Patents by Inventor Harold Hedberg

Harold Hedberg 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).

  • Coax-slickline cable for use in well logging
    Patent number: 5894104
    Abstract: A slick-line coax cable for use in downhole well-logging under conditions which would normally prevent logging with standard `stranded` line cables includes a device for preventing migration of fluid inside the cable, a coaxial conductive layer of metal to allow more efficient data transfer from the downhole logging tools to the surface recording equipment, and a seal for terminating the downhole end of the metal-encapsulated cable thereby preventing downhole pressure and fluid migration into the cable.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: April 13, 1999
    Assignee: Schlumberger Technology Corporation
    Inventor: Harold Hedberg