving the received signals substantially free of instrumental effects. Methods of ground tracking and filtering are described to separate target information from the ground plus-target receive signals. Single-and multi-frequency operation, with or without modulation for both sinusoidal and square wave transmission, is described, as are means to detect abnormal situations and to find and operate at resonance.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: October 7, 2008
    Assignee: Minelab Electronics Pty Limited
    Inventor: Laurentiu Stamatescu
  • Patent number: 7397111
    Abstract: An electronic component includes a semiconductor chip with a chip topside, an integrated circuit, and a chip backside. The chip backside includes a magnetic layer. The electronic component further includes a chip carrier with a magnetic layer on its carrier topside. At least one of the two magnetic layers is permanently magnetic such that the semiconductor chip is magnetically fixed on the chip carrier.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: July 8, 2008
    Assignee: Infineon Technologies, AG
    Inventors: Simon Jerebic, Jens Pohl, Horst Theuss
  • Patent number: 7397417
    Abstract: The invention relates to an apparatus and method for performing passive geophysical prospecting. More particularly, the present invention relates to an improved apparatus and method for locating and selected subsurface Earth material deposits or geologic formations bearing hydrocarbons, oil, gas, or commercially important ore deposits, precious metals, as a function of impulse discontinuities in the near surface atmosphere of the invention. A passive geophysical prospecting method and apparatus are provided. The apparatus has a magnetic component antenna for detecting electromagnetic radiation naturally emanating from the Earth's surface and an electrical signal from the detected electromagnetic radiation while traversing the Earth's surface by a vehicle traveling over land or water or in an airplane.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: July 8, 2008
    Inventor: John R. Jackson
  • Publication number: 20080143130
    Abstract: A suspension net is provided for distributing tension forces from a tow rope to an electromagnetic bird used for geophysical surveying. The suspension net allows large transmitter loop sizes, and the net structure generally avoids rope confusions that can occur during lift-up.
    Type: Application
    Filed: December 14, 2006
    Publication date: June 19, 2008
    Inventor: Petr Valentinovich Kuzmin