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:
Sep. 01, 2026
Filed:
Sep. 14, 2022
Applicant:
Kureha Corporation, Tokyo, JP;
Inventors:
Takuma Kobayashi, Tokyo, JP;
Takahiro Suga, Tokyo, JP;
Assignee:
KUREHA CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 33/12 (2006.01); C08K 5/3442 (2006.01); C08L 67/04 (2006.01);
U.S. Cl.
CPC ...
C08L 67/04 (2013.01); C08K 5/3442 (2013.01); E21B 33/1208 (2013.01); C08L 2201/08 (2013.01); C08L 2205/025 (2013.01); E21B 2200/08 (2020.05);
Abstract
This technique is capable of suppressing reduction in thickness of a downhole tool or a component thereof in a well at a high temperature. The downhole tool or a component has a resin composition including: 50 parts by mass or more and 97 parts by mass or less of polyglycolic acid; 3 parts by mass or more and 50 parts by mass or less of polybutylene terephthalate; and 2 parts by mass or more and 15 parts by mass or less of a cyclic carbodiimide compound with respect to 100 parts by mass of a total amount of the polyglycolic acid and the polybutylene terephthalate.