The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 2017
Filed:
Dec. 14, 2011
Cornelia Adriana DE Wolf, Eerbeek, NL;
James N. Lepage, Chicago, IL (US);
Hisham Nasr-el-din, College Station, TX (US);
Mohamed Ahmed Nasr-el-din Mahmoud, Dhahran, SA;
Edwin Rudolf Antony Bang, Arnhem, NL;
Noble Thekkemelathethil George, College Station, TX (US);
Cornelia Adriana De Wolf, Eerbeek, NL;
James N. Lepage, Chicago, IL (US);
Hisham Nasr-El-Din, College Station, TX (US);
Mohamed Ahmed Nasr-El-Din Mahmoud, Dhahran, SA;
Edwin Rudolf Antony Bang, Arnhem, NL;
Noble Thekkemelathethil George, College Station, TX (US);
AKZO NOBEL CHEMICALS INTERNATIONAL B.V., Amersfoort, NL;
Abstract
The present invention relates to a process for treating a subterranean formation wherein a fluid containing an ammonium salt of glutamic acid N,N-diacetic acid (GLDA) or methylglycine N,N-diacetic acid (MGDA) is introduced into the formation. The invention also covers a fluid containing an ammonium salt of GLDA and/or MGDA and at least one component from the group of seawater, mutual solvents, anti-sludge agents, (water-wetting or emulsifying) surfactants, foaming agents, corrosion inhibitors corrosion inhibitor intensifiers, viscosifiers, wetting agents, diverting agents, oxygen scavengers, carrier fluids, fluid loss additives, friction reducers, stabilizers, rheology modifiers, gelling agents, scale inhibitors, breakers, salts, brines, pH control additives, bactericides/biocides, particulates, crosslinkers, salt substitutes (such as tetramethyl ammonium chloride), relative permeability modifiers, sulfide scavengers, fibres, nanoparticles, and consolidating agents, and covers an ammonium salt of the formula M(NH)H-GLDA or the formula M(NH)H-MGDA, wherein M is an alkalimetal cation, x is at least 0.1, y is at least 0.1 and x+y+z=4 for GLDA and x+y+z=3 for MGDA.