Title:
DRILL BIT
Document Type and Number:
WIPO Patent Application WO/2022/098175
Kind Code:
A1
Abstract:
A drill bit according to the present invention has: a first bit body having a hollow portion; a cutting tip mounting part on which cutting tips are mounted in the circumferential direction on the end of the first bit body, and which has a core insertion hole; first movement preventing parts provided on the outer peripheral surface of the first bit body to prevent the first bit body from moving from the central axis of a hole being drilled, and cool the first bit body during a drilling work by means of rotation; a second bit body coaxially screw-coupled to the first bit body; and a core withdrawing member provided in the hollow portion of the first bit body to withdraw a core formed by drilling by the bit.
Inventors:
IN SUK SHIN (KR)
Application Number:
PCT/KR2021/016076
Publication Date:
May 12, 2022
Filing Date:
November 05, 2021
Export Citation:
Assignee:
IN SUK SHIN (KR)
International Classes:
E21B10/42; E21B10/04; E21B10/60
Foreign References:
| KR20000015639U | 2000-08-05 | |||
| JP2597038B2 | 1997-04-02 | |||
| JPH10146771A | 1998-06-02 | |||
| KR20090092375A | 2009-09-01 | |||
| JP2018076734A | 2018-05-17 |
Attorney, Agent or Firm:
LEE, Jea Ryang (KR)
Download PDF:
Previous Patent: APPARATUS AND METHOD FOR CONTROL OF E2 NODE IN WIRELESS COMMUNICATION SYSTEM
Next Patent: DISPOSABLE GOWN
Next Patent: DISPOSABLE GOWN