Patents by Inventor Fa S. Dwan

Fa S. Dwan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for detecting shallow water flow sands using converted shear waves
    Patent number: 6311132
    Abstract: A method and apparatus for seismic detection of shallow drilling hazards, especially overpressured shallow waterflow sands. In one embodiment, a seismic survey is performed to obtain both compression and converted shear type seismic data. After processing, the seismic data is analyzed to identify possible correlations between reflection events observable in the shear seismic data and reflection events observable in the compression seismic data. At depths of up to at least 3,500 feet below the sea floor, any such correlation is indicative of the presence of sands.
    Type: Grant
    Filed: October 6, 1999
    Date of Patent: October 30, 2001
    Assignee: Shell Oil Company
    Inventors: Mark L. Rosenquist, Fa S. Dwan, L. Taras Bryndzia, John H. Pelletier