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:
Jun. 04, 2019
Filed:
Mar. 12, 2014
Applicant:
Akzo Nobel Chemicals International B.v., Amersfoort, NL;
Inventors:
Lingling Li, Ridgefield, CT (US);
James Frederic Gadberry, Danbury, CT (US);
Assignee:
AKZO NOBEL CHEMICALS INTERNATIONAL B.V., Arnhem, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/60 (2006.01); C09K 8/62 (2006.01); C09K 8/035 (2006.01); E21B 43/26 (2006.01); C09K 8/68 (2006.01); C09K 8/74 (2006.01);
U.S. Cl.
CPC ...
C09K 8/602 (2013.01); C09K 8/035 (2013.01); C09K 8/62 (2013.01); C09K 8/68 (2013.01); C09K 8/74 (2013.01); E21B 43/26 (2013.01); C09K 2208/30 (2013.01);
Abstract
The invention relates to the viscoelastic surfactant based fluids and methods for utilizing same in oilfield applications including, but not limited to gravel packing, cleanup, drilling, acidizing, fracturing and the like in a subterranean formation. The viscoelastic fluid of the invention comprises at least one amphoteric surfactant and at least one synergistic cosurfactant that increases the gel strength and extends the brine tolerance of said viscoelastic-based fluid.