Patents by Inventor Marcelo Fontes De Oliveira

Marcelo Fontes De Oliveira 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).

  • Compositions of oil-based biodegradable drilling fluids and process for drilling oil and gas wells
    Patent number: 7285515
    Abstract: Compositions of oil-based biodegradable drilling fluids are described, the compositions comprising an oil phase composed by methyl esters of soybean oil fatty acids, an aqueous phase finely dispersed in the oil phase by specific emulsifiers and several other additives having specific functions for providing suitable performance to the finished drilling fluid composition. The process to manufacture the inverted emulsion and the drilling process that employs the compositions of the invention are described too.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: October 23, 2007
    Assignee: Petroleo Brasileiro S.A. - Petrobras
    Inventors: José Thomaz Goncalves, Marcelo Fontes De Oliveira, Átila Fernando Lima Aragäo
  • Compositions of oil-based biodegradable drilling fluids and process for drilling oil and gas wells
    Publication number: 20040002427
    Abstract: Compositions of oil-based biodegradable drilling fluids are described, the compositions comprising an oil phase composed by methyl esters of soybean oil fatty acids, an aqueous phase finely dispersed in the oil phase by specific emulsifiers and several other additives having specific functions for providing suitable performance to the finished drilling fluid composition. The process to manufacture the inverted emulsion and the drilling process that employs the compositions of the invention are described too.
    Type: Application
    Filed: January 14, 2003
    Publication date: January 1, 2004
    Inventors: Jose Thomaz Goncalves, Marcelo Fontes De Oliveira, Atila Fernando Lima Aragao