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. 31, 2016
Filed:
Dec. 19, 2014
Applicant:
M-i L.l.c., Houston, TX (US);
Inventors:
Charles Svoboda, Katy, TX (US);
LaTosha Moore, Richmond, TX (US);
Frank E. Evans, The Woodlands, TX (US);
Assignee:
M-I L.L.C., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/20 (2006.01); E21B 43/16 (2006.01); E21B 21/06 (2006.01); C09K 8/08 (2006.01); E21B 7/00 (2006.01); E21B 21/00 (2006.01); E21B 43/04 (2006.01);
U.S. Cl.
CPC ...
C09K 8/206 (2013.01); C09K 8/08 (2013.01); E21B 7/00 (2013.01); E21B 21/003 (2013.01); E21B 21/068 (2013.01); E21B 43/04 (2013.01); E21B 43/16 (2013.01); C09K 2208/18 (2013.01); C09K 2208/30 (2013.01);
Abstract
A wellbore fluid that includes an aqueous based fluid; an amphoteric, viscoelastic surfactant; and a modified starch is disclosed. Methods of drilling subterranean wells, methods of reducing the loss of fluid out of subterranean wells, and methods of completing wellbores using aqueous-based fluids having an ampoteric, viscoelastic surfactant and a modified starch are also disclosed.