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:
Apr. 08, 2014
Filed:
Dec. 23, 2008
Applicants:
Yiyan Chen, Sugar Land, TX (US);
Jesse Lee, Paris, FR;
Bruno Drochon, Cambridge, GB;
Inventors:
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/16 (2006.01); E21B 33/00 (2006.01); E21B 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A spacer for use in an oil well cementing operation comprises an aqueous solution of a visco-elastic surfactant. A method of treating a well in a cementing operation comprises pumping the spacer into a well ahead of a cement slurry, thereby minimizing or preventing commingling of drilling fluid and the cement slurry.