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:
Sep. 29, 2020
Filed:
Jun. 15, 2018
Cnpc Usa Corporation, Houston, TX (US);
Beijing Huamei Inc. Cnpc, Beijing, CN;
Chun Zhou, Sugar Land, TX (US);
Fuchen Liu, Panjin, CN;
Yonggui Liu, Daqing, CN;
Xingdong Yu, Daqing, CN;
CNPC USA Corporation, Houston, TX (US);
Beijing Huamei, Inc., Beijing, CN;
Abstract
A shale inhibitor to improve the application of water-based drilling fluid in the shale formation rock is provided. An embodiment of the shale inhibitor is the reaction product of an amine, such as triethanolamine, and epichlorohydrin in water solution. Another embodiment of the shale inhibitor is the reaction product of triethanolamine, epichlorohydrin, and hypophosphorous acid. It is highly effective and has a better performance than most commercial products on preventing the disintegration and swelling of the shale formation.