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:
Nov. 19, 2015
Applicant:
Cnpc Usa Corporation, Houston, TX (US);
Inventors:
Assignee:
CNPC USA CORPORATION, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/035 (2006.01); C09K 8/32 (2006.01); E21B 21/06 (2006.01);
U.S. Cl.
CPC ...
C09K 8/32 (2013.01); E21B 21/062 (2013.01);
Abstract
A thinner that is a polycondensed fatty acid that is selected from the group consisting of 12-hydroxystearic acid, 12-hydroxyoctadecanoic acid, polyhydroxystearic acid, reaction products with stearic acid, octadecanoate, octadecanoic acid, and homopolymers of stearic acid is able to reduce the viscosity of oil-based drilling fluid, thus allowing for reuse of the oil-based drilling fluid.