Patents by Inventor Fokko H. C. Doornbosch

Fokko H. C. Doornbosch 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).

  • Device for the focus and control of dynamic underbalance or dynamic overbalance in a wellbore
    Patent number: 8726996
    Abstract: A downhole tool assembly for use in a wellbore includes a tubular body carrying an explosive which is selectively detonated to create a dynamic underbalance or overbalance effect in the wellbore. The tubular body has opposite ends provided with plug assemblies including plug elements movable between a normally collapsed state and an actuable expanded state. The plug elements are adapted to be actuated to the expanded state between the tubular body and an outer extent of the wellbore before the creation of the dynamic underbalance or overbalance effect to isolate a discrete segment of the wellbore to which the dynamic underbalance or overbalance effect is confined.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: May 20, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Adil Mahallab Al Busaidy, Karim Al Sayed, Fokko H. C. Doornbosch, Carlos E. Baumann, Lawrence A. Behrmann, Harvey Williams, Andrew J. Martin
  • Device for the Focus and Control of Dynamic Underbalance or Dynamic Overbalance in a Wellbore
    Publication number: 20110132608
    Abstract: A downhole tool assembly for use in a wellbore includes a tubular body carrying an explosive which is selectively detonated to create a dynamic underbalance or overbalance effect in the wellbore. The tubular body has opposite ends provided with plug assemblies including plug elements movable between a normally collapsed state and an actuable expanded state. The plug elements are adapted to be actuated to the expanded state between the tubular body and an outer extent of the wellbore before the creation of the dynamic underbalance or overbalance effect to isolate a discrete segment of the wellbore to which the dynamic underbalance or overbalance effect is confined.
    Type: Application
    Filed: May 28, 2010
    Publication date: June 9, 2011
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Adil Mahallab Al Busaidy, Karim Al Sayed, Fokko H. C. Doornbosch, Carlos E. Baumann, Lawrence A. Behrmann, Harvey Williams, Andrew J. Martin