Patents by Inventor Arthur Steven Metcalf

Arthur Steven Metcalf 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 of preventing gas breakthrough in an oil bearing formation
    Patent number: 6419017
    Abstract: A method of preventing gas breakthrough in an oil well, which includes first pumping a slug of an alkaline earth salt into the well bore, followed by a slug of spacer solution, and finally a slug of a fatty acid resin. The resin can comprise at least one fatty acid, a fat (or tall oil), and other components. The resin and alkaline earth salt advantageously react in situ to form a water and gas insoluble precipitate or gum that forms a sealing zone around the oil/gas interface of the well bore, and also allows the oil to dissolve the precipitate to facilitate recovery of the oil.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: July 16, 2002
    Assignee: BJ Services Company
    Inventors: Arthur Steven Metcalf, Jeffrey C. Dawson
  • Acid gels for fracturing subterranean formations
    Patent number: 6046140
    Abstract: A crosslinked acid gel comprising an emulsion polymer and an external activator is provided. Methods for acid fracturing subterranean formations using the crosslinked acid gel are also provided.
    Type: Grant
    Filed: September 29, 1999
    Date of Patent: April 4, 2000
    Assignee: BJ Services Company
    Inventors: George Tso-chih Woo, Joel Lynn Boles, Enrique Lopez, Arthur Steven Metcalf, Jeffrey Carl Dawson
  • Acid gels for fracturing subterranean formations
    Patent number: 5975206
    Abstract: A crosslinked acid gel comprising an emulsion polymer and an external activator is provided. Methods for acid fracturing subterranean formations using the crosslinked acid gel are also provided.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: November 2, 1999
    Assignee: BJ Services Company
    Inventors: George Tso-chih Woo, Joel Lynn Boles, Enrique Lopez, Arthur Steven Metcalf, Jeffrey Carl Dawson