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:
Jul. 28, 2020
Filed:
Mar. 04, 2016
Applicant:
Cnpc Usa Corporation, Houston, TX (US);
Inventors:
Chun Zhou, Sugar Land, TX (US);
Jiancheng Li, Panjin, CN;
Burhan Hoxha, Houston, TX (US);
Stephanie Yu, Houston, TX (US);
Assignee:
CNPC USA CORPORATION, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/035 (2006.01); C09K 8/34 (2006.01); E21B 7/00 (2006.01); E21B 21/06 (2006.01);
U.S. Cl.
CPC ...
C09K 8/035 (2013.01); C09K 8/34 (2013.01); E21B 7/00 (2013.01); E21B 21/062 (2013.01); E21B 21/065 (2013.01);
Abstract
A thinner that is a poly fatty amide reacted with maleic acid to form a product, and diluting the product with a compound selected from the group consisting of oleyl alcohol, fatty acid, and poly condensed fatty acid is able to reduce the viscosity of oil-based drilling fluid, thus allowing for reuse of the oil-based drilling fluid.