Patents by Inventor Abe Steiginga

Abe Steiginga 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).

  • CASING ROTARY STEERABLE SYSTEM FOR DRILLING
    Publication number: 20120199399
    Abstract: A system for drilling a deviated borehole, comprises a drill string, a bending mechanism supported on the drill string, a drill bit supported on the bending mechanism such that the axis of the bit does not align with the axis of the drill string where it connects to the bending mechanism, and a liner supported on at least one of the bit and the drill string and having upper and lower ends, wherein the bending mechanism is disposed within the liner such that the upper and lower liner ends are not co-axial.
    Type: Application
    Filed: October 11, 2010
    Publication date: August 9, 2012
    Inventors: John Andrew Henley, Abe Steiginga
  • Assembly for directional drilling of boreholes
    Patent number: 4880066
    Abstract: A directional drilling assembly comprises a downhole drilling motor and stabilizer assembly which stabilizes the drilling assembly in such a manner in the borehole that the drilling bit driven by the output shaft of the downhole motor has a tilted orientation in the borehole. The stabilizer assembly comprises a lowermost stabilizer which is connected to the output shaft of the motor so as to suppress any sticking tendency of said lowermost stabilizer to the borehole wall.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: November 14, 1989
    Assignee: Shell Oil Company
    Inventors: Abe Steiginga, Robert N. Worrall