Combined operation system using deep-sea mining plume mud as seabed drilling fluid

Abstract

The invention relates to the technical field of deep-sea mining, and discloses a combined operation system using deep-sea mining plume mud as seabed drilling fluid, which comprises a collection platform mounted on the sea level, a mining vehicle main body positioned on the seabed and used for collecting ores, and a drilling well formed in the seabed through a drilling pipe; the top of the mining vehicle body is fixedly connected with a plume protective cover through a supporting frame, a plurality of through holes communicating inside and outside are formed in the plume protective cover, and an ore collecting pipeline connected with a collecting platform is arranged on the mining vehicle body. According to the combined operation system using the deep-sea mining plume slurry as the seabed drilling fluid, the deep-sea mining vehicle protective cover is used, the overflow risk of the deep-sea mining plume is reduced, the plume is sealed in a control area through flocculation and exhausted mine field backfilling means, the marine environment cannot be affected, and the service life of the deep-sea mining plume slurry is prolonged. And the pollution risk of the operation system to the marine environment is further reduced through the recovery of the drilling fluid.

Description

Technical Field

[0001] The present invention relates to the technical field of deep sea mining, in particular to a joint operation system utilizing deep sea mining plume mud as seabed drilling fluid. Background Art

[0002] The technology for the development of deep-sea polymetallic nodules is becoming increasingly mature and is gradually moving towards the stage of large-scale commercial mining. At present, both the international and domestic communities attach great importance to the marine environmental pollution caused by deep-sea mining, especially the seabed plumes generated by underwater mining vehicles. Deep-sea sediments are thin and soft clay with very fine particles. The driving of mining vehicles and the collection of ore will destroy the original structure of the sediments, causing the sediment particles to suspend and form a diffuse plume. The plume will pollute the food source of deep-sea organisms, suffocate some filter-feeding organisms, and destroy the deep-sea ecosystem. Solving the plume problem is an important research topic for the commercialization of deep-sea mining.

[0003] At present, in addition to a large number of solid ores such as metal nodules in the deep sea, there are also rich gas or liquid mineral deposits deep in the seabed rock formations, including seabed hydrogen, oil, natural gas, etc. The exploitation of these minerals requires drilling inside the rock formations and collecting and transporting them to the surface through pipelines; however, the environmental pollution caused by deep-sea drilling and the risk of geological disasters caused by the depletion of mines cannot be ignored. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the present invention provides a joint operation system that uses deep-sea mining plume mud as seabed drilling fluid. By using a deep-sea mining vehicle protective cover, the risk of deep-sea mining plume spillage is reduced. By means of flocculation and backfilling of depleted ore fields, the plume is sealed in a controlled area, which will not affect the marine environment and has a promoting significance for the commercialization of deep-sea mining. Drilling fluid recovery further reduces the risk of pollution to the marine environment by the operation system, and solves the problem that in the existing deep-sea mining process, the plume will pollute the food source of deep-sea organisms, suffocate some filter-feeding organisms, and destroy the deep-sea ecosystem.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a combined operation system using deep-sea mining plume mud as seabed drilling fluid, comprising a collection platform installed on the sea level, a mining vehicle body located on the seabed for collecting ore, and a well opened on the seabed through a drill pipe;

[0008] The top of the mining vehicle body is fixedly connected with a plume protection cover through a support frame, and the plume protection cover is provided with a plurality of through holes communicating with the inside and outside, and the mining vehicle body is provided with an ore collection pipe connected with the collection platform;

[0009] The top of the well is connected to a collection pipeline installed on the developed ore field through a recovery pipe, and a pressure mud pump is installed on the recovery pipe;

[0010] The plume protection cover flocculates the turbid fluid inside it through a flocculation component, and discharges the flocculated fluid slurry into the well as drilling fluid.

[0011] Preferably, the flocculation assembly comprises a flocculation tank, which is connected to the interior of the plume protection hood via a flexible pipe, and a suction pump is installed on the flexible pipe.

[0012] Preferably, the flocculation mud outlet of the flocculation tank is connected to the inside of the drill pipe through a mud pipe, and a first control pump is installed on the mud pipe;

[0013] A second control pump is installed at the clarified water outlet of the flocculation tank.

[0014] Preferably, a flocculant storage tank is installed on the collection platform, and the flocculant storage tank is connected to the interior of the flocculation tank through a transmission pipeline, a pressure pump is installed on the transmission pipeline, and a stirring component is provided in the flocculation tank.

[0015] Preferably, the stirring assembly includes a protective cover fixed to the top of the flocculation tank and a hollow tube rotatably connected to the top of the flocculation tank, the bottom end of the hollow tube extends to the inside of the flocculation tank, and the outer surface of the bottom end of the hollow tube is fixedly connected to a plurality of stirring blades, and the interiors of the plurality of stirring blades are each provided with a diversion cavity, and the diversion cavity is communicated with the interior of the hollow tube;

[0016] The interior of the protective cover is fixedly connected with a driving member for rotating the hollow tube, the bottom end of the transmission pipe extends to the interior of the protective cover, and the bottom end of the transmission pipe is fixedly connected with a rotating sleeve, the rotating sleeve is rotatably connected to the hollow tube, and the rotating sleeve is communicated with the interior of the hollow tube.

[0017] Preferably, a filter plate is fixedly connected to the interior of the flocculation tank, and a plurality of stirring plates are located at the bottom of the filter plate;

[0018] A floating plate is slidably connected to one side of the inner wall of the flocculation tank, a liquid extraction nozzle is fixedly connected to the bottom of the floating plate, and the top of the liquid extraction nozzle is connected to the clarified water outlet through a telescopic hose.

[0019] Preferably, the bottom of the flocculation tank is configured to be concave, and a pressurizing component is provided at the bottom of the flocculation tank, the pressurizing component includes a pressurizing cylinder fixed to the bottom of the flocculation tank, the outer surface of the bottom of the pressurizing cylinder is fixedly connected to a plurality of extraction pipes, one ends of the plurality of extraction pipes are fixedly connected to the bottom of the flocculation tank, one end of the mud pipe is fixedly connected to the bottom of the pressurizing cylinder, the mud pipe and the plurality of extraction pipes are installed with one-way valves, and a pressurizing member is provided inside the pressurizing cylinder.

[0020] Preferably, the pressurizing member comprises a piston plate slidably connected to the inside of the pressurizing cylinder, and a U-shaped connecting frame is fixedly connected to the top of the piston plate;

[0021] The bottom end of the hollow tube extends to the interior of the pressurizing cylinder, and a reciprocating screw is fixedly connected to the bottom end of the hollow tube. The outer surface of the reciprocating screw is transmission-connected to the interior of the U-shaped connecting frame.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the present invention provides a combined operation system using deep-sea mining plume mud as seabed drilling fluid, which has the following beneficial effects:

[0024] 1. The present invention reduces the risk of deep-sea mining plume spillage by using a deep-sea mining vehicle protective cover, seals the plume in a controlled area by means of flocculation and backfilling of depleted ore fields, and does not affect the marine environment, which is of great significance for promoting the commercialization of deep-sea mining. The recovery of drilling fluid further reduces the risk of pollution of the marine environment by the operating system, and uses deep-sea plume mud as drilling fluid for seabed rock formations, using local materials, reducing pipeline transportation and overall operating system energy consumption, and backfilling the recovered drilling fluid into the depleted ore deposits to ensure the relative balance of rock formation pressure before and after mining, which can effectively reduce the risk of geological disasters caused by mineral development.

[0025] 2. The present invention, through the provision of a rotating sleeve, not only facilitates the injection of flocculants into the interior of the hollow tube through the transmission pipeline, but also does not affect the normal rotation of the hollow tube, and can evenly discharge the flocculants in the hollow tube through the diversion cavity inside the stirring plate, further improving the contact effect between the flocculants and the turbid fluid. The filter plate is provided to divide the interior of the flocculation tank into two cavities, which can not only filter the clarified water after flocculation treatment, thereby improving the purity of the clarified water, but also prevent the stirring force of the stirring plate from disturbing the clarified water in the upper layer during the rotating stirring process, thereby avoiding the problem of turbidity of the clarified water after treatment.

[0026] 3. The present invention can synchronously drive the reciprocating screw to rotate through the rotation of the hollow tube, and further drive the U-shaped connecting frame to reciprocate up and down. The up and down movement of the U-shaped connecting frame can drive the piston plate to move up and down to extract and pressurize the mud water. This not only avoids the blockage of the pipeline due to the high concentration of the mud water, affecting the normal flow of the mud water, but also fully utilizes the driving force of stirring and mixing, reduces the use of electric driving sources, and improves the functionality and practicality of the flocculation component. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 Schematic diagram of the flow of drilling fluid in the drill pipe and drilling well of the present invention;

[0029] Figure 3 For the present invention Figure 1 Schematic diagram of the structure of the medium flocculation tank;

[0030] Figure 4 For the present invention Figure 3 Bottom view of the structure of the middle flocculation tank;

[0031] Figure 5 For the present invention Figure 3 Structural cross-section view of the middle flocculation tank;

[0032] Figure 6 For the present invention Figure 5 Schematic diagram of the structure of the medium pressurized component.

[0033] In the figure: 1. Collection platform;

[0034] 2. Mining vehicle body; 21. Plume protection cover; 22. Through hole; 23. Ore collection pipe;

[0035] 3. Drill pipe; 4. Drilling; 5. Recovery pipe; 6. Collection pipeline; 7. Pressure mud pump;

[0036] 8. Flocculation assembly; 81. Flocculation tank; 811. Filter plate; 812. Floating plate; 813. Liquid extraction nozzle; 82. Flexible pipe; 83. Suction pump; 84. Mud pipe; 85. First control pump; 86. Second control pump;

[0037] 87, stirring assembly; 871, protective cover; 872, hollow tube; 873, stirring blade; 874, diversion chamber; 875, rotating sleeve; 876, driving member;

[0038] 88, pressurizing assembly; 881, pressurizing cylinder; 882, extraction tube; 883, piston plate; 884, U-shaped connecting frame; 885, reciprocating screw;

[0039] 9. Flocculant storage tank; 10. Transmission pipeline; 11. Pressure pump. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Embodiment 1:

[0042] Refer to the attached Figure 1 and Figure 2 , a joint operation system using deep-sea mining plume mud as seabed drilling fluid, including a collection platform 1 installed on the sea level, a mining vehicle body 2 located on the seabed for collecting ore, and a well 4 opened on the seabed through a drill pipe 3;

[0043] The top of the mining vehicle body 2 is fixedly connected with a plume protection cover 21 through a support frame, and the plume protection cover 21 is provided with a plurality of through holes 22 communicating with the inside and outside. The mining vehicle body 2 is provided with an ore collection pipe 23 connected with the collection platform 1;

[0044] The plume protection cover 21 is used to wrap the plume turbid fluid formed during the ore mining process to prevent it from spreading; the plume protection cover 21 is provided with a plurality of through holes 22 that are connected to the inside and outside, so that clean seawater can enter the plume protection cover 21 through the plurality of through holes 22 while sucking turbid seawater, so as to maintain the balance of internal and external pressures; a one-way valve can be provided in the through hole 22 to further prevent the plume turbid fluid in the cover from flowing out;

[0045] The top of the well 4 is connected to a collection pipeline 6 installed on the developed ore field through a recovery pipe 5, and a pressure mud pump 7 is installed on the recovery pipe 5;

[0046] The plume protection cover 21 flocculates the turbid fluid inside it through the flocculation assembly 8, and discharges the flocculated fluid slurry as drilling fluid into the well 4;

[0047] By collecting and flocculating the seafloor plumes generated during the mining of deep-sea polymetallic nodules, the plumes can be used as drilling fluids for the development of deep-sea hydrogen, oil, natural gas and other mineral deposits, and then the drilling fluids can be recycled and backfilled into depleted mineral fields. This can not only reduce the environmental impact of deep-sea mining and seafloor drilling, but also reduce the potential geological hazards caused by the depletion of seafloor mineral fields.

[0048] The use of deep-sea mining vehicle protective covers reduces the risk of deep-sea mining plume spills. Through flocculation and backfilling of depleted ore fields, the plumes are sealed in a controlled area without causing any impact on the marine environment, which is of great significance for promoting the commercialization of deep-sea mining. Drilling fluid recovery further reduces the risk of pollution to the marine environment caused by the operating system.

[0049] By using deep-sea plume mud as drilling fluid for seabed rock formations, local materials are used to reduce pipeline transportation and overall operating system energy consumption;

[0050] By backfilling the recovered drilling fluid into the depleted mineral deposits and ensuring the relative balance of rock pressure before and after mining, the risk of geological disasters caused by mineral development can be effectively reduced.

[0051] See attached Figure 1 , the flocculation assembly 8 includes a flocculation tank 81, the flocculation tank 81 is connected to the interior of the plume protection cover 21 through a flexible pipe 82, and a suction pump 83 is installed on the flexible pipe 82;

[0052] The suction pump 83 is provided to suck the turbid plume fluid formed inside the plume protection cover 21 through the flexible pipe 82 and discharge it into the flocculation tank 81 for flocculation treatment.

[0053] See attached Figure 1 and Figure 2 The flocculation mud outlet of the flocculation tank 81 is connected to the interior of the drill pipe 3 through a mud pipe 84, and a first control pump 85 is installed on the mud pipe 84;

[0054] The first control pump 85 is used to discharge the high-concentration plume mud formed by the flocculation treatment in the flocculation tank 81 into the drill pipe 3 through the mud pipe 84 to form the drilling fluid required for the drilling treatment. During the drilling process of the seabed rock formation, the high-concentration plume mud is used as the drilling fluid to carry and remove the rock debris cut by the rotating cutter head.

[0055] A second control pump 86 is installed at the clarified water outlet of the flocculation tank 81;

[0056] The second control pump 86 is provided to discharge the clarified water at the upper layer after flocculation treatment in the flocculation tank 81 .

[0057] See attached Figure 1 A flocculant storage tank 9 is installed on the collection platform 1, and the flocculant storage tank 9 is connected to the inside of the flocculation tank 81 through a transmission pipeline 10, a pressure pump 11 is installed on the transmission pipeline 10, and a stirring component 87 is provided in the flocculation tank 81;

[0058] The flocculant storage tank 9 is used to store the high-concentration flocculant solution required for flocculation treatment of the plume turbid fluid. The pressure pump 11 is used to control the flocculant solvent in the flocculant storage tank 9 to be transferred to the flocculation tank 81 on the seabed, and the flocculant is stirred and mixed by the stirring component 87 on the flocculation tank 81 to accelerate the flocculation effect.

[0059] The operation of the deep-sea polymetallic nodule mining vehicle causes the sediment particles to be suspended, forming a turbid plume, and the turbid fluid is sucked into the flocculation assembly 8 by the suction pump 83 on the plume protection cover 21;

[0060] The offshore operation platform adds high-concentration green flocculant into the flocculation tank 81 through a pipeline, and accelerates the plume flocculation and sedimentation to the bottom of the tank through mechanical stirring; the upper part of the clarified liquid is directly discharged into the seawater, and the lower high-concentration plume mud is used for drilling;

[0061] During the drilling process of submarine rock formations, high-concentration plume mud is used as drilling fluid to carry and remove rock debris cut by the rotating cutter head;

[0062] The drilling fluid is recovered after flowing back to the seabed and injected back into the rock formation through the existing wells in the depleted mine field to complete the plume collection and treatment.

[0063] Embodiment 2: Based on embodiment 1, the difference is that;

[0064] See attached Figures 2 to 6 The stirring assembly 87 includes a protective cover 871 fixed to the top of the flocculation tank 81 and a hollow tube 872 rotatably connected to the top of the flocculation tank 81. The bottom end of the hollow tube 872 extends to the inside of the flocculation tank 81. A plurality of stirring blades 873 are fixedly connected to the outer surface of the bottom end of the hollow tube 872. A plurality of stirring blades 873 are provided inside with a diversion cavity 874, and the diversion cavity 874 is communicated with the inside of the hollow tube 872.

[0065] A driving member 876 for rotating the hollow tube 872 is fixedly connected to the interior of the protective cover 871. The bottom end of the transmission pipeline 10 extends to the interior of the protective cover 871. A rotating sleeve 875 is fixedly connected to the bottom end of the transmission pipeline 10. The rotating sleeve 875 is rotationally connected to the hollow tube 872, and the rotating sleeve 875 is communicated with the interior of the hollow tube 872.

[0066] The driving member 876 adopts an electric driving mechanism in the prior art, including a motor, a reducer and two gears, and is used to drive the hollow tube 872 to rotate, so that the stirring blade 873 stirs and mixes the plume turbid fluid and the high-concentration green flocculant to improve the flocculation efficiency;

[0067] By setting the rotating sleeve 875, it is not only convenient for the transmission pipeline 10 to inject flocculant into the interior of the hollow tube 872, but also does not affect the normal rotation of the hollow tube 872. The flocculant inside the hollow tube 872 can be evenly discharged through the diversion cavity 874 inside the stirring blade 873, thereby further improving the contact effect between the flocculant and the turbid fluid and further increasing the flocculation strength.

[0068] A filter plate 811 is fixedly connected to the interior of the flocculation tank 81, and a plurality of stirring plates 873 are located at the bottom of the filter plate 811;

[0069] The filter plate 811 is provided to divide the interior of the flocculation tank 81 into two cavities, which can not only filter the clarified water after flocculation treatment to improve the purity of the clarified water, but also prevent the stirring blade 873 from disturbing the clarified water on the upper layer during the rotating stirring process, thereby avoiding the problem of the clarified water becoming turbid again after treatment;

[0070] A floating plate 812 is slidably connected to one side of the inner wall of the flocculation tank 81, a liquid extraction nozzle 813 is fixedly connected to the bottom of the floating plate 812, and the top of the liquid extraction nozzle 813 is connected to the clarified water outlet through a telescopic hose;

[0071] The clarified water is extracted and discharged through the liquid extraction nozzle 813. The floating plate 812 is arranged to float on the top of the clarified water. This not only facilitates the liquid extraction nozzle 813 to extract clarified water of different liquid levels, but also further avoids the extraction and diversion of liquid with incomplete flocculation by adopting the extraction and discharge work from top to bottom, thereby further improving the discharge effect of clarified water.

[0072] Embodiment 3: Based on embodiment 1, the difference is that;

[0073] See attached Figure 6 The bottom of the flocculation tank 81 is set to be concave, and a pressurizing component 88 is set at the bottom of the flocculation tank 81. The pressurizing component 88 includes a pressurizing cylinder 881 fixed to the bottom of the flocculation tank 81. The outer surface of the bottom of the pressurizing cylinder 881 is fixedly connected with a plurality of extraction pipes 882. One ends of the plurality of extraction pipes 882 are fixedly connected with the bottom of the flocculation tank 81. One end of the mud pipe 84 is fixedly connected with the bottom of the pressurizing cylinder 881. One-way valves are installed on the mud pipe 84 and the plurality of extraction pipes 882. A pressurizing member is set inside the pressurizing cylinder 881.

[0074] By setting the pressure member, not only can the muddy water flocculated at the bottom of the flocculation tank 81 be extracted through a plurality of extraction pipes 882, but the extracted muddy water can also be pressurized so that the muddy water can be quickly discharged through the mud pipe 84, thereby improving the smoothness of the muddy water discharge.

[0075] The pressurizing member includes a piston plate 883 slidably connected to the inside of the pressurizing cylinder 881, and a U-shaped connecting frame 884 is fixedly connected to the top of the piston plate 883;

[0076] The upward movement of the piston plate 883 can extract the high-concentration muddy water at the bottom of the flocculation tank 81 through the plurality of extraction pipes 882, and the downward movement of the piston plate 883 can squeeze the muddy water inside the pressurizing cylinder 881, so that the muddy water can be quickly discharged through the mud pipe 84, thereby improving the smoothness of the muddy water replenishment;

[0077] The bottom end of the hollow tube 872 extends to the inside of the pressurizing cylinder 881, and the bottom end of the hollow tube 872 is fixedly connected with a reciprocating screw 885, and the outer surface of the reciprocating screw 885 is transmission-connected to the inside of the U-shaped connecting frame 884;

[0078] Through the rotation of the hollow tube 872, the reciprocating screw 885 can be synchronously driven to rotate, and then the U-shaped connecting frame 884 can be driven to reciprocate up and down. Through the up and down movement of the U-shaped connecting frame 884, the piston plate 883 can be driven to move up and down to extract and pressurize the mud water. This not only avoids the blockage of the pipeline due to the high concentration of the mud water, affecting the normal flow of the mud water, but also fully utilizes the driving force of stirring and mixing, reduces the use of electric driving sources, and improves the functionality and practicality of the flocculation component 8.

[0079] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined operation system using deep sea mining plume mud as seabed drilling fluid, characterized in that: It comprises a collection platform (1) installed on the sea level, a mining vehicle body (2) located on the seabed for collecting ore, and a drilling well (4) opened on the seabed through a drilling pipe (3); The top of the mining vehicle body (2) is fixedly connected to a plume protection cover (21) via a support frame, the plume protection cover (21) is provided with a plurality of through holes (22) communicating with the inside and outside, and the mining vehicle body (2) is provided with an ore collection pipe (23) connected to the collection platform (1); The top of the drilling well (4) is connected to a collection pipeline (6) installed on the developed ore field through a recovery pipe (5), and a pressure mud pump (7) is installed on the recovery pipe (5); The plume protection cover (21) flocculates the turbid fluid inside it through a flocculation component (8), and discharges the flocculated fluid slurry as drilling fluid into the well (4).

2. The combined operation system using deep sea mining plume mud as seabed drilling fluid according to claim 1, characterized in that: The flocculation assembly (8) comprises a flocculation tank (81), wherein the flocculation tank (81) is connected to the interior of the plume protection cover (21) via a flexible pipe (82), and a suction pump (83) is installed on the flexible pipe (82).

3. The combined operation system using deep sea mining plume mud as seabed drilling fluid according to claim 2, characterized in that: The flocculation mud outlet of the flocculation tank (81) is connected to the interior of the drill pipe (3) through a mud pipe (84), and a first control pump (85) is installed on the mud pipe (84); A second control pump (86) is installed at the clarified water outlet of the flocculation tank (81).

4. The combined operation system using deep sea mining plume mud as seabed drilling fluid according to claim 3, characterized in that: A flocculant storage tank (9) is installed on the collection platform (1), and the flocculant storage tank (9) is connected to the interior of a flocculation tank (81) via a transmission pipeline (10), a pressure pump (11) is installed on the transmission pipeline (10), and a stirring component (87) is provided in the flocculation tank (81).

5. The combined operation system using deep sea mining plume mud as seabed drilling fluid according to claim 4, characterized in that: The stirring assembly (87) comprises a protective cover (871) fixed to the top of the flocculation tank (81) and a hollow tube (872) rotatably connected to the top of the flocculation tank (81), the bottom end of the hollow tube (872) extends to the interior of the flocculation tank (81), a plurality of stirring blades (873) are fixedly connected to the outer surface of the bottom end of the hollow tube (872), a plurality of stirring blades (873) are provided inside each of the plurality of stirring blades (873), and the diversion chambers (874) are communicated with the interior of the hollow tube (872); A driving member (876) for driving the hollow tube (872) to rotate is fixedly connected to the interior of the protective cover (871), the bottom end of the transmission pipe (10) extends to the interior of the protective cover (871), and a rotating sleeve (875) is fixedly connected to the bottom end of the transmission pipe (10), the rotating sleeve (875) is rotationally connected to the hollow tube (872), and the rotating sleeve (875) is communicated with the interior of the hollow tube (872).

6. The combined operation system using deep sea mining plume mud as seabed drilling fluid according to claim 5, characterized in that: A filter plate (811) is fixedly connected to the interior of the flocculation tank (81), and a plurality of stirring plates (873) are located at the bottom of the filter plate (811); A floating plate (812) is slidably connected to one side of the inner wall of the flocculation tank (81), a liquid extraction nozzle (813) is fixedly connected to the bottom of the floating plate (812), and the top of the liquid extraction nozzle (813) is connected to the clarified water outlet via a telescopic hose.

7. The combined operation system using deep sea mining plume mud as seabed drilling fluid according to claim 5, characterized in that: The bottom of the flocculation tank (81) is arranged to be concave, and a pressurizing assembly (88) is arranged at the bottom of the flocculation tank (81). The pressurizing assembly (88) comprises a pressurizing cylinder (881) fixed to the bottom of the flocculation tank (81). The outer surface of the bottom of the pressurizing cylinder (881) is fixedly connected with a plurality of extraction pipes (882). One ends of the plurality of extraction pipes (882) are fixedly connected with the bottom of the flocculation tank (81). One end of the mud pipe (84) is fixedly connected with the bottom of the pressurizing cylinder (881). One-way valves are installed on the mud pipe (84) and the plurality of extraction pipes (882). A pressurizing member is arranged inside the pressurizing cylinder (881).

8. The combined operation system using deep sea mining plume mud as seabed drilling fluid according to claim 7, characterized in that: The pressurizing member comprises a piston plate (883) slidably connected to the inside of the pressurizing cylinder (881), and a U-shaped connecting frame (884) is fixedly connected to the top of the piston plate (883); The bottom end of the hollow tube (872) extends to the interior of the pressurizing cylinder (881), and a reciprocating screw (885) is fixedly connected to the bottom end of the hollow tube (872), and the outer surface of the reciprocating screw (885) is transmission-connected to the interior of the U-shaped connecting frame (884).

Images