Patents by Inventor Rolf Ludolf

Rolf Ludolf 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).

  • Apparatus and method for inserting and retrieving a tool string through well surface equipment
    Patent number: 6719061
    Abstract: Well surface equipment is provided to seal around the outer surface of portions of tool sections as the tool sections are assembled or disconnected in a portion of the well surface equipment. The portion of the well surface equipment is isolated from wellhead pressure to enhance well operator control during assembly or disassembly of a tool string. Also, if a fluid path is opened up due to activation of the tool string (such as initiation of a detonating cord that is placed in the fluid path), a barrier mechanism is actuated to block fluid communication through this fluid path so that a portion of the well surface equipment can remain isolated from wellhead pressure to enable convenient retrieval and disconnection of tool sections.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: April 13, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Laurent E. Muller, Larry L. Grigar, Steven W. Henderson, Klaus B. Huber, Bennie C. Gill, Rolf Ludolf, Gary L. Rytlewski
  • Apparatus and method for inserting and retrieving a tool string through well surface equipment
    Publication number: 20020185276
    Abstract: Well surface equipment is provided to seal around the outer surface of portions of tool sections as the tool sections are assembled or disconnected in a portion of the well surface equipment. The portion of the well surface equipment is isolated from wellhead pressure to enhance well operator control during assembly or disassembly of a tool string. Also, if a fluid path is opened up due to activation of the tool string (such as initiation of a detonating cord that is placed in the fluid path), a barrier mechanism is actuated to block fluid communication through this fluid path so that a portion of the well surface equipment can remain isolated from wellhead pressure to enable convenient retrieval and disconnection of tool sections.
    Type: Application
    Filed: June 7, 2002
    Publication date: December 12, 2002
    Inventors: Laurent E. Muller, Larry L. Grigar, Steven W. Henderson, Klaus B. Huber, Bennie C. Gill, Rolf Ludolf, Gary L. Rytlewski