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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.:

US 11891563 B1

PDFFull Text
Date of Patent:
Feb. 06, 2024

Filed:

Sep. 08, 2021

Ph-sensitive temporary plugging agent, preparation method thereof, and use thereof in exploitation of low-permeability oil reservoir

Applicant:

Yangtze University, Jingzhou, CN;

Inventors:

Huan Yang, Jingzhou, CN;

Zhuyang Jiang, Jingzhou, CN;

Xiaorong Yu, Jingzhou, CN;

Gaoshen Su, Jingzhou, CN;

Kailu Wang, Jingzhou, CN;

Beibei Zhang, Jingzhou, CN;

Yang Li, Jingzhou, CN;

Chang Xiao, Jingzhou, CN;

Assignee:

YANGTZE UNIVERSITY, Jingzhou, CN;

Attorney:

Tutunjian & Bitetto, P.C.

Primary Examiner:

Kumar R Bhushan

Int. Cl.
CPC ...
C09K 8/035 (2006.01); C09K 8/42 (2006.01); C09K 8/44 (2006.01); C09K 8/514 (2006.01);
U.S. Cl.
CPC ...
C09K 8/426 (2013.01); C09K 8/035 (2013.01); C09K 8/44 (2013.01); C09K 8/514 (2013.01);
Abstract

A pH-sensitive temporary plugging agent and its preparation method, and the use thereof in exploitation of a low-permeability oil reservoir are disclosed. The temporary plugging agent is prepared by raw materials including, in percentages by mass, 3-8% of carboxymethyl chitosan, 0.2-0.7% of gelatin, 0.1-0.6% of an initiator, 5-15% of a toughener, and a balance of water, wherein the initiator is a solution of AgNOin ammonia water having a concentration of 0.1-0.3 mol/L, and the toughener is a carboxyl-terminated hyperbranched polyester.

Find Patent Forward Citations

Yang, Huan. (2024). Ph-sensitive temporary plugging agent, preparation method thereof, and use thereof in exploitation of low-permeability oil reservoir (U.S. Patent No. 11891563). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11891563

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