Title:
DOWNHOLE DEVICE DART AND DOWNHOLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/024711
Kind Code:
A1
Abstract:
In a downhole device dart according to the present invention, a ball is formed from a first degradable material having a first degradation speed, a mandrel is formed from a second degradable material having a second degradation speed slower than the first degradation speed, and a sleeve is formed from the second degradable material or a third degradable material having a third degradation speed slower than the second degradation speed.
Inventors:
TAKAHASHI SHINYA (JP)
Application Number:
PCT/JP2021/025879
Publication Date:
February 03, 2022
Filing Date:
July 09, 2021
Export Citation:
Assignee:
KUREHA CORP (JP)
International Classes:
E21B34/10; E21B34/14
Domestic Patent References:
| WO2015133543A1 | 2015-09-11 |
Foreign References:
| US20200095855A1 | 2020-03-26 | |||
| US20160108711A1 | 2016-04-21 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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