JP6295090B2 - Resource recovery system - Google Patents

Description

  The present invention relates to the recovery of flammable gases such as methane gas from a gas hydrate layer existing in layers near the surface of the sea surface, underground or in a cold region, and the recovery of rare metals existing near the gas hydrate layer It relates to the recovery of shale gas from the shale layer.

  In general, natural gas often exists in a gas state in a gas layer existing in the ground, and can be recovered relatively easily by excavating the gas layer, and is widely used commercially.

For such conventional natural gas, there is a non-conventional natural gas that has not been established for recovery or is not commercially available due to low productivity. Among such unconventional natural gas, gas hydrate and shale gas have attracted attention in recent years.
In addition, it is known that a large amount of rare metal is buried in the seabed where gas hydrate is most abundant.

Since the gas hydrate is filled with natural gas (methane gas or ethane gas) at high density, the gas hydrate is theoretically converted to gas in the standard state in 1 m ^{3 of} gas hydrate. will be natural gas of 170m ³ is included, it has attracted a great deal of attention as an energy source for the next generation.
In recent years, shale gas has attracted a great deal of attention as a new energy source to replace petroleum because of the establishment of excavation and recovery technologies (horizontal wells and hydraulic fracturing). I'm starting to break.

Since the gas hydrate exists under conditions of low temperature and high pressure as described above, the gas hydrate is decomposed and separated into gas and water by increasing the temperature or decreasing the pressure. For this reason, as a typical method for recovering gas from gas hydrate, hot water or the like is injected as heat energy into the gas hydrate layer existing in the seabed or underground ground, and the gas hydrate is gasified in the ground. There is known a method of separating the gas into water and recovering the gas to the surface in a gaseous state.
In addition, a method has been established in which shale gas is recovered from the shale gap by digging a number of wells horizontally along the shale layer and forming a plurality of cracks in the wells by hydraulic fracturing.

However, in order to decompose the gas hydrate and recover the gas, a temperature increase of several tens of degrees Celsius is required under the same pressure. Furthermore, taking into account the latent heat for melting ice, a lot of heat energy is required, and this hot water has to be supplied to the seabed at a depth of several hundreds of meters, usually where the gas hydrate layer exists. . In addition, since a large amount of hot water is supplied to the gas hydrate layer existing in the ground, the same amount of water as the supplied hot water must be collected together with gas from the seabed at a depth of several hundred meters. It needed a lot of power to pump up the water. In addition, when using electric power as a heat source for overheating, the electric power must be supplied to the seabed at a depth of several hundreds of meters, resulting in a large voltage drop and high energy efficiency even when using electric power. It was difficult to do.
In addition, there is a survey result that the fault in the area where shale gas is buried became slippery due to the hydraulic fracturing in the shale gas recovery, and the earthquake was more likely to occur.

  The gas recovery system according to Patent Document 1 addresses these problems, and is a gas recovery system from a gas hydrate layer that is highly energy efficient and does not require a large amount of water to be pumped and is profitable.

Japanese Patent No. 4707502

However, the gas recovery system from the gas hydrate layer according to Patent Document 1 is a system for recovering the combustible gas from the gas hydrate layer to the last, and no mechanism for recovering the rare metal together with the gas recovery is disclosed. .
Moreover, in the recovery system of shale gas from the shale layer according to Patent Document 1, the problem that the fault becomes slippery is not solved at all.

Accordingly, a first object of the present invention is to provide a gas or rare metal recovery system capable of performing either or both of gas recovery and rare metal recovery from a gas hydrate layer or a rare metal layer.
A second object of the present invention is to provide a gas or rare metal recovery system that generates as little waste as possible when performing gas recovery and rare metal recovery.
A third object of the present invention is to provide a shale gas recovery system in which a fault does not easily slip when recovering shale gas from a shale layer.

  In order to solve the above problems, the present invention provides a pile driving device that sequentially drives hollow piles from a seabed toward a gas hydrate layer or a rare metal layer, and a gas hydrate layer or a rare metal layer inside the hollow pile that has been piled. Disposal device that disposes the upper layer as waste mud and the gas adjacent to the hollow pile or the inside of the hollow pile after recovery of the rare metal, the stirring device for stirring the gas hydrate layer or rare metal layer inside the hollow pile, and the stirred hollow High-pressure water or high-pressure liquid gas is sent to the gas hydrate layer or rare metal layer inside the pile, and the high-pressure feed pipe that uses the gas hydrate layer or rare metal layer as recovered mud and recovered gas; The pile driving device is equipped with a recovery pipe that pumps the recovered gas to the specified storage part. The providing resource recovery system, characterized in that the piling.

  The pile driving device, after all the hollow piles have been driven around the reference hollow pile, around one of the hollow piles adjacent to the reference hollow pile, It is preferable to pile up the piles sequentially.

  Also, the hollow pile before gas hydrate or rare metal recovery is sealed with a lid, and each of the disposal device, stirrer, high-pressure liquid feeding pipe, and recovery pipe is installed in the hollow pile after gas hydrate or rare metal recovery. It is preferable to further include a sealing switching device for switching from a gas hydrate or a hollow pile before recovering the rare metal.

  Moreover, the pile driving device can also serve as a sealing switching device.

  Further, the high-pressure liquid feeding pipe further includes a heating device, and the heating device heats high-pressure water or high-pressure liquid gas fed to the gas hydrate layer or the rare metal layer inside the hollow pile in advance to increase the temperature and pressure. It is preferable to use water or a liquid gas of high temperature and pressure.

  In addition, it is preferable that the recovery pipe further includes a heating device, and the heating device heats the recovered mud liquid and the recovered gas so that the recovered mud liquid is not frozen during the recovery.

  The heating device is installed in the vicinity of the heated member that is at least a part of the high-pressure liquid feeding pipe or at least a part of the recovery pipe, or the heated member that is disposed in the high-pressure liquid feeding pipe or the collecting pipe. It is preferable that the member to be heated is induction-heated by the induction portion.

  The heating device heats the high-pressure water, the high-pressure liquid gas, or the recovered mud liquid by passing an electric current through at least a part of the high-pressure liquid feeding pipe or a carbon material or a metal material constituting at least a part of the recovery pipe. It is preferable.

  The disposal device comprises a stirrer, and a tip portion of a high-pressure liquid feeding pipe and a tip portion of a recovery pipe. The stirrer stirs the waste mud in the upper layer inside the hollow pile and the tip portion of the high-pressure liquid feeding tube. Sends high-pressure water or high-pressure liquid gas to the upper-layer waste mud inside the agitated hollow pile, and the upper-layer waste mud is used as waste mud. It is preferable that the waste mud is pumped up to a waste channel installed toward an adjacent gas hydrate or hollow pile after recovery of the rare metal.

  Moreover, a hollow pile can be connected sequentially in a longitudinal direction.

  Moreover, it is preferable that a storage part is installed in the mega float arrange | positioned on the sea surface.

  The present invention is also a resource recovery system for recovering gas from a gas hydrate layer, recovering rare metal from a rare metal layer, or recovering gas from a shale layer, and sends high-pressure water or high-pressure liquid gas. It is possible to recover resources from the gas hydrate layer, rare metal layer, or shale layer, and has a resource recovery pipe that pumps the recovered resources to a predetermined storage section. A resource recovery system characterized by further comprising a heating device that heats the recovered resource to heat the recovered resource so that the recovered resource is not frozen during the recovery, by heating the liquid gas to high temperature / high pressure water or high temperature / high pressure liquid gas. To do.

  The heating device includes a heated member that is at least a part of the resource recovery pipe or a heated member that is disposed in the resource recovery pipe, and an induction unit that is installed in the vicinity of the heated member. It is preferable to heat the member by induction heating.

  It is preferable that the heating device heats the high-pressure water or the high-pressure liquid gas or the recovered resource by passing an electric current through the carbon material or the metal material constituting at least a part of the resource recovery pipe.

Further, resource recovery tube, and a high-pressure liquid feed tube for feeding high pressure water or high pressure liquid gas, it is preferable to recover resources is a double pipe consisting of a collecting tube to pump up to a predetermined storage portion.

Further, the outer double pipe with high-pressure liquid feed tube, it is preferable that the inside of the double pipe and the recovery pipe.

The gas hydrate layer on the tip, further comprising a drilling mechanism drilling while rotating the rare metal layer, or shale layer, the rotation of the drilling mechanism, the pressure difference caused by the Venturi effect between the high-pressure liquid feed tube and the collection tube A power source is preferable.

  The present invention is also a resource recovery system for recovering gas from a gas hydrate layer, recovering rare metal from a rare metal layer, or recovering gas from a shale layer, and sends high-pressure water or high-pressure liquid gas. It is possible to recover resources from the gas hydrate layer, rare metal layer, or shale layer, equipped with a resource recovery pipe that pumps the recovered resources to the specified storage part, and cement powder in high pressure water or high pressure liquid gas A resource recovery system is provided in which a gas hydrate layer, a rare metal layer, or a shale layer is crushed with high-pressure water or high-pressure liquid gas mixed with cement powder.

  Moreover, it is preferable that the cement powder is obtained by firing the inside or outside of the powder with microwaves.

  The resource recovery pipe heats the high-pressure water or high-pressure liquid gas that is fed into high-temperature high-pressure water or high-temperature high-pressure liquid gas, and heats the recovery resources so that the recovery resources do not freeze during recovery. It is preferable to further have a heating device.

  The liquid gas is preferably liquefied petroleum gas or liquefied carbon dioxide gas.

Further, the present invention provides a pile driving device for driving a hollow pile from a seabed toward a gas hydrate layer or a rare metal layer, a gas hydrate layer or an upper layer of a rare metal layer, a gas hydrate layer or a rare metal layer inside the hollow pile. High-pressure water or high-pressure liquid gas is fed to the agitator and agitating upper layer, gas hydrate layer or rare metal layer inside the hollow pile, the upper layer is used as waste mud, and the gas hydrate layer or The pile driving device is equipped with a high-pressure liquid feed pipe that uses the rare metal layer as the recovered mud and recovered gas, and a recovery pipe that pumps up the waste mud, recovered mud, and recovered gas to the specified reservoir. An outer pile driving portion, an inner pile driving portion for driving the inner hollow pile, and a cylinder for connecting the outer pile driving portion and the inner pile driving portion; The Chi unit provides a resource recovery system for the outer hollow pile and the inner hollow pile is rotated in different directions and outer hollow pile and the inner hollow piles, characterized in that the piling.

  In addition, an inclination sensor for detecting the inclination of the center axis of the pile driving device and an inclination of the center axis of the pile driving device detected by the inclination sensor so that the outer hollow pile and the inner hollow pile are piled in the vertical direction. It is preferable to provide a pile driving control unit that controls the rotational speeds of the outer hollow pile and the inner hollow pile so as to correct.

In addition, the pile driving control unit rotates the inner hollow pile while pressing the inner hollow pile with the cylinder while the outer hollow pile is fixed, drives the inner hollow pile, and pulls the outer hollow pile with the inner hollow pile fixed. It is preferable to control each of the outer pile driving portion, the inner pile driving portion, and the cylinder so that the outer hollow pile is piled while rotating.

According to the present invention, together with gas recovery from the gas hydrate layer, when a large amount of rare metal is present in the vicinity of the gas hydrate layer, it is possible to recover the rare metal.
In addition, the amount of waste discharged in the gas recovery from the gas hydrate layer and the like and the rare metal recovery can be suppressed.
Further, since the ground is strengthened when collecting the shale gas from the shale layer, the fault does not easily slip.

It is a figure which shows the whole structure of the resource recovery system from the gas hydrate layer, rare metal layer, or shale layer concerning Embodiment 1 of this invention. It is sectional drawing of the longitudinal direction which shows schematic structure of the resource recovery apparatus in the resource recovery system shown in FIG. In the resource recovery system which concerns on Embodiment 1 of this invention, it is explanatory drawing of prior preparation for collect | recovering gas or a rare metal. It is a top view of the pile driving device which piles up in the prior preparation shown in FIG. It is a side view of a piling apparatus shown in FIG. It is explanatory drawing in the case of performing pile driving | running | working one by one by the pile driving apparatus shown to FIG. 4 and FIG. (A) is an external appearance side view of the resource recovery pipe | tube of the resource recovery system which concerns on Embodiment 2 of this invention, (B) is sectional drawing of the resource recovery pipe | tube of (A). It is sectional drawing of the resource collection pipe | tube of the resource collection system which concerns on Embodiment 3 of this invention. It is sectional drawing of the resource collection pipe | tube of the resource collection system which concerns on Embodiment 4 of this invention. It is sectional drawing of the resource recovery pipe | tube of the resource recovery system which concerns on Embodiment 5 of this invention. It is sectional drawing of the resource collection pipe | tube of the resource collection system which concerns on Embodiment 6 of this invention. It is sectional drawing of the resource recovery pipe | tube of the resource recovery system which concerns on Embodiment 7 of this invention. (A) and (B) is a schematic view showing a cross section of resource recovery tube resource recovery system according to the eighth embodiment of the present invention and a heating device. It is sectional drawing which shows the excavation mechanism installed in the front-end | tip part of the resource recovery system which concerns on Embodiment 9 of this invention. (A) And (B) is an expanded sectional view of the cement particle used for the expansion and reinforcement of the crack of a shale layer in the resource recovery system concerning Embodiment 10 of the present invention. It is sectional drawing of the pile driving device of the resource recovery system which concerns on Embodiment 11 of this invention. (A)-(D) are explanatory drawings in the case of performing pile driving | operation with the pile driving apparatus of FIG.

Hereinafter, a resource recovery system according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
Embodiment 1
FIG. 1 is a diagram showing a schematic configuration of a resource recovery system 10 from a gas hydrate layer or a rare metal layer according to Embodiment 1 of the present invention. Here, the case where gas hydrate or rare metal exists in a layered manner on the seabed at a depth of several hundred meters below the sea surface, which is the most common form of the existence position of gas hydrate or rare metal, will be described as an example.

As shown in FIG. 1, the resource recovery system 10 from a gas hydrate layer or a rare metal layer according to the present embodiment includes a gas hydrate layer or a rare metal layer 44 that exists in layers near the sea bottom 40 under the sea surface 24. A plurality of hollow piles 50 to reach, a multiple pipe 11 extending from at least one hollow pile 50A among the plurality of hollow piles 50 to the sea surface 24, and a structure 26 constructed on the sea surface 24 and connected to the multiple pipe 11 Consists of.
Multiple tube 11, an outer tube 12, installed inside of the outer cylinder 12, the supply pipe 18 (high-pressure liquid feed pipe 15), made of conductive path 22. of the recovery tube 16 and the signal line 20 for transmitting and receiving signals.

In the hollow pile 50A that multiple tube 11 is connected above, placed through the lid 51 which is installed from the multi-tube 11 above the top of the hollow pile 50A, a high-pressure liquid feed pipe 15 and recovery pipe 16 Is done.
In addition, in the hollow pile 50B before the gas or rare metal is recovered, the upper stratum (sea floor) 40 and the gas hydrate layer or rare metal layer 44 are present as they are, and after the gas or rare metal is recovered In the hollow pile 50C, for example, the multiple pipe 11 is connected, and the mud of the upper formation 40 of the hollow pile 50A from which gas or rare metal is recovered is discarded as waste mud.

A liquefied gas supply device 28, an air supply device 30, a water supply device (high pressure pump) 35, a gas tank 36, and a control device 32 are installed inside the structure 26 to which the multiple pipe 11 is connected.
The liquefied gas supply device 28, the air supply device 30, and the water supply device 35 supply combustible gas, air, and water through the supply pipe 18 (the high pressure liquid supply pipe 15) , and the control device 32 passes through the signal line 20. Controls excavation and combustion of combustible gas by sending and receiving control signals.

The resource recovery system 10 has, for example, a double structure of an outer cylinder 12 and an inner cylinder 14. The inside of the inner cylinder 14 is a recovery pipe 16 that recovers and conveys gas (methane gas or ethane gas) generated by decomposing gas hydrate, and the gap between the outer cylinder 12 and the inner cylinder 14 is A combustible gas and air supplied separately as a heat source from the outside, and a supply pipe 18 (high-pressure liquid feed pipe 15) for supplying water that becomes superheated steam as a medium for heating the gas hydrate, and a signal for transmitting and receiving signals This is a conduction path 22 of the line 20.

The upper end of the resource recovery system 10 is connected to a structure 26 constructed on the sea surface 24 (or on the shore). Inside the structure 26, a liquefied gas supply device 28, an air supply device 30, A water supply device 35, a gas tank 36, and a control device 32 are installed. The structure 26 may be a mega float that floats on the ocean.

  In addition, the gas tank 36 is connected to the recovery pipe 16 and constitutes a part of a storage unit in which moisture, mud, and gravel are separated and purified gas is temporarily stored. The gas stored in the gas tank 36 is carried out by a pipeline and filled in a desired transport tank, or hydrated again and transported to the outside of the structure 26. The storage unit is not limited to the gas tank 36 described above, and may include a storage tank such as a rare metal.

  Further, an excavation mechanism 38 is provided at the lower end (tip) of the resource recovery system 10, and the excavation mechanism 38 excavates and penetrates the upper stratum 40, so that the upper stratum 40 and the lower strata 42 A resource recovery device 46 formed at the tip of the resource recovery system 10 is inserted into the gas hydrate layer 44 existing therebetween. The excavation mechanism 38 described above is the stirring device of the present invention that stirs the gas hydrate layer 44 and the like and stirs the upper formation 40 that is waste mud.

For example, as shown in FIG. 2, the resource recovery device 46 includes a thermal energy generation device 48, a thermal power generation device 49, and a gas recovery port 68 installed inside the multiple pipe of the resource recovery system 10.
The thermal energy generator 48 includes a water supply pipe 56, a steam generator 58, a superheated steam generator 60, and a filter 67, and the water supply pipe 56 is connected to the cylindrical member 61 by a steam supply pipe 64. The steam generator 58 includes a heater 62 installed in the water supply pipe 56 and an electromagnetic valve (not shown) installed in the steam supply pipe 64. The superheated steam generator 60 includes a cylindrical member 61 composed of a first tube 52 and a second tube 54 and a high-frequency heating device 66 installed on the second tube 54. Further, the filter 67 is installed inside the outer cylinder 12 and in the opening of the first pipe 52. The filter 67 can be moved from the opening of the first tube 52.

The water supply pipe 56 supplies water for steam generation to the steam generator 58. The water passes through the water supply pipe 56, is heated by a heater 62 installed in front of the cylindrical member 61 including the first pipe 52 and the second pipe 54, and becomes steam to be inclined with respect to the cylindrical member 61. It is ejected from the steam supply pipe 64 connected to the second tube 54 of the tubular member 61.
The heater 62 of the steam generator 58 heats the water passing through the water supply pipe 56 into steam, and jets the steam to the steam supply pipe 64 . An electromagnetic valve (not shown) of the steam generator 58 opens and closes based on the control signal from the control device 32 described above. When an electromagnetic valve (not shown) is opened, steam is ejected from the steam supply pipe 64 into the cylindrical member 61.

The tubular member 61 of the superheated steam generator 60 is constituted by a first tube 52 and a second tube 54, and the first tube 52 and the second tube 54 are inclined toward the gas hydrate layer, respectively. Open.
In addition, the steam supply pipe 64 is connected to the second pipe 54 and opens in an inclined manner toward the first pipe 52.

  Moreover, the high frequency heating device 66 of the superheated steam generation device 60 is disposed around each of the second pipes 54 and further heats the steam ejected from the steam supply pipe 64 into the cylindrical member 61 to generate superheated steam. To do. In addition, as a high frequency electromagnetic wave used here, a thing with a frequency of about several hundred megahertz-dozens of terahertz is used suitably. In particular, the terahertz class has the effect of accelerating the decomposition of gas hydrate by penetrating deeply into the inside of the gas hydrate and electromagnetic waves of the frequency (generally hundreds to thousands of megahertz) used for the decomposition of gas hydrate. It is also effective to use an appropriate combination with electromagnetic waves having the above frequency.

Filter 67, an inner of the outer cylinder 12, is installed so as to a control signal from the control unit 32 covers the opening of the first tube 52 of the tubular member 61, remove the control signal from the control unit 32 possible it is. The filter 67 may be configured by, for example, a cylindrical wire filter along the inner peripheral surface of the outer cylinder 12 of the resource recovery system 10. Further, the filter 67 may be moved up and down by, for example, a motor supplied with electric power from the thermal power generation device 49, or may be moved up and down by vapor pressure.

The thermal power generation device 49 includes a combustible gas supply pipe 70, an air supply pipe 72, a combustion chamber 74, a burner 76, a turbine 78, a generator including a rotor 80 and a stator 82, a rotating shaft 84, and an exhaust path 86. It is comprised by.
The combustible gas supply pipe 70 and the air supply pipe 72 supply the combustible gas and air to the combustion chamber 74 independently from the outside.
In the combustion chamber 74, the combustible gas and air supplied from the combustible gas supply pipe 70 and the air supply pipe 72 are mixed and burned by the burner 76 installed in front of the combustion chamber 74, and combustion gas is generated.
The turbine 78 is connected to the rotor 80 of the generator by a rotating shaft 84 rotatably supported by a bearing device (not shown), and is installed behind the combustion chamber 74 to supply high-speed fuel gas. It rotates at high speed.

The generator includes a rotatable rotor 80 and a stator 82, and power is generated by the rotor 80 rotating with respect to the stator 82.
Since the rotor 80 is connected by the turbine 78 and the rotating shaft 84, the rotor 78 is rotated by the rotation of the turbine 78. The stator 82 receives the rotation of the rotor 80 to generate electric power, and supplies power to the heater 62 of the steam generator 58, an electromagnetic valve (not shown), the high-frequency heating device 66 of the superheated steam generator 60, and the like.

  The exhaust path 86 exhausts the combustion gas burned in the combustion chamber 74 to the outside. In the present embodiment, the turbine 78 is rotated again as a waste heat turbine in the middle of the exhaust path 86 to increase the power generation efficiency. Further, the exhaust passage 86 heats the surrounding gas hydrate layer by returning to the outer peripheral portion of the resource recovery system 10, and refluxes the outside of the water supply pipe 56 to freeze the water in the water supply pipe 56. To prevent. The exhaust path 86 may include a blower (not shown) that creates a flow in the exhaust direction. By creating a flow in the exhaust direction with the blower, exhaust can be performed smoothly. The exhaust path 86 is connected to, for example, an opening (not shown) installed in the outer cylinder 12, and the exhaust gas cooled through the exhaust path 86 may be exhausted into the sea or the like through an opening (not shown). In addition, the opening part which is not illustrated opens in the sea etc., preventing intrusion of seawater etc. in the case of exhaust_gas | exhaustion.

  The gas recovery port 68 recovers the gas hydrate (gas) that has been heated by the heat energy of the superheated steam and has melted and flowed, and transports it to the recovery pipe 16. The gas recovery port 68 is provided with a strainer and a filter (not shown) so that foreign matter such as earth and sand and gravel does not enter during gas recovery.

Next, the gas recovery operation of the resource recovery system 10 according to Embodiment 1 of the present invention will be described.
The resource recovery system 10 digs the upper formation 40 in the sea by an excavation mechanism 38 installed at the tip of the resource recovery system 10, and the inside of the gas hydrate layer 44 existing between the upper formation 40 and the lower formation 42 in the sea. And the resource recovery device 46 is installed inside the gas hydrate layer 44.
During excavation, the thermal energy generation device 48 of the resource recovery device 46 closes an electromagnetic valve (not shown) to prevent water from flowing back into the steam supply pipe 64, Prevents gravel from entering.

  The thermal energy generation device 48 of the resource recovery device 46 receives a control signal for gas hydrate recovery from the control device, opens an electromagnetic valve (not shown), and passes the steam heated by the heater 62 through the steam supply pipe 64 to the second. Supply to tube 54. The steam ejected to the second pipe 54 is further heated to a superheated steam by a high-frequency heating device 66 installed around the second pipe 54, and becomes a high-speed air stream. It is ejected from the opening toward the gas hydrate layer, and the surrounding gas hydrate is heated and separated into gas and water. The high-speed airflow ejected toward the gas hydrate layer becomes a circulation flow containing gas, water, and steam, and a part of the circulation flow is a filter installed in front of the opening of the first pipe 52. The flow returns to the first pipe 52 through 67. The reflux is superheated again by the high-frequency heating device 66 installed around the second pipe 54 together with the steam supplied from the steam supply pipe 64, and ejected from the opening of the second pipe 54 again.

  The recovery port 68 recovers the gas from the circulating flow of the gas hydrate heated by the heat energy of the superheated steam and flowing into the recovery pipe 16 and transports the recovered gas to the recovery pipe 16. In addition, since the strainer and the filter are installed in the collection port 68, water and impurities are removed, and only the gas is collected in the collection pipe 16.

  The resource recovery system according to the first embodiment includes the resource recovery device 46 described above, and performs recovery while decomposing gas hydrate into hydrate gas by a circulating flow of superheated steam. It can be carried out. Further, the present invention is not limited to the above-described gas hydrate, and the rare metal can be recovered in the same manner as the gas hydrate using a circulating flow of superheated steam. For rare metal recovery, combustible gas or carbon dioxide gas may be used instead of superheated steam.

FIG. 3 is an explanatory diagram for explaining advance preparation for gas or rare metal recovery in the resource recovery system according to Embodiment 1 of the present invention.
As shown in FIG. 3, the resource recovery system according to the first embodiment includes a discard mechanism 87 and a discard path 88. The disposal mechanism 87 transfers the waste mud of the upper formation 40 excavated by a drilling mechanism (not shown) until reaching the gas hydrate layer or the rare metal layer 44 into the sea (above the sea bottom). Further, the disposal path 88 is already connected to the inside of the adjacent hollow pile 50C from which the gas hydrate or rare metal has been recovered. The disposal mechanism 87 discards the transferred waste mud into the hollow pile 50 </ b> C through the disposal path 88.

In principle, the disposal mechanism 87 may have any configuration as long as the waste mud can be disposed inside the hollow pile 50C through the disposal path 88, and the disposal path 88 is adjacent to the resource that has already been recovered. Any material can be used as long as it communicates with the inside of the hollow pile 50C and can discard the waste mud into the inside of the adjacent hollow pile 50C. The disposal mechanism 87, for example, may be one to transfer the waste mud by screw blades or the like, also, the drilling mechanism 38 described above, heat energy generating device 48, the tip portion of the high-pressure liquid feed pipe 15, and the recovery pipe 16 tip The waste mud agitated by the excavation mechanism 38 (stirring device) is made into a waste mud with high-temperature / high-pressure water or high-temperature / high-pressure liquid gas fed by a high-pressure feed pipe, and the waste mud is collected into a recovery pipe 16 may be collected.
In general, it is considered that there is no significant difference in the depth and thickness of the gas hydrate layer or the rare metal layer between the adjacent hollow pile 50A and the hollow pile 50C. Can be disposed inside the adjacent hollow pile 50C.

4 is a plan view of the pile driving device of the resource recovery system according to Embodiment 1 of the present invention, and FIG. 5 is a side view of the pile driving device shown in FIG. 4 at the time of pile driving.
The pile driving device 90 includes a main body support portion 92 and a pile gripping portion 94. The main body support portion 92 includes a first leg portion 93A and a second leg portion 93B. Two arm portions 95 are provided.
The main body support portion 92 is used as a scaffold for the pile driving device 90 by fitting at least one of the first leg portion 93A and the second leg portion 93B to the hollow pile 50 that has already been piled, and the pile driving device 90 is used as the seabed. Secure to.

The pile gripping portion 94 widens the distance between the two arm portions 95, and opens the two arm portions 95 at an angle or opens the two arm portions 95 according to the size of the hollow pile 50. a hollow pile 50 for piling by closing at an angle to grasp, as a scaffold at least one of the first leg portion 93A and the second leg portion 93 B of the main body support portion 92, pile gripper 94, the vertical The gripped hollow pile 50 is press-fitted into the seabed 40.
In addition, as above-mentioned, the pile holding part 94 can respond | correspond to the hollow pile of various thickness by changing the space | interval and opening-and-closing angle of the pile holding part 94 according to the magnitude | size of the hollow pile 50. FIG.

  The pile driving device 90 also serves as a sealing switching device that seals the hollow pile 50 with the lid 51 and installs the resource recovery device 46 inside the hollow pile 50. When the above-described resource recovery is completed in the hollow pile 50, the sealing switching device switches the resource recovery device 46 from the hollow pile 50 in which resource recovery has been performed to another hollow pile 50 in which resource recovery has not been performed. . The sealing of the hollow pile 50 by the lid 51 and the installation of the resource recovery device 46 are performed by the above-described pile gripping portion 94.

Next, a pile driving operation of the pile driving apparatus of the resource recovery system according to Embodiment 1 of the present invention will be described.
FIG. 6 is an explanatory diagram for explaining a pile driving procedure of the pile driving apparatus 90 according to the resource recovery system. In the pile driving device 90 shown in FIGS. 4 and 5, the main body support portion 92 includes two legs, a first leg 93 </ b> A and a second leg 93 </ b> B, and each leg fits into the hollow pile 50. Then, the scaffolding is formed and the main body support portion 92 is fixed to the seabed 40, but the leg portions that are already piled and fitted into the hollow pile 50 buried in the seabed to fix the main body support portion 92 to the seabed 40. May be one.
For example, the first leg 93 </ b> A of the main body support portion 92 is fitted with the hollow pile 50 shown in the position A and the hollow pile 50 shown in the position A is used as a scaffold, and other hollow piles 50 shown in the position A are placed around the hollow pile 50 shown in the position A. If hollow piles 50 are not staked, piling device 90, for example, the position from position 1 6 (position 1 to position 5: 2.0 line portion, position 6: solid line) to sequentially hollow pile 50 pile Strike.

After finishing the hollow pile 50 from the position 1 to the position 6 around the hollow pile 50 shown in the position A, the pile driving device 90, for example, moves the scaffold from the hollow pile 50 in the position A to the hollow in the position B (position 6). Change to pile 50. For example, the second leg portion 93B of the main body support portion 92 that is not fitted to the hollow pile 50 is fitted to the hollow pile 50 at the position B, and the first leg portion 93A of the main body support portion 92 is hollow at the position A. By removing from the pile 50, the scaffolding of the main body support portion 92 moves from the hollow pile 50 at the position A to the hollow pile 50 at the position B.
Then, the pile driving device 90 sequentially piles the hollow pile 50 around the hollow pile 50 at the position B from the position 7 where the pile is not piled up to the position 9 (one-dot chain line portion). After finishing the pile driving around the hollow pile 50 at the position B, the scaffolding of the main body support portion 92 is changed from the position B to the hollow pile 50 other than the position A in the same manner as described above. The hollow pile 50 is piled up.

Moreover, as described above, the pile driving device 90 also serves as a sealing switching device. After pile driving the hollow pile 50, the hollow pile 50 is sealed by the lid 51, and the resource recovery device 46 is placed in the hollow pile 50. Is installed. Moreover, installation of the resource collection | recovery apparatus 46 is switched by the pile holding | grip part 94 from the hollow pile 50 after resource collection to the hollow pile 50 before piled resource collection.

  The resource recovery system according to Embodiment 1 of the present invention includes the pile driving device 90, and as described above, the hollow piles 50 are sequentially piled on the seabed 40, and the resources are collected by sequentially collecting the resources. It is possible to dispose of the earth and sand of 40 seabeds without raising to the sea level, and to efficiently recover the gas from the gas hydrate layer and the rare metal from the rare metal layer without using the mud of the seabed 40 as industrial waste. Can do.

Embodiment 2
FIG. 7A is an external view showing a resource recovery pipe of a resource recovery system according to Embodiment 2 of the present invention, and FIG. 7B is a cross-sectional view thereof.
As shown in FIGS. 7 (A) and 7 (B), the resource recovery pipe 100 is constituted by a tropical zone 101 spirally wound in the same direction and an insulating band 102 similarly spirally wound in the same direction. The holes 103 are provided at regular intervals.

The tropical zone 101 is configured by including a heat generating member that generates heat by passing a direct current or an alternating current. Examples of the heat generating member include various known metal members and carbon members.
The insulating band 102 is made of an insulating material and prevents leakage of current between the tropics 101, and holes 103 are formed in the insulating band 102 at regular intervals.

The resource recovery pipe 100 is supplied with an electric current through the tropical zone 101 and supplies water, liquid gas, or a mixture thereof while heating, and also supplies gas from the gas hydrate layer, rare metal layer, or shale layer. It is used when recovering mud mixed with rare metals while heating. As the liquid gas, liquefied petroleum gas, liquefied carbon dioxide gas or the like is used.
Further, the hole 103 discharges the high-temperature and high-pressure water, liquid gas, or a mixture thereof, which is fed by the resource recovery pipe 100 and heated by the tropical zone 101, to the gas hydrate layer or the rare metal layer. In the case of recovery of shale gas from the shale layer, gel or the like used for hydraulic fracturing is discharged to the shale layer. Moreover, although the hole 103 is formed in the insulating band 102, it may be formed in the tropical zone 101.
The resource recovery pipe 100 is provided with the tropical zone 101 to prevent freezing of high-temperature and high-pressure water, liquid gas, or a mixture thereof at the time of liquid feeding, and also prevents freezing of the recovered resources at the time of resource recovery.

Embodiment 3
FIG. 8 is a cross-sectional view showing a resource recovery pipe according to Embodiment 3 of the present invention.
As shown in FIG. 8, the resource recovery pipe 110 has a double-pipe structure including an outer liquid supply pipe 110A and an inner recovery pipe 110B. The outer liquid supply pipe 110A has the same configuration as the resource recovery pipe 100 according to the second embodiment, and the insulating layer wound in the same direction as the tropics 111 wound in the same direction. The insulating band 112 has a hole 113. Further, the inner collection pipe 110B is formed of a known pipe material that does not have a structure such as a tropical zone.
The resource recovery pipe 110 carries out liquid feeding by the outer liquid feeding pipe 110A, and high-temperature and high-pressure water heated by the tropical zone 111 of the outer liquid feeding pipe 110A from the hole 103 provided in the outer liquid feeding pipe 110A. , Liquid gas, or a mixture thereof is discharged into the gas hydrate layer or the rare metal layer. In the case of recovery of shale gas from the shale layer, gel or the like used for hydraulic fracturing is discharged to the shale layer.
Further, the inner recovery pipe 110B performs gas recovery from the gas hydrate layer, rare metal recovery from the rare metal layer, and shale gas recovery from the shale layer.

Embodiment 4
FIG. 9 is a sectional view showing a resource recovery pipe according to Embodiment 4 of the present invention.
As shown in FIG. 9, the resource recovery pipe 120 has a double-pipe structure composed of an outer liquid feed pipe 120A and an inner recovery pipe 120B. The outer liquid feeding pipe 120A is a hollow pipe in which holes 123 are formed at regular intervals. Further, the inner recovery pipe 120B has a configuration similar to that of the resource recovery pipe 100 according to Embodiment 2, and includes a tropical region 121 and an insulating band 122 formed in a spiral shape.

Similarly to the resource recovery pipe 110 of the third embodiment, the resource recovery pipe 120 supplies liquid by the outer liquid supply pipe 120A, and the inner recovery pipe 120B from the hole 123 provided in the outer liquid supply pipe 120A. The high-temperature and high-pressure water, liquid gas, or mixture thereof heated by the tropical zone 121 is discharged to the gas hydrate layer or the rare metal layer. In the case of recovery of shale gas from the shale layer, gel or the like used for hydraulic fracturing is discharged to the shale layer.
The inner recovery pipe 120B performs gas recovery from the gas hydrate layer, rare metal recovery from the rare metal layer, and shale gas recovery from the shale layer.

Embodiment 5
FIG. 10 is a cross-sectional view showing a resource recovery pipe according to Embodiment 5 of the present invention.
As shown in FIG. 10, the resource recovery pipe 130 has a double-pipe structure including an outer liquid supply pipe 130A and an inner recovery pipe 130B. As in the second embodiment, the outer liquid supply pipe 130A and the inner recovery pipe 130B are formed from the tropical zones 131A and 131B that are spirally wound in the same direction and the insulation band 132A that is also spirally wound in the same direction. 132B. Further, the outer liquid feeding pipe 130A includes holes 133 formed at regular intervals in the insulating band 132A.
Similarly to the resource recovery pipe 110 of the third embodiment, the resource recovery pipe 130 supplies liquid by the outer liquid supply pipe 130A, and the outer recovery pipe 130A is provided from the hole 133 provided in the outer liquid supply pipe 130A. The high-temperature and high-pressure water, liquid gas, or a mixture thereof heated by the tropical zone 131A and the tropical zone 131B of the inner collection pipe 130B is discharged to the gas hydrate layer or the rare metal layer. In the case of recovery of shale gas from the shale layer, gel or the like used for hydraulic fracturing is discharged to the shale layer.
The inner recovery pipe 130B performs gas recovery from the gas hydrate layer, rare metal recovery from the rare metal layer, and shale gas recovery from the shale layer.

Embodiment 6
In addition, the tropical zones 101 , 111, 121, 131A, 131B and the insulating bands 102 , 112, 122, 132A, 132B in the second to fifth embodiments each have a structure wound in a spiral shape in the same direction. In this way, a resource recovery pipe is formed, but multiple tropics are provided, and an insulation band is provided for each tropics, thereby forming a multiple spiral structure wound in the same direction. You can also. For example, the resource recovery pipe may be constituted by three independent tropical zones.
FIG. 11 is an external view of a resource recovery pipe according to Embodiment 6 of the present invention. As shown in FIG. 11, the resource recovery pipe 140 includes a first insulation formed between each of the first tropics 141A, the second tropics 141B, and the third tropics 141C. The band 142A, the second insulating band 142B, and the third insulating band 142C are included. The first insulating band 142A is provided with a first hole 143A, the second insulating band 142B is provided with a second hole 143B, and the third insulating band 142C is provided with a third hole. Part 143C is installed.
Note that the multiple helical structure of the present embodiment can be applied to the resource recovery pipes of the second to fifth embodiments.

Embodiment 7
Further , the tropical zones 101 , 111, 121, 131A, 131B, 141A, 141B, and 141C in the second to sixth embodiments are the insulating bands 102 , 112, 122, 132A, 132B, 142A, 142B, 142C, and 142, respectively. However, if current leakage from the tropical zone is sufficiently suppressed, the resource recovery pipe may be configured only by the tropical zone without providing an insulating band.
FIG. 12 is an external view of a resource recovery pipe according to Embodiment 7 of the present invention. As shown in FIG. 12, the resource recovery pipe 150 is configured by spirally winding and joining one tropical zone 151. In addition, a plurality of holes 153 are provided on the tropical zone 151. In addition, the structure which does not provide the insulating band of this embodiment can be applied to the resource recovery pipes of the second to sixth embodiments.

The resource recovery system according to the second to seventh embodiments of the present invention includes the above-described resource recovery pipes 100 , 110, 120, 130, 140, and 150, so that water, liquid gas, or these used for resource recovery are provided. Since the mixed liquid is fed while being constantly heated, and the mud liquid that is the collected resource is collected while being constantly heated, the mixed liquid to be fed or the collected mud liquid is frozen in the middle and the resource collecting pipe 100 is recovered. 110, 120, 130, 140 and 150 are not clogged and the flow of the flowing liquid does not deteriorate, so that resource recovery can be performed efficiently.
In order to reduce power consumption during heating, these resource recovery pipes may be intermittently heated at predetermined intervals, and when the inside of these resource recovery pipes is frozen and clogged, You may control. Clogging due to freezing inside the resource recovery pipe can be determined by measuring the recovery amount of the recovered resource per unit time and the pressure inside the resource recovery pipe at the time of recovery.
Further, the above-described resource recovery pipe is provided with a storage battery such as a lithium storage battery (not shown) at regular intervals, and is configured so as to obtain a calorific value sufficient to heat the inside of the resource recovery pipe by the above-described tropical rain. In addition, the resource recovery pipe may include the above-described thermal power generation apparatus at regular intervals instead of a storage battery such as a lithium storage battery. By providing the thermal power generation device, sufficient power can be secured.

Embodiment 8
In the second to seventh embodiments, the resource recovery pipe or the like is heated by passing an electric current in the tropical region. However, induction heating may be used when the resource recovery pipe or the like is heated.
13A and 13B are external views of the resource recovery pipe according to the eighth embodiment of the present invention. As shown in FIG. 13A, the resource recovery pipe 160 is provided with a heated member 161 on the inner side, and an induction part 162 is provided near the heated member 161 on the outer side. The member to be heated 161 is configured by a member having a high electric resistance, and the induction unit 162 is connected to the AC power source 163, and a predetermined AC current is passed from the AC power source 163 to the induction unit 162 to induce the heating of the member to be heated 161 To do.

  Further, as shown in FIG. 13B, the resource recovery pipe 160 itself may be configured by a heated member 164. There is no need to install the heated member 161 in the resource recovery pipe 160, and if the induction unit 162 is installed, induction heating can be performed at any location of the resource recovery pipe 160.

Embodiment 9
FIG. 14 is a cross-sectional view showing an excavation mechanism installed at the tip of the resource recovery system according to Embodiment 9 of the present invention.
The excavating mechanism 200 includes an outer pipe 201 that is a resource recovery pipe and a liquid feeding pipe, an inner pipe 202 that is a resource recovery pipe and a recovery pipe, a rotary pipe 203 installed in the inner pipe 202, and a rotary pipe 203. Is installed at the tip of the rotary tube 203 , a turbine 205 installed around the shaft 204, a return portion 205 that changes the flow path direction toward the turbine 204, an inner tube 202 and a rotary tube 203. The cutter head 207 is provided.

The outer tube 201 and the inner tube 202 are, for example, tip portions of the resource recovery tubes 100 , 110, 120, 130, 140 , 150, and 160 according to the above-described second to eighth embodiments. , 110, 120, 130, 140 , 150 and 160 . The outer pipe 201 includes a return portion 205 that reverses the flowing liquid flowing in the direction of the cutter head 207 between the outer pipe 202 and the turbine 204 installed between the inner pipe 202 and the rotary pipe 203.
The inner tube 202 forms a venturi portion 206 together with the rotating tube 203, and decompresses the proximal end side of the rotating tube 203 by the venturi effect caused by the flowing liquid flowing in the proximal direction through the turbine 204.

The rotary tube 203 is fixed to the cutter head 207 at the distal end side, is provided with a turbine 204 between the distal end side of the inner tube 202 and the inner tube 202, and is disposed behind the cutter head 207 and is disposed on the outer tube. An outer flow path wall 211 forming an outer flow path 210 is provided between 201 and the rotary tube 203. The rotary tube 203 includes a plurality of communication holes 212 that communicate with the outer flow path 210 .

The turbine 204 is installed integrally with the rotary tube 203, rotated by the flowing liquid reversed by the return portion 205 of the outer tube 201, rotates the rotary tube 203, and rotates the cutter head 207 fixed to the rotary tube 203. .
The return portion 205 extends from the inner peripheral surface of the outer tube 201 along the outer peripheral surface of the rotating tube, and reverses the liquid flow flowing in the distal direction to the turbine 204 installed between the inner tube 202 and the rotating tube 203. .

The venturi portion 206 is configured by an inner peripheral surface of a thinned portion of the inner tube 202 and an outer peripheral surface of the rotating tube 203, and the proximal end side of the rotating tube 203 is depressurized by flowing liquid in the proximal direction. Then, mud containing hydrate gas or rare metal is sucked in the proximal direction from the rotary tube 203 as a recovery resource.
The cutter head 207 includes a plurality of cutter bits (not shown) on the contact surface side in contact with the formation or rock, and is rotated by the rotation of the rotary tube 203, and the formation or rock in contact with the contact surface of the cutter head 207 by the cutter bit. Drilling etc. The cutter head 207 includes a central hole 208 that communicates with the rotary tube 203 and a plurality of peripheral holes 209 that are formed around the central hole and communicate with the outer flow path 210.

The outer channel 210 is formed by the inner peripheral surface at the tip of the outer tube 201 and the outer channel wall 211 installed in the rotary tube 203, and includes gas or rare metal recovered through the peripheral hole 209 of the cutter head 207. Collect the mud as a recovery resource.
The outer flow path wall 211 may be installed on the rotary tube 203 and may rotate with the rotary tube 203 or may be separated from the rotary tube 203.
The communication hole 212 is installed in the rotary tube 203 and communicates the outer flow path 210 and the inside of the rotary tube 203. A plurality of communication holes 212 are provided to such an extent that the strength of the rotary tube 203 is not significantly reduced.

Next, the excavation operation and the resource recovery operation by the excavation mechanism of the resource recovery system according to the ninth embodiment of the present invention will be described.
High-temperature and high-pressure water, liquid gas, or a mixture thereof is sent between the outer pipe 201 and the inner pipe 202 of the resource recovery pipe 200, and the flow direction of the liquid is changed by the return portion 205 of the outer pipe 201. It is reversed and flows toward the turbine 204 installed between the inner pipe 202 and the rotary pipe 203.

The high-temperature and high-pressure water, liquid gas, or a mixture thereof, whose flow direction has been reversed, rotates the turbine 204, passes through the turbine 204, and is formed between the inner pipe 202 and the rotary pipe 203. 206.
When the turbine 204 is rotated by the flowing liquid, the cutter head 207 connected by the turbine 204 and the rotary tube 203 is rotated, and a plurality of cutter bits (not shown) installed on the contact surface of the cutter head 207 causes a formation or a bedrock. Is excavated.

Further, in the venturi section 206, the flow velocity is increased by restricting the flow of the flowing liquid, so that the pressure on the proximal end side of the rotary tube 203 is reduced by the venturi effect. When the pressure on the proximal end side of the rotary tube 203 is reduced, the central hole 208 and the peripheral hole 209 provided in the cutter head 207 suck in the mud containing gas or rare metal, and the outer flow path 210 and the communication hole 212. , And through the rotary tube 203, the inner pipe 202 collects the mud as a collection resource.
Since the resource recovery system according to Embodiment 9 of the present invention includes the excavation mechanism 200 described above, the resource recovery can be performed simultaneously with the excavation of the formation or the rock, so that the resource recovery can be performed efficiently. Can do.

Embodiment 10
When recovering shale gas from the shale layer, a plurality of cracks are provided in the well by hydraulic fracturing, but in order to further expand the provided cracks, a gel having an expanding action is often used.
As shown in FIG. 15 (A), the resource recovery system according to Embodiment 10 of the present invention uses the first cement particles 220 obtained by firing the outside of the particles using microwaves, as shown in FIG. Alternatively, as shown in FIG. 15B, second cement particles 230 obtained by firing the center of the particles using a microwave can be used.

The first cement particles 220 are composed of an outer portion 221 hardened and hardened by microwaves and an inner portion 222 not fired by microwaves, and the second cement particles 230 are not fired by microwaves. It consists of an outer part 231 and an inner part 232 fired by microwaves.
The hardened outer part 221 of the first cement particle 220 and the hardened inner part 232 of the second cement particle 230 expand by absorbing moisture, and a long time is required for hardening as a cement material. The inner part 222 of the first cement particle 220 and the outer part 231 of the second cement particle 230 absorb moisture and expand, and harden as a cement material in a relatively short time.

If the first cement particle 220 or the second cement particle 230 is used instead of the gel described above, the cement particles that have entered the cracks of the well expand to expand the cracks, and the cement particles solidify. As a result, cracks can be reinforced, and fault slipping and the like associated with shale gas recovery can be prevented.
Also, in the firing of cement particles using microwaves, the balance between the hardened portion and the non-hardened portion can be adjusted by adjusting the firing time, and the time until the cement particles solidify is adjusted. be able to.
Since cement particles containing water generate heat, the resource recovery pipe, the methane hydrate layer, and the like can be heated, and the power consumption in the entire resource recovery system can be reduced.

Embodiment 11
The pile driving device described in the above-described first embodiment grips a hollow pile from the outside, but may perform the pile driving by fixing the hollow pile from the inside. FIG. 16 is an explanatory diagram showing the overall configuration of the pile driving device of the resource recovery system according to Embodiment 11 of the present invention.
As shown in FIG. 16, the pile driving device 301 according to the eleventh embodiment of the present invention includes an outer hollow pile 302, an inner hollow pile 303, a cylinder 304, an outer pile driving portion 305, an inner pile driving portion 306, an inclination sensor 307, and A pile driving control unit 308 is provided.

The outer hollow pile 302 has the same configuration as the hollow pile 50 described above, and the outer hollow pile 302 can be sequentially connected to the upper side thereof.
Moreover, the inner side hollow pile 303 is arrange | positioned inside the outer side hollow pile 302, and is equipped with the structure similar to the above-mentioned hollow pile 50 except the diameter smaller than the outer side hollow pile 302. FIG.

  The cylinder 304 is, for example, a hydraulic cylinder, and includes a rod 314 and a rod case 324 that holds the rod 314. The outer pile driving portion 305 is fixed to the rod case 324, and the inner pile driving portion 306 is fixed to the rod 314. Then, when the rod 314 moves relative to the rod case 324, the outer pile driving portion 305 and the inner pile driving portion 306 are relatively moved.

  The outer pile driving portion 305 includes a motor 315, a bearing 325, and a hollow pile fixing portion 335. The motor 315 is, for example, a hydraulic motor, and is connected to a planetary gear or the like. The bearing 325 is fixed to the rod case 324 and rotatably fixes the cylinder 304 and the hollow pile fixing portion 335. Any bearing that can withstand the torque that rotates the outer hollow pile 302 is used. There may be. The hollow pile fixing portion 335 is for fixing the outer hollow pile 302 to the bearing 325 and preferably seals the inside of the outer hollow pile 302 piled on the seabed 40.

  The inner pile driving portion 306 includes a motor 316, a bearing 326, and a hollow pile fixing portion 336, similarly to the outer pile driving portion 305. The bearing 326 is fixed to the rod 314, and rotatably fixes the cylinder 304 and the hollow pile fixing portion 336. Any bearing that can withstand the torque that rotates the inner hollow pile 303 is used. May be. The hollow pile fixing part 336 fixes the inner hollow pile 303 to the bearing 326, and preferably seals the inner side of the inner hollow pile 303 piled on the seabed 40.

The inclination sensor 307 is configured by a gyro sensor or the like, detects how much the central axis of the pile driving device 301 is inclined with respect to the vertical direction, and sends the inclination of the central axis of the pile driving device 301 to the pile driving control unit 308. Output.
The pile driving control unit 308 controls the outer pile driving unit 305 and the inner pile driving unit 306 based on the inclination of the central axis of the pile driving device 301 from the inclination sensor 307, and the outer hollow pile 302 and the inner hollow pile 303. And the cylinder 304 is controlled to relatively move the outer hollow pile 302 and the inner hollow pile 303 in the vertical direction.

  In addition, the above-mentioned excavation mechanism 38 and the resource recovery device 46 can be installed inside the inner hollow pile 303, and the seabed (the above-mentioned formation) 40 is discarded as waste mud simultaneously with the pile driving or after the pile driving. In addition, gas hydrates and rare metals can be recovered.

Next, a pile driving operation of the pile driving device 301 will be described based on FIGS. 17 (A) to 17 (D). As shown in FIG. 17 (A), the pile driving device 301 arranged so that the lower ends of the outer hollow pile 302 and the inner hollow pile 303 are aligned is arranged on the seabed 40, and the outer pile driving portion is interposed via the pile driving control unit 308. The outer hollow pile 302 and the inner hollow pile 303 are rotated in different directions by controlling 305 and the inner pile driving portion 306, respectively.
As shown in FIG. 17B, by controlling the rotational speed of the outer hollow pile 302 and the inner hollow pile 303 based on the inclination detected by the inclination sensor 307, the outer hollow pile 302 and the inner hollow pile 303 Can be piled up vertically.

  After the outer hollow pile 302 and the inner hollow pile 303 are piled in a predetermined amount in the vertical direction, as shown in FIG. 17C, the pile driving control unit 308 stops the rotation of the outer hollow pile 302 and Using the hollow pile 302 as a reference, the inner hollow pile 303 is rotated by the cylinder 304 while the inner hollow pile 303 is rotated to pile the inner hollow pile 303.

Then, after the inner hollow pile 303 is piled up by a predetermined amount, as shown in FIG. 17D, the pile driving control unit 308 stops the rotation of the inner hollow pile 303, and the inner hollow pile 303 is used as a reference. While pressing the outer hollow pile 302 with the cylinder 304, the outer hollow pile 302 is rotated to pile the outer hollow pile 302, and the lower end of the outer hollow pile 302 and the lower end of the inner hollow pile 303 are aligned.
As described above, the outer hollow pile 302 and the inner hollow pile 303 are piled up by a predetermined amount, and then the inner hollow pile 303 and the outer hollow pile 302 are alternately piled up to form the outer hollow pile 302 and the inner hollow pile 303. It can be piled in the vertical direction and can be piled up quickly.

  In the gas recovery from the gas hydrate layer, in the resource recovery path including the resource recovery pipe, at least one conversion means for converting the recovered gas between the ground or the sea and the gas hydrate layer. It is preferable to have. Here, the gas conversion is, for example, a step of removing impurities in methane gas (actually, a mixed gas containing methane as a main component) obtained as a result of thermal decomposition of methane hydrate, or a step of removing moisture. Furthermore, although the process etc. which change methane gas to methanol by adding oxygen using a catalyst are used suitably, it is not limited to these.

  In addition, the combustible gas used in the above-described thermal power generation device 49 needs to be supplied from the outside at the beginning, but after the gas recovery from the gas hydrate gets on track, a part of the recovered gas is obtained. Can be changed to use. Similarly, the recovered gas can be used for the liquid gas used in resource recovery.

Further, the resource recovery device 46 described above includes a steam generator 58, a superheated steam generator 60 and a thermal energy generator 48 including a cylindrical member 61, a combustion chamber 74, a turbine 78, a rotating shaft 84, a rotor, and a stator. A thermal power generation device 49 including a generator is provided as a set, and it is preferable that a plurality of resource recovery devices 46 are provided at appropriate intervals along the gas hydrate layer. By installing a plurality in this way, gas recovery at a plurality of locations is performed by one resource recovery system 10, and a larger amount of gas can be recovered efficiently.
Similarly, with regard to the rare metal recovery from the rare metal layer, by installing a plurality of resource recovery devices 46 along the rare metal layer, a single resource recovery system 10 can recover a plurality of rare metals. It is possible to efficiently recover rare metals.

A plurality of units including the thermal energy generator 48 and the thermal power generator 49 may be provided at predetermined intervals in the circumferential direction of the outer cylinder 12 at the same position on the axis of the resource recovery system 10. In this case, it is preferable that the combustion gas supply pipe and the water supply pipe inside the unit can be used independently for each unit.
By providing the above-described configuration, the surrounding gas hydrate can be efficiently decomposed without complicating the configuration of the resource recovery system 10.

In addition, the cutter head 207 according to the eighth embodiment rotates only in one direction. For example, the cutter head may be divided into a plurality of annular portions, and each may rotate alternately in different directions. Good. For example, when the cutter head is divided into a first cutter head at the center portion and a second cutter head at the outer peripheral portion thereof, the first cutter head rotates clockwise and the second cutter head is left You may rotate around.
Further, the excavation mechanism may not be excavated in the vertical direction, but may be installed horizontally with respect to the gas hydrate layer or the like and excavate the gas hydrate layer or the like in the horizontal direction.

Further, in the resource recovery system according to Embodiment 1 of the present invention, waste mud is already discarded inside the hollow pile from which gas hydrate or rare metal has been recovered. At this time, cement particles are mixed into the waste mud. In addition, solidification of the waste mud inside the hollow pile may prevent leakage of harmful substances such as arsenic contained in the waste mud. Further, only the upper part of the hollow pile from which the waste mud has been discarded may be solidified with cement particles to form a lid, and the leakage of harmful substances may be prevented in the same manner as described above.
In the resource recovery system according to Embodiment 1, the excavated waste mud is discarded inside the hollow pile from which the gas hydrate or rare metal has been recovered. For example, the hollow pile is a double pipe, Either the part or the outer peripheral part may be excavated, the waste mud in the central part may be discarded in the outer peripheral part, and the waste mud in the outer peripheral part may be discarded in the central part.

  The resource recovery system according to the present invention further includes a fuel cell, and uses a methane gas recovered from the methane hydrate, a hydrogen gas ejected from the seabed, a hydrogen sulfide gas, a hot water ejected from the seabed, or the like. It is also possible to perform power generation according to and supply the generated power to each part of the resource recovery system.

  Moreover, although the heating apparatus which consists of a to-be-heated member and induction | guidance | derivation part as described in Embodiment 8 of this invention is installed in a resource recovery pipe, the resource recovery pipe is heated by induction-heating a to-be-heated member. For example, the above-described heating device is installed in a drilling device or the like at the tip of the resource recovery system, and the drilling is performed while melting the methane hydrate layer or the rare metal layer under low temperature and high pressure. Also good.

  The resource recovery system of the present invention has been described in detail above. However, the present invention is not limited to the above embodiment, and various improvements and modifications may be made without departing from the gist of the present invention. .

DESCRIPTION OF SYMBOLS 10 Resource recovery system, 11 Multiple pipe, 12 Outer cylinder, 14 Inner cylinder, 15, High pressure liquid supply pipe 16 Resource recovery pipe, 18 Supply pipe, 20 Signal line, 22 Conduction path, 24 Sea surface, 26 Structure, 28 Combustible gas Supply device, 30 air supply device, 32 control device, 35 water supply device, 36 gas tank, 38 excavation mechanism, 40 seabed, 42 strata, 44 gas hydrate layer or rare metal layer, 46 resource recovery device, 48 thermal energy generator, 49 thermal power generation equipment, 50 hollow pile, 52 first pipe, 54 second pipe, 56 water supply pipe, 58 steam generator, 60 superheated steam generator, 61 cylindrical member, 62 heater, 64 steam supply pipe, 66 High-frequency heating device, 67 filter, 68 gas recovery port, 70 combustible gas supply pipe, 72 air supply pipe, 74 combustion chamber, 76 burner, 78 Turbine 80 rotor, 82 a stator, 84 rotation shaft, 86 exhaust passage, 87 discard mechanism, 88 waste passage, 90, 301 piling apparatus, 92 main body support portion, the first leg 93A, 93B second leg, 94 Pile gripping part, 95 Arm part, 100 , 110, 120, 130, 140 , 150, 160 Resource recovery pipe, 101 , 111, 121, 131A, 131B, 141, 151 Tropic, 102 , 112, 122, 132A, 132B, 142 Insulation zone, 103 , 113, 123, 133 , 143, 153 Hole, 141A First tropical zone, 141B Second tropical zone, 141C Third tropical zone, 142A First tropical zone, 142B First Insulation band 2, 142 C third insulation band, 143 A first hole, 143 B second hole, 143 C third hole, 161 164 Heated member, 162 induction part, 163 AC power supply, 200 excavation mechanism, 201 outer pipe, 202 inner pipe, 203 rotating pipe, 204 turbine, 205 return part, 206 venturi part, 207 cutter head, 208 central hole, 209 Peripheral hole, 210 outer flow path, 211 outer flow path wall, 212 communication hole, 220 first cement particle, 221, 231 outer part, 222, 232 inner part, 230 second cement particle, 302 outer hollow pile, 303 Inner hollow pile, 304 cylinder, 305 Outer pile driving part, 306 Inner pile driving part, 307 Tilt sensor, 308 Pile driving control part, 314 Rod, 315, 316 Motor, 324 Rod case, 325, 326 Bearing, 335, 336 Hollow Pile fixing part.

Claims (24)

A pile driving device that sequentially drives hollow piles from the seabed toward the gas hydrate layer or the rare metal layer;
Disposal device that disposes the gas hydrate layer or the upper layer of the rare metal layer inside the hollow pile piled up as a waste mud and discards the gas adjacent to the hollow pile or the inside of the hollow pile after the rare metal recovery,
A stirring device for stirring the gas hydrate layer or the rare metal layer inside the hollow pile;
High pressure water or high pressure liquid gas is fed to the stirred gas hydrate layer or rare metal layer inside the hollow pile, and the gas hydrate layer or rare metal layer is used as recovered mud and recovered gas. Tube,
A recovery pipe for pumping the recovered mud liquid and the recovered gas to a predetermined storage section;
The said pile driving device is a resource recovery system characterized in that a hollow pile is piled sequentially around the hollow pile piled first.   The pile driving device, after finishing all the hollow piles around the hollow pile to be used as a reference, out of the plurality of hollow piles adjacent to the hollow pile to be used as a reference, The resource recovery system according to claim 1, wherein, as a reference, hollow piles are sequentially piled around the periphery.   The hollow pile before gas hydrate or rare metal recovery is sealed with a lid, and each of the disposal device, the stirring device, the high-pressure liquid feeding tube, and the recovery tube is installed after the gas hydrate or rare metal recovery. The resource recovery system according to claim 1, further comprising a sealing switching device that switches from the hollow pile to a hollow pile before gas hydrate or rare metal recovery.   The resource recovery system according to claim 3, wherein the pile driving device also serves as the sealing switching device. The high-pressure liquid feeding pipe further includes a heating device,
The heating device preliminarily heats high-pressure water or high-pressure liquid gas fed to the gas hydrate layer or rare metal layer inside the hollow pile to form high-temperature / high-pressure water or high-temperature / high-pressure liquid gas. The resource recovery system according to any one of claims 1 to 4, wherein the resource recovery system is characterized. The recovery tube further includes a heating device,
The resource recovery system according to any one of claims 1 to 5, wherein the heating device heats the recovered mud and the recovered gas so that the recovered mud does not freeze during recovery. .   The heating device includes: a heated member that is at least a part of the high-pressure liquid feeding pipe or at least a part of the recovery pipe; a heated member disposed in the high-pressure liquid feeding pipe or the recovery pipe; and the heated member The resource recovery system according to claim 5, wherein the heated member is induction-heated by the induction unit.   The heating device causes the high-pressure water, the high-pressure liquid gas, or the recovered mud to flow by passing an electric current through at least a part of the high-pressure liquid supply pipe or a carbon material or a metal material constituting at least a part of the recovery pipe. The resource recovery system according to claim 5 or 6, wherein the liquid is heated. The disposal device includes the stirring device, and the tip of the high-pressure liquid feeding tube and the tip of the recovery tube,
The stirrer stirs the waste mud of the upper layer inside the hollow pile,
The tip of the high-pressure liquid feeding pipe feeds the high-pressure water or high-pressure liquid gas to the agitated mud of the upper layer inside the agitated hollow pile, and the waste mud of the upper layer is used as a waste mud. ,
The tip of the recovery pipe pumps up the waste mud liquid from the hollow pile to a waste passage installed toward the gas hydrate adjacent to the hollow pile or the hollow pile after rare metal recovery. The resource recovery system according to any one of claims 8 to 9.   The said hollow pile is connectable sequentially in a longitudinal direction, The resource recovery system as described in any one of Claims 1-9 characterized by the above-mentioned.   The said storage part is installed in the mega float arrange | positioned on the sea surface, The resource recovery system as described in any one of Claims 1-10 characterized by the above-mentioned. A resource recovery system for recovering gas from a gas hydrate layer, recovering a rare metal from a rare metal layer, or recovering a gas from a shale layer,
High-pressure water or high-pressure liquid gas is sent to enable recovery of resources from the gas hydrate layer, rare metal layer, or shale layer, and equipped with a resource recovery pipe that pumps the recovered resources to a predetermined storage section.
The resource recovery pipe heats the high-pressure water to be fed or the high-pressure liquid gas to form high-temperature / high-pressure water or high-temperature / high-pressure liquid gas so that the recovery resource does not freeze in the middle of recovery. A resource recovery system, further comprising a heating device for heating the resource.   The heating apparatus includes a heated member that is at least a part of the resource recovery pipe or a heated member that is disposed in the resource recovery pipe, and an induction unit that is installed in the vicinity of the heated member, The resource recovery system according to claim 12, wherein the heated member is induction-heated by an induction unit.   The heating device heats the high-pressure water, the high-pressure liquid gas, or the recovered resource by passing an electric current through a carbon material or a metal material constituting at least a part of the resource recovery pipe. Item 13. The resource recovery system according to Item 12. The resource recovery pipe is a double pipe composed of a high-pressure liquid supply pipe for sending the high-pressure water or the high-pressure liquid gas and a recovery pipe for pumping the recovery resource to a predetermined storage section. The resource recovery system according to any one of claims 12 to 14.   The resource recovery system according to claim 15, wherein an outer side of the double pipe is the high-pressure liquid feeding pipe, and an inner side of the double pipe is the recovery pipe. It further comprises a drilling mechanism that drills while rotating the gas hydrate layer, rare metal layer, or shale layer at the tip,
The resource recovery system according to claim 16, wherein the rotation of the excavation mechanism uses a pressure difference due to a venturi effect between the high-pressure liquid feeding pipe and the recovery pipe as a power source. A resource recovery system for recovering gas from a gas hydrate layer, recovering a rare metal from a rare metal layer, or recovering a gas from a shale layer,
High-pressure water or high-pressure liquid gas is sent to enable recovery of resources from the gas hydrate layer, rare metal layer, or shale layer, and equipped with a resource recovery pipe that pumps the recovered resources to a predetermined storage section.
Cement powder is mixed inside the high-pressure water or the high-pressure liquid gas,
A resource recovery system, wherein the gas hydrate layer, the rare metal layer, or the shale layer is crushed with the high-pressure water or the high-pressure liquid gas mixed with the cement powder.   19. The resource recovery system according to claim 18, wherein the cement powder is obtained by firing inside or outside of the powder with microwaves.   The resource recovery pipe heats the high-pressure water to be fed or the high-pressure liquid gas to form high-temperature / high-pressure water or high-temperature / high-pressure liquid gas, so that the recovered resource does not freeze during recovery. The resource recovery system according to claim 18 or 19, further comprising a heating device for heating the recovered resource.   The resource recovery system according to any one of claims 1 to 20, wherein the liquid gas is liquefied petroleum gas or liquefied carbon dioxide gas. A pile driving device for driving a hollow pile from the seabed toward a gas hydrate layer or a rare metal layer;
A stirring device for stirring the gas hydrate layer or the rare metal layer inside the hollow pile, the gas hydrate layer or the rare metal layer;
High-pressure water or high-pressure liquid gas is sent to the upper layer, the gas hydrate layer or the rare metal layer inside the stirred hollow pile, the upper layer is used as a waste mud, and the gas hydrate layer or A high-pressure liquid supply pipe using the rare metal layer as recovered mud and recovered gas;
A recovery pipe for pumping the waste mud, the recovered mud and the recovered gas to a predetermined storage part;
The pile driving device includes an outer pile driving portion that piles an outer hollow pile, an inner pile driving portion that piles an inner hollow pile, and a cylinder that connects the outer pile driving portion and the inner pile driving portion. Have
The outer pile driving portion and the inner pile driving portion rotate the outer hollow pile and the inner hollow pile in different directions to pile the outer hollow pile and the inner hollow pile. Resource recovery system. An inclination sensor for detecting an inclination of a central axis of the pile driving device so that the outer hollow pile and the inner hollow pile are piled in a vertical direction;
A pile driving control unit for controlling the rotation speed of each of the outer hollow pile and the inner hollow pile so as to correct the inclination of the central axis of the pile driving device detected by the inclination sensor; The resource recovery system according to claim 22.   The pile driving control unit rotates the inner hollow pile while pressing the inner hollow pile with the cylinder in a state where the outer hollow pile is fixed, and piles the inner hollow pile, and the outer hollow pile is fixed in the state where the inner hollow pile is fixed. 24. The resource according to claim 23, wherein the outer pile driving unit, the inner pile driving unit, and the cylinder are respectively controlled so as to pile the outer hollow pile by pulling and rotating the hollow pile. Collection system.