Patents by Inventor Sen T. Chen

Sen T. Chen 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).

  • Narrow band magnetostrictive acoustic source
    Patent number: 5239514
    Abstract: A downhole seismic source for producing seismic waves in the 0.2-5 KHz frequency with a bandwidth of between 5 and 50 Hz is formed from a magnetostrictive bar with undamped end weights.
    Type: Grant
    Filed: October 9, 1992
    Date of Patent: August 24, 1993
    Assignee: Exxon Production Research Company
    Inventors: Graham A. Winbow, Sen T. Chen
  • Narrow band acoustic source
    Patent number: H1308
    Abstract: A seismic source for downhole use is disclosed which is formed by an outer tubular member having weighted ends which carries within a coaxially mounted tubularly shaped piezoelectric element. The piezoelectric element is cyclically driven to produce a standing wave having a frequency in the range of 0.25 to 5 kHz and a narrow bandwidth in the range of 5-50 Hz.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: May 3, 1994
    Assignee: Exxon Production Research Company
    Inventors: Graham A. Winbow, Sen T. Chen