Patents by Inventor Holger Kinzel

Holger Kinzel 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).

  • Centralizer
    Patent number: 6298883
    Abstract: A centralizer (101) comprises two annular bands (102, 103) which are spaced apart by a plurality of hollow members (104, 105, 106) extending therebetween. The hollow members (104, 105, 106) overlie openings (110-115; 116-121) in the annular bands (102, 103) respectively. In use, fluid can enter and leave the hollow member via the openings. This flow helps maintain a film of fluid between the annular bands (102, 103) and the tubular on which the centralizer is mounted and thus facilitates rotation of the tubular with respect to the centralizer.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: October 9, 2001
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Holger Kinzel