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Class Information
Number: 324/347
Name: Electricity: measuring and testing > Of geophysical surface or subsurface in situ > Using electrode arrays, circuits, structure, or supports
Description: Subject matter relating to means for introducing electric currents into the subsurface or for collecting electric currents from the subsurface by conduction.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7602191 |
Cable-type electromagnetic receiver system for subsurface exploration |
Oct. 13, 2009 |
| 7603158 |
Current density impedance imaging (CDII) |
Oct. 13, 2009 |
| 7586310 |
While-drilling apparatus for measuring streaming potentials and determining earth formation characteristics and other useful information |
Sep. 8, 2009 |
| 7557582 |
Logging while drilling tool for obtaining azimuthally sensitive formation resistivity measurements |
Jul. 7, 2009 |
| 7482813 |
Three-axis marine electric field sensor for seafloor electrical resistivity measurement |
Jan. 27, 2009 |
| 7466136 |
While-drilling methodology for determining earth formation characteristics and other useful information based upon streaming potential measurements |
Dec. 16, 2008 |
| 7446522 |
Constant contact wheel for close interval survey devices |
Nov. 4, 2008 |
| 7436184 |
Well logging apparatus for obtaining azimuthally sensitive formation resistivity measurements |
Oct. 14, 2008 |
| 7397250 |
High resolution resistivity earth imager |
Jul. 8, 2008 |
| 7394258 |
High resolution resistivity earth imager |
Jul. 1, 2008 |
| 7388381 |
High resolution geoelectrical probe |
Jun. 17, 2008 |
| 7388380 |
While-drilling apparatus for measuring streaming potentials and determining earth formation characteristics and other useful information |
Jun. 17, 2008 |
| 7385401 |
High resolution resistivity earth imager |
Jun. 10, 2008 |
| 7327146 |
Probe for measuring the electromagnetic properties of a down-hole material |
Feb. 5, 2008 |
| 7301345 |
While-drilling methodology for estimating formation pressure based upon streaming potential measurements |
Nov. 27, 2007 |
| 7298147 |
Device and process for determination of the resistivity of a formation surrounding a cased borehole |
Nov. 20, 2007 |
| 7285218 |
Method for the extra-corporeal qualitative and/or quantitative recording of neurotoxic substances in the blood plasma of an individual |
Oct. 23, 2007 |
| 7276910 |
Compact self-tuned electrical resonator for buried object locator applications |
Oct. 2, 2007 |
| 7256582 |
Method and apparatus for improved current focusing in galvanic resistivity measurement tools for wireline and measurement-while-drilling applications |
Aug. 14, 2007 |
| 7239154 |
Soil penetrating electrode with conical taper |
Jul. 3, 2007 |
| 7239145 |
Subsurface electromagnetic measurements using cross-magnetic dipoles |
Jul. 3, 2007 |
| 7233150 |
While-drilling apparatus for measuring streaming potentials and determining earth formation characteristics |
Jun. 19, 2007 |
| 7145456 |
Efficient electronics for a walk-through metal detector |
Dec. 5, 2006 |
| 7109716 |
Soil and time modeling for improved electromagnetic locators for underground utilities |
Sep. 19, 2006 |
| 7109718 |
Underground exploration apparatus |
Sep. 19, 2006 |
| 7095233 |
System, apparatus, and method of conducting borehole resistivity measurements |
Aug. 22, 2006 |
| 7071696 |
Measurement device and support for use in a well |
Jul. 4, 2006 |
| 7034538 |
Method for measuring earth formation resistivity through an electrically conductive wellbore casing |
Apr. 25, 2006 |
| 7034539 |
Underground exploration apparatus, system and method |
Apr. 25, 2006 |
| 7026820 |
Method and apparatus for minimizing direct coupling for downhole logging devices |
Apr. 11, 2006 |
| 6984983 |
System and method for evaluation of thinly laminated earth formations |
Jan. 10, 2006 |
| 6975121 |
System for measuring earth formation resistivity through and electrically conductive wellbore casing |
Dec. 13, 2005 |
| 6937023 |
Passive ranging techniques in borehole surveying |
Aug. 30, 2005 |
| 6919724 |
Method and apparatus for investigating the wall of a borehole |
Jul. 19, 2005 |
| 6891376 |
Method for attenuating conductive sonde mandrel effects in an electromagnetic induction well logging apparatus |
May. 10, 2005 |
| 6731114 |
Apparatus with capacitive electrodes for measuring subsurface electrical characteristics in the subsoil |
May. 4, 2004 |
| 6693430 |
Passive, active and semi-active cancellation of borehole effects for well logging |
Feb. 17, 2004 |
| 6667621 |
Method and apparatus for determining the resistivity of a formation surrounding a cased well |
Dec. 23, 2003 |
| 6646440 |
Device for measuring shifts in mountains |
Nov. 11, 2003 |
| 6636046 |
Electrical resistivity probes |
Oct. 21, 2003 |
| 6624634 |
Borehole current correction methods and apparatus |
Sep. 23, 2003 |
| 6615653 |
In situ method for determining soil liquefaction tendency and its prevention by electro-osmosis |
Sep. 9, 2003 |
| 6573722 |
Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole |
Jun. 3, 2003 |
| 6484652 |
Soil constituent sensor and precision agrichemical delivery system and method |
Nov. 26, 2002 |
| 6476608 |
Combining seismic waves with seismoelectrics to perform prospecting and measurements |
Nov. 5, 2002 |
| 6462549 |
Method and system for electroseismic monitoring of microseismicity |
Oct. 8, 2002 |
| 6404203 |
Methods and apparatus for measuring electrical properties of a ground using an electrode configurable as a transmitter or receiver |
Jun. 11, 2002 |
| 6380745 |
Electrical geophysical apparatus for determining the density of porous materials and establishing geo-electric constants of porous material |
Apr. 30, 2002 |
| 6351128 |
Tow mechanism for resistivity mapping apparatus |
Feb. 26, 2002 |
| 6307375 |
Seismic activity predictor in proximity with the earth including a dielectric for receiving precursor seismic electromagnetic waveforms |
Oct. 23, 2001 |
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