Patents by Inventor Allan T. Lillies

Allan T. Lillies 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).

  • Carbon dioxide fracturing process and apparatus
    Patent number: 4374545
    Abstract: There is described a new and improved method of fracturing an underground stratigraphic formation penetrated by a well bore including the steps of pumping a stream of liquified gas into the formation to cause the fracturing thereof and then introducing proppants directly into the stream of liquified gas for injection of the proppants into the fractures. Prior to introducing the proppants into the liquid gas stream, they are cooled and pressurized to the storage temperature and pressure of the liquified gas.
    Type: Grant
    Filed: January 7, 1982
    Date of Patent: February 22, 1983
    Assignee: L.H.B. Investment, Inc.
    Inventors: Ronald S. Bullen, Allan T. Lillies