Resources Contact Us Home
Oil well acoustic logging tool with baffles forming an acoustic waveguide

Image Number 4 for United States Patent #6868036.

An acoustic logging tool includes external baffle assemblies forming a waveguide structure at the acoustic source. The logging tool is designed for acoustic logging of earth formation surrounding a borehole. The external baffle assemblies form a waveguide structure that is designed to increase signal to noise ratio in an acoustic logging tool using dipole or other acoustic waves. In a preferred embodiment, the acoustic logging tool includes an elongated transmitter module, and a receiver sonde having a linear array of acoustic receivers. The transmitter module includes first and second cylindrical masses spaced apart along the axis by first and second spacers. The first cylindrical mass defines a first circular facing surface and a first cylindrical outer surface. The second cylindrical mass defines a second circular facing surface and a second cylindrical outer surface. A multi-pole acoustic source is fixedly mounted between the first and second circular facing surfaces, and located on the transmitter module axis between the first and second spacers. A first annular baffle assembly surrounding the first cylindrical outer surface has a first annular facing surface co-planar with the first circular facing surface. A second annular baffle assembly surrounding the second cylindrical outer surface has a second annular facing surface co-planar with the second circular facing surface. The annular baffle assemblies form an acoustic waveguide.

  Recently Added Patents
Processing autocomplete suggestions
Semiconductor apparatus
Compact multi-functional scanning apparatus with retractable flatbed scanner
Method and system and policy server for guaranteeing data not to be interrupted
Image reading apparatus, image reading method and program
Field emission cathode device and field emission display using the same
Method and receiver for jointly decoding received communication signals using maximum likelihood detection
  Randomly Featured Patents
Inserting device for a barbed tissue connector
Deck structure for personal watercraft
Coarse frequency burst detector for a wireline communications system
Anti-caking solids
Method and apparatus for solder joint integrity assessment
Torte plate
Vapor processor with condensate reflux
Single chamber gas discharge laser with line narrowed seed beam
Method and apparatus to provide a burn-in board with increased monitoring capacity