A seabed gas-water-solid multiphase fluid sampling device

Abstract

This invention discloses a seabed gas-water-solid multiphase fluid sampling device, comprising a surface unmanned surface vessel (USV) equipped with a pressure source connected to a gas supply pipe. A seabed sampling robot and the USV are connected via a sample transfer pipeline. The sample transfer pipeline includes a U-shaped sampling tube, a second gas supply pipe, and an umbilical cable. The second gas supply pipe is connected to the first gas supply pipe. The U-shaped sampling tube includes a control tube and a sample delivery tube, which are interconnected. A one-way valve is installed on the sample delivery tube. The control tube is connected to the first gas supply pipe. Control valves are installed on the first gas supply pipe, the control tube, the second gas supply pipe, and the sample delivery pipe, and these control valves are electrically connected to a controller. This device performs real-time disturbance and fluidization sampling of seabed sediments. During seabed silt sampling, it can disturb or directly sample deep silt. During sampling, the gas, water, and solid particles are simultaneously introduced, enabling low-cost monitoring of real-time seabed conditions in large survey areas.

Description

Technical Field

[0001] This invention relates to the field of seabed sample collection, and in particular to a seabed gas-water-solid multiphase fluid sampling device. Background Technology

[0002] Seafloor sediment contains rich geological, biological, and chemical information, making it an important subject for studying marine ecosystems, environmental change, and mineral resources. Effective seafloor sediment sampling techniques are crucial for obtaining high-quality samples. Currently, seafloor sediment sampling techniques mainly include two methods: marine drilling sampling and surface sampling. Drilling sampling involves using drilling equipment to drill in a designated marine area and extracting sediment samples to the surface for analysis. This method is suitable for deeper seafloors and can obtain relatively accurate sediment samples. However, drilling work is generally carried out at the sea surface, resulting in higher sampling costs and longer installation and dismantling times, making it unsuitable for sampling in large-scale seafloor survey areas. Surface sampling involves using buoys or remotely operated vehicles to lower a sampler to the seafloor surface to collect sediment samples. This method is suitable for shallow and nearshore areas and is relatively simple to operate. However, because it can only obtain surface samples, it may suffer from uneven vertical distribution of sediment. Therefore, existing seafloor sediment samplers cannot accurately sample seafloor sediment, especially deep sediment, in real time.

[0003] To address this issue, a subsea gas-water-solid multiphase fluid sampling device is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a seabed gas-water-solid multiphase fluid sampling device to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides a seabed gas-water-solid multiphase fluid sampling device, comprising:

[0006] The unmanned surface vessel is equipped with a pressure source, and the pressure source is connected to an air supply pipe.

[0007] A seabed sampling robot, which is connected to the surface unmanned vessel via a sample transfer pipeline;

[0008] The sample transfer pipeline includes a U-shaped sampling tube, a second gas supply tube, and an umbilical cable. The second gas supply tube is connected to the first gas supply tube. The U-shaped sampling tube includes a control tube and a sample delivery tube. The control tube and the sample delivery tube are interconnected. The control tube and the sample delivery tube are connected by an inlet tube. A one-way valve is installed on the inlet tube. The control tube is connected to the first gas supply tube. Control valves are installed on the first gas supply tube, the control tube, the second gas supply tube, and the sample delivery tube. The control valves are electrically connected to a controller. The controller is installed on the unmanned surface vessel.

[0009] The seabed sampling robot includes an upper sampling robot and a lower sampling robot. The gas supply pipe, the umbilical cable, and the sample inlet pipe are all connected to the lower sampling robot. The upper sampling robot is connected to the umbilical cable. A protective bracket is installed on the upper sampling robot, and a seabed disturbance device is installed on the protective bracket. A seabed fixing cable is fixedly connected to the bottom surface of the lower sampling robot, and a seabed fixing anchor is fixedly connected to the seabed fixing cable.

[0010] Preferably, the seabed disturbance device includes a disturbance controller, two fixed baffles are fixedly connected to the protective bracket, the disturbance controller is connected between the two fixed baffles, a movable shaft is installed on the disturbance controller, a movable arm is installed on the movable shaft, and a disturbance head is installed on the movable arm.

[0011] Preferably, the upper sampling robot includes a shell, a vertical thruster is installed on the top surface of the shell, a horizontal thruster is installed below the shell, a sampling connection tube is installed on the shell and is connected to the sample inlet tube, a fixed camera and an LED light are installed on the sampling connection tube, a movable camera is installed on the shell, and a protective bracket is fixedly connected to the shell.

[0012] Preferably, the lower sampling robot is fixedly connected to the outer shell, and the lower sampling robot is equipped with a dysprosium lamp, an underwater sensor and an underwater sampler. The sampling connection pipe is connected to the lower sampling robot, and the underwater sensor includes a water quality sensor and a temperature and pressure sensor.

[0013] Preferably, the underwater sampler includes an underwater sampling tube and a sampling filter tube, the underwater sampling tube being mounted on the lower sampling robot, and the sampling filter tube being mounted on the underwater sampling tube.

[0014] This invention discloses the following technical effects: The seabed gas-water-solid multiphase fluid sampling device of this invention, and the seabed silt sampling equipment can perform real-time disturbance and fluidization sampling of seabed sediments (water jet, gas boiling device, stirring, seawater stirring, sampling drill bit, etc.). During seabed silt sampling, it can disturb or directly sample deep silt. During sampling, the three phases of gas, water, solid and biological particles are simultaneously introduced. By analyzing the changes in the composition and content of each phase of the sample, the sedimentation state and composition changes of seabed silt can be understood in real time. The dynamics of seabed substances and seabed microorganisms, marine earthquakes, seabed leaks, etc. can be monitored in real time. Since the seabed sampling device is carried out on the seabed and can be moved and sampled in real time on the seabed, the real-time condition of the seabed in a large area of ​​survey area can be monitored at a low cost. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the seabed gas-water-solid multiphase fluid sampling device of the present invention.

[0017] Figure 2 This is a schematic diagram of the controller and control valve structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the sample transfer pipeline structure of the present invention;

[0019] Figure 4 This is a right view of the seabed sampling robot of the present invention;

[0020] Figure 5 This is a left view of the seabed sampling robot of the present invention;

[0021] Figure 6 This is a top view of the seabed sampling robot of the present invention;

[0022] Among them, 1. Unmanned surface vessel; 121. Control valve; 2. Sample transfer pipeline; 21. Umbilical cable; 22. Gas supply pipe II; 23. U-shaped sampling tube; 211. Control tube; 212. Sample delivery tube; 213. One-way valve; 214. Sample inlet tube; 3. Seabed sampling robot; 301. Sampling connection tube; 311. Vertical thruster; 312. Horizontal thruster; 321. Upper sampling robot; 322. Lower sampling robot; 323. Protective bracket; 324. Fixed baffle; 331. Fixed camera; 33 2. Movable camera; 341. LED light; 342. Dysprosium lamp; 35. Underwater sensor; 351. Water quality sensor; 352. Temperature and pressure sensor; 36. Underwater sampler; 36. Underwater sampler; 361. Underwater sampling tube; 362. Sampling filter tube; 381. Submarine fixed cable; 382. Submarine fixed anchor; 37. Submarine disturbance device; 371. Disturbance controller; 372. Movable shaft; 373. Movable arm; 374. Disturbance head; 10. Pressure source; 11. Gas supply pipe one; 12. Controller. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Reference Figure 1-6 This invention provides a seabed gas-water-solid multiphase fluid sampling device, comprising:

[0026] Surface unmanned vessel 1, surface unmanned vessel 1 is equipped with a pressure source 10, and the pressure source 10 is connected to an air supply pipe 11;

[0027] The seabed sampling robot 3 is connected to the surface unmanned vessel 1 via a sample transfer pipeline 2.

[0028] The sample transfer line 2 includes a U-shaped sampling tube 23, a second gas supply tube 22, and an umbilical cable 21. The second gas supply tube 22 is connected to the first gas supply tube 11. The U-shaped sampling tube 23 includes a control tube 211 and a sample delivery tube 212. The control tube 211 and the sample delivery tube 212 are connected to each other. The control tube 211 and the sample delivery tube 212 are connected to an inlet tube 214. A one-way valve 213 is installed on the inlet tube 214. The control tube 211 is connected to the first gas supply tube 11. Control valves 121 are installed on the first gas supply tube 11, the control tube 211, the second gas supply tube 22, and the sample delivery tube 212. The control valves 121 are electrically connected to a controller 12. The controller 12 is installed on the unmanned surface vessel 1.

[0029] The seabed sampling robot 3 includes an upper sampling robot 321 and a lower sampling robot 322. The gas supply pipe 22, the umbilical cable 21, and the sample inlet pipe 214 are all connected to the lower sampling robot 322. The upper sampling robot 321 is connected to the umbilical cable 21. A protective bracket 323 is installed on the upper sampling robot 321, and a seabed disturbance device 37 is installed on the protective bracket 323. A seabed fixing cable 381 is fixedly connected to the bottom surface of the lower sampling robot 322, and a seabed fixing anchor 382 is fixedly connected to the seabed fixing cable 381.

[0030] In this device, the surface unmanned surface vessel 1 receives and sends remote transmission signals to power the underwater robot 3 for sampling. After moving to the designated sea area, it releases the underwater sampling robot 3 and controls its movement in the seawater to receive and store the samples transmitted by the underwater robot 3. The pressure source 10 provides high-pressure gas for sampling; in this embodiment, it is an N2 type high-pressure gas cylinder. The gas delivery pipe 11 is the pipeline for delivering high-pressure gas. The controller 12 is used to control the connection status of different pipelines with the pressure source 10 and to control the sampling process. The control valve 121 is controlled by the controller 12. The sample transmission pipeline 2 is used to transmit the samples collected by the underwater robot 3, transport the samples, and transmit the gas-liquid-solid (biological) multiphase sludge mixed flow samples into the surface unmanned surface vessel 1, providing power and gas for the underwater sampling robot 3 to collect samples. The U-shaped sampling tube 21 is the main channel for the underwater samples to reach the surface unmanned surface vessel 1. High-pressure gas is delivered through the pressure source. 10. Gas supply pipe 11 enters control pipe 211 and then into sample delivery pipe 212. After seabed samples are collected by seabed sampling robot 3, they are sent to sample inlet pipe 214. The seabed samples in sample inlet pipe 214 also enter sample delivery pipe 212. After the gas and seabed samples mix in sample delivery pipe 212, they move towards the sea surface. High-pressure gas flow can drive the fluid sample in the pipe, allowing the seabed samples to reach the surface unmanned surface vessel 1 more quickly. One-way valve 213 ensures that the fluid direction in sample inlet pipe 214 is only from bottom to top, preventing fluid backflow to the seabed. Gas supply pipe 22 is used to supply the gas power source required for sampling by seabed sampling robot 3. Umbilical cable 23 provides the power required for sampling by seabed sampling robot 3. Seabed sampling robot 3 can sample by disturbing seabed silt and absorbing silt mixture flow at a designated ocean depth and location. It can move and sample on the seabed from a stationary location. Seabed sampling robot 3 has built-in sensors that can monitor the sample composition and status in real time.

[0031] The submarine fixed cable 381 is connected to the lower sampling robot 322 at the top and to the submarine fixed anchor 382 at the bottom. The sampling robot is released during seabed sampling. It is generally a steel cable. The submarine fixed anchor 382 is connected to the submarine fixed cable 381 at the top. When not in operation, it is fixed to the protective support 323. During seabed sampling, it is released from the lower part of the sampling robot 322 along the submarine fixed cable 381 and fixed to the seabed to prevent the three submarine sampling robots from moving together during operation.

[0032] Further optimization of the scheme: the seabed disturbance device 37 includes a disturbance controller 371, two fixed baffles 324 are fixedly connected to the protective bracket 323, the disturbance controller 371 is connected between the two fixed baffles 324, a movable shaft 372 is installed on the disturbance controller 371, a movable arm 373 is installed on the movable shaft 372, and a disturbance head 374 is installed on the movable arm 373.

[0033] The disturbance controller 371 controls the impact of seabed silt, including the impact method and magnitude. The movable shaft 372 can rotate left and right on the mounting surface, driving the movable arm to move synchronously. The movable arm 373 consists of two arms connected by a circular bearing. The left arm is fixedly mounted on the movable shaft 372, and the right arm can move up and down along the circular bearing surface. The movable shaft 372 and the movable arm 373 ensure that the disturbance controller can impact and disturb a designated point on the seabed. The disturbance head 374 can be a gas / liquid jet emitter to impact and disturb the seabed, or it can be a mechanical drill bit to directly disturb the seabed. The seabed disturbance device has various disturbance methods, including disturbance by high-pressure fluids such as high-pressure gas and liquid, or direct mechanical disturbance.

[0034] The design is further optimized. The upper sampling robot 321 includes a shell, a vertical thruster 311 is installed on the top surface of the shell, a horizontal thruster 312 is installed below the shell, a sampling connection tube 301 is installed on the shell, the sampling connection tube 301 is connected to the sample inlet tube 214, a fixed camera 331 and an LED light 341 are installed on the sampling connection tube 301, a movable camera 332 is installed on the shell, and a protective bracket 323 is fixedly connected to the shell.

[0035] Vertical thrusters 311 control the movement of the seabed sampling robot 3 on the underwater vertical plane, and horizontal thrusters 312 control the movement of the seabed sampling robot 3 on the underwater horizontal plane. Fixed camera 331 navigates and positions the seabed robot, providing it with a fixed field of view. Movable camera 332 consists of an external protective cover and an internal camera. The internal camera can move in both horizontal and vertical directions, providing the seabed robot with a mobile field of view. LED light 341 provides an underwater light source for the robot, and dysprosium lamp 342 provides an additional large-area underwater light source when the underwater lighting environment is poor. Sampling connection tube 301 is used to connect the sample inlet tube 214 and the lower robot 321.

[0036] The design is further optimized so that the lower sampling robot 322 is fixedly connected to the outer shell. The lower sampling robot 322 is equipped with a dysprosium lamp 342, an underwater sensor 35 and an underwater sampler 36. The sampling connection pipe 301 is connected to the lower sampling robot 322. The underwater sensor 35 includes a water quality sensor 351 and a temperature and pressure sensor 352.

[0037] The underwater sensor 35 monitors the real-time status of the multiphase flow sample on the seabed and assists in sampling; the water quality sensor 351 monitors the real-time data of the seabed sample, such as pH, ORP, and conductivity; and the temperature and pressure sensor 352 monitors the real-time temperature and pressure of the multiphase flow of the seabed sample.

[0038] The underwater sampler 36 is further optimized to include an underwater sampling tube 361 and a sampling filter tube 362. The underwater sampling tube 361 is installed on the lower sampling robot 322, and the sampling filter tube 362 is installed on the underwater sampling tube 361.

[0039] The underwater sampler 36 samples the mixed seabed silt; the underwater sampling tube 361 is the channel for the mixed seabed silt sample to enter the lower sampling robot 322; the sampling filter tube 362 filters the mixed seawater sample entering the underwater sampling tube to prevent large particles and large plankton from entering the pipe and clogging the pipe; the sample flow regulator 363 adjusts the density and flow state (multiphase or foam fluid) and mixed fluid composition of the sample collected at the sampling port as needed, and the fluid used for sampling can also be backflushed, lower sampling robot 32, and the internal pipeline of the underwater sampler 36.

[0040] The present invention relates to a seabed gas-water-solid multiphase fluid sampling device and a seabed silt sampling equipment that can perform real-time disturbance and fluidization sampling of seabed sediments (using equipment such as water jet, gas boiling device, stirring, seawater stirring, and sampling drill bit). During seabed silt sampling, the device can disturb or directly sample deep silt. During sampling, the three phases of gas, water, solid, and biological particles are simultaneously introduced. By analyzing the changes in the composition and content of each phase of the sample, the depositional state and compositional changes of seabed silt can be understood in real time. The device can also monitor the dynamics of various seabed substances and seabed microorganisms, marine earthquakes, and seabed leaks in real time. Since the seabed sampling device is located on the seabed and can be moved and sampled in real time, it can monitor the real-time conditions of the seabed in a large-area survey area at a relatively low cost.

[0041] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0042] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A seabed gas-water-solid multiphase fluid sampling device, characterized in that, include: The unmanned surface vessel (1) is equipped with a pressure source (10) and an air supply pipe (11) is connected to the pressure source (10). The seabed sampling robot (3) and the surface unmanned vessel (1) are connected by a sample transfer pipeline (2); The sample transfer line (2) includes a U-shaped sampling tube (23), a second gas supply tube (22), and an umbilical cable (21). The second gas supply tube (22) is connected to the first gas supply tube (11). The U-shaped sampling tube (23) includes a control tube (211) and a sample delivery tube (212). The control tube (211) and the sample delivery tube (212) are connected to each other. The control tube (211) and the sample delivery tube (212) are connected by an inlet tube (214). The sample inlet tube (214) is equipped with a one-way valve (213), the control tube (211) is connected to the first gas supply tube (11), and the first gas supply tube (11), the control tube (211), the second gas supply tube (22) and the sample delivery tube (212) are all equipped with control valves (121). The control valves (121) are electrically connected to a controller (12), and the controller (12) is installed on the unmanned surface vessel (1). The seabed sampling robot (3) includes an upper sampling robot (321) and a lower sampling robot (322). The second gas supply pipe (22), the umbilical cable (21), and the sample inlet pipe (214) are all connected to the lower sampling robot (322). The upper sampling robot (321) is connected to the umbilical cable (21). A protective bracket (323) is provided on the upper sampling robot (321), and a seabed disturbance device (37) is provided on the protective bracket (323). A seabed fixing cable (381) is fixedly connected to the bottom surface of the lower sampling robot (322), and a seabed fixing anchor (382) is fixedly connected to the seabed fixing cable (381). The seabed disturbance device (37) includes a disturbance controller (371), two fixed baffles (324) are fixedly connected to the protective bracket (323), the disturbance controller (371) is connected between the two fixed baffles (324), a movable shaft (372) is installed on the disturbance controller (371), a movable arm (373) is installed on the movable shaft (372), and a disturbance head (374) is installed on the movable arm (373). The sampling device can perform real-time disturbance and fluidized sampling of seabed sediments. The seabed sampling robot (3) disturbs the seabed silt and absorbs the silt mixture flow at a specified ocean and a specified depth to collect samples. The seabed disturber (37) has various disturbance methods, including high-pressure fluid disturbance or direct mechanical disturbance.

2. The subsea gas-water-solid multiphase fluid sampling device according to claim 1, characterized in that: The upper sampling robot (321) includes a shell, a vertical thruster (311) is installed on the top surface of the shell, a horizontal thruster (312) is installed below the shell, a sampling connection tube (301) is installed on the shell, the sampling connection tube (301) is connected to the sample inlet tube (214), a fixed camera (331) and an LED light (341) are installed on the sampling connection tube (301), a movable camera (332) is installed on the shell, and a protective bracket (323) is fixedly connected to the shell.

3. The subsea gas-water-solid multiphase fluid sampling device according to claim 2, characterized in that: The lower sampling robot (322) is fixedly connected to the outer shell. The lower sampling robot (322) is equipped with a dysprosium lamp (342), an underwater sensor (35) and an underwater sampler (36). The sampling connection pipe (301) is connected to the lower sampling robot (322). The underwater sensor (35) includes a water quality sensor (351) and a temperature and pressure sensor (352).

4. The subsea gas-water-solid multiphase fluid sampling device according to claim 3, characterized in that: The underwater sampler (36) includes an underwater sampling tube (361) and a sampling filter tube (362). The underwater sampling tube (361) is mounted on the lower sampling robot (322), and the sampling filter tube (362) is mounted on the underwater sampling tube (361).

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