Patents by Inventor David Eric Johnston

David Eric Johnston 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).

  • SYSTEMS AND METHODS FOR RUNNING TUBULARS INTO SUBTERRANEAN WELLBORES
    Publication number: 20150275590
    Abstract: A guide assembly for running a liner through a borehole extending through a subterranean formation, the guide assembly having a central axis, a first end configured to be coupled to the liner, and a second end opposite the first end. The guide assembly includes a guide shoe disposed at the second end, a drive assembly including a radially outer housing, and a rotor concentrically disposed in the housing. The rotor has a first end distal the guide shoe and a second end fixably coupled to the guide shoe, and is configured to rotate about the central axis relative to the housing about the central axis.
    Type: Application
    Filed: March 26, 2015
    Publication date: October 1, 2015
    Inventors: Carl William Diller, Candice English, Robert D. Harris, David Eric Johnston, John Robert Milne, Matthew Ora Ross