Patents by Inventor Axel Kulgemeyer

Axel Kulgemeyer 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).

  • Low alloy steel with a high yield strength and high sulphide stress cracking resistance
    Patent number: 9394594
    Abstract: A steel contains, by weight: C: 0.3% to 0.5%, Si: 0.1% to 0.5%, Mn: 0.1% to 1%, P: 0.03% or less, S: 0.005% or less, Cr: 0.3% to 1.5%, Mo: 1.0% to 1.5%, Al: 0.01% to 0.1%, V: 0.03% to 0.06%, Nb: 0.04% to 0.15%, Ti: 0 to 0.015%, N: 0.01% or less, the remainder of the chemical composition of the steel being constituted by Fe and impurities or residuals resulting from or necessary to steel production and casting processes. The steel enables to produce seamless tubes with a yield strength after heat treatment of 862 MPa or more which are particularly SSC-resistant.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: July 19, 2016
    Assignee: VALLOUREC OIL AND GAS FRANCE
    Inventors: Christoph Bosch, Axel Kulgemeyer, Jean Leyer, Michel Piette
  • LOW ALLOY STEEL WITH A HIGH YIELD STRENGTH AND HIGH SULPHIDE STRESS CRACKING RESISTANCE
    Publication number: 20110315276
    Abstract: A steel contains, by weight: C: 0.3% to 0.5%, Si: 0.1% to 0.5%, Mn: 0.1% to 1%, P: 0.03% or less, S: 0.005% or less, Cr: 0.3% to 1.5%, Mo: 1.0% to 1.5%, Al: 0.01% to 0.1%, V: 0.03% to 0.06%, Nb: 0.04% to 0.15%, Ti: 0 to 0.015%, N: 0.01% or less, the remainder of the chemical composition of the steel being constituted by Fe and impurities or residuals resulting from or necessary to steel production and casting processes. The steel enables to produce seamless tubes with a yield strength after heat treatment of 862 MPa or more which are particularly SSC-resistant.
    Type: Application
    Filed: February 12, 2010
    Publication date: December 29, 2011
    Applicant: VALLOUREC MANNESMANN OIL & GAS FRANCE
    Inventors: Christoph Bosch, Axel Kulgemeyer, Jean Leyer, Michel Piette