Patents by Inventor Hadrien Dollfus

Hadrien Dollfus 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).

  • Borehole size determination downhole
    Patent number: 10838097
    Abstract: Methods and apparatus pertaining to determining shape and size of a borehole at a depth within a subterranean formation using ultrasonic measurements obtained by a downhole tool at four different azimuthal locations corresponding to four mutually orthogonal directions extending radially from a central axis of the downhole tool. The measurements are indicative of a distance between a wall of the borehole and the downhole tool at each azimuthal location. The borehole shape and size are determined by estimating an ellipse approximating the borehole shape and size using the ultrasonic measurements.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: November 17, 2020
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Hadrien Dollfus, Henri-Pierre Valero, Jean-Christophe Auchere
  • Borehole Size Determination Downhole
    Publication number: 20190339411
    Abstract: Methods and apparatus pertaining to determining shape and size of a borehole at a depth within a subterranean formation using ultrasonic measurements obtained by a downhole tool at four different azimuthal locations corresponding to four mutually orthogonal directions extending radially from a central axis of the downhole tool. The measurements are indicative of a distance between a wall of the borehole and the downhole tool at each azimuthal location. The borehole shape and size are determined by estimating an ellipse approximating the borehole shape and size using the ultrasonic measurements.
    Type: Application
    Filed: May 4, 2018
    Publication date: November 7, 2019
    Inventors: Hadrien Dollfus, Henri-Pierre Valero, Jean-Christophe Auchere