Matches 1 - 32 out of 32


Match Document Document Title
US20110210741 Structure for magnetic field sensor for marine geophysical sensor streamer  
A marine electromagnetic sensor cable includes a first jacket covering an exterior of the cable. At least one wire loop is disposed on the exterior of the first jacket. The wire loop is shaped to...
US20130335089 THREE DIMENSIONAL ANTENNA SYSTEM FOR MEASURING OSCILLATORY ELECTRIC FIELD STRENGTHS  
A new three dimensional dipole based antenna system is described used to measure oscillatory electric field strengths. The antenna system is connected to an object (a survey platform) that is...
US20120232800 PRECISE LOCATION AND ORIENTATION OF A CONCEALED DIPOLE TRANSMITTER  
A method for determining the location of an underground sonde transmitter is disclosed. In some embodiments, the method includes measuring a set of complex electromagnetic field magnitude and...
US20100001733 SENSOR CABLE FOR ELECTROMAGNETIC SURVEYING  
A sensor cable for surveying. The sensor cable has a housing, which includes one of more electrodes and a conductive gel surrounding the one or more electrodes. The conductive gel is configured to...
US20140152312 STIMULATING PRODUCTION FROM OIL WELLS USING AN RF DIPOLE ANTENNA  
A system emplaced in a subsurface formation configured to produce radio frequency (RF) fields for recovery of thermally responsive constituents includes coaxially disposed inner and outer...
US20130162255 ELECTROMAGNETIC GEOPHYSICAL SURVEY SYSTEMS AND METHODS EMPLOYING ELECTRIC POTENTIAL MAPPING  
The present disclosure describes various geophysical survey systems and methods for mapping an electric potential field. At least one illustrative embodiment includes an electromagnetic (EM)...
US20130229184 Stationary Source for Marine Electromagnetic Surveying  
Disclosed are methods and systems for using electromagnetic sources that are substantially stationary in a body of water while electromagnetic field signals are detected with electromagnetic...
US20070222452 Game information system and game information device  
The present invention provides a game information device or a system which allows even users having mobile phones of different types from each other to receive a uniform service respectively. A...
US20060202697 Transmitter antenna  
The present invention provides a transmitter antenna for use in Electromagnetic (EM) surveying beneath the ocean floor. The transmitter antenna according to the present invention comprises a...
US20110227576 METHOD OF MONITORING BEHAVIOR OF CARBON DIOXIDE IN POROUS AQUIFER BY USING MARINE CONTROLLED-SOURCES ELECTROMAGNETIC SURVEY  
A method of monitoring a behavior of carbon dioxide in a stratum by using a marine Controlled-Sources Electromagnetic survey, includes: (S10) collecting a sample of sandstone at a stratum for...
US20130335090 MILD STEEL DIPOLE ANTENNA SYSTEM FOR MEASURING OSCILLATORY ELECTRIC AND MAGNETIC FIELD STRENGTHS  
A one dimensional dipole based antenna system is described used to measure oscillatory electric and magnetic field strengths and the rate of change of the magnetic field strength. The system...
US20120153958 METHODS FOR DETERMINING DIELECTRIC PERMITTIVITY SPECTRUM OF UNDERGROUND ROCK FORMATIONS  
A method for determining the frequency-dependent dielectric permittivity spectrum of a rock sample, comprising:—defining a series of electromagnetic measurement data comprising at least a first...
US20100039114 Method For Electroseismic Survey Design  
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...
US20120056623 Electromagnetic Surface-to-Borehole Look Around Systems and Methods of Monitoring in Horizontal Wells  
A method for water monitoring about a deviated well is disclosed. The method includes positioning a series of electromagnetic (EM) receivers in a completed deviated wellbore, said receivers being...
US20090134877 Optimum signal for sea bed logging  
Multifrequency electromagnetic signals which may be used in the field of sea bed logging, the signal being optimised for use at a particular site, in order to greatly improve data inversion, and a...
US20120161774 MULTI-COMPONENT MARINE ELECTROMAGNETIC SIGNAL ACQUISITION METHOD  
A method for determining a component of electric field response to a time varying electromagnetic field induced in the Earth's subsurface involves measuring magnetic field gradient in at least two...
US20140253129 Silicon Controlled Rectifier Control of Deep Towed Electromagnetic Source  
A method and apparatus for generating an electromagnetic (EM) field from a sub-sea source is disclosed. In one embodiment, a sub-sea source includes a step-down transformer coupled to receive a...
US20080246485 Compact underwater electromagnetic measurement system  
An underwater EM measurement system, which is substantially smaller, much simpler to use, and more robust than prior systems, is formed as a sensor package integrated into a single pressure vessel...
US20070145980 Multi-component field sources for subsea exploration  
A multi-component field source for surveying subsea formations includes at least two electrodes having a direction of motion, wherein the at least two electrodes are configured to produce an...
US20100052686 Seismic activity detector  
A system for detecting precursor seismic electromagnetic waveforms.
US20130134971 MEDIA DISPLACEMENT DEVICE AND METHOD OF IMPROVING TRANSFER OF ELECTROMAGNETIC ENERGY BETWEEN A TOOL AND AN EARTH FORMATION  
A media displacement device has a body configured to be positioned radially outwards of a tool having an antenna for transmitting electromagnetic energy to or receiving electromagnetic energy from...
US20140111209 METHODS AND SYSTEMS FOR ANALYZING FORMATION PROPERTIES WHEN PERFORMING SUBTERRANEAN OPERATIONS  
A method of analyzing a subterranean formation is disclosed. A first signal is transmitted from a transmitter to the formation and a second signal which is a reflection of the first signal is...
US20140239955 SYSTEM FOR DETECTING A LOCATION OF A SUBSURFACE CHANNEL  
A system for detecting a location of a subsurface channel may include a portable frame and a plurality of magnetic coils supported by the frame. The magnetic coils may be spaced apart from one...
US20120158305 DRILLING COLLISION AVOIDANCE APPARATUS, METHODS, AND SYSTEMS  
In some embodiments, apparatus and systems, as well as methods, may operate to launch a set of currents into a corresponding set of existing well casings; monitor, in a well under construction,...
US20090302847 MULTI-AXIAL ANTENNA AND METHOD FOR USE IN DOWNHOLE TOOLS  
Embodiments of a multi-axial antenna system and system for measuring subsurface formations are generally described herein. Other embodiments may be described and claimed. In some embodiments, the...
US20160291194 MONITORING HYDROCARBON RESERVOIRS USING INDUCED POLARIZATION EFFECT  
Some examples of monitoring hydrocarbon reservoirs using induced polarization effect includes inducing polarization in a subterranean zone using an induced polarization fluid. The subterranean...
US20160238735 Joint Inversion of Subsurface Resistivity and Noise Parameters  
A method for jointly inverting subsurface resistivities and noise parameters that may comprise the steps of identifying electromagnetic data acquired from one or more electromagnetic sensors,...
US20160177705 Electromagnetic Ranging Source Suitable for Use in a Drill String  
An electromagnetic ranging source embodiment includes: a tubular body having a circumference; a ferromagnetic core conforming to the tubular body and extending at least halfway around the...
US20160109611 Antenna Of An Electromagnetic Probe For Investigating Geological Formations  
An antenna 3 of an electromagnetic probe used in investigation of geological formations GF surrounding a borehole WBH comprises a conductive base 31 and an antenna element 32. The conductive base...
US20120112752 COMBINING DIFFERENT ELECTROMAGNETIC DATA TO CHARACTERIZE A SUBTERRANEAN STRUCTURE  
First electromagnetic data is acquired for a subterranean structure using a first survey technique, and second electromagnetic data is acquired for the subterranean structure using a second,...
US20110213555 TIME DEPENDENT NEUTRON-GAMMA SPECTROSCOPY  
An apparatus and method for estimating at least one parameter of interest of an earth formation including an estimation of the parameter of interest using a time-dependent ratio of information...
US20110180327 Mulitmodal Geosteering Systems and Methods  
Multimodal geosteering systems and methods are disclosed. Some disclosed tool embodiments include first and second transmitter-receiver arrangements that make geosteering measurements using...

Matches 1 - 32 out of 32