Patents by Inventor Nihal Ian Wijeyesekera

Nihal Ian Wijeyesekera 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).

  • Formation evaluation through azimuthal measurements
    Patent number: 6944548
    Abstract: A method for formation logging includes acquiring measurements of neutron-induced signals having azimuthal information using a neutron tool; processing the measurements into a plurality of azimuthal sector data for each acquisition interval; and deriving a selected parameter from the plurality of azimuthal sector data. A logging tool includes a housing adapted to move in a borehole; a circuitry having memories for storing neutron-induced measurements; a neutron source disposed in the housing; and at least one detector bank disposed in the housing spaced apart from the neutron source, wherein each of the at least one detector bank comprises at least one detector disposed around a periphery of the housing such that the at least one detector is more sensitive to signals from an azimuthal direction, and wherein count rates detected by each of the at least one detector are separately stored in the memories.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: September 13, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: Richard J. Radtke, Michael L. Evans, Robert A. Adolph, Loïc Vildé , Nihal Ian Wijeyesekera
  • Formation evaluation through azimuthal measurements
    Publication number: 20040128073
    Abstract: A method for formation logging includes acquiring measurements of neutron-induced signals having azimuthal information using a neutron tool; processing the measurements into a plurality of azimuthal sector data for each acquisition interval; and deriving a selected parameter from the plurality of azimuthal sector data. A logging tool includes a housing adapted to move in a borehole; a circuitry having memories for storing neutron-induced measurements; a neutron source disposed in the housing; and at least one detector bank disposed in the housing spaced apart from the neutron source, wherein each of the at least one detector bank comprises at least one detector disposed around a periphery of the housing such that the at least one detector is more sensitive to signals from an azimuthal direction, and wherein count rates detected by each of the at least one detector are separately stored in the memories.
    Type: Application
    Filed: December 30, 2002
    Publication date: July 1, 2004
    Inventors: Richard J. Radtke, Michael L. Evans, Robert A. Adolph, Loic Vilde, Nihal Ian Wijeyesekera