Patents by Inventor Estevao De Oliveira Barra

Estevao De Oliveira Barra 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).

  • Process to produce oil or gas from a subterranean formation using a chelating agent
    Patent number: 10995257
    Abstract: A two-step process to produce oil or gas from a subterranean formation wherein in a first step the subterranean formation is treated with an aqueous composition containing a chelating agent selected from the group of glutamic acid N,N-diacetic acid or a salt thereof (GLDA), aspartic acid N,N-diacetic acid or a salt thereof (ASDA), methylglycine N,N-diacetic acid or a salt thereof (MGDA), and N-hydroxyethyl ethylenediamine N,N?,N?-triacetic acid or a salt thereof (HEDTA) and wherein, in a next step, in the outlet streams from the subterranean formation the aqueous phase is separated from the non-aqueous phase.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: May 4, 2021
    Assignee: NOURYON CHEMICALS INTERNATIONAL B.V.
    Inventors: Cornelia Adriana De Wolf, Hisham Nasr-El-Din, Estevao De Oliveira Barra, Edwin Rudolf Antony Bang, Theodor Johannes Stanitzek
  • Process to treat subterranean formations using a chelating agent
    Patent number: 9745509
    Abstract: The present invention relates to a process to treat a subterranean formation by introducing a composition containing between 1 and 40 wt % on total weight of the composition of a chelating agent selected from the group of glutamic acid N,N-diacetic acid or a salt thereof (GLDA), aspartic acid N,N-diacetic acid or a salt thereof (ASDA), and methylglycine N,N-diacetic acid or a salt thereof (MGDA) into the formation, wherein the process comprises a soaking step.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: August 29, 2017
    Assignee: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.
    Inventors: Hisham Nasr-El-Din, Cornelia Adriana De Wolf, Mohammed Ali Ibrahim Sayed, Estevao De Oliveira Barra
  • Process to Treat Subterranean Formations Using a Chelating Agent
    Publication number: 20160115376
    Abstract: The present invention relatestoa process to treat a subterranean formation by introducing a composition containing between 1 and 40 wt % on total weight of the composition of a chelating agent selected from the group of glutamic acid N,N-diacetic acid or a salt thereof (GLDA), aspartic acid N,N-diacetic acid or a salt thereof (ASDA), and methylglycine N,N-diacetic acid or a salt thereof (MGDA) into the formation, wherein the process comprises a soaking step.
    Type: Application
    Filed: June 3, 2014
    Publication date: April 28, 2016
    Inventors: Hisham Nasr-El-Din, Cornelia Adriana De Wolf, Mohammed Ali Ibrahim Sayed, Estevao De Oliveira Barra
  • Process To Produce Oil Or Gas From A Subterranean Formation Using A Chelating Agent
    Publication number: 20150107832
    Abstract: The present invention relates to a two-step process to produce oil or gas from a subterranean formation wherein in a first step the subterranean formation is treated with an aqueous composition containing a chelating agent selected from the group of glutamic acid N,N-di-acetic acid or a salt thereof (GLDA), aspartic acid N,N-diacetic acid or a salt thereof (ASDA), methylglycine N,N-diacetic acid or a salt thereof (MGDA), and N-hydroxyethyl ethylenediamine N,N?,N?-triacetic acid or a salt thereof (HEDTA) and wherein, in a next step, in the outlet streams from the subterranean formation the aqueous phase is separated from the non-aqueous phase.
    Type: Application
    Filed: June 4, 2013
    Publication date: April 23, 2015
    Inventors: Cornelia Adriana DeWolf, Hisham Nasr-El-Din, Estevao De Oliveira Barra, Edwin Rudolf Antony Bang, Theodor Johannes Stanitzek