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. 27, 2008
Filed:
Apr. 13, 2006
Yiyan Chen, Richmond, TX (US);
Jesse C. Lee, Paris, FR;
Fang LI, Pleasanton, CA (US);
Manilal Dahanayake, Princeton Junction, NJ (US);
Robert Tillotson, Toms River, NJ (US);
Allwyn Colaco, South River, NJ (US);
Yiyan Chen, Richmond, TX (US);
Jesse C. Lee, Paris, FR;
Fang Li, Pleasanton, CA (US);
Manilal Dahanayake, Princeton Junction, NJ (US);
Robert Tillotson, Toms River, NJ (US);
Allwyn Colaco, South River, NJ (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A method for increasing the rate of shear rehealing of fluids made with cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of a rheology enhancer package containing, for example a polyethylene glycol-polypropylene glycol block copolymer and a polynaphthalene sulfonate. The rheology enhancer package allows viscoelastic surfactant fluids to be used at lower viscoelastic surfactant concentrations in certain applications, for example certain oilfield treatments, for example fracturing and gravel packing. Preferred surfactants are betaines and quaternary amines.