Patents by Inventor Claas Van Der Zwaag

Claas Van Der Zwaag 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).

  • Method of adjusting properties of drilling fluids and apparatus for use in such methods
    Patent number: 9194972
    Abstract: The present invention provides a method of determining a physiochemical property of a drilling fluid at a drilling site during a drilling phase, said method comprising detecting a nuclear magnetic resonance signal from out-of-hole drilling fluid at said site and calculating therefrom a value indicative of said property.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: November 24, 2015
    Assignee: STATOIL PETROLEUM AS
    Inventors: Claas Van Der Zwaag, Arild Saasen, Tor Henry Omland, Per Amund Amundsen
  • METHOD OF ADJUSTING PROPERTIES OF DRILLING FLUIDS AND APPARATUS FOR USE IN SUCH METHODS
    Publication number: 20120013335
    Abstract: The present invention provides a method of determining a physiochemical property of a drilling fluid at a drilling site during a drilling phase, said method comprising detecting a nuclear magnetic resonance signal from out-of-hole drilling fluid at said site and calculating therefrom a value indicative of said property.
    Type: Application
    Filed: March 2, 2010
    Publication date: January 19, 2012
    Applicant: STATOIL ASA
    Inventors: Arild Saasen, Claas Van Der Zwaag, Tor Henry Omland, Per Amund Amundsen