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Title:
DOWNHOLE TOOL
Document Type and Number:
WIPO Patent Application WO/2020/012839
Kind Code:
A1
Abstract:
Provided is a downhole tool which has a high initial compressive strength, which can maintain compressive strength for a given period of time, and which can be broken down rapidly after use. This downhole tool is formed from a biodegradable resin containing a polyamide resin and a carboxylic anhydride. The carboxylic anhydride is a compound that satisfies the following melting point conditions. Melting point of polyamide resin ≤ temperature at which a 5% reduction in weight of carboxylic anhydride occurs.

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Inventors:
KOBAYASHI FUMINORI (JP)
SAIJO HIKARU (JP)
Application Number:
PCT/JP2019/022564
Publication Date:
January 16, 2020
Filing Date:
June 06, 2019
Export Citation:
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Assignee:
KUREHA CORP (JP)
International Classes:
E21B33/12; C08J5/00; C08K5/1539; C08L77/00; E21B23/00; E21B33/13; E21B43/16
Domestic Patent References:
WO2018094257A12018-05-24
WO2018009487A12018-01-11
Foreign References:
JP2015172106A2015-10-01
JP2016190901A2016-11-10
JP2017200985A2017-11-09
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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