Patents by Inventor Marc E. Leveque

Marc E. Leveque 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).

  • Rotatable drill shoe
    Patent number: 7275605
    Abstract: A rotatable drilling shoe attachable to a section of casing that allows for drilling and casing of a well bore in a single trip. The drilling shoe includes a fixed section and a rotatable section that has a drillable bit attached thereto. The drilling shoe further includes a mechanism for inhibiting rotation of the rotatable section after the casing is cemented into place so that the drillable bit can be drilled out by a subsequent drilling operation.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: October 2, 2007
    Assignee: ConocoPhillips Company
    Inventors: Kenneth L. Smith, Edward T. Cousins, Marc E. Leveque, Gary J. Collins