Induction measuring device in the presence of metal walls

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5654639
SERIAL NO

08571494

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A device for the measurement by induction of a medium through a metal wall using a transmission portion permitting the induction of a signal in the medium beyond the metal wall and a receiver for receiving a signal transmitted by the medium in response to the induced signal. The transmission portion includes at least one current generator directly connected to the metal wall in such a way that the current passing into the wall induces a signal beyond the wall.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
COMMISSARIAT A L'ENERGIE ATOMIQUEPARIS1496

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chaillout, Jean-Jacques St. Etienne de Croney, FR 18 169
Jeandey, Christian St. Egreve, FR 13 156
Locatelli, Marcel Montbonnot, FR 16 188

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (2)
* 4529939 System located in drill string for well logging while drilling 90 1983
* 5283520 Method of determining thickness of magnetic pipe by measuring the time it takes the pipe to reach magnetic saturation 26 1991
 
Mobil Oil Corporation (1)
* 4593770 Method for preventing the drilling of a new well into one of a plurality of production wells 48 1984
 
Halliburton Logging Services, Inc. (1)
* 5038107 Method and apparatus for making induction measurements through casing 45 1989
 
Western Atlas International, Inc. (1)
* 4901023 Methods and apparatus for measurement of low frequency a.c. magnetic fields within cased boreholes to determine properties of geological formations 25 1988
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
HALLIBURTON ENERGY SERVICES, INC. (2)
* 5892460 Logging while drilling tool with azimuthal sensistivity 57 1997
6181138 Directional resistivity measurements for azimuthal proximity detection of bed boundaries 134 1999
 
Other [Check patent profile for assignment information] (3)
* 5841510 Rotatable diagnostic lens for evaluation of the irido-corneal angle, retina and other portions of the eye 17 1998
* 6975120 Measurement of subterranean lithology using electromagnetic energy 7 2002
* 2003/0117,142 Measurement of subterranean lithology using electromagnetic energy 5 2002
 
KJT Enterprises, Inc. (4)
6975121 System for measuring earth formation resistivity through and electrically conductive wellbore casing 7 2004
7388382 System for measuring Earth formation resistivity through an electrically conductive wellbore casing 8 2004
7202671 Method and apparatus for measuring formation conductivities from within cased wellbores by combined measurement of casing current leakage and electromagnetic response 11 2004
* 2006/0028,208 Method and apparatus for measuring formation conductivities from within cased wellbores by combined measurement of casing current leakage and electromagnetic response 7 2004
 
SCHLUMBERGER TECHNOLOGY CORPORATION (10)
6534986 Permanently emplaced electromagnetic system and method for measuring formation resistivity adjacent to and between wells 28 2001
6791331 Method and apparatus for measuring characteristics of geological formations 10 2004
* 2004/0145,370 Method and apparatus for measuring characteristics of geological formations 4 2004
7030617 System, apparatus, and method for conducting electromagnetic induction surveys 18 2004
* 2005/0156,602 System, apparatus, and method for conducting electromagnetic induction surveys 5 2004
* 8310239 Detecting electrical current in a magnetic structure 2 2009
* 2010/0134,112 DETECTING ELECTRICAL CURRENT IN A MAGNETIC STRUCTURE 3 2009
9069097 Surface to borehole electromagnetic surveying using metallic well casings as electrodes 3 2009
* 9625604 Analyzing subterranean formation with current source vectors 0 2013
* 2014/0132,272 Analyzing Subterranean Formation With Current Source Vectors 1 2013
 
EMI, INC. (1)
6294917 Electromagnetic induction method and apparatus for the measurement of the electrical resistivity of geologic formations surrounding boreholes cased with a conductive liner 58 1999
 
EM-Tech Sensors LLC (6)
6657440 Propagation of waves through materials 3 1999
6628118 Method and apparatus for control of magnetic flux direction and concentration 12 2000
6597177 Through casing resistivity measurement in permanently installed downhole production environment 4 2000
* 6744263 Apparatus and method for the measurement of electrical properties of materials through non-magnetizable materials 2 2000
* 6597186 Through tank level gauging 0 2000
6630831 Measurements of electrical properties through non magneticially permeable metals using directed magnetic beams and magnetic lenses 18 2001
 
EM-TECH LLC (3)
6392421 Spectral EM frequency metallic thickness measurement using metallic transparencies 6 2000
6553838 Detection of anomalies on railroad tracks 13 2001
7019518 Non-contacting apparatus and method for measurement of ferromagnetic metal thickness 1 2001
 
Western Atlas International, Inc. (4)
* 6025721 Determining resistivity of a formation adjacent to a borehole having casing by generating constant current flow in portion of casing and using at least two voltage measurement electrodes 24 1996
* 6157195 Formation resistivity measurements from within a cased well used to quantitatively determine the amount of oil and gas present 31 1997
6246240 Determining resistivity of a formation adjacent to a borehole having casing with an apparatus having all current conducting electrodes within the cased well 32 1999
6987386 Determining resistivity of a geological formation using circuitry located within a borehole casing 3 2002
* Cited By Examiner