JP2019078019A - Mining device of marine resources and mining method of the same, and lifting device of marine resources and lifting method of the same - Google Patents

Abstract

To provide a mining device and a mining method of marine resources, and also a lifting device and a lifting method of marine resources, for making it possible to improve a mining efficiency.SOLUTION: This marine resource lifting apparatus 100 comprises a downhole motor 2 which includes a bit 90 driven by using a pressurized and transported leaching solution Ls for leaching as driving fluid M and a nozzle for discharging the leaching solution Ls used for leaching, from a discharge port formed in or near this bit 90 to the outside, thereby the rare earth can be mined while is being beneficiated from the rare earth mud by leaching digging. Therefore, mining efficiency can be improved.SELECTED DRAWING: Figure 6

Description

  The present invention relates to technology for mining marine resources, and more particularly to mining and pumping technology for marine resources suitable for mining rare earth mud present in deep water.

  In 2012, a very high concentration of rare earth containing mud (hereinafter referred to as "rare earth mud") was discovered as a marine resource in the deep sea of the exclusive economic zone of Minamitorishima. Here, as the artificial oil production technology of the submarine oil and the recovery technology of the rare earth mud in the deep sea, there are a pump lift system in which high lift multistage slurry pumps are connected in series at plural locations and collected, and each depth from the air compressor on the ship. An air lift system has been considered in which high pressure air is injected into several places. As a pump lift system, patent document 1 (turbo type) and patent document 2 (diagonal flow type impeller) are disclosed, for example.

Patent No. 5490582 Japanese Patent Application Laid-Open No. 51-72902

  However, the conventional pump lift method has many problems in securing stable operation because the structure of the device is complicated and the weight reduction is difficult, and the reliability of the underwater equipment, especially under high pressure water depth, There is a problem with the durability and reliability of the shaft seal of the submersible motor. In addition, the removal of rare earth mud from deep sea requires a great deal of energy to pump up the depth of the deep water.

In addition, although the air lift system is excellent in reliability and durability as compared to the pump lift system because there are very few underwater devices, the conventional air lift system has poor energy efficiency and requires much more energy than the pump lift system. There is a problem of Therefore, there are remaining issues to be considered in order to improve the concentration efficiency.
Therefore, the present invention has been made focusing on such problems, and it is possible to improve the mining efficiency, a marine resource mining device and a marine resource mining method, and a marine resource lifting device and a marine resource. The task is to provide a lifting and mining method.

Here, the grade of the rare earth contained in the rare earth mud as a marine resource is in ppm order. Therefore, if leaching can be performed on the sea floor before lifting and mining and unnecessary chunks can be removed in advance, the cost for lifting and removing mud can be significantly reduced and the mining efficiency can be improved.
That is, in order to solve the above problems, the marine resource mining apparatus according to one aspect of the present invention is formed in a digging section that drives the pumped leaching leaching solution as a driving fluid, and formed in or near the digging section. And a discharge unit for discharging the leaching solution for leaching to the outside from a discharge port.

The marine resource mining method according to an aspect of the present invention is a marine resource mining apparatus according to an aspect of the present invention, wherein the downhole motor is driven by the leaching solution for reaching and rare earth of the rare earth deposit in the sea. It is characterized in that while leaching mud, the leaching solution for leaching discharged at the time of mining is leaching the rare earth in the rare earth mud in a mining pit.
A marine resource marine resource lifting apparatus according to an aspect of the present invention includes a riser pipe, a drive fluid supply pipe for supplying a leaching leaching solution provided and pumped in the riser pipe as a drive fluid, and the drive. And a marine resource mining apparatus according to an aspect of the present invention installed at the tip of the fluid supply pipe.

  Further, according to another aspect of the present invention, there is provided a method of mining marine resources according to an aspect of the present invention, using the marine resources ocean resources pumping apparatus according to an aspect of the present invention, an arranging step of lowering the riser pipe from shipboard to rare earth deposit; After placement of the riser pipe, the leaching solution for leaching is supplied as a drive fluid from the drive fluid supply pipe, and the downhole motor is excavated in the rare earth mud deposit layer by the advancement of the drive fluid supply pipe itself while the downhole Mining and beneficiary process of leaching rare earth in rare earth mud with leaching solution for leaching injected from motor, and residual pressure at the time of supplying leaching solution for rare earth leaching solution, which rare earth leached in leaching solution for leaching And C. and C. by means of the riser pipe.

  Further, according to a still further aspect of the present invention, there is provided a method of mining marine resources according to an aspect of the present invention, the marine resources ocean resources pumping apparatus according to an aspect of the present invention, the step of arranging the riser pipe down from the ship to the rare earth deposit. After disposing the riser pipe, the leaching solution is supplied as a driving fluid from the driving fluid supply pipe, and the downhole motor is excavated in the rare earth mud deposit layer by the advancement of the driving fluid supply pipe itself. Mining and beneficiary process of leaching the rare earth in the rare earth mud with leaching solution for leaching injected from the hall motor, and the rare earth benzing solution having rare earth leached in the leaching solution for leaching, remaining when supplying the leaching solution for leaching The riser by the pressure and the lift of the air lift by the compressed air injected into the riser pipe Characterized in that it comprises a Ageko step of Ageko a tube, a.

  Further, according to a still further aspect of the present invention, there is provided a method of mining marine resources according to an aspect of the present invention, the marine resources ocean resources pumping apparatus according to an aspect of the present invention, the step of arranging the riser pipe down from the ship to the rare earth deposit. After disposing the riser pipe, the leaching solution is supplied as a driving fluid from the driving fluid supply pipe, and the downhole motor is excavated in the rare earth mud deposit layer by the advancement of the driving fluid supply pipe itself. A mining and beneficiation process for leaching the rare earth in the rare earth mud with leaching solution for leaching injected from a hall motor, and the rare earth mineralization solution having rare earth leached in the leaching solution for leaching stored in a packer provided at the wellhead. Mining and storage process, and the rare earth beneficiary solution stored in the packer by the lift force of the air lift. Characterized in that it comprises a and a Ageko step of Ageko in the riser pipe.

  In the marine resource mining method according to still another aspect of the present invention, an arrangement step of lowering the riser pipe from the ship to the rare earth deposit and a leaching solution for leaching from the drive fluid supply pipe after the arrangement of the riser pipe. As a drive fluid, and by advancing the drive fluid supply pipe itself, while drilling down the downhole motor in the rare earth mud deposit layer, leaching solution for leaching injected from the downhole motor is used to leach the rare earth in the rare earth mud. Leaching and beneficiary process, Reservoir process for storing the rare earth separation solution leached with rare earth in the leaching solution for leaching in a packer provided at the wellhead, and the rare earth stored in the packer And C. a pumping process for pumping ore preparation solution with the riser pipe by the lift force of an air lift. In the process, the lower portion of the riser pipe is held at a position separated from the seabed surface, and the anchor is sunk below the seabed surface to maintain the hanging posture of the collecting skirt, and the lower portion of the riser pipe and the seabed surface A sealed space is provided between the two, and the rare earth mineral concentrate solution is temporarily stored in the sealed space in the storage step, and the lift force of the air lift is stored in the sealed space in the lifting and mining step. It is characterized by collecting by.

  Here, the leaching leaching solution preferably contains an aqueous solution of ammonium sulfate, dilute sulfuric acid or dilute hydrochloric acid. In particular, unlike sulfuric acid and hydrochloric acid generally used in leaching, an ammonium sulfate aqueous solution is also used as a fertilizer, and it can be said that the environmental safety is high. And, if it is an ammonium sulfate aqueous solution, rare earth such as lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), gadolinium (Gd), dysprosium (Dy), etc. in rare earth mud Can be eluted.

According to a marine resource mining apparatus and a marine resource mining method according to an aspect of the present invention, and a marine resource pumping system and a marine resource pumping method, leaching leaching solution is used as a driving fluid for a downhole motor Can be generated in the sea while leaching the rare earth mud sediment layer and leaching the rare earth into the leaching solution for leaching injected from the drilling portion of the downhole motor (hereinafter also referred to as "leaching digging") .
Therefore, if this rare earth beneficiation solution is collected on the sea, it is possible to earn more mining of rare earth. Therefore, according to the marine resource mining device and the marine resource mining method, and the marine resource lifting device and the marine resource lifting method according to an aspect of the present invention, mining efficiency can be improved.

  Here, in the mining method of marine resources according to any one of the aspects of the present invention, the mining and beneficiation step is performed on the rare earth deposit from the entrance of the mining pit as the drilling direction of the downhole motor. It is preferable to drill a pit and to reach a rare earth mud deposit by drilling a lateral hole along the extension direction of the rare earth mud deposit and drilling the pit. With such a configuration, by digging horizontally in the rare earth mud sediment layer along the extending direction of the rare earth mud sediment layer, mining of the rare earth in comparison with the case where the rare earth deposit is excavated vertically You can earn more.

  As described above, according to the present invention, mining efficiency can be improved because mining can be performed while leaching the marine resources by leaching.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of 1st embodiment of the pumping method of the marine resource using the marine resource pumping apparatus provided with the mining apparatus which concerns on this invention, and in the figure, as the whole marine resource pumping system, it anchors on the sea. The state in the middle of the arrangement | positioning process which is submerging the pumping equipment in the sea from a mother ship is shown. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the downhole motor which is 1st embodiment of the mining apparatus which concerns on this invention, and the figure shows the mining apparatus in the cross section along the axis line. It is a graph which shows the leaching rate of various rare earths with respect to the weight concentration of ammonium sulfate aqueous solution which is 1st embodiment of the leaching solution for reaching. It is a graph which shows the relationship of the leaching time of various rare earths and the leaching rate to ammonium sulfate aqueous solution which is the first embodiment of the leaching solution for reaching. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of 1st embodiment of the pumping method of the marine resource which concerns on this invention, and the figure has shown the mining and the beneficiary process which change the drilling direction of a downhole motor from vertical to horizontal, and dig. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a first embodiment of the sea resources lifting and mining method according to the present invention, in which the figure shows a rare earth beneficiation solution in a sealed space of a packer sealing the wellhead of the well in the mining and beneficiation process. Shows a state of storing only for the storage time of BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a first embodiment of the sea resources pumping method according to the present invention, which is a spread of a rare earth mud sedimentary layer while storing a rare earth mineral solution in a sealed space of a packer in a mining and beneficiation process. It shows the condition of drilling a horizontal hole along the existing direction and drilling a mining pit. It is explanatory drawing of 1st embodiment of the pumping method of the marine resource which concerns on this invention, and the figure is stored in the sealed space of a packer after storing rare earth benefication solution for a predetermined storage time in the sealed space of a packer. Fig. 6 shows a lifting and mining process in which compressed rare earth beneficiation solution is injected into a riser pipe by compressed air and recovered by air lift. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a first embodiment of the method of lifting and mining marine resources according to the present invention, which is a step of pulling up the lifting and lowering apparatus onto the seabed surface and moving the lifting and lowering mother ship by a predetermined distance to The moving process for digging is shown. It is explanatory drawing of 1st embodiment of the pumping method of the marine resource which concerns on this invention, and the figure is excavated by changing other mining pits, changing the digging direction of a downhole motor from the vertical to the horizontal direction. It shows the state of repeating the mining and beneficiation process. It is a graph which shows the result of the leaching test of the rare earth mud by the dilute sulfuric acid of 0.2 mol / L which is other embodiment of the leaching solution for reaching. It is a graph which shows the result of the leaching test of the rare earth mud with 0.5 mol / L dilute hydrochloric acid which is other embodiment of the leaching solution for reaching. It is explanatory drawing of 2nd embodiment of the pumping method of the marine resource using the marine resource pumping apparatus provided with the mining apparatus which concerns on this invention, and changes the digging direction of a downhole motor from vertical to horizontal in the figure. It is shown that the rare earth beneficiation solution in which the rare earth has leached in the leaching solution for lifting is lifted by the riser pipe by the residual pressure at the time of feeding the leaching solution while leaching. It is explanatory drawing of 3rd embodiment of the pumping method of the marine resource using the marine resource pumping apparatus provided with the mining apparatus which concerns on this invention, and changes the digging direction of a downhole motor from vertical to horizontal in the figure. The residual pressure at the time of supplying the leaching solution with the leaching solution, and the lift of the airlift by the compressed air injected into the riser pipe by the airlifting means; Indicates that the riser pipe is used to lift or mine. It is explanatory drawing of the downhole motor which is other embodiment of the mining apparatus based on this invention, and the figure shows the mining apparatus in the cross section along the axis line.

Hereinafter, each embodiment of the present invention will be described with reference to the drawings as appropriate. In each embodiment, as a pumping technology for marine resources such as rare earth mud existing in the deep sea, a marine resource mining apparatus and a marine resource mining method, and a marine resource pumping apparatus, replacing the conventional pump lift system and air lift system. And an example of a marine resource pumping system including a method of pumping marine resources.
The drawings are schematic. Therefore, it should be noted that the relationship between the thickness and the plane dimension, the ratio, etc. is different from the actual one, and some parts have different dimensional relationships and ratios among the drawings. In addition, each embodiment shown below illustrates an apparatus and a method for embodying the technical idea of the present invention, and the technical idea of the present invention includes the material, the shape, the structure, and the like of the component. The arrangement and the like are not specified in the following embodiments.

First Embodiment
First, a first embodiment of the present invention will be described.
As shown in FIG. 1, in the marine resource pumping system according to the first embodiment, a mining mother ship 1 anchored on the sea C in a target sea area, and a marine resource pumping device 100 (hereinafter simply referred to as “lifting device”) Also referred to as The mining mother ship 1 of this embodiment is equipped with a beneficiation aqueous solution circulation type mining system using a leaching solution for reaching.

As shown in the figure, at the upper center of the mining mother ship 1, a mining tower 14 equipped with a derrick mechanism for hanging the lifting and lowering apparatus 100 is erected. Below the inboard of the mining boom 14, a riser lifting device and a riser tensioner (not shown) are installed. Also, on the bottom of the mining mother ship 1, a plurality of thrusters are equipped in place.
The riser lifting apparatus is configured to include a lifting and lowering operation of the riser pipe 101 and the drive fluid supply pipe 23 and a device for performing control thereof. The riser tensioner is configured to include a plurality of movable arms capable of correcting and controlling the elevation position of the riser pipe 101 and the drive fluid supply pipe 23 under sea conditions where the wind speed, wave height, and tidal current change from moment to moment. Further, the plurality of thrusters are automatically controlled to be able to hold the mining mother ship 1 at a fixed point by an automatic ship holding system (DPS), and are configured to be able to hold the mining mother ship 1 at a fixed point under changing sea conditions.

  The offshore resource pumping apparatus 100 is deployed in the sea with the axis of the riser pipe 101 in the vertical direction in the sea area where the rare earth mud exists in the deep sea, and the sea bottom B is filled with seawater until the mining mother ship 1 anchored on the sea C. Extended to The marine resource lifting apparatus 100 according to the first embodiment includes a riser pipe 101, an elongated hollow cylindrical drive fluid supply pipe 23 supported substantially coaxially in the riser pipe 101, and a tip of the drive fluid supply pipe 23. And a packer 103 provided at the lower end of the riser pipe 101.

  In the present embodiment, the compressed air supply pipe 102 is piped along the riser pipe 101 so that compressed air can be injected from the offshore mother ship 1 into the packer 103. The compressed air supply pipe 102 of this embodiment has a plurality of branch pipelines 102a, 102b, 102c. The branch conduits 102 a, 102 b, 102 c are respectively connected at appropriate positions in the middle portion of the riser pipe 101 at discrete positions. As a result, compressed air is supplied also to the middle part of the riser pipe 101 from each of the branch pipelines 102a, 102b, 102c, which makes it possible to support stable and stable lifting.

  The packer 103 is attached to the lower part of the riser pipe 101 and is provided with a flexible collecting skirt 104 conically provided to surround the lower opening, and a circle along the lower edge of the collecting skirt 104 It has a lower frame 105 provided annularly, and a plurality of anchors 106 provided at predetermined positions spaced apart in the circumferential direction of the lower frame 105.

  In the packer 103, the downhole motor 2 on which a bit 90 serving as an excavating part is mounted is disposed substantially coaxially at the tip of the drive fluid supply pipe 23. In the packer 103, the inside of the lower frame 105 opens downward. This opening portion is a suction port of a rare earth beneficiation solution Ma described later. The upper center of the packer's 103 collecting skirt 104 is in communication with the riser pipe 101. In addition, the drive fluid supply pipe 23 of the present embodiment constitutes an amble cable in which a power line and a signal line are integrally formed along a pipe line, and supplies the drive fluid to the downhole motor 2 and is necessary. It is possible to supply power and send and receive signals.

The upper end portion of the riser pipe 101 is connected to the lifting equipment of the mining mother ship 1 anchored on the sea, and constitutes a beneficiary solution recovery unit for lifting the rare earth beneficiation solution Ma to the sea. The riser pipe 101 is a long hollow cylindrical pipe line, and is configured by connecting a plurality of riser single pipes substantially coaxially.
Each riser single pipe | tube is suitably comprised using composite reinforced plastic pipes, such as a steel pipe and a carbon fiber reinforced plastic, according to installation depth etc. In addition, a fairing that suppresses unexpected behavior such as vortex excitation vibration is attached to an intermediate portion of the riser pipe 101. At the junction between the packer 103 and the lower end of the riser pipe 101, an unshown blowout prevention device having an emergency detachment mechanism of the riser pipe 101 is provided.

  The marine resource lifting apparatus 100 of this embodiment drives the downhole motor 2 using the leaching solution Ls for leaching which is sent from onboard to the mining bottom of the rare earth mud bed OD through the driving fluid supply pipe 23 as the driving fluid M. Then, the driving fluid M is injected from the bit 90 at the tip of the downhole motor 2 to mine the rare earth mud Dr in the rare earth mud bed OD, and simultaneously with the mining, beneficiation can be performed by the leaching solution Ls for leaching on the seabed B It has become.

In the downhole motor 2 of the present embodiment, as shown in FIG. 2, the fluid motor unit 130 constituting the fluid motor mechanism transmits the rotational drive force using the universal joint 185, with the stator 120 being of a fixed type. Is configured as.
Specifically, as shown in the figure, the downhole motor 2 includes a fluid motor unit 130 located at the lower end of the drive fluid supply pipe 23, a power transmission unit 180 provided at the lower portion of the fluid motor unit 130, and power transmission. And a drive shaft support portion 160 provided at the lower portion of the portion 180.

  A stator 120 having a helical inner circumferential surface is fixed to the fluid motor unit 130 in a cylindrical housing 131. In the stator 120, a rotor 110 having a helical outer peripheral surface is rotatably supported, and a plurality of cavities K are defined between the rotor 110 and the stator 120. Further, the top end of the drive fluid supply pipe 23 for introducing the drive fluid M is connected to the upper portion of the housing 131.

  A drive shaft 140, which is a shaft, is rotatably supported by the drive shaft support portion 160 in a cylindrical housing 170 via a bearing 150 that receives a thrust load and a radial load. The tip of the drive shaft 140 is a bit mounting portion 140s. The bit mounting portion 140 s projects below the housing 170. On the outer peripheral surface of the bit mounting portion 140s, an external thread to which a bit 90 for digging can be connected is formed.

A plurality of communication ports 141 communicating with the inside of the housing 181 of the power transmission unit 180 are formed in the upper portion of the drive shaft 140. The plurality of communication ports 141 are driven by the nozzle 91, which is a discharge portion formed so that the discharge port 91m is opened at the tip of the bit 90 through the communication passage 142 formed along the axial direction of the drive shaft 140. It communicates as a flow path.
The lower end of the rotor 110 and the upper end of the drive shaft 140 respectively project into the housing 181 of the power transmission unit 180, and the lower end of the rotor 110 and the upper end of the drive shaft 140 mutually extend through the universal joint 185. It is connected so that transmission of rotational driving force is possible.

  According to the downhole motor 2, the fluid motor unit 130 is a uniaxial eccentric screw pump by introducing the leaching leaching solution Ls as the high-pressure drive fluid M from the drive fluid supply pipe 23 into the cavity K of the fluid motor unit 130. In the reverse operation of the operation principle of the above, a rotational force is given to the rotor 110 which is a rotating portion, the lower end of the rotor 110 is used as an output shaft, and the rotation of the rotor 110 is achieved by a universal joint having upper and lower joints 182 and 184 and a connecting rod 183 Transmission to the drive shaft 140 is enabled via 185.

  Here, in the downhole motor 2, a bending mechanism 190 capable of bending the housing 181 itself in a range of a predetermined tilt angle is incorporated in the portion of the connecting rod 183. As this type of bending mechanism 190, for example, a known structure disclosed in Japanese Patent No. 3730570 or Japanese Patent No. 5364104 can be adopted.

In the downhole motor 2 of the present embodiment, as shown in the figure, a bending mechanism 190 is provided at a portion of the connecting rod 183. The bending mechanism 190 is provided with a posture detection sensor (not shown), and the mining mother ship 1 anchored on the sea via a power / drive signal supply cable provided in the drive fluid supply pipe 23 which is an amble cable. The operator of can monitor the attitude of the downhole motor 2 at any time.
The bending mechanism 190 according to the present embodiment includes a bending structure 194 capable of bending at a bending portion, and a plurality of regions divided into regions of the plurality of communication ports 141 in the housing 181 to control the bending direction of the housing 181. A pressure chamber 191, a plurality of on-off valves 192 arranged to be able to open and close flow paths for introducing the drive fluid M to the plurality of pressure chambers 191, and the pressure chambers 191 corresponding to the on-off valves 192 And a tilting actuator 193.

  The plurality of on-off valves 192 are opened and closed in response to a drive signal transmitted from a power / drive signal supply cable provided in the drive fluid supply pipe 23 which is an amble cable. Thus, in the bending mechanism 190, when the corresponding pressure chamber 191 is opened and closed according to the opening and closing of the plurality of on-off valves 192, the bending structure 194 is operated by driving the tilting actuator 193 provided in the pressure chamber 191. The pressure chambers 191 in the circumferential direction in the housing 181 mutually cause an intentional pressure imbalance, whereby the drive shaft support portion 160 from the position of the lower joint portion 184 moves to the lower joint portion 184. Centering in the direction of the expected.

[Operation and Effect in First Embodiment]
Next, the operation of the marine resource pumping apparatus 100 according to the first embodiment, the method of pumping marine resources using the same, and the function and effect thereof will be described. Here, in the present embodiment, the rare earth mud sediment layer D is not exposed in the submarine rare earth mud bed OD, and the rare earth mud sediment layer D distributed in the lower part of the deep sea non rare earth mud sediment layer DN It is to collect and collect rare earth mud Dr.

  Specifically, when the rare earth mud Dr is collected by beneficiary, first, as shown in FIG. 1, the mining mother vessel 1 is anchored on the sea of the target area, and the mining mother vessel 1 is held at a fixed point by an automatic ship position holding system. Next, the above-described marine resource pumping apparatus 100 is lowered from the mining yard 14 into the sea, and the marine resource pumping apparatus 100 is disposed at the desired position of the rare earth mud bed OD in the sea. In each pipe of the riser pipe 101, the driving fluid supply pipe 23, and the downhole motor 2, seawater W is initially filled in the seabed.

  In the desired position, as shown in the figure, the packer 103 of the riser pipe 101 is made to face the rare earth mud bed OD. Next, a plurality of anchors 106 are driven to a predetermined depth below the seabed surface by gravity or other placement equipment, and the lower frame 105 abuts the seabed surface without any gap to define an enclosed space in the collecting skirt 104. At this time, since the bit 90 protrudes from the lower end of the packer 103, the downhole motor 2 is disposed at a position where the bit 90 is pressed against the rare earth mud bed OD.

  In the present embodiment, the proximal end portion of the drive fluid supply pipe 23 is connected to the leaching solution storage tank via a drive fluid supply pump (not shown) equipped on the mining mother vessel 1 as a drive fluid inlet. The upper end portion of the riser pipe 101 is connected to a lifting equipment provided to the mining mother vessel 1. Then, the high-pressure leaching solution Ls for leaching is pumped as the driving fluid M from the driving fluid supply pipe 23 from the mining mother ship 1 to the marine resource lifting apparatus 100.

Here, in the present embodiment, an aqueous solution of ammonium sulfate is used as the drive fluid M to make a leaching solution Ls for leaching, and the leaching solution Ls for leaching is supplied from the drive fluid supply pipe 23 to the downhole motor 2 as the drive fluid M. .
In particular, unlike sulfuric acid and hydrochloric acid generally used in leaching, an ammonium sulfate aqueous solution is also used as a fertilizer, and it can be said that the environmental safety is high. And, in the case of an aqueous solution of ammonium sulfate, as shown in FIG. 3, lanthanum (La), praseodymium (Pr), neodymium (Nd), samarium (Sm), gadolinium in rare earth mud at a relatively high leaching rate as shown in FIG. It is possible to elute rare earths such as (Gd) and dysprosium (Dy).
Also, as shown in FIG. 4, lanthanum (La), praseodymium (Pr), neodymium (Nd), samarium (Sm), gadolinium (Gd), in rare earth mud with a relatively high leaching rate even in a relatively short time. It is possible to elute rare earth such as dysprosium (Dy).

  In the marine resource lifting apparatus 100 arranged as described above, at the time of mining work, a high pressure drive fluid M is introduced to the downhole motor 2 from the drive fluid supply path 13 of the drive fluid supply pipe 23 and the housing It is supplied to the upper part of 131 (symbol M1 in FIG. 2). According to the downhole motor 2, by introducing the high-pressure drive fluid M from the drive fluid supply pipe 23 into the cavity K of the fluid motor unit 130, the fluid motor unit 130 reverses the operating principle of the uniaxial eccentric screw pump Thus, the introduction pressure of the drive fluid M is converted into a rotational drive force.

  Thereby, a rotational force is given to the rotor 110 which is a rotating portion, and the fluid motor portion 130 uses the lower end of the rotor 110 as an output shaft, and the rotation of the rotor 110 is transmitted to the drive shaft 140 via the universal joint 185. The bit 90 provided at the tip of the 140 rotates together. Further, the drive fluid M introduced into the housing 181 from the drive fluid supply path 13 is ejected from the nozzle 91 at the tip of the bit 90 to the outside of the device from the plurality of communication ports 141 via the communication path 142.

  Here, in the downhole motor 2, as described above, the bending mechanism 190 capable of bending the housing 181 itself within the range of the predetermined tilt angle is provided at the portion of the connecting rod 183. The drive shaft support portion 160 centers on the lower joint portion 184 by driving the tilting actuator 193 through the power / drive signal supply cable provided to the drive fluid supply pipe 23 which is an amble cable. As, can be operated in the intended direction.

  Therefore, as shown in FIG. 5, the downhole motor 2 is directed to the downhole motor 2 in the direction to which the downhole motor 2 is advanced, up to a predetermined excavation depth with respect to the rare earth mud bed OD, that is, from the entrance F of the mining pit E to the rare earth mud sedimentary layer Drill a pit in the non rare earth mud sediment layer DN up to D and drill a lateral hole along the extension direction of the rare earth mud sediment layer D after excavating to a predetermined excavation depth, ie, after reaching the rare earth mud sediment layer D Then, it is possible to dig the mining pit E.

  As a result, the marine resources lifting apparatus 100 solves the rare earth mud Dr in the rare earth mud bed OD by the drilling power by the rotation of the bit 90 and the fluid power of the leaching leaching solution Ls injected from the nozzle 91 of the bit 90. You can be selective on rare earths while muddy. Then, it is led to the flow by the rotational force of the bit 90 and the residual pressure at the time of supplying the leaching solution for leaching, and the diluted rare earth mud Dr and the leaching leaching solution Ls around it are fed into the packer 103.

  Thereafter, as shown in FIG. 6 in an enlarged manner, by the feed operation U in the horizontal direction according to the feed length in which the drive fluid supply pipe 23 is extended, mining and beneficiation at a predetermined excavation depth are continued, and the drive shaft Bits 90 mounted at the tip of the tip 140 enable efficient mining and beneficiary along the rare earth mud sediment layer D of the rare earth mud bed OD.

  In the present embodiment, the drive fluid supply pipe 23 is fed at a predetermined speed from the mining mother ship 1 on the sea, thereby integrally drilling the downhole motor 2 together with the drive fluid supply pipe 23 in a horizontal direction. It can be mineralized while mining mud Dr continuously. The white arrow in the same figure indicates an image in which the digging direction of the downhole motor 2 is changed from the vertical direction to the horizontal direction by the tilting operation by the bending mechanism 190.

  In particular, according to this marine resource lifting and mining apparatus 100, the drive fluid M having passed through the fluid motor unit 130 passes through the inside of the housing 181 as a drive fluid flow path, and is formed in the bit from the communication port 141 through the communication path 142 in order. It is jetted from the nozzle 91 which is the discharge unit. Then, the rare earth mud Dr can be removed efficiently by cooperation with the digging force by the bit 90 by the fluid force. Thus, the marine resource lifting apparatus 100 supplies the leaching solution Ls for reaching to the downhole motor 2 from the drive fluid supply pipe 23 as the drive fluid M, thereby reducing the rare earth mud Dr of the rare earth mud sediment layer D on the seabed. It can be mineralized while mud down.

  Furthermore, this marine resource lifting and mining apparatus 100 feeds the sedimented rare earth mud Dr into the packer 103 together with the surrounding leaching leaching solution Ls due to the residual pressure when the leaching leaching solution is supplied, and the liquid and liquid are separated in the sea. The rare earth beneficiation solution Ma can be efficiently generated in the pit E and in the packer 103.

  Also, the rare earth mud Dr and the leaching leaching solution Ls introduced into the packer 103 are mixed with each other in the packer 103. Then, the rare earth mud Dr led to the packer 103 contacts the leaching solution Ls for leaching for a long time with the leaching solution Ls for leaching, whereby the rare earth in the rare earth mud Dr is leached more efficiently to the leaching solution Ls for leaching. As a result, the rare earth in the rare earth mud Dr is efficiently beneficiated as a rare earth beneficiation solution Ma which has been liquid-liquid separated in the sea. As the marine resource pumping apparatus 100 continues to be driven, the rare earth beneficiation solution Ma in the packer 103 is gradually filled up to the riser pipe 101 at the top of the packer 103.

  In particular, according to the present embodiment, a compressed air supply pipe 102 as an air lift means for injecting compressed air for lifting into the riser pipe 101, and a packer 103 for sealing the wellhead F of the mining pit E, A packer 103 is mounted on the lower part of the riser pipe 101 and is provided with a flexible collecting skirt 104 provided so as to surround the lower opening, and a plurality of lower parts provided on the lower edge of the collecting skirt 104. Since the anchor 106 is provided, the rare earth dissolving solution Ma in which rare earth is dissolved and the rare earth mud in solution and the leaching solution Ls for leaching are stored in the closed space formed by the packer 103.

  In this sealed space, after storage for a predetermined period of time in which the rare earth is sufficiently dissolved, which is inferred from the leaching time and leaching rate data of various rare earths as shown in FIG. 3 to FIG. The solution Ma can be pumped by air lift by injecting compressed air into the riser pipe 101 from the compressed air supply pipe 102. Therefore, by securing a constant leaching time in the sealed space of the packer 103, it is possible to lift or mineralize the rare earth beneficiation solution Ma selectively and sufficiently leached the rare earth in the rare earth mud Dr. Therefore, it is suitable to raise ore rare earth more efficiently.

  Thereafter, as shown in FIG. 7, compressed air is injected into the packer 103 from the compressed air supply pipe 102 shown in FIG. The arrow which attaches the code | symbol A to the same figure has shown the image which inject | pours compressed air into the packer 103 from the compressed air supply pipe | tube 102. As shown in FIG. As a result, the injected compressed air A and the rare earth beneficiation solution Ma are stirred and mixed in the packer 103 and, as shown in FIG. Float in the riser pipe 101.

  Since the riser pipe 101 is extended to the mining mother ship 1 on the sea, according to the marine resource lifting and mining apparatus 100 of the present embodiment, the rare earth beneficiation solution Ma, residual pressure during leaching leaching solution supply, and riser The lift force of the air lift by the compressed air injected into the pipe 101 enables the recovery pipe to be recovered from the riser pipe 101 to the recovery facility of the offshore mining mother vessel 1.

In particular, in the present embodiment, the compressed air supply pipe 102 has a plurality of branch pipelines 102 a, 102 b, 102 c, and the branch pipelines 102 a, 102 b, 102 c are connected to appropriate positions in the middle of the riser pipe 101. Therefore, compressed air can be supplied to the middle portion of the riser pipe 101 as well. As a result, even when the riser pipe 101 is long, stable lifting can be performed by assisting lifting.
Then, after completion of the above-described series of marine resource lifting processes, as shown in FIG. 9, the downhole motor 2 and the packer 103 are pulled up to the bottom of the deep sea and the mining mother ship 1 is moved a predetermined distance according to the lifting schedule. Then, the above-described series of ocean resources lifting and mining processes are repeated at another position of the rare earth mud bed OD.

  As described above, according to the marine resource lifting apparatus 100 of the first embodiment, the riser pipe 101 which incorporates the driving fluid supply pipe 23 and the compressed air supply pipe 102 is used as the submarine facility, and this riser pipe is used. Only by providing one downhole motor 2 in the packer 103 disposed in the lower part of 101, the excavating force by the rotation of the bit 90 is driven by driving the fluid motor unit 130 that constitutes the fluid motor mechanism by the leaching solution Ls for leaching. The rare earth mud Dr can be mixed with the leaching solution Ls for leaching while the rare earth mud Dr is being mudd with fluid force by injection of the leaching solution Ls for leaching, to form a rare earth beneficiation solution Ma.

  Then, while the rare earth beneficiation solution Ma generated sequentially was moved from the packer 103 to the riser pipe 101 to stabilize the rare earth beneficiation solution Ma, the residual pressure at the time of supplying the leaching solution was extended from the sea bottom to the ship. In the riser pipe 101, the rare earth beneficiation solution Ma can be pumped. Then, the rare earth beneficiation solution Ma can be introduced into the riser pipe 101 from the packer 103 provided at the lower part of the riser pipe due to the residual pressure at the time of supplying the leaching solution for leaching.

  Here, the grade of the rare earth contained in the rare earth mud Dr is in the ppm order. Therefore, if it is possible to carry out leaching on the seabed prior to lifting and removing unnecessary gangue in advance, the cost for lifting mud can be greatly reduced. That is, according to the marine resource lifting and mining apparatus 100 of the first embodiment, stable operation performance can be secured, and mining efficiency can be improved.

  Further, in the case of a turbo type pump as described in Patent Document 1, since the device has a fairly complicated shape, the local shape and the thickness of each portion are strong in high pressure under deep sea (for example, water depth of 6000 m). Sufficient consideration is required. On the other hand, in the case of the marine resource lifting and mining apparatus 100 of the present embodiment, the riser pipe 101 and the downhole motor 2 have a simple shape in a cylindrical shape, so that the shape is superior to the strength correspondence under deep water high pressure. is there. Therefore, it is suitable for securing stable driving performance. Further, the downhole motor 2 of the present embodiment does not rotate the drive fluid supply pipe 23 at the time of mining, so it is advantageous also to the strength and friction of the drive fluid supply pipe 23.

  Furthermore, in the case of a turbo-type pump as described in Patent Document 1, the equipment is so large and complicated in shape that it requires a large lateral width for connecting the plurality of pumps to each other. On the other hand, in the case of the marine resource lifting and mining apparatus 100 of the present embodiment, since the riser pipe 101 and the downhole motor 2 have a cylindrical shape, simple pipe connection is possible.

  Also, in the conventional pump lift method or air lift method, when rare earth mud is removed from the rare earth mud layer distributed under the non-rare earth mud layer in the deep sea, it is not deposited on the upper side of the rare earth mud layer. It is necessary to lift the rare earth mud up to the ship, or to remove the non-rare earth mud sediment layer with a crawler drill or the like before removing the rare earth mud to the ship. On the other hand, according to the present embodiment, equipment such as a crawler drill is not necessary, and efficient beneficiary recovery of rare earth Dr is possible from the rare earth mud sediment layer D distributed under the non rare earth mud sediment layer DN in the deep sea. It becomes.

The marine resource pumping apparatus according to the present invention and the pumping method of marine resources using the same are not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. is there.
For example, in the first embodiment, although an example using an ammonium sulfate aqueous solution as the leaching solution Ls for leaching has been described, the leaching solution Ls for leaching applicable to the present invention is not limited to an ammonium sulfate aqueous solution. Or may contain dilute hydrochloric acid.

  As shown in FIG. 11 as a result of the leaching test of rare earth mud with 0.5 mol / L of dilute hydrochloric acid, even if dilute sulfuric acid is used as leaching solution Ls for leaching, while rare earth is sorted from rare earth mud Dr by leaching. It can be mined. Therefore, mining efficiency can be improved. Also, as shown in FIG. 12 as a result of the leaching test of rare earth mud with 0.5 mol / L dilute hydrochloric acid, even if dilute hydrochloric acid is used as leaching solution Ls for leaching, rare earth is sorted from rare earth mud Dr by leaching. It can be mined. Therefore, mining efficiency can be improved.

  Further, for example, in the first embodiment, as a means for lifting the rare earth beneficiation solution Ma up to the ocean, the residual pressure at the time of supplying the leaching solution for leaching and the lift force of the air lift by the compressed air injected into the riser pipe 101 Although the example which makes the rare earth beneficiation solution Ma float is shown together, it is not limited to this. For example, lifting may be performed only by the residual pressure at the time of supplying the leaching leaching solution, or may be lifted only by the lift of the air lift by the compressed air injected into the riser pipe 101.

Second Embodiment
The second embodiment of the present invention will be described as a specific example.
As shown in FIG. 13, in the second embodiment, the compressed air supply pipe 102 which is the air lift means shown in the first embodiment is not provided, and instead of the packer 103, the wellhead F of the mining pit E Is different in that it comprises a cylindrical anchor 108 for sealing.
The cylindrical anchor 108 surrounds the lower opening of the riser pipe 101 and is designed to be able to seal the wellhead F of the mine E by being driven into the rare earth mud bed OD at the seabed B when the riser pipe 101 is arranged. . The other configuration is the same as that of the first embodiment.

  According to the configuration of the second embodiment, as the submarine equipment, only by providing one downhole motor 2 in the cylindrical anchor 108 disposed at the lower part of the riser pipe 101 incorporating the drive fluid supply pipe 23, Leaching leaching solution Ls drives fluid motor 130 to excavate rare earth mud Dr with drilling force by rotation of bit 90 and fluid force by injection of leaching leaching solution Ls while leaching for rare earth mud Dr and leaching The solution Ls can be mixed to form a rare earth beneficiation solution Ma.

  Then, by feeding the drive fluid supply pipe 23 at a predetermined speed, mining can be performed while rare earth is sorted from rare earth mud Dr by leaching. Therefore, mining efficiency can be improved. Then, depending on the depth, the riser pipe 101 can be lifted or raised by the residual pressure at the time of supplying the leaching leaching solution without using an air lift.

Third Embodiment
In addition, the third embodiment of the present invention will be described as another specific example.
As shown in FIG. 14, the third embodiment is different from the first embodiment in that a cylindrical anchor 108 for sealing the wellhead F of the pit E is provided instead of the packer 103. The other configuration is the same as that of the first embodiment.

  According to the configuration of the third embodiment, as the submarine installation, a cylindrical tube disposed at the lower part of the riser pipe 101 using the riser pipe 101 incorporating the drive fluid supply pipe 23 and additionally providing the compressed air supply pipe 102. Only by providing one downhole motor 2 in the anchor 108, the drilling force by the rotation of the bit 90 and the fluid force by the injection of the leaching solution Ls by rotation of the bit 90 are driven by driving the fluid motor 130 by the leaching solution Ls. The rare earth mud Dr can be mixed with the leaching solution Ls for leaching while being used to mud the rare earth mud Dr to form a rare earth beneficiation solution Ma.

  Then, by feeding the drive fluid supply pipe 23 at a predetermined speed, mining can be performed while rare earth is sorted from rare earth mud Dr by leaching. Therefore, mining efficiency can be improved. The riser pipe 101 can be lifted by the residual pressure at the time of supplying the leaching solution for leaching, and the lift of the air lift by the compressed air injected from the compressed air supply pipe 102 into the riser pipe 101.

[Another embodiment of the downhole motor]
Further, for example, in the first embodiment, the downhole motor 2 uses a screw pump for a fluid motor mechanism and outputs its output to an output shaft via a universal joint, thereby realizing space saving. Although the configuration example for efficiently transmitting the driving force in the fluid motor mechanism has been shown, the present invention is not limited to this, and the output in the fluid motor mechanism may be output to the output shaft without passing through the universal joint.

  Hereinafter, another specific embodiment will be described. In the other embodiment, the fluid motor mechanism for driving the downhole motor is different from the first embodiment (and the second and third embodiments), but the other configuration is the first embodiment (the second embodiment). The second embodiment is the same as the second and third embodiments), so the difference will be described below, and the same or corresponding components as those in the first embodiment (to the second and third embodiments) will be denoted by the same reference numerals. , The explanation is omitted appropriately.

The downhole motor 2 according to the other embodiment includes a hollow cylindrical housing 10 as shown in FIG. In the present embodiment, the tip portion of the drive fluid supply pipe 23 constitutes the upper portion of the housing 10 of the downhole motor 2. Therefore, hereinafter, the tip portion of the drive fluid supply pipe 23 is referred to as "upper housing 11".
The downhole motor 2 has its proximal end connected to the tip of the upper housing 11 (that is, the tip of the drive fluid supply pipe 23). The position of the bit 90 projects from the lower end of the packer 103. As a result, when the high-pressure leaching leaching solution Ls is supplied as the drive fluid M to the drive fluid supply path 13 of the upper housing 11, the downhole motor 2 excavates the rare earth mud OD with the bit 90, The rare earth mud Dr excavated from the floor OD is introduced into the packer 103 together with the leaching solution Ls for leaching.

  Specifically, the housing 10 has an upper housing 11 and a hollow cylindrical lower housing 12 coaxially mounted at the lower end of the upper housing 11. In use, the downhole motor 2 is disposed in the sea with the axis of the housing 10 in the vertical direction. The housing 10 penetrates along the inside in the axial direction, and has openings at the upper end and the lower end, respectively. A drive fluid passage communicating with the upper opening of the housing 10 is a drive fluid supply passage 13 for introducing the drive fluid M into the downhole motor 2.

  In this example, a high-pressure leaching leaching solution Ls is introduced into the drive fluid supply path 13 as the drive fluid M. An upper end portion of the drive fluid supply pipe 23 in which the drive fluid supply path 13 is formed is connected to a leaching solution storage tank for leaching of the mining mother vessel 1 via a drive fluid supply pump (not shown), and the drive fluid supply Make up the department.

  An inlay convex portion 11 t is provided at the lower end of the upper housing 11, and an inlay concave portion 12 d is provided at the upper end of the lower housing 12. The in-row convex portion 11 t and the in-row concave portion 12 d are in-row engaged and are connected to each other in this state. The first shaft 20 is rotatably supported by the upper housing 11, and the second shaft 30 is rotatably supported by the lower housing 12.

  The upper housing 11 is provided with a first shaft support 51 at a lower position in the axial direction. The first shaft support portion 51 includes a plurality of bearings 51 j, and a first bushing 41 and a second bushing 42 mounted so as to sandwich the plurality of bearings 51 j from their upper and lower axial directions with their own flanges, A first seal 61 interposed between the inner peripheral surface of the first bush 41 and the outer peripheral surface of the proximal end 21 of the first shaft 20, the inner peripheral surface of the second bush 42 and the first shaft A second seal 62 interposed between the base 20 and the outer peripheral surface of the proximal end 21 and an annular spindle cap 82 mounted to the lower opening.

  The first shaft support portion 51 includes a plurality of bearings 51 j attached to the concave step in the upper housing 11 and two bushings 41 and 42 on both sides thereof when the first shaft support portion 51 is connected by the inlay fitting. The mounting state is maintained by being pinched in the axial direction by the support shaft cap 82 mounted to the opening.

  In the mounted state, the plurality of bearings 51 j support the base end portion 21 of the first shaft 20 at a position eccentric to the axis of the upper housing 11 by a predetermined eccentric distance E in the mounted state. It is disposed along the axial direction, and rotatably supports the proximal end portion 21 of the first shaft 20 via a plurality of bearings 51 j. On both sides of the plurality of bearings 51 j of the first shaft support portion 51, an outer circumferential surface of the proximal end portion 21 of the first shaft 20 and an inner circumferential surface of the upper housing 11 are formed by the first seal 61 and the second seal 62. The space is sealed.

  The lower housing 12 is provided with two second shaft support portions 52 and 53 spaced apart vertically in the axial direction. The second shaft support portion 52 supporting the upper side includes a plurality of bearings 52 j, a third bushing 43 mounted so as to sandwich the plurality of bearings 52 j from above in the axial direction and the third portion And a third seal 63 interposed between the inner circumferential surface of the bushing 44 and the outer circumferential surface of the second shaft 30.

  In addition, the second shaft support 53 supporting the lower side includes a plurality of bearings 53 j, a fourth bushing 44 mounted so as to sandwich the plurality of bearings 53 j from below in the axial direction by the collar, A fourth seal 64 interposed between the inner circumferential surface of the four bushings 44 and the outer circumferential surface of the second shaft 30 and the annular front cap 81 are configured.

  On the outer peripheral surface of the second shaft 30, a convex step 31m is formed at the central portion in the axial direction, and the side surface on the convex step 31m side of the upper and lower bearings 52j and 53j is a convex step 31m. The mounting state is held by being axially pressed by the mounting of the front cap 81 mounted to the lower opening of the lower housing 12 while being mounted so as to abut the side surface of the lower housing 12. The front cap 81 is fixed from below by a plurality of embedded bolts (not shown).

In the mounted state, the upper and lower second shaft support portions 52, 53 support the outer peripheral surface of the second shaft 30 at positions coaxial with the axis of the lower housing 12, the plurality of bearings 52j, 53j It is disposed along the axial direction, and rotatably supports the outer peripheral surface of the second shaft 30 via a plurality of bearings 52j, 53j.
Further, the upper and lower sides of the plurality of bearings 52j, 53j of the second shaft support portions 52, 53 are the outer peripheral surface of the second shaft 30 and the inner periphery of the lower housing 12 by the third seal 63 and the fourth seal 64. The space between the faces is sealed. In the present embodiment, deep groove ball bearings that receive thrust load and radial load are used as the plurality of bearings 51j, 52j, 53j for supporting the respective shafts 20, 30, but the present invention is not limited thereto. A bearing can be used.

Here, in the downhole motor 2, a drive mechanism unit 70 constituting a fluid motor mechanism is provided in the lower housing 12 described above.
Specifically, the first shaft 20 is integrally configured with the proximal end portion 21 and the inner rotor portion 22 formed on the distal end side of the proximal end portion 21. A drive fluid introduction passage 25 is formed on the upper surface of the proximal end 21 along the axial direction of the proximal end 21 in communication with the drive fluid supply passage 13 described above. The drive fluid introduction path 25 of the base end portion 21 is extended to a position that is a boundary between the base end portion 21 and the inner rotor portion 22.

  A plurality of drive fluid outlets 24 communicate with the distal end portion of the drive fluid introduction path 25 and the inside of the lower housing 12 at a position where the base end portion 21 and the inner rotor portion 22 are separated. Is formed. That is, in the first shaft 20, the first drive fluid introduction passage 23, the second drive fluid introduction passage 25 and the drive fluid discharge port 24 are formed in communication with each other in order from the drive fluid supply passage 13 side. A drive fluid flow path is provided which can discharge the drive fluid M introduced from the first drive fluid introduction path 23 on the side from the drive fluid outlet 24 on the front end side.

  Furthermore, the inner rotor portion 22 extends coaxially downward from the tip end of the proximal end portion 21 of the first shaft 20 in the axial direction, and is externally threaded in the extended portion. It has an outer peripheral surface. On the other hand, the second shaft 30 is formed by integrating a metal hollow cylindrical outer cylinder 31 and a rubber outer rotor portion 32 disposed in the outer cylinder 31, and the outer rotor portion 32 has a female screw shape. Has an inner circumferential surface.

  The drive mechanism 70 includes an outer rotor portion 32 having an (N + 1) thread internal thread on its inner circumferential surface, and an inner rotor portion 22 having an N thread external thread on its outer circumferential surface. The rotation axis line CL1 of the inner rotor section 22 is disposed so as to be parallel two axes separated by a predetermined eccentric distance E with respect to the rotation axis line CL2 of the outer rotor section 32, and the outer rotor together with the inner rotor section 22 The portion 32 is configured to be co-rotatable at a rotation angle of N / (N + 1). However, N is a natural number of 1 or more.

  In this example, in the drive mechanism portion 70, the spiral portion 22r of the inner rotor portion 22 is a left-handed two-row external thread, and the shape of the spiral portion 32r of the outer rotor portion 32 is three in cross section having apexes at intervals of 120 degrees. It is a left-handed triple thread female screw in the shape of a square ring. Then, the spiral portion 22r of the outer peripheral surface of the inner rotor portion 22 is internally provided in the spiral portion 32r of the outer rotor portion 32, and in the mutual gap, cavities K which are sealed spaces independent according to driving are defined at a plurality of axial positions. It is done.

  At the tip of the second shaft 30, a digging bit 90 is mounted. In the present embodiment, the tip end of the outer cylinder 31 of the second shaft 30 projects downward below the lower housing 12 relative to the front cap 81 and is used as a bit mounting portion 33. An external thread capable of connecting the bit 90 is formed on the outer peripheral surface of the bit mounting portion 33, and the base end of the bit 90 is connected to the bit mounting portion 33 at the tip of the second shaft 42. In the lower surface of the bit 90, a nozzle 91, which is a discharge unit for discharging the drive fluid M, is radially branched from the central portion into a plurality of openings, and a high pressure drive fluid M passing through a plurality of cavities K is It is possible to inject from the nozzle 91.

  Thereby, in the downhole motor 2, the inner rotor portion 22 and the outer rotor portion 32 rotate the rotational axis line CL 1 of the inner rotor portion 22 and the rotational axis line CL 2 of the outer rotor portion 32 in parallel and separated by a predetermined eccentric distance E It is freely supported. Then, when driving the downhole motor 2, the drive fluid M is introduced to the upper portion 31 u of the drive mechanism 70 through the drive fluid flow path formed in communication with the inner portion of the first shaft integral with the inner rotor portion 22. The high-pressure drive fluid M flows into the cavity K defined by the inner rotor portion 22 and the outer rotor portion 32.

The high pressure drive fluid M is sequentially introduced into the plurality of cavities K defined in the opposing space between the inner rotor portion 22 and the outer rotor portion 32. The drive mechanism unit 70 starts the co-rotation of the inner rotor unit 22 and the outer rotor unit 32 at a predetermined ratio by the introduction pressure of the drive fluid M acting on the cavity K.
As a result, in the downhole motor 2, the inner rotor portion 22 and the outer rotor portion 32 are rotated at a predetermined ratio according to the principle (reverse operation) of a screw pump, and rotationally driven using the second shaft 30 integral with the outer rotor portion 32 as a drive shaft. The drilling force by the rotation of the bit 90 and the leaching solution Ls for leaching jetted from the nozzle 91 of the bit 90 while rotating the bit 90 attached to the bit mounting portion 33 formed by extending the outer cylinder 31 It has become possible to mud the muddy sediments of the rare earth mud bed OD by the fluid force of the

  That is, in the drive mechanism unit 70, the introduction pressure of the drive fluid M is converted into the rotational drive force of the second shaft 30. When the second shaft 30 is rotationally driven by the drive mechanism unit 70, the bit 90 provided at the tip of the second shaft 30 rotates together. The drive fluid M introduced from the drive fluid supply path 13 passes through the lower position 31s of the drive mechanism 70 (symbol M2 in FIG. 15) and is ejected from the nozzle 91 at the tip of the bit 90 to the outside (FIG. 15). Code M3).

  Thereby, even if it is the marine resource lifting and mining apparatus 100 provided with the downhole motor 2 of the said other embodiment, the drilling force by rotation of the bit 90 similarly to 1st embodiment (or 2nd, 3rd embodiment) And, by the fluid force of the leaching solution Ls for leaching injected from the nozzle 91 of the bit 90, the rare earth mud Dr of the rare earth mud bed OD can be mudd. As a result, the flow is induced by the rotational force of the bit 90 and the residual pressure at the time of supplying the leaching solution for leaching, and the loosened rare earth mud Dr and the leaching leaching solution Ls around it are fed into the packer 103.

  Thereafter, after digging to a predetermined digging depth, as in the first embodiment (or the second and third embodiments), a predetermined digging depth is obtained by a horizontal feed operation according to the extension length of the drive fluid supply pipe. Mining can be continued. Then, by feeding the drive fluid supply pipe 23 at a predetermined speed from the mining mother ship 1 on the sea, as in the first embodiment, the downhole motor 2 is integrally drilled together with the drive fluid supply pipe 23 while being rare earth mud. The rare earth mud Dr can be continuously mined from the floor OD.

  And according to the downhole motor 2 of the said other embodiment, with respect to the said 1st embodiment, the rotational force of the rotor created with the high pressure drive fluid was transmitted to the shaft via a universal joint. As compared with the configuration, since the universal joint is not required for the rotational drive of the outer rotor portion 32, the overall length of the drive mechanism portion 70 can be shortened and configured compact.

  Further, according to the downhole motor 2 of the other embodiment, the universal joint is not required for the rotational drive of the outer rotor portion 32, and the universal joint and the connecting rod are also unnecessary. Is also resolved. Further, the rotational force of the outer rotor portion 32, which is decelerated more than the rotation of the inner rotor portion 22, can be directly transmitted to the bit 90. Therefore, since rotational torque larger than the torque of the first shaft 20 can be efficiently transmitted to the bit 90 provided at the tip of the second shaft 30, higher torque can be coped with.

Furthermore, according to the downhole motor 2 of the other embodiment, the second shaft support portion 52, 53 having the large bearings 52j, 53j for supporting the outer cylinder 31 of the outer rotor portion 32 larger than the outer diameter of the inner rotor portion 22. Can receive the load applied to the bit 90. Therefore, it is possible to provide a more reliable marine resource lifting and mining apparatus 100 while making the entire length of the drive mechanism section 70 compact.
[Summary]

  As described above, according to each of the above-described embodiments, by using the marine resource lifting apparatus provided with the downhole motor using the leaching solution for leaching as the driving fluid, the fluid motor mechanism using the leaching solution for leaching as the driving fluid It is possible to beneficiary while removing rare earth mud by drilling power at the bit and injecting the driving fluid from the nozzle of the bit only by the power to drive the. Furthermore, for efficient leaching, the energy necessary for stirring and mixing the rare earth mud and the leaching leaching solution can be obtained only by the power for driving the fluid motor mechanism.

  And, while the grade of the rare earth contained in the rare earth mud is in the ppm order, according to each embodiment described above, the rare earth mud is leached by bringing the rare earth mud into contact with the leaching solution for leaching in the underground mining pit or packer. Since the rare earth beneficiation solution is recovered from the riser pipe, it is possible to carry out beneficiary on the seabed to remove unnecessary gangue. Therefore, it is possible to greatly improve the mining efficiency and reduce the cost of recovering rare earths significantly, as compared with the lifting and mining method in which all rare earth mud itself is removed from the bottom of the ship and then beneficiated.

DESCRIPTION OF SYMBOLS 1 mining mother ship 2 downhole motor 10 housing 11 upper housing 12 lower housing 13 drive fluid supply path (drive fluid flow path)
14 mining tower 20 first shaft 21 base end 22 inner rotor portion 23 drive fluid supply pipe (drive fluid flow path)
24 Drive fluid outlet (Drive fluid flow path)
25 Drive fluid introduction path (Drive fluid flow path)
30 second shaft 31 outer cylinder 32 outer rotor portion 33 bit mounting portion 41 first bushing 42 second bushing 43 third bushing 44 fourth bushing 51 first shaft support portion 52 second shaft support portion 53 second shaft Support portion 61 First seal 62 Second seal 63 Third seal 64 Fourth seal 70 Drive mechanism (fluid motor mechanism)
81 front cap 82 spindle cap 90 bit (drilling section)
91 nozzle (discharge part)
100 Marine resources pumping equipment 101 Riser pipe 102 Compressed air supply pipe (air lift means)
103 packers 104 collecting skirts 105 lower frame 106 anchors 108 cylindrical anchors 110 rotors 120 stators 130 fluid motors 131 housings 140 drive shafts
141 communication port 142 communication passage 160 drive shaft support portion 170 housing 180 power transmission portion 181 housing 182 joint portion 183 connection rod 184 joint portion 185 universal joint 190 bending mechanism 191 pressure chamber 192 opening / closing valve 193 tilting actuator 194 bending structure A compressed air B Submarine C Oversea E Mining well F Wellhead of the mining well CL1 Axis of rotation of the first shaft CL2 Axis of rotation of the second shaft E Eccentric distance K Cavity M Driving fluid Ls Leaching leach solution (driving fluid)
Ma rare earth beneficiation solution (transfer fluid)
D Rare Earth Mud Deposit (Muddy sediment)
Dr (Ded) Rare Earth Mud (Ocean Resources)
DN Non Rare Earth Mud Deposit (Muddy sediment)
OD Rare Earth Mud (seafloor deposit)
U feed operation W sea water

Claims (15)

A drilling unit driven by using the pumped leaching leaching solution as a driving fluid;
A discharge unit that discharges the leaching leaching solution to the outside from a discharge port formed in the drilling unit or in the vicinity thereof;
A marine resource mining apparatus comprising a downhole motor having:   The marine resource mining apparatus according to claim 1, wherein the leaching leaching solution contains an aqueous solution of ammonium sulfate, dilute sulfuric acid or dilute hydrochloric acid. The downhole motor is
A housing into which the drive fluid is introduced, a stator fixed to the inside of the housing, a rotor disposed inside the stator and rotating on the principle of a screw pump by introducing the drive fluid, a universal joint And a connecting rod connected to the lower end of the rotor and supported by a bearing in the housing so as to rotate with rotation of the rotor, and protruding from the end of the housing at the tip of the shaft The extending portion is provided inside the shaft so as to introduce the drive fluid from the opening at the upper portion of the shaft and lead out from the opening at the lower portion of the shaft to the nozzle which is formed in the excavating portion and constitutes the discharge port. The marine resource mining apparatus according to claim 1 or 2, further comprising: a drive fluid flow path formed as described above. The downhole motor is
A housing into which the driving fluid is introduced, a first shaft whose proximal end is rotatably supported in the housing, and a male screw-like outer periphery extending in the axial direction on the distal end side of the first shaft An inner rotor portion having a surface, a second shaft externally fitted to the inner rotor portion and rotatably supported in the housing, and an internal thread formed on an inner circumferential surface of the second shaft; An outer rotor portion constituting a fluid motor mechanism for rotating the first shaft and the second shaft at a predetermined ratio according to the principle of a screw pump by introducing the drive fluid into a cavity defined by cooperation; The excavating portion extended from the end of the housing to the tip end of the second shaft, and the drive provided on the inside of the first shaft The fluid is introduced from the opening at the upper portion of the first shaft and drawn out from the opening at the lower portion of the first shaft to the upper portion of the outer rotor portion, and is formed in the excavating portion from the opening at the lower portion of the second shaft and constitutes the discharge port The marine resource mining apparatus according to claim 1 or 2, further comprising: a drive fluid flow path formed to be derived. Using the marine resource mining apparatus according to any one of claims 1 to 4,
Leaching the rare earth in the rare earth mud with the leaching solution for leaching discharged at the time of mining while driving the downhole motor with the leaching solution for mining to mine the rare earth mud of the rare earth deposit in the sea Method of mining marine resources characterized by   5. A riser pipe, a drive fluid supply pipe provided in the riser pipe for supplying a leaching leaching solution pumped and fed as a drive fluid, and any one of the first to fourth inventions provided at the tip of the drive fluid supply pipe. And a marine resource mining apparatus according to the above item.   The marine resource lifting and mining apparatus according to claim 6, further comprising a cylindrical anchor surrounding the lower opening of the riser pipe and being driven into the sea bed to seal the wellhead of the well when the riser pipe is arranged.   The marine resource lifting apparatus according to claim 7, further comprising an air lift means for injecting compressed air for lifting into the riser pipe.   The marine resource lifting apparatus according to claim 6, further comprising a packer for sealing the wellhead of the wellbore, and an airlift means for injecting compressed air for lifting into the riser pipe.   The packer is mounted on a lower portion of the riser pipe and is provided with a flexible collecting skirt provided to surround the lower opening, and a plurality of anchors provided at the lower edge of the collecting skirt. 10. A marine resource lifting and mining apparatus according to claim 9, comprising: A marine resource pumping apparatus according to claim 6 or 7,
Placing the riser pipe down from the ship to the rare earth deposit;
After disposing the riser pipe, the leaching solution is supplied as a driving fluid from the driving fluid supply pipe, and the downhole motor is excavated in the rare earth mud deposit layer by the advancement of the driving fluid supply pipe itself. Mining and mineral separation process in which rare earth in the rare earth mud is leached with leaching solution for leaching injected from a hall motor;
And c) lifting the rare earth beneficiation solution in which the rare earth is leached in the leaching leaching solution with the riser pipe by the residual pressure at the time of supplying the leaching leaching solution. Mining method. A marine resource pumping apparatus according to claim 8;
Placing the riser pipe down from the ship to the rare earth deposit;
After disposing the riser pipe, the leaching solution is supplied as a driving fluid from the driving fluid supply pipe, and the downhole motor is excavated in the rare earth mud deposit layer by the advancement of the driving fluid supply pipe itself. Mining and mineral separation process in which rare earth in the rare earth mud is leached with leaching solution for leaching injected from a hall motor;
The rare earth beneficiation solution in which the rare earth is leached in the leaching solution for leaching is the residual pressure at the time of supplying the leaching solution for leaching, and the lift of air lift by compressed air injected into the riser pipe by the air lift means. A method of lifting and mining marine resources, comprising: a lifting and mining process for lifting and mining with a riser pipe. A marine resource pumping apparatus according to claim 9,
Placing the riser pipe down from the ship to the rare earth deposit;
After disposing the riser pipe, the leaching solution is supplied as a driving fluid from the driving fluid supply pipe, and the downhole motor is excavated in the rare earth mud deposit layer by the advancement of the driving fluid supply pipe itself. Mining and mineral separation process in which rare earth in the rare earth mud is leached with leaching solution for leaching injected from a hall motor;
A storage step of storing a rare earth beneficiation solution in which rare earth is leached in the leaching leaching solution in a packer provided at the wellhead;
And c. A method of lifting and mining the rare earth beneficiary solution stored in the packer with the riser pipe by the lift force of the air lift. A marine resource pumping apparatus according to claim 10,
Placing the riser pipe down from the ship to the rare earth deposit;
After disposing the riser pipe, the leaching solution is supplied as a driving fluid from the driving fluid supply pipe, and the downhole motor is excavated in the rare earth mud deposit layer by the advancement of the driving fluid supply pipe itself. Mining and mineral separation process in which rare earth in the rare earth mud is leached with leaching solution for leaching injected from a hall motor;
A storage step of storing a rare earth beneficiation solution in which rare earth is leached in the leaching leaching solution in a packer provided at the wellhead;
And c) lifting the rare earth beneficiary solution stored in the packer with the riser pipe by the lift force of the air lift;
In the placement step, the lower portion of the riser pipe is held at a position separated from the seabed surface, and the anchor is sunk below the seabed surface to hold the hanging posture of the collecting skirt, thereby lowering the lower portion of the riser pipe. Provide a sealed space between the seabed and the seabed,
In the storage step, the rare earth mineral concentrate solution is temporarily stored in the sealed space,
A method of lifting and mining marine resources, comprising: collecting rare earth beneficiation solution stored in the sealed space by lift force of the air lift in the lifting and mining process.   In the mining and separation process, as the drilling direction of the downhole motor, the rare earth deposit is excavated in a pit from the entrance to the rare earth mud deposit to the rare earth deposit, and after reaching the rare earth mud deposit, the rare earth mud deposit The method according to any one of claims 11 to 14, wherein a horizontal hole is excavated along the layer extension direction to dig the mine.

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