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：US20240141769A1

公开(公告)日：2024-05-02

申请号：US18280032

申请日：2022-02-08

申请人： TOA CORPORATION ,  JAPAN AGENCY FOR MARINE-EARTH SCIENCE AND TECHNOLOGY

发明人： Tomohiro MORISAWA ,  Shinya OMORI ,  Ryutaro MURAKAMI ,  Hiroshi IIDA ,  Eigo MIYAZAKI ,  Keita AKIYAMA ,  Masanori KYO ,  Ikuo SAWADA ,  Yoshihisa KAWAMURA

IPC分类号： E21B43/28 ,  E21B17/01 ,  E21B21/00 ,  E21C50/00

CPC分类号： E21B43/28 ,  E21B17/01 ,  E21B21/001 ,  E21C50/00

摘要： A mining riser pipe is extended from above water toward a water bottom containing water bottom resources, and a lower portion of an insertion pipe connected to a lower portion of the mining riser pipe is inserted into the water bottom. A liquid is supplied into the insertion pipe and a rotation shaft extends axially inside both of pipes is rotated to rotate stirring blades attached to a lower portion of the rotation shaft inside the insertion pipe, thereby drilling and dissolving mud S inside the insertion pipe into a slurry form is raised to an upper portion of the insertion pipe by a stirring flow generated by the rotation of the stirring blades, and the raised mud is lifted above the water through the mining riser pipe by lifting force.

公开(公告)号：US20240003253A1

公开(公告)日：2024-01-04

申请号：US18280106

申请日：2022-02-08

申请人： TOA CORPORATION ,  JAPAN AGENCY FOR MARINE-EARTH SCIENCE AND TECHNOLOGY

发明人： Tomohiro MORISAWA ,  Shinya OMORI ,  Yosuke TANAKA ,  Eigo MIYAZAKI ,  Keita AKIYAMA ,  Masanori KYO ,  Ikuo SAWADA ,  Yoshihisa KAWAMURA

IPC分类号： E21C50/00

CPC分类号： E21C50/00

摘要： A mining riser pipe is extended toward a water bottom, and a lower portion of an insertion pipe connected to a lower portion of the mining riser pipe is inserted into the water bottom. A liquid is supplied into the insertion pipe, and a rotation shaft extends inside both pipes and stirring blades attached to a lower portion of the rotation shaft are rotated inside the insertion pipe, thereby drilling and dissolving mud inside the insertion pipe into a slurry. Then, the mud S is raised to an upper portion of the insertion pipe by a stirring flow generated by the stirring blades, and the raised mud slurry is lifted above the water through the mining riser pipe 2, and a rotation speed of the stirring blades is lower in an initial process at an early stage of the drilling than in a subsequent process.