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:
Aug. 06, 2024
Filed:
Jun. 22, 2021
Applicant:
Mitsubishi Chemical Corporation, Tokyo, JP;
Inventors:
Yasuhiro Hirano, Tokyo, JP;
Takahiro Saka, Tokyo, JP;
Ryosuke Taniguchi, Tokyo, JP;
Chizuko Furo, Tokyo, JP;
Assignee:
MITSUBISHI CHEMICAL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 216/06 (2006.01); C08F 220/02 (2006.01); C09K 8/508 (2006.01);
U.S. Cl.
CPC ...
C09K 8/5083 (2013.01); C08F 216/06 (2013.01); C08F 220/02 (2013.01);
Abstract
A diverting agent is provided that exhibits sufficient filling properties against a fracture in a well because of swelling without complete dissolution for a certain period of time (about 30 minutes to 5 hours), and that quickly dissolves and can be removed even at a low temperature of 40° C. to 60° C. after a certain period of time has passed. Also provided is a diverting agent that contains a modified polyvinyl alcohol-based resin.