DRILL DEVICE

WIPO Patent Application WO/2021/002607

A1

Disclosed technology relates to a drill device comprising: a pile configured such that same descends to a seafloor surface through a mooring installation device provided in a ship, and a part of the body thereof is fixed in an area of the seafloor surface as the upper surface thereof is pressurized in the vertical direction; a driving pipe configured such that same descends to the seafloor surface through a through-hole formed in the pile, the body thereof is inserted into a seafloor foundation, and same is recovered through the through-hole after excavation is completed; a chain, one end of which is fixed to one side of the pile, and the other end of which is introduced through the through-hole such that same is inserted into the seafloor foundation together with the driving pipe; and a drill bit unit having a drill bit provided on the front portion of the body thereof and having a fastening portion formed on the rear portion of the body thereof such that an end of the driving pipe is fastened thereto, the drill bit unit being configured to insert the driving pipe and the chain into the seafloor foundation while the other end of the chain is connected to a bearing surrounding the body thereof. Accordingly, the drill device is advantageous in that the chain is prevented from being wound around the driving pipe, and the pile remains fixed by fixing the seafloor foundation with the drill bit.

CHO BEONG HO (KR)

PCT/KR2020/007651

January 07, 2021

June 12, 2020

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YE SUNG OCEAN TECH LTD (KR)

B63B21/26; B63B21/50; E21B41/00

KR20180012612A	2018-02-06
US6598555B1	2003-07-29
KR20160059007A	2016-05-26
JPS61206735U	1986-12-27
JP2011079925A	2011-04-21
KR101859610B1	2018-05-18

See also references of EP 3995389A4

ISIS IP LAW LLC (KR)

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