Patents by Inventor Joseph M. Barker

Joseph M. Barker 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).

  • Patent number: 11965719
    Abstract: A shaped charge liner may include a plurality of liner segments for a shaped charge configured to perforate a sidewall of a wellbore upon detonation. The plurality of liner segments may include a tip liner segment comprising a first group of compacted metal powder having a hollow cone shape with a trailing interface end disposed opposite a tip end. The tip liner segment is configured to be disposed in a shaped charge casing of the shaped charge. The plurality of liner segments may also include a base liner segment comprising a second group of compacted metal powder having a truncated hollow cone shape with a trailing base end disposed opposite a leading base interface end. The trailing base end has a larger diameter than the leading base interface end, and the base liner segment is configured to be disposed at least partially within the shaped charge casing.
    Type: Grant
    Filed: May 10, 2022
    Date of Patent: April 23, 2024
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Christopher C. Hoelscher, Joseph Todd MacGillivray, James M. Barker
  • Patent number: D412272
    Type: Grant
    Filed: August 19, 1997
    Date of Patent: July 27, 1999
    Assignee: Hand Tool Design Corporation
    Inventors: David S. Culberson, Charles E. Anderson, Joseph M. Barker, James R. Mount