Title:
FLACK PLUG AND METHOD FOR MANUFACTURING SAME, AND METHOD FOR SEALING BOREHOLE
Document Type and Number:
WIPO Patent Application WO/2021/225164
Kind Code:
A1
Abstract:
Provided is a flack plug or the like capable of being inserted into a borehole to seal the borehole with high strength, and then quickly disassembled and removed, thereby efficiently producing petroleum. A flack plug (10) according to the present embodiment has a member made of a magnesium (Mg) alloy. The member has a multi-phase structure including a first phase (31), which is a matrix phase, and a second phase (32) present in the first phase (31). In the multi-phase structure, the second phase (32) is distributed in a substantially striped pattern in the first phase in a first cross section perpendicular to a second direction of the flack plug (10), and distributed in a substantially mesh-like pattern in the first phase in a second cross section perpendicular to a first direction of the flack plug (10).
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Inventors:
YOSHIDA SHINNOSUKE (JP)
TAKAHASHI SHINYA (JP)
TAKAHASHI SHINYA (JP)
Application Number:
PCT/JP2021/017529
Publication Date:
November 11, 2021
Filing Date:
May 07, 2021
Export Citation:
Assignee:
KUREHA CORP (JP)
International Classes:
C22C23/00; C22C23/04; C22C23/06; E21B29/00; E21B33/12
Domestic Patent References:
| WO2017111159A1 | 2017-06-29 |
Foreign References:
| CN107699763A | 2018-02-16 | |||
| JPS52119409A | 1977-10-06 | |||
| JP2014152361A | 2014-08-25 | |||
| CN109295368A | 2019-02-01 | |||
| JP2017525843A | 2017-09-07 | |||
| US20190054523A1 | 2019-02-21 |
Other References:
See also references of EP 4148156A4
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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