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:
Jul. 12, 2022
Filed:
Feb. 24, 2021
Applicant:
Kuraray Co., Ltd., Kurashiki, JP;
Inventors:
Ghebrehiwet Ghebremeskel, Houston, TX (US);
Keisuke Morikawa, Houston, TX (US);
Takuma Kaneshima, Houston, TX (US);
Assignee:
KURARAY CO., LTD., Kurashiki, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/508 (2006.01); C08F 216/06 (2006.01); C08F 210/02 (2006.01); E21B 33/13 (2006.01); C09K 8/504 (2006.01);
U.S. Cl.
CPC ...
C09K 8/5083 (2013.01); C08F 210/02 (2013.01); C08F 216/06 (2013.01); C09K 8/5045 (2013.01); E21B 33/13 (2013.01); C08F 2810/50 (2013.01); E21B 2200/08 (2020.05);
Abstract
A particulate compacted copolymer polyvinyl alcohol-based composition that can be used as a plugging agent for minimizing or eliminating loss of circulation of fluids during the process of well drilling, workover, completion and cementing in the production of oil and gas.