Patents by Inventor Randolph J. Walser

Randolph J. Walser 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 determining the thermal neutron capture cross-section of a subsurface formation from a borehole
    Patent number: 7439494
    Abstract: Data acquired using a pulsed nuclear source are susceptible to two sources of error. One error is due to large statistical noise towards the end of an acquisition window. Another source of error is the contamination of the early portion of the data by borehole and other effects. The beginning of the processing window is adjusted based on the signal level at the end of the processing window for the preceding pulsing of the source. The end of the processing window is derived from statistical considerations.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: October 21, 2008
    Assignee: Baker Hughes Incorporated
    Inventors: W. Allen Gilchrist, Randolph J. Walser
  • METHOD AND APPARATUS FOR DETERMINING THE THERMAL NEUTRON CAPTURE CROSS-SECTION OF A SUBSURFACE FORMATION FROM A BOREHOLE
    Publication number: 20080156976
    Abstract: Data acquired using a pulsed nuclear source are susceptible to two sources of error. One error is due to large statistical noise towards the end of an acquisition window. Another source of error is the contamination of the early portion of the data by borehole and other effects. The beginning of the processing window is adjusted based on the signal level at the end of the processing window for the preceding pulsing of the source. The end of the processing window is derived from statistical considerations.
    Type: Application
    Filed: January 9, 2007
    Publication date: July 3, 2008
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: W. Allen Gilchrist, Randolph J. Walser
  • Method and apparatus for determining the thermal neutron capture cross-section of a subsurface formation from a borehole
    Patent number: 7166834
    Abstract: Data acquired using a pulsed nuclear source are susceptible to two sources of error. One error is due to large statistical noise towards the end of an acquisition window. Another source of error is the contamination of the early portion of the data by borehole and other effects. The beginning of the processing window is adjusted based on the signal level at the end of the processing window for the preceding pulsing of the source. The end of the processing window is derived from statistical considerations.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: January 23, 2007
    Assignee: Baker Hughes Incorporated
    Inventors: W. Allen Gilchrist, Randolph J. Walser