Patents by Inventor Sergey Asvadurov

Sergey Asvadurov 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).

  • Quadrupole acoustic shear wave logging while drilling
    Patent number: 7257489
    Abstract: A tool generates signals indicative a shear wave slowness of the formation surrounding a borehole. The tool comprises a collar portion adapted for mounting in a drill string, a quadrupole sonic transmitter mounted to the collar portion, and a quadrupole sonic receiver array mounted to the collar spaced apart from the transmitter. A method determines shear wave slowness of the formation. The method includes propagating quadrupole wave energy into the formation and detecting quadrupole dispersive waveform received at a second location. Formation shear wave slowness is calculated using dispersive slowness time coherence processing.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: August 14, 2007
    Assignee: Schlumberger Technology Corporation
    Inventors: Chaur-Jian Hsu, Jahir A. Pabon, Bikash K. Sinha, Sergey Asvadurov
  • Quadrupole acoustic shear wave logging while drilling
    Publication number: 20050000688
    Abstract: A tool generates signals indicative a shear wave slowness of the formation surrounding a borehole. The tool comprises a collar portion adapted for mounting in a drill string, a quadrupole sonic transmitter mounted to the collar portion, and a quadrupole sonic receiver array mounted to the collar spaced apart from the transmitter. A method determines shear wave slowness of the formation. The method includes propagating quadrupole wave energy into the formation and detecting quadrupole dispersive waveform received at a second location. Formation shear wave slowness is calculated using dispersive slowness time coherence processing.
    Type: Application
    Filed: September 9, 2002
    Publication date: January 6, 2005
    Inventors: Chaur-Jian Hsu, Jahir Pabon, Bikash Sinha, Sergey Asvadurov