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:
May. 28, 2019
Filed:
Dec. 14, 2011
Cornelia Adriana DE Wolf, Eerbeek, NL;
Mohamed Ahmed Nasr-el-din Mahmoud, Dhahran, SA;
Hisham Nasr-el-din, College Station, TX (US);
Cornelia Adriana de Wolf, Eerbeek, NL;
Mohamed Ahmed Nasr-El-Din Mahmoud, Dhahran, SA;
Hisham Nasr-El-Din, College Station, TX (US);
AKZO NOBEL CHEMICALS INTERNATIONAL B.V., Arnhem, NL;
Abstract
The present invention relates to a process for treating a sandstone formation comprising introducing a fluid containing glutamic acid N,N-diacetic acid or a salt thereof (GLDA) and/or methylglycine N,N-diacetic acid or a salt thereof (MGDA) and having a pH of between 1 and 14 into the formation. The invention in addition relates to a fluid suitable for use in the above process containing 5-30 wt % of glutamic acid N,N-diacetic acid or a salt thereof (GLDA) and/or methylglycine N,N-diacetic acid or a salt thereof (MGDA), a corrosion inhibitor, a surfactant, and a mutual solvent.