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:
Jan. 12, 2021
Filed:
May. 29, 2020
China University of Petroleum (Beijing), Beijing, CN;
Beijing Shida Bocheng Technology Co., Ltd, Beijing, CN;
Guancheng Jiang, Beijing, CN;
Yinbo He, Beijing, CN;
Lili Yang, Beijing, CN;
Kai Wang, Beijing, CN;
Tengfei Dong, Beijing, CN;
Xiaohu Quan, Beijing, CN;
Kaixiao Cui, Beijing, CN;
He Shi, Beijing, CN;
CHINA UNIVERSITY OF PETROLEUM (BEIJING), Beijing, CN;
BEIJING SHIDA BOCHENG TECHNOLOGY CO., LTD, Beijing, CN;
Abstract
The present disclosure relates to the technical field of water-based drilling fluid, in particular to a modified polyhistidine suitable for being used as a supramolecular shale inhibitor, a method of preparing the same, and its application in water-based drilling fluids. The modified polyhistidine has a histidine polymerization main chain comprising a structural unit, which is represented by Formula (1) and attached with a modifying group, and the histidine polymerization main chain has a histidine polymerization degree of 6-9. The modified polyhistidine provided by the present disclosure is a degradable biological material and has the advantage of environmental friendliness; when the modified polyhistidine is used as a shale inhibitor, it can take advantage of its supermolecular property to effectively inhibit the hydration expansion of montmorillonite which is the most important expansion mineral in shale, and exhibits excellent inhibition effect and desirable temperature resistance.