Patents by Inventor Peter ENDENBURG

Peter ENDENBURG 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).

  • Surge immune stage system for wellbore tubular cementation
    Patent number: 10246968
    Abstract: A method for cementing a tubular string into a wellbore includes: running the tubular string into the wellbore using a workstring having a deployment assembly; delivering an opener activator through the workstring to the deployment assembly, thereby launching an opener plug from the deployment assembly; pumping the opener activator and plug to a stage valve of the tubular string, thereby opening the stage valve; pumping cement slurry into the workstring; pumping a closer activator through the workstring behind the cement slurry, thereby launching a closer plug from the deployment assembly; and pumping the closer activator and plug to the open stage valve, thereby driving the cement slurry into an annulus between the tubular string and the wellbore and closing the stage valve.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: April 2, 2019
    Assignee: Weatherford Netherlands, B.V.
    Inventors: Marcel Budde, Peter Endenburg, Ivan Andre Barannikow
  • SURGE IMMUNE STAGE SYSTEM FOR WELLBORE TUBULAR CEMENTATION
    Publication number: 20150330181
    Abstract: A method for cementing a tubular string into a wellbore includes: running the tubular string into the wellbore using a workstring having a deployment assembly; delivering an opener activator through the workstring to the deployment assembly, thereby launching an opener plug from the deployment assembly; pumping the opener activator and plug to a stage valve of the tubular string, thereby opening the stage valve; pumping cement slurry into the workstring; pumping a closer activator through the workstring behind the cement slurry, thereby launching a closer plug from the deployment assembly; and pumping the closer activator and plug to the open stage valve, thereby driving the cement slurry into an annulus between the tubular string and the wellbore and closing the stage valve.
    Type: Application
    Filed: May 12, 2015
    Publication date: November 19, 2015
    Inventors: Marcel BUDDE, Peter ENDENBURG, Ivan Andre BARANNIKOW