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. 12, 2011
Filed:
Dec. 17, 2004
Applicants:
Qi Qu, Spring, TX (US);
Xiaolan Wang, Baton Rouge, LA (US);
Inventors:
Qi Qu, Spring, TX (US);
Xiaolan Wang, Baton Rouge, LA (US);
Assignee:
Baker Hughes Incorporated, Houston, TX (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K 8/60 (2006.01);
U.S. Cl.
CPC ...
Abstract
Unwanted heat loss from production tubing or uncontrolled heat transfer to outer annuli is inhibited by introduction into the annuli a thermal insulating packer fluid or a riser fluid containing a zwitterionic surfactant, an alcohol and a brine. The viscosity of the composition is sufficient to reduce the convection flow velocity within the annulus. The invention has particular applicability with high density brines.