Patents by Inventor Bill B. Parker

Bill B. Parker 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).

  • Mud retaining valve
    Patent number: 4128108
    Abstract: A valve adapted for insertion in a radially enlarged portion of the kelly saver sub to retain mud in the kelly when the drill pipe is disconnected therefrom, including a tubular body with a downwardly extending closure member supported thereby, and a piston having an axial passage for the flow of drilling mud therethrough, axially movble within the body. The plug may be removed from the bore by the application of an upwardly directed tension force thereto, so that wire line tools may be run through the bore and the passage.
    Type: Grant
    Filed: April 20, 1977
    Date of Patent: December 5, 1978
    Assignee: American International Tool Company, Inc.
    Inventors: Bill B. Parker, Rudy Beynand, Arthur J. Cormier