Patents by Inventor Henrik Praesius

Henrik Praesius 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).

  • Gun brake device
    Patent number: 6817598
    Abstract: The present invention provides a gun brake system adapted to slow the descent of a tool string in a well. In one embodiment, the brake system comprises a brake installed within the well and having a snug fitting restriction and one or more fluid channels extending along a portion thereof. The brake system further provides means for maintaining the fluid volume substantially constant within the production tubing to which the gun brake is installed.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: November 16, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Robert A. Parrott, Stephen F. Lloyd, Gerhard Schoonderbeek, Atilla Kaplan, Henrik Praesius, Kuo-Chiang Chen
  • Gun brake device
    Publication number: 20030089504
    Abstract: The present invention provides a gun brake system adapted to slow the descent of a tool string in a well. In one embodiment, the brake system comprises a brake installed within the well and having a snug fitting restriction and one or more fluid channels extending along a portion thereof. The brake system further provides means for maintaining the fluid volume substantially constant within the production tubing to which the gun brake is installed.
    Type: Application
    Filed: October 25, 2002
    Publication date: May 15, 2003
    Inventors: Robert A. Parrott, Stephen F. Lloyd, Gerhard Schoonderbeek, Atilla Kaplan, Henrik Praesius, Kuo-Chiang Chen