Patents Represented by Attorney David Delos Larson

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  • Method and apparatus for composition analysis in a logging environment
    Patent number: 7279678
    Abstract: Methods and apparatus for analyzing a hydrocarbon mixture are disclosed, comprising at least one light-emitting diode (LED) and at least one photodetector positioned to detect energy transmitted by the LED through a sample of the hydrocarbon mixture. In at least one embodiment an optical filter is coupled to the output of the LED to mitigate the adverse effects of the LED's sensitivity to temperature.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: October 9, 2007
    Assignee: Schlumber Technology Corporation
    Inventors: A. Ballard Andrews, Jacques Jundt, Robert J. Schroeder, Bhavani Raghuraman, Oliver C. Mullins