Patents Examined by Alison K. Pizkard
  • Seal structure for downhole tool
    Patent number: 6565093
    Abstract: A seal structure is provided for a downhole tool. In a described embodiment, a seal structure includes a seal support ring having at least one annular groove formed thereon and a longitudinal axis. At least one seal is included in the seal structure. The seal is disposed at least partially in the groove, and the seal is bonded to the ring. An annular recess is positioned longitudinally between opposing side walls of the groove. The recess may be formed in a body of the seal.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: May 20, 2003
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Stephen L. Crow, William D. Henderson, Timothy E. Harms, Robert W. Crow, Ralph Jones
  • Seal material having anisotropic properties
    Patent number: 6517080
    Abstract: A material comprised of two different polymers so that the material exhibits anisotropic properties. The anisotropic properties exhibit hardness and wear resistance along with flexibility. The anisotropic material is made up of a hard segment polymer and a soft segment polymer having contact with each other. This anisotropic material can be used to make seals, which exhibit these same properties and are therefore appropriate for use in high-pressure situations, where they will have a longer life than seals currently on the market.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: February 11, 2003
    Assignee: Caterpillar Inc
    Inventor: Jonathan W. Pressler