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. 30, 2022
Filed:
Jul. 10, 2019
Applicant:
Kureha Corporation, Tokyo, JP;
Inventor:
Fuminori Kobayashi, Tokyo, JP;
Assignee:
KUREHA CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 33/12 (2006.01);
U.S. Cl.
CPC ...
E21B 33/12 (2013.01); E21B 2200/08 (2020.05);
Abstract
To provide a downhole tool that can maintain a high degradation rate even in high-temperature environments and a method for well drilling using the downhole tool. A downhole tool including: a component containing a reactive metal; and a component containing a degradable resin composition promoting degradation of the reactive metal, the degradable resin composition containing a degradable resin producing an acid by degradation, wherein a molar ratio of a maximum amount of the acid which the degradable resin composition is capable of producing to a content of the reactive metal is 1.0 or higher.