Title:
DOWNHOLE TOOL AND WELL-DRILLING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/013216
Kind Code:
A1
Abstract:
Provided are: a downhole tool with which it is possible to maintain a high breakdown rate even in high-temperature environments; and a well-drilling method using said downhole tool. This downhole tool is characterized by comprising a member containing a reactive metal, and a member containing a degradable resin composition that promotes the breakdown of the reactive metal, wherein the degradable resin composition contains a degradable resin that generates an acid when broken down, and the maximum molar ratio of acid that can be generated by the degradable resin composition with respect to the amount of reactive metal is at least 1.0.
Inventors:
KOBAYASHI FUMINORI (JP)
Application Number:
PCT/JP2019/027257
Publication Date:
January 16, 2020
Filing Date:
July 10, 2019
Export Citation:
Assignee:
KUREHA CORP (JP)
International Classes:
E21B33/12; E21B43/26
Domestic Patent References:
| WO2015098801A1 | 2015-07-02 | |||
| WO2013183363A1 | 2013-12-12 |
Foreign References:
| JP2016061127A | 2016-04-25 | |||
| JP2016060900A | 2016-04-25 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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