Patents by Inventor Guilherme DE PAIVA CÔRTES

Guilherme DE PAIVA CÔRTES 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).

  • USE OF A THERMOPHOSPHATE FERTILIZER THAT HAS LOW SOLUBILITY IN WATER AND METHOD FOR REDUCING EUTROPHICATION OF WATER BODIES DUE TO FERTILIZERS
    Publication number: 20190367424
    Abstract: The present invention relates to the use of a poorly water-soluble thermophosphate fertilizer to reduce water eutrophication caused by fertilizers, particularly due to fertilizer production or soil fertilization. The invention further relates to a method of reducing water eutrophication caused by fertilizers.
    Type: Application
    Filed: February 17, 2017
    Publication date: December 5, 2019
    Inventors: Sebastiao CURIMBABA, Ramiro CHAVASCO FERREIRA, Rafael José HORNE CURIMBABA FERREIRA, Gabriel WARWICK KERR DE PAIVA CÔRTES, Guilherme DE PAIVA CÔRTES
  • Angular abrasive proppant, process for the preparation thereof and process for hydraulic fracturing of oil and gas wells
    Patent number: 9234127
    Abstract: An angular abrasive proppant comprises angular sintered particles of a material selected from bauxite, clay-minerals, and mixtures thereof, with particle sizes varying from 30 mesh to 150 mesh. A process for the production of an angular abrasive proppant comprising sintered particles of a material selected from bauxite, clay-minerals, and mixtures thereof comprises the steps of drying, grinding, pelletizing, and sintering a bauxite starting material, grinding the sintered pellets, and sizing said particles to a particle size varying from 35 to 150 mesh. A hydraulic fracturing process uses as proppant the angular abrasive proppant as the described above.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: January 12, 2016
    Assignee: Mineracao Curimbaba Ltda.
    Inventors: Gabriel Warwick Kerr de Paiva Cortes, Guilherme de Paiva Cortes
  • Proppant for hydraulic fracturing of oil and gas wells
    Patent number: 7954548
    Abstract: The present invention relates to a proppant for the hydraulic fracturing of oil or gas wells, which consists of a mixture of from 10 to 95% by weight of a spherical proppant and from 5 to 90% by weight of an angular material, the percentages being based on the total weight of the mixture. The proppant obtained according to the present invention is useful for eliminating or decreasing the “flow-back” phenomenon in operations in oil or gas wells.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: June 7, 2011
    Assignee: Mineracao Curimbaba Ltda.
    Inventors: Sebastião Curimbaba, Gabriel Warwick Kerr De Paiva Cortes, Guilherme De Paiva Cortes
  • ANGULAR ABRASIVE PROPPANT, PROCESS FOR THE PREPARATION THEREOF AND PROCESS FOR HYDRAULIC FRACTURING OF OIL AND GAS WELLS
    Publication number: 20090227480
    Abstract: An angular abrasive proppant comprises angular sintered particles of a material selected from bauxite, clay-minerals, and mixtures thereof, with particle sizes varying from 30 mesh to 150 mesh. A process for the production of an angular abrasive proppant comprising sintered particles of a material selected from bauxite, clay-minerals, and mixtures thereof comprises the steps of drying, grinding, pelletizing, and sintering a bauxite starting material, grinding the sintered pellets, and sizing said particles to a particle size varying from 35 to 150 mesh. A hydraulic fracturing process uses as proppant the angular abrasive proppant as the described above.
    Type: Application
    Filed: March 12, 2008
    Publication date: September 10, 2009
    Inventors: Gabriel Warwick Kerr de Paiva Cortes, Guilherme de Paiva Cortes
  • Spherical Ceramic Proppant for Hydraulic Fracturing of Oil or Gas Wells, and a Process for Forming Cavities in the Surface of Spherical Ceramic Proppants
    Publication number: 20090044941
    Abstract: The present invention relates to improved spherical ceramic proppants for fracturing oil and/or gas wells, said proppants exhibiting spherical cavities on their surfaces. The novel proppants of the invention cause an increase in the turbulence of the oil and/or gas flow that passes through the facture where they are applied, with the consequent increase in the extraction productivity of oil or gas from these wells. The invention further relates to a process for forming cavities on the surface of spherical proppants.
    Type: Application
    Filed: June 23, 2006
    Publication date: February 19, 2009
    Inventors: Gabriel Warwick Kerr De Paiva Cortes, Guilherme De Paiva Cortes
  • Proppant for hydraulic fracturing of oil and gas wells and process for decreasing or eliminating "flow-back" effect in oil and gas wells
    Publication number: 20070084602
    Abstract: The present invention relates to a proppant for the hydraulic fracturing of oil or gas wells, which consists of a mixture of from 10 to 95% by weight of a spherical proppant and from 5 to 90% by weight of an angular material, the percentages being based on the total weight of the mixture. The proppant obtained according to the present invention is useful for eliminating or decreasing the “flow-back” phenomenon in operations in oil or gas wells.
    Type: Application
    Filed: June 9, 2003
    Publication date: April 19, 2007
    Inventors: Sebastiao Curimbaba, Gabriel Warwick De Paiva Cortes, Guilherme De Paiva Cortes