Patents by Inventor Emilio Guevara

Emilio Guevara 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).

  • Conduit having hydrophilic and oleophobic inner surfaces for oil transportation
    Patent number: 5385175
    Abstract: A conduit for transporting an oil and water mixture wherein the conduit has an inner surface is substantially hydrophilic and oleophobic. The surface is characterized by a water absorption capacity of greater than or equal to about 8% by weight, and by a contact angle with the oil of greater than or equal to about 120.degree.. The inner surface material may be a silica containing concrete composition or a polymeric coating composition. A conduit having such an inner surface is wetted by water so as to inhibit adhesion of oil to the conduit.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: January 31, 1995
    Assignee: Intevep, S.A.
    Inventors: Mayela Rivero, Valmore Rodriquez, Dan Joseph, Emilio Guevara, Nelson Carabano
  • Process for the production and burning of a natural-emulsified liquid fuel
    Patent number: 4801304
    Abstract: A process for the preparation of a natural liquid fuel and, more particularly, a process that allows a high sulfur natural fuel to be converted into energy by combustion with a substantial reduction in sulfur oxide emissions.
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: January 31, 1989
    Assignee: Intevep, S.A.
    Inventors: Domingo R. Polanco, Ignacio Layrisse, Hercilio Rivas, G. Euler Jimenez, Lirio Q. de Paz, Jose P. Salazar, Mayela Rivero, Emilio Guevara, Maria L. Chirinos
  • Core-annular flow process
    Patent number: 4753261
    Abstract: A process for transporting viscous oil in a pipeline is described which comprises placing a spherical sealed pig within the pipeline at a desired position; filling a fraction of the pipeline upstream of the pig with a low viscosity fluid such as water; and initiating core flow of a viscous oil such as a heavy or extra heavy crude oil after the first fraction has been filled. The process permits the core-flowed viscous oil to be transported in the same pipeline with a non-core-flowed fluid. To do this, a second pig is placed in the pipeline intermediate the core-flowed viscous oil and the non-core-flowed fluid and a second fraction of the pipeline intermediate the second pig and the core-flowed viscous oil batch is filled with a low viscosity fluid such as water.
    Type: Grant
    Filed: November 2, 1987
    Date of Patent: June 28, 1988
    Assignee: Intevep, S.A.
    Inventors: Konstantin Zagustin, Emilio Guevara, Gustavo Nunez
  • Process for restarting core flow with very viscous oils after a long standstill period
    Patent number: 4745937
    Abstract: The present invention relates to a process for restarting core flow with viscous oil after a long standstill period. The process comprises initiating a flow of low viscosity fluid such as water into an inlet portion of a pipeline; gradually increasing the flow of the low viscosity fluid until a desired steady state condition is reached and initiating a flow of viscous oil into the inlet portion of the pipeline after the steady state condition has been reached.
    Type: Grant
    Filed: November 2, 1987
    Date of Patent: May 24, 1988
    Assignee: Intevep, S.A.
    Inventors: Konstantin Zagustin, Emilio Guevara, Gustavo Nunez