Patents by Inventor Edwin Kubena, Jr.

Edwin Kubena, Jr. 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 stabilizing boreholes
    Patent number: 5211250
    Abstract: A method of stabilizing a wellbore being drilled through both shale and sandstone zones. A shale stabilizing agent and finely divided particulate material are combined in a water based drilling fluid to provide the stabilization.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: May 18, 1993
    Assignee: Conoco Inc.
    Inventors: Edwin Kubena, Jr., Lee E. Whitebay, James A. Wingrave
  • Method of controlling lost circulation in well drilling
    Patent number: 4957174
    Abstract: Loss of drilling fluid into a subterranean formation penetrated in the drilling of a well is controlled by addition to the drilling fluid of a lost circulation material comprising petroleum coke.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: September 18, 1990
    Assignee: Conoco Inc.
    Inventors: Donald L. Whitfill, Edwin Kubena, Jr., Terry S. Cantu, Matthew C. Sooter