Patents by Inventor Harry W. Schurr, III

Harry W. Schurr, III 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).

  • Method for cleaning cement plug from wellbore liner
    Patent number: 5282509
    Abstract: A procedure for drilling out a cement plug from a liner top using a drill bit with extendible cutting elements to avoid the need for changing bits during the procedure.
    Type: Grant
    Filed: August 20, 1992
    Date of Patent: February 1, 1994
    Assignee: Conoco Inc.
    Inventor: Harry W. Schurr, III