Patents by Inventor Michael E. Krugh

Michael E. Krugh 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).

  • Process for cleaning an oil field well bore hole using an internal casing wiper
    Patent number: 4603739
    Abstract: The invention provides a process for using an internal casing wiper tool 10 to wipe the casing sides 10 of a well bore hole 30 in order to remove debris 60 contained thereon and further to remove debris 60 contained in fluid found in the bore hole 30. The tool includes a first chamber 210 for collecting larger sized pieces 430 of debris 60 and a second chamber 300 for collecting the smaller sized pieces 440 of debris 60 as the tool is lowered into the well bore hole 30.
    Type: Grant
    Filed: January 22, 1985
    Date of Patent: August 5, 1986
    Assignee: Marathon Oil Company
    Inventor: Michael E. Krugh
  • Internal casing wiper for an oil field well bore hole
    Patent number: 4515212
    Abstract: The invention provides for an improved internal casing wiper tool 10 designed to wipe the casing sides 10 of a well bore hole 30 in order to remove debris 60 contained thereon and further to remove debris 60 contained in fluid found in the bore hole 30. The tool of the present invention includes a first chamber 210 for collecting larger sized pieces 430 of debris 60 and a second chamber 300 for collecting the smaller sized pieces 440 of debris 60 as the tool is lowered into the well bore hole 30.
    Type: Grant
    Filed: January 20, 1983
    Date of Patent: May 7, 1985
    Assignee: Marathon Oil Company
    Inventor: Michael E. Krugh