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:
Jan. 14, 2003
Filed:
Apr. 20, 2000
Michael D. Hoey, Maplewood, NJ (US);
Ralph Franklin, Danbury, CT (US);
Douglas M. Lucas, West Hempstead, NY (US);
Maurice Dery, Putnam Valley, NY (US);
Randy E. Dobson, Spring, TX (US);
Michael Engel, White Plains, NY (US);
James F. Gadberry, Danbury, CT (US);
Ramanair S. Premachandran, Saddle Brook, NJ (US);
Glenda Del Carmen Vale, Corsicana, TX (US);
Akzo Nobel N.V., Arnhem, NL;
Abstract
A method for controlling the rheology of aqueous systems, particularly for those intended for underground use, includes injecting an aqueous viscoelastic fluid containing a surfactant gelling agent into the system. The viscoelastic surfactant composition of the invention comprises, as a gelling agent, at least one fatty aliphatic amidoamine oxide in a glycol solvent. The composition also maintains the levels of free fatty acid and free amine within critical parameters in order to achieve superior performance. The additives may be incorporated in the viscoelastic fluid to tailor its use in stimulation fluids, drilling muds, fracture fluids, and in applications such as permeability modification, gravel packing, cementing, and the like.