Resources Contact Us Home
Method and apparatus for creating an image of an earth borehole or a well casing

Image Number 4 for United States Patent #5987385.

An acoustic logging tool, useful for creating a circumferential image of an earth borehole or well casing, which includes one or many acoustic transceivers mounted in substantially the same plane, in a drill string sub. The mounting receptacles are located in blocks, flexibly mounted in fixed inserts within the interior of the drill string sub. Each of the transceivers is structured to provide temperature and pressure compensation. The echo signals received by the transceivers are digitized and processed to eliminate extraneous noise created by the ringing of the transducers, by the signals reflected from the material backing the transducer ultrasonic element, and by any other sources inherent to the drilling environment. Digitization and further processing also allows for signal enhancement, thus allowing detection of signals in the presence of substantial noise. Temperature and pressure determinations are used to correct the acoustic velocity of the waves passing through the drilling fluid, "on-the-fly", as the drilling process continues.

  Recently Added Patents
Fabrication of thin pellicle beam splitters
Control unit of a ride level control system, and ride level control system
Malicious attack detection and analysis
Lighting device with device for regulating the illumination according to the luminance of the illumination field and corresponding use
Battery pack with interchangeable circuit substrates
Personal warming apparatus
  Randomly Featured Patents
Unit for forming a continuous mat of tobacco
Apparatus for providing improved game port operation in a computer
Method and apparatus for tissue disaggregation
Hydraulic binder and cement compositions containing photocatalyst particles
Transdermal drug delivery by electroincorporation of vesicles
Multilayer capacitor
Method of quantifying performance chemicals in pulp and paper
Process for preparing metal oxide slurries suitable for the chemical mechanical polishing of semiconductors
Image forming apparatus and method