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:
Nov. 17, 2020
Filed:
Feb. 27, 2019
Yangtze University, Hubei, CN;
Cnooc China Limited, Zhanjiang Branch, Guangdong, Guangdong, CN;
Mingbiao Xu, Hubei, CN;
Zhong Li, Guangdong, CN;
Fuchang You, Hubei, CN;
Yanjun Li, Guangdong, CN;
Hexing Liu, Guangdong, CN;
Shanshan Zhou, Hubei, CN;
Yangtze University, Jingzhou, CN;
CNOOC China Limited, Zhanjiang Branch, Guangdong, Zhanjiang, CN;
Abstract
A water-based drilling fluid for deepwater drilling includes 0.1%-1.0% by weight of a viscosifier, 0.1%-1.0% by weight of an acidity regulator, 0.5%-3.5% by weight of a filtrate loss reducer, 0.5%-1.5% by weight of a low-temperature yield point enhancer, 1.0%-5.0% by weight of a shale inhibitor, 15%-25% by weight of a hydrate inhibitor, 1.0%-3.0% by weight of a lubricant, 5.0%-10.0% by weight of a temporary plugging agent and seawater.