公开(公告)号：US20230112110A1

公开(公告)日：2023-04-13

申请号：US17904804

申请日：2021-02-26

申请人： Japan Agency for Marine-Earth Science and Technology

发明人： Eigou MIYAZAKI ,  Yoshihisa KAWAMURA ,  Ikuo SAWADA ,  Masanori KYO ,  Mikito FURUICHI ,  Keita AKIYAMA ,  Yasuhiro NAMBA

IPC分类号： E21B43/01 ,  E21B43/29

摘要： A method for recovering rare-earth mud including steps of: (A) penetrating a mud gathering pipe into a layer containing rare-earth mud under the seafloor, (B) preparing a slurry containing a rare earth by loosening rare-earth mud in the mud gathering pipe, and (C) transferring the slurry through a mud raising pipe. A rare-earth mud recovery system including: a mud gathering pipe configured to penetrate into a layer containing rare-earth mud under a seafloor; a stirring device configured to loosen rare-earth mud in the mud gathering pipe; and a mud raising pipe connected to the mud gathering pipe.

公开(公告)号：US20180209245A1

公开(公告)日：2018-07-26

申请号：US15746221

申请日：2016-07-21

申请人： JAPAN AGENCY FOR MARINE-EARTH SCIENCE AND TECHNOLOGY ,  NLC CO., LTD.

发明人： Yuichi SHIMMOTO ,  Eigou MIYAZAKI ,  Keita AKIYAMA ,  Masaki KAWAHARA ,  Tomoaki SUZUKI

IPC分类号： E21B34/10

摘要： A concave section such as an extension section, a cutting section, and a notch section is provided to receive a lid of a float valve in an inside of outer tube assembly of a drill string. Thus, when the float valve is provided for the drill string, it is made possible to collect a core with a larger diameter by a thinner drill string, by expanding the inner diameter of the drill string.