Patents by Inventor Yenny Virginia Rojas

Yenny Virginia Rojas 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).

  • Polymer-enhanced foamable drilling fluid
    Patent number: 6800592
    Abstract: A foamable drilling fluid is provided which includes an aqueous solvent; a surfactant; and a polysaccharide preferably derived from a galactomannan gum. The foamed drilling fluid includes a liquid phase consisting of the aqueous solvent, polysaccharide and surfactant, and a gas phase of air, nitrogen, natural gas, CO2 and mixtures thereof. The drilling fluid is stable in the presence of crude oil and salt and environmentally friendly.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: October 5, 2004
    Assignee: Intevep, S.A.
    Inventors: Yenny Virginia Rojas, Alida del Carmen Aponte
  • Polymer-enhanced foamable drilling fluid
    Publication number: 20030078168
    Abstract: A foamable drilling fluid is provided which includes an aqueous solvent; a surfactant; and a polysaccharide preferably derived from a galactomannan gum. The foamed drilling fluid includes a liquid phase consisting of the aqueous solvent, polysaccharide and surfactant, and a gas phase of air, nitrogen, natural gas, CO2 and mixtures thereof. The drilling fluid is stable in the presence of crude oil and salt and environmentally friendly.
    Type: Application
    Filed: August 28, 2001
    Publication date: April 24, 2003
    Inventors: Yenny Virginia Rojas, Alida del Carmen Aponte