Patents by Inventor Andrei N. Plop

Andrei N. Plop 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).

  • Optimized liner thickness for positive displacement drilling motors
    Patent number: 6604921
    Abstract: A stator for a positive displacement motor including an external tube. The external tube includes an outer surface and an inner surface, and the inner surface includes at least two radially inwardly projecting lobes extending helically along a length of the external tube. A liner is positioned adjacent the inner surface, and the liner conforms to the radially inwardly projecting lobes formed on the inner surface and to the helical shape of the inner surface. A thickness of the liner is at a maximum at the at least two radially inwardly projecting lobes.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: August 12, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: Andrei N. Plop, Vernon E. Koval
  • OPTIMIZED LINER THICKNESS FOR POSITIVE DISPLACEMENT DRILLING MOTORS
    Publication number: 20030138338
    Abstract: A stator for a positive displacement motor including an external tube. The external tube includes an outer surface and an inner surface, and the inner surface includes at least two radially inwardly projecting lobes extending helically along a length of the external tube. A liner is positioned adjacent the inner surface, and the liner conforms to the radially inwardly projecting lobes formed on the inner surface and to the helical shape of the inner surface. A thickness of the liner is at a maximum at the at least two radially inwardly projecting lobes.
    Type: Application
    Filed: January 24, 2002
    Publication date: July 24, 2003
    Inventors: Andrei N. Plop, Vernon E. Koval