Patents by Inventor Alan L. Stacy

Alan L. Stacy 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 reducing deleterious environmental impact of subterranean fracturing processes
    Patent number: 5424285
    Abstract: A composite fracturing fluid consisting of a mixture of carbon dioxide liquid, nitrogen gas and an aqueous media. Nitrogen is present in the mixture in an amount from about 1.25 to about 15 parts by volume to about 1 part by volume carbon dioxide, and nitrogen and carbon dioxide are present in the mixture from about 1 to about 24 parts by volume to about 1 part by volume water at bottom hole conditions in a subterranean formation. Thickening agents, gelling agents, foaming agents, surfactants, cross-linking agents, proppants, and other additives may be mixed with the fluid to achieve fluid properties desired for various types of subterranean formations.
    Type: Grant
    Filed: January 27, 1993
    Date of Patent: June 13, 1995
    Assignee: The Western Company of North America
    Inventors: Alan L. Stacy, Richard B. Weber