Patents Assigned to Prakla Seismos AG
  • Method for recording seismic data
    Patent number: 4965773
    Abstract: A procedure for surveying the seismic data of a region comprising a central body or structure, for instance an island, by means of a ship-towed streamer, wherein the ship follows a spiral path (2) around the central structure (1) to collected seismic data. Preferably the spiral is an Archimedean spiral with equidistant individual spiral line segments (7, 8, 9).
    Type: Grant
    Filed: December 9, 1988
    Date of Patent: October 23, 1990
    Assignee: Prakla-Seismos AG
    Inventor: Roland Marschall
  • Method and apparatus for presenting seismic traces
    Patent number: 4922466
    Abstract: A method and apparatus for immediate, substantially real-time representation of the traces of seismic measurements in which the exponents and sign of the signal sample from the stream of data transmitted to a data recording unit (2) are uncoupled and are displayed as gradations of color on a monitor (6) of a personal computer. in this manner a quick overview of the measurement can be obtained, and the correctness of the installation and the operability of the receivers can be determined.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: May 1, 1990
    Assignee: Prakla-Seismos AG
    Inventor: Burkhard Schmidt
  • Procedure for seismic surveying
    Patent number: 4870624
    Abstract: A procedure for seismically surveying a region, in particular a marine region, wherein objects such as drilling platforms (1,2,3) prevent surveying by conventional seismic means such as towed streamers. In the invention, the total region first divided into sub-regions (5,6,7) wherein receiver chains (4) are stationarily mounted between two of the objects. A sound transmitter is the moved relative to the chain of receivers along a grid as the transmitter is repeatedly, periodically activated. Data collected by the receivers are recorded for each sub-region and the completely surveyed sub-regions are combined by grid transformation to construct a uniform three-dimensional data volume.
    Type: Grant
    Filed: December 9, 1988
    Date of Patent: September 26, 1989
    Assignee: Prakla-Seismos AG
    Inventor: Roland Marschall
  • Process and apparatus for analyzing and controlling energy transfer to the ground
    Patent number: 4755976
    Abstract: A method and apparatus for determining the occurrence and behavior of energy transference processes to the ground includes a vibrator which transfer seismic energy to the ground. Force and velocity signals are derived from acceleration signals measured at the baseplate and a reaction mass. The signals are filtered and multiplied together. The output components are separated and used for regulating the vibrator or for determining transference losses in the soil.
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: July 5, 1988
    Assignee: Prakla Seismos AG
    Inventor: Hans A. K. Edelmann