Title:
GROUND DRILLING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/054937
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a ground drilling device that can be maintained in a shorter time by reducing the abrasion of the rotary blade, extending the life of each component, and lowering the exchange frequency. A ground drilling device (1) comprises a rotary blade (2) that drills the ground, a lubricating liquid ejection device (3) that ejects lubricating liquid to the rotary blade (2) when the ground is drilled, and an oxygen supply device (5) that supplies oxygen to the lubricating liquid. The oxygen supply device (5) has a bubble generation medium (6) that supplies oxygen to the lubricating liquid by making microbubbles from oxygen under high pressure.
Inventors:
ANZAI SATOSHI (JP)
Application Number:
PCT/JP2021/033504
Publication Date:
March 17, 2022
Filing Date:
September 13, 2021
Export Citation:
Assignee:
ANZAI SATOSHI (JP)
International Classes:
E21B3/02; E21D9/06
Foreign References:
| JP2011246950A | 2011-12-08 | |||
| JP2015044171A | 2015-03-12 | |||
| JP6370954B1 | 2018-08-08 | |||
| JPS59135995U | 1984-09-11 | |||
| JP2017078218A | 2017-04-27 | |||
| JPS573994A | 1982-01-09 | |||
| CN111058854A | 2020-04-24 | |||
| JPS6370954A | 1988-03-31 |
Attorney, Agent or Firm:
YANO INTERNATIONAL PATENT ATTORNEYS OFFICE, P.C. (JP)
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