Patents by Inventor Robert Albertus Van Dijk

Robert Albertus Van Dijk 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).

  • Drilling system with expandable sleeve
    Patent number: 7159673
    Abstract: A drilling system and method for drilling a borehole into an earth formation is provided. The drilling system has a drill string having a lower section provided with a sleeve which is radially expandable from a retracted mode in which the sleeve extends around the lower drill string section and is releasably connected thereto, to an expanded mode in which the sleeve is released from the lower drill string section and is expanded against the borehole wall. The drilling system further has a control means for selectively releasing the sleeve from the lower drill string section and expanding the sleeve against the borehole wall.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: January 9, 2007
    Assignee: Shell Oil Company
    Inventor: Robert Albertus Van Dijk
  • Drilling system with expandable sleeve
    Publication number: 20040144568
    Abstract: A drilling system and method for drilling a borehole into an earth formation is provided. The drilling system comprises a drill string (1) having a lower section provided with a sleeve (7) which is radially expandable from a retracted mode in which the sleeve extends around said lower drill string section and is releasably connected thereto, to an expanded mode in which the sleeve is released from the lower drill string section and is expanded against the borehole wall. The drilling system further comprises control means (10) for selectively releasing the sleeve (7) from the lower drill string section and expanding the sleeve against the borehole wall.
    Type: Application
    Filed: October 27, 2003
    Publication date: July 29, 2004
    Inventor: Robert Albertus Van Dijk