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:
Jul. 16, 2019
Filed:
Nov. 01, 2017
Saudi Arabian Oil Company, Dhahran, SA;
B. Raghava Reddy, Pearland, TX (US);
Matthew Gary Hilfiger, Richmond, TX (US);
Saudi Arabian Oil Company, Dhahran, SA;
Abstract
Treating a subterranean formation with a composition including a maleic anhydride copolymer, an amine crosslinker, and a gelling agent. The maleic anhydride copolymer includes first repeat units I and II and at least one of second repeat units III and IV: where each Ris independently —H, —O(C-C) alkyl, or —(C-C) alkyl; each Ris independently —H, —O(C-C) alkyl, or —(C-C) alkyl; each Ris independently —OH or —OM, each Mis independently an alkali metal, an alkaline earth metal, an ammonium ion, or a quaternary ammonium ion; and each Ris independently —NHor —OM. The gelling agent includes at least one of: a calcium chelating agent, a calcium precipitating agent, a pH buffer, an agent reactive with hydroxide, and an acid generating agent, and promotes formation of a gel from the maleic anhydride copolymer and the amine crosslinker in contact with set cement.