Resources Contact Us Home
Acoustic well logging device for detecting compressional and shear waves

Image Number 5 for United States Patent #4516228.

A borehole logging system employs a compressional wave transmitter and a shear wave transmitter. The transmitters are alternately fired to impart compressional and shear waves into the formations surrounding the borehole. A bender-type receiver, spaced apart from the transmitter in the borehole is alternately gated so that the voltages across its pair of piezoelectric planar surfaces are subtracted during the expected time period of symmetrical motion of the receiver to provide a compressional wave output and added during the expected arrival time period of unsymmetrical motion of the receiver to provide a shear wave output.

  Recently Added Patents
Process for improving the hydrolysis of cellulose in high consistency systems using one or more unmixed and mixed hydrolysis reactors
Battery loading and unloading mechanism
Phenethanolamine derivatives for treatment of respiratory diseases
Semiconductor unit having a power semiconductor and semiconductor apparatus using the same
Managing deduplication density
Light-emitting device
Electric discharge machining hole drilling
  Randomly Featured Patents
Antenna supervising apparatus comprising a standing wave ratio measuring unit
Camera system and associated method for removing reset noise and fixed offset noise from the output of an active pixel array
Cleaning device and image forming apparatus using the same
Projection screen
Butchering saw
Lamp for bikes
Process for preparing p-phenylenediamines
Shutter for display device of projection type
Method, system, and computer program product for over-the-air download to satellite radio
Combination connector