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Class Information
Number: 324/353
Name: Electricity: measuring and testing > Of geophysical surface or subsurface in situ > Using electrode arrays, circuits, structure, or supports > For detecting naturally occurring fields, currents, or potentials > Within a borehole > With fluid movement or pressure variation
Description: Subject matter including means for causing the movement of the fluid or variations in the pressure of the fluid existing within the borehole or the formations surrounding the borehole.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7349819 |
Method for providing robustness to the solution of the cubic equation of state |
Mar. 25, 2008 |
| 7042801 |
System for geophysical prospecting using induce electrokinetic effect |
May. 9, 2006 |
| 6998845 |
Process and device for assessing the permeability of a rock medium |
Feb. 14, 2006 |
| 6842697 |
Method for downhole logging |
Jan. 11, 2005 |
| 6615653 |
In situ method for determining soil liquefaction tendency and its prevention by electro-osmosis |
Sep. 9, 2003 |
| 6597633 |
Method for electrolinetic downhole logging |
Jul. 22, 2003 |
| 6225806 |
Electroseismic technique for measuring the properties of rocks surrounding a borehole |
May. 1, 2001 |
| 5841280 |
Apparatus and method for combined acoustic and seismoelectric logging measurements |
Nov. 24, 1998 |
| 5689068 |
Determination of the porosity and permeability of a geological formation from an electrofiltering phenomenon |
Nov. 18, 1997 |
| 5519322 |
Magnetic field method and apparatus for evaluating in situ and/or measuring the premeability of a rock formation |
May. 21, 1996 |
| 5503001 |
Determination of permeability of porous media and thickness of layered porous media |
Apr. 2, 1996 |
| 5495175 |
Using electrokinetic phenomena and electrical resistance tomography to characterize the movement of subsurface fluids |
Feb. 27, 1996 |
| 5417104 |
Determination of permeability of porous media by streaming potential and electro-osmotic coefficients |
May. 23, 1995 |
| 5214384 |
Method including electrical self potential measurements for detecting multiphase flow in a cased hole |
May. 25, 1993 |
| 4742459 |
Method and apparatus for determining hydraulic properties of formations surrounding a borehole |
May. 3, 1988 |
| 4427944 |
System for permeability logging by measuring streaming potentials |
Jan. 24, 1984 |
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