Patents Assigned to Vallourec Mannesmann Oil & Gas Germany GmbH
  • Patent number: 6511102
    Abstract: A pipe connector having a pin element having a tapered outer threaded section between an external shoulder and a pin end face, a first threadless pin section between the external shoulder and the outer threaded section, and a second threadless pin section between the outer threaded section and the pin end face. Provided for threaded engagement with the pin element is a box element having a tapered inner threaded section between an internal shoulder and a box end face, a first threadless box section between the internal shoulder and the inner threaded section, and a second threadless box section between the inner threaded section and the box end face. Suitably, the second threadless pin section and the first threadless box section in the area of the internal joint is at least twice as long as the first threadless pin section and the second threadless box section in the area of the external joint.
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: January 28, 2003
    Assignee: Vallourec Mannesmann Oil & Gas Germany GmbH
    Inventors: Gerhard Krug, Friedrich Lenze, Erich Quadflieg