Patents by Inventor Frank Koehrmann

Frank Koehrmann 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).

  • Drilling and cementing casing system
    Patent number: 7234546
    Abstract: A method and associated equipment are disclosed which allow drilling at least a portion of a well and subsequently cementing casing in a single trip. The method is particularly suited for deep-water offshore operations where the drill string can be run through a section of casing leaving a bit and an under-reamer extending out below. The casing is equipped with ports through which cement can be pumped as well as an external casing packer to prevent the uncured cement in the annulus from U-tubing. Several casing sections can be run in during drilling and cemented succession using the one trip method.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: June 26, 2007
    Assignee: Baker Hughes Incorporated
    Inventors: Ray P. Vincent, Frank Koehrmann, George E. Givens, Christiaan D. Krauss, Edward T. Wood, Friedhelm Makohl, David B. Haughton
  • Drilling and cementing casing system
    Publication number: 20040003944
    Abstract: A method and associated equipment are disclosed which allow drilling at least a portion of a well and subsequently cementing casing in a single trip. The method is particularly suited for deep-water offshore operations where the drill string can be run through a section of casing leaving a bit and an under-reamer extending out below. The casing is equipped with ports through which cement can be pumped as well as an external casing packer to prevent the uncured cement in the annulus from U-tubing. Several casing sections can be run in during drilling and cemented succession using the one trip method.
    Type: Application
    Filed: April 2, 2003
    Publication date: January 8, 2004
    Inventors: Ray P. Vincent, Frank Koehrmann, George E. Givens, Christiaan D. Krauss, Edward T. Wood, Friedhelm Makohl, David B. Haughton