Patents by Inventor Carlos D. Barrera

Carlos D. Barrera 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).

  • Balanced-activity improved inverse emulsion to inhibit brittle lutite hydration in oil fields
    Patent number: 4474666
    Abstract: An improved inverse emulsion for use as a drilling fluid that inhibits brittle lutite hydration. The emulsion includes a heavy oil; brine; a viscosity agent with thermostabilizing properties; an emulsifying agent; a thickening agent; a gelatinizing additive; and an alkaline earth metal hydroxide. The emulsion avoids hole collapsing and improves well gage stability.
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: October 2, 1984
    Assignee: Instituto Mexicano del Petroleo
    Inventors: Eduardo P. Olmedo, Rosa de J. Hernandez Alvarez, Carlos D. Barrera, Jose de Jesus Garcia Ramos