Resources Contact Us Home
Method and apparatus for measuring characteristics of geological formations

Image Number 4 for United States Patent #6703838.

An electromagnetic tomography system for determining properties of geological formation penetrated by at least one borehole lined with a conductive tubular includes a transmitter disposed in a first borehole and adapted to induce a magnetic field, a first receiver disposed in the first borehole and adapted to detect a magnetic field induced in the conductive tubular by the transmitter, and a second receiver adapted to detect a magnetic field induced in the geological formation by the transmitter. A method for determining a conductive tubular correction constant includes generating a magnetic field inside a representative piece of the conductive tubular, determining a first magnetic field amplitude inside the representative piece of the conductive tubular at a location proximate to a position of the generating a magnetic field, determining a second magnetic field amplitude outside the representative piece of the conductive tubular, and deriving the conductive tubular correction constant from a ratio of the first magnetic field amplitude and the second magnetic field amplitude.

  Recently Added Patents
Wind farm, wind power plant in a wind farm and operating control for this purpose
Image sorting device, method, program, and integrated circuit and storage medium storing said program
Method and system for checking citations
High-speed comparator with asymmetric frequency response
Visual model importation
Soybean cultivar CL0911444
System and method for reducing antivirus false positives
  Randomly Featured Patents
Power take-off for four wheel drive vehicles
Memory cell arrays and methods for producing memory cell arrays
Markers for detection of chromosome 16 rearrangements
Kinetic munition or projectile with controlled, non-lethal effects
Method for operating a real-time expert system in a graphical programming environment
Detergent compositions
Searcher detection metrics
Method for making random laid bonded continuous filament cloth
Machining condition determining system and method for sinker electric discharge machining apparatus
Redundant systems for downhole permanent installations