A tool for achieving seabed surface pressure-maintaining sampling during wire rope operation and its usage method

Abstract

The present invention relates to the technical field of deep-sea surface pressure-maintaining sampling, and particularly refers to a wire rope operation tool for achieving subsea surface pressure-maintaining sampling and its usage method. The wire rope operation tool for achieving subsea surface pressure-maintaining sampling in the present invention includes an eccentric hook connection mechanism, an inner tube differential control mechanism, an outer tube connected with a ball valve, a lower-end ball valve sealing mechanism, a core tube mechanism, a sampling tube, and a pressure-maintaining transfer cabin. Through simple wire rope lowering and lifting operations, the tool for achieving subsea surface pressure-maintaining sampling is lowered to the seabed and penetrates the seabed, the surface sample is lifted and sealed for pressure maintenance, the ball valve is closed quickly for pressure maintenance and disassembled when out of the water surface, and the pressure-maintaining transfer cabin is simply transferred by gravity, improving production efficiency, reducing the technical requirements for ships for surface pressure-maintaining sampling, and reducing production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of deep - sea surface pressure - maintaining sampling, and particularly refers to a tool for realizing sub - sea surface pressure - maintaining sampling by wire rope operation and its using method. Background Art

[0002] For the need to study sediments containing natural gas hydrates and free - gas sediments, analyze the structure and composition of natural gas hydrates in natural sea areas, reveal their distribution in sediments under in - situ pressure and temperature conditions, avoid large - scale changes in the original sediment structure, establish a connection between the backscatter image of the seabed and the content of natural gas and natural gas hydrates in shallow - sea sediments, which can enable people to quickly map the gas content in the uppermost part of the seabed. At the same time, deep - sea sediments are considered to account for more than 60% of all bacterial biomass on Earth. Limited by technological development, the research on pressure - sensitive microorganisms in the underground high - pressure field is not yet mature. The scope of deep - microbial habitats, which is considered to account for about 10% of the total global biomass, has only been identified recently. Understanding the biosphere below the seabed may help to determine the limits of life on Earth and contribute to the identification of biotechnologically useful organisms. With the gradual development and maturity of marine pressure - maintaining sampling technology, humans have been able to obtain in - situ pressure - maintaining samples from the deep sea or underground wells, which provides feasible conditions for obtaining pressure - sensitive microbial samples in the deep sea or underground high - pressure fields. It is of great significance to evaluate the biological activity in deep - water sediments without pressure reduction.

[0003] The present invention provides a tool for realizing sub - sea surface pressure - maintaining sampling by wire rope operation and its using method. Using wire rope operation can facilitate and quickly conduct sub - sea surface pressure - maintaining sampling, reduce the technical requirements for ships for surface pressure - maintaining sampling, and the proposed simple and rapid pressure - maintaining transfer method can improve production efficiency. Summary of the Invention

[0004] The object of the present invention is: to solve the problems existing in the prior art, the present invention provides a tool for realizing sub - sea surface pressure - maintaining sampling by wire rope operation and its using method.

[0005] To solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0006] A tool for realizing sub - sea surface pressure - maintaining sampling by wire rope operation realizes the lowering of the pressure - maintaining sampling tool to the seabed and penetration into the seabed through wire rope lifting and lowering operations. The tool for realizing sub - sea surface pressure - maintaining sampling by wire rope operation includes an eccentric hook - connecting mechanism, an inner - tube differential control mechanism, an outer tube connected with a ball valve, a lower - end ball - valve sealing mechanism, a core - tube mechanism, a sampling tube, and a pressure - maintaining transfer chamber;

[0007] The eccentric hook connection mechanism, the outer pipe connected with a ball valve, the lower-end ball valve sealing mechanism, and the sampling pipe are concentrically and detachably connected in sequence from top to bottom to form an outer pipe assembly; the inner pipe differential control mechanism and the core barrel mechanism are detachably connected to form an inner pipe assembly, and the inner pipe assembly can slide within the outer pipe assembly; the eccentric hook connection mechanism is used to limit the upward sliding of the inner pipe assembly.

[0008] When the eccentric hook connection mechanism rotates downward, when the inner pipe assembly can slide upward, it triggers the automatic sealing of the lower-end ball valve sealing mechanism. Furthermore, the inner pipe differential control mechanism and the core barrel mechanism are separated, the inner pipe differential control mechanism slides upward to form an upper-end seal, and the core barrel mechanism slides downward.

[0009] The space between the upper-end seal and the outer pipe connected with a ball valve can form a first sealed space; the space between the outer pipe connected with a ball valve and the lower-end ball valve sealing mechanism can form a second sealed space.

[0010] After the inner pipe differential control mechanism is separated from the core barrel mechanism, the core barrel mechanism can slide downward into the second sealed space; the outer pipe connected with a ball valve can be detachably separated from the first sealed space, keeping the second sealed space unchanged, and realizing the docking of the second sealed space with the pressure-maintaining transfer chamber, and transferring the core barrel mechanism in the second sealed space to the pressure-maintaining transfer chamber.

[0011] As an improvement to the technical solution of the tool for achieving pressure-maintaining sampling of the seabed surface layer by wire rope operation in the present invention, the eccentric hook connection mechanism includes a right-angle eccentric hook and a right-angle eccentric hook installation and connection cylinder; an eccentric gravity block is arranged at the lower part of the right-angle eccentric hook.

[0012] The inner pipe differential control mechanism includes a wire rope, a first connecting rod, a cross bar, a spring clip bracket, a card release pipe, spring clip pliers, a first elastic pin, a second connecting rod, an accumulator, a sealing mechanism, a second elastic fishing hook, and a second elastic fishing hook installation joint.

[0013] The wire rope is fixedly connected with the first connecting rod, the first connecting rod is fixedly connected with the card release pipe, the cross bar is arranged on the first connecting rod, the right-angle eccentric hook of the eccentric hook connection mechanism is installed on the right-angle eccentric hook installation and connection cylinder through a shaft pin, and the rotatable right-angle eccentric hook is in hook connection contact with the cross bar of the inner pipe differential control mechanism. When the right-angle eccentric hook can maintain the hook connection contact and be stressed, the right-angle eccentric hook can be kept from rotating downward under the action of gravity of the eccentric gravity block, maintaining the hook connection.

[0014] As an improvement to the technical solution of the tool for achieving pressure-maintaining sampling of the seabed surface layer by wire rope operation in the present invention, the outer pipe connected with a ball valve includes a first ball valve and a first opening and closing buckle.

[0015] The outer tube connected with a ball valve separates the first enclosed space and the second enclosed space through the first ball valve, and is sealed and connected to the pressure-maintaining transfer cabin through the first opening and closing buckle.

[0016] As an improvement to the technical solution of the seabed surface pressure-maintaining sampling tool for wireline operation of the present invention, the outer tube connected with a ball valve also includes an inner tube differential limit joint, an upper end sealing connection pipe, a first opening and closing buckle, a first quick connection sealing ring, a first stop valve, a first ball valve, a second opening and closing buckle, a second quick connection sealing ring, and a lower end sealing connection pipe;

[0017] The first opening and closing buckle and the first quick-connection sealing ring, as well as the second opening and closing buckle and the second quick-connection sealing ring, respectively form a first sealing mechanism and a second sealing mechanism; the first sealing mechanism and the second sealing mechanism are respectively arranged at the upper and lower ends of the first ball valve; the upper end sealing connection pipe is passed through and connected to the first sealing mechanism, and the lower end sealing connection pipe is passed through and connected to the second sealing mechanism;

[0018] The first stop valve is arranged on the first ball valve, and the first stop valve is used to adjust the opening and closing of the first confined space, relieve the internal pressure of the first confined space, disassemble the first opening and closing buckle and separate the first sealed space connected to the outer tube with the ball valve; the upper end of the upper end sealing connecting pipe is provided with the inner tube differential limit joint, and the inner tube differential limit joint is used to control the connection and separation of the outer tube connected with the ball valve and the inner tube differential control mechanism.

[0019] As an improvement to the technical solution of the seabed surface pressure-maintaining sampling tool for wireline operation of the present invention, the pressure-maintaining transfer cabin includes a second ball valve, a pressure-resistant cabin, a second stop valve, a third stop valve, a third quick-connect sealing ring and a third quick-connect buckle;

[0020] The second stop valve and the third stop valve are respectively provided at both ends of the pressure cabin, and the second ball valve is provided on the outside of the third stop valve; the third quick connection buckle and the third quick connection sealing ring are provided at the lower part of the second ball valve;

[0021] The first ball valve with a ball valve connected to the outer tube can be quickly sealed and connected to the second ball valve of the pressure-maintaining transfer cabin through the third quick connection buckle and the third quick connection sealing ring;

[0022] When pressure holding and transfer are required, the second sealed space can be connected to the pressure holding transfer chamber through the first ball valve. Open the third stop valve and / or the second stop valve, and inject water and pressurize through the third stop valve and / or the second stop valve until the pressure is the same as that of the second sealed space, then the docking and transfer of the core barrel mechanism between the second sealed space and the pressure holding transfer chamber can be achieved.

[0023] As an improvement to the technical solution of the wire rope operation for achieving subsea surface pressure holding sampling tool of the present invention, the wire rope operation for achieving subsea surface pressure holding sampling tool further includes a protection support frame;

[0024] The outer pipe connected with the ball valve and the sampling pipe are installed in the protection support frame.

[0025] As an improvement to the technical solution of the wire rope operation for achieving subsea surface pressure holding sampling tool of the present invention, the protection support frame includes a ball valve protection cover, a stud, a limit plate, a structural truss and an installation support seat;

[0026] The ball valve protection cover is sleeved outside the first ball valve of the outer pipe connected with the ball valve, and the ball valve protection cover is connected to the installation support seat through the structural truss. The limit plate is installed on the upper surface of the installation support seat and is connected to the sampling pipe through the stud.

[0027] As an improvement to the technical solution of the wire rope operation for achieving subsea surface pressure holding sampling tool of the present invention, the core barrel mechanism includes a fishing spear, a lining pipe and a retaining spring;

[0028] The lining pipe is arranged inside the sampling pipe; the core barrel mechanism is detachably connected to the inner pipe differential control mechanism through a second elastic fishing hook and the fishing spear; the retaining spring is arranged at the lower part of the lining pipe.

[0029] A method for using a wire rope operation for achieving subsea surface pressure holding sampling tool, which is used in cooperation with the above-mentioned wire rope operation for achieving subsea surface pressure holding sampling tool, includes the following steps:

[0030] S1. Lift the inner pipe differential control mechanism. The eccentric hook connection mechanism is connected to the inner pipe differential control mechanism to restrict the upward sliding of the inner pipe assembly;

[0031] Lower the wire rope operation for achieving subsea surface pressure holding sampling tool to the subsea surface. The sampling pipe penetrates into the subsea surface, and the subsea surface sample penetrates into the core barrel mechanism;

[0032] Disconnect the connection between the inner pipe differential control mechanism and the eccentric hook connection mechanism;

[0033] S2. Recover and lift the wire rope through the inner pipe differential control mechanism to realize the subsea surface pressure-maintaining sampling tool. The inner pipe differential control mechanism is disengaged from the outer pipe connected with the ball valve. The inner pipe differential control mechanism and the core barrel mechanism move upward. The inner pipe differential control mechanism forms an upper seal, and the lower ball valve sealing mechanism forms a lower seal at the lower end. The inner pipe differential control mechanism is disengaged from the core barrel mechanism;

[0034] The space between the upper seal and the outer pipe connected with the ball valve forms a first sealed space; the space between the outer pipe connected with the ball valve and the lower ball valve sealing mechanism forms a second sealed space; the core barrel mechanism falls into the second sealed space;

[0035] The space between the outer pipe connected with the ball valve and the lower ball valve sealing mechanism forms a second sealed space and docks with the pressure-maintaining transfer cabin, transferring the core barrel mechanism into the pressure-maintaining transfer cabin;

[0036] S3. Increase the pressure in the pressure-maintaining transfer cabin. When the internal pressure of the pressure-maintaining transfer cabin is balanced with the pressure in the second sealed space, open the first ball valve in the outer pipe connected with the ball valve, and the core barrel mechanism can be vertically flipped to achieve gravity sliding and pressure-maintaining transfer by gravity.

[0037] A method for using a wire rope operation to realize a subsea surface pressure-maintaining sampling tool, which is used in conjunction with the above-mentioned wire rope operation to realize a subsea surface pressure-maintaining sampling tool, includes the following steps:

[0038] S1. The right-angle eccentric hook of the eccentric hook connection mechanism is in contact with the crossbar hook of the inner pipe differential control mechanism, restricting the upward sliding of the inner pipe assembly; the lifting wire rope is tightened until the right-angle eccentric hook does not rotate downward under the action of gravity of the eccentric gravity block, maintaining the hook connection; continue to lift the wire rope operation to realize the subsea surface pressure-maintaining sampling tool, lower it underwater to contact the seabed, and rely on the self-weight of the wire rope operation to realize the subsea surface pressure-maintaining sampling tool. The sampling pipe penetrates into the subsea surface, and the subsea surface sample enters the inner liner pipe in the core inner pipe mechanism;

[0039] At the same time, the resistance of the surface sample entering the inner liner pipe is transmitted to the outer pipe connected with the ball valve and the protection support frame through the second elastic fishing hook installation joint and the spring clip pliers of the inner pipe differential control mechanism;

[0040] S2. Continue to lower the wire rope operation to realize the subsea surface pressure-maintaining sampling tool through the wire rope until the wire rope is relatively slack. At this time, the seabed completely bears the self-weight of the wire rope operation to realize the subsea surface pressure-maintaining sampling tool. The right-angle eccentric hook of the eccentric hook connection mechanism rotates downward through the eccentric gravity block and disengages from the hook connection with the inner pipe differential control mechanism, and the inner pipe assembly can slide upward;

[0041] S3. Drive the release pipe to move upward relative to the spring clip bracket through the steel wire rope to retract the spring clip pliers. The spring clip pliers are disengaged from the spring clip limit joint, driving the inner pipe differential control mechanism and the core barrel mechanism to move upward;

[0042] When the retaining spring moves upward above the first ball valve, the lower end sealing ball valve is pushed downward by the ball valve driving spring to flip 90 degrees to form a lower end seal; steel wire rope, first connecting rod, cross bar, spring clip bracket, release pipe, spring clip pliers, first elastic pin, second connecting rod, accumulator, sealing mechanism, second elastic fishing hook and second elastic fishing hook mounting joint;

[0043] S4. Continue to lift the steel wire rope until the upper shoulder of the second elastic fishing hook mounting joint contacts the upper reduced diameter shoulder of the upper end sealing connecting pipe, and the sealing structure enters the sealing surface of the upper end sealing connecting pipe to form an upper end seal;

[0044] At the same time, the upper part of the second elastic fishing hook enters the upper reduced diameter section of the upper end sealing connecting pipe, and the second elastic fishing hook disengages from the fishing spear; the core barrel mechanism freely falls under the action of gravity until the retaining spring contacts the lower end sealing ball valve and stops falling;

[0045] S5. Continue to lift the steel wire rope. The operation of the steel wire rope enables the subsea surface pressure - maintaining sampling tool to leave the seabed and reach the ship's deck. Close the first ball valve. The first ball valve forms a second upper end seal relative to the lower end seal. Open the first stop valve to slowly relieve the high pressure inside the first connecting pipe to atmospheric pressure. Loosen the first open - close buckle and extract the upper end sealing connecting pipe; [[ID=)13]]

[0046] S6. Connect the first ball valve and the second ball valve of the pressure - maintaining transfer cabin through the third quick - connecting buckle. Open the second ball valve. Open the second stop valve and / or the third stop valve to inject water into the pressure - resistant cabin until the pressure inside the pressure - resistant cabin is balanced with the pressure inside the lower end sealing connecting pipe at one end of the first ball valve. Then open the first ball valve and turn it vertically to achieve the gravity - sliding pressure - maintaining transfer of the core barrel mechanism;

[0047] S7. Close the second ball valve and open the first stop valve to relieve the pressure inside the lower end sealing connecting pipe at one end of the first ball valve, and disassemble the third quick - connecting sealing ring, thereby achieving the transfer of the pressure - maintaining sample to the pressure - maintaining loading and transfer cabin for laboratory preservation while keeping the pressure unchanged.

[0048] Advantages of the present invention:

[0049] In the present invention, a subsea surface pressure - maintaining sampling tool and its usage method realized by steel wire rope operation are provided. Through simple steel wire lifting and lowering operations, the effects of lowering the pressure - maintaining sampling tool to the seabed, penetrating the seabed, lifting the surface sample for sealed pressure - maintaining, closing the ball valve quickly for disassembly above the water surface, and gravity - simple transfer in the pressure - maintaining transfer cabin are achieved, improving production efficiency, reducing the technical requirements of the ship for surface pressure - maintaining sampling, and reducing production costs. Brief Description of the Drawings

[0050] Figure 1 is a schematic structural diagram of the present invention;

[0051] Figure 2 is a schematic structural diagram of the pressure-holding transfer cabin in the present invention;

[0052] Figure 3 is a schematic diagram of lowering the surface pressure-holding sampling of the present invention, wherein:

[0053] Figure 3(a) is a schematic diagram of the installation on the ship's deck;

[0054] Figure 3(b) is a schematic diagram of lowering to the seabed and gravity-pressing into the seabed for sampling;

[0055] Figure 3(c) is a schematic diagram of lifting the inner pipe mechanism of the core barrel to above the lower end sealing ball valve, and the lower end sealing ball valve automatically flips and seals;

[0056] Figure 3(d) is a schematic diagram of continuing to lift the inner pipe mechanism of the core barrel, and the inner pipe mechanism of the core barrel unhooks and falls above the lower end sealing ball valve;

[0057] Figure 3(e) is a schematic diagram of continuing to lift and leaving the seabed;

[0058] Figure 3(f) is a schematic diagram of recovering to the ship's deck.

[0059] Description of the Reference Numerals: 10 - Eccentric Hook Connection Mechanism; 101 - Right-Angle Eccentric Hook; 102 - Right-Angle Eccentric Hook Installation and Connection Cylinder; 103 - Eccentric Gravity Block;

[0060] 20 - Inner Pipe Differential Control Mechanism; 201 - Steel Wire Rope; 202 - First Connecting Rod; 203 - Cross Bar; 204 - Spring Clip Bracket; 205 - Unclamping Pipe; 206 - Spring Clip Pliers; 207 - First Elastic Pin; 208 - Second Connecting Rod; 209 - Accumulator; 210 - Sealing Structure; 211 - Second Elastic Fishing Hook; 212 - Second Elastic Fishing Hook Installation Joint;

[0061] 30 - Outer Pipe with Ball Valve Connection; 301 - Inner Pipe Differential Limit Joint; 302 - Upper End Sealing Connection Pipe; 303 - First Openable and Closable Snap; 304 - First Quick-Connect Sealing Ring; 305 - First Stop Valve; 306 - First Ball Valve; 307 - Second Openable and Closable Snap; 308 - Second Quick-Connect Sealing Ring; 309 - Lower End Sealing Connection Pipe;

[0062] 40 - Lower end sealing mechanism; 401 - Ball valve pipe connection joint; 402 - Spring limit ring; 403 - Ball valve drive spring; 404 - Ball valve drive pipe; 405 - Upper ball valve seat; 406 - Ball valve pipe; 407 - Lower end sealing ball valve; 408 - Lower ball valve seat; 409 - Support spring; 410 - Lower ball valve support seat; 411 - Adapter joint;

[0063] 50 - Inner core barrel inner pipe mechanism; 501 - Fishing spear; 502 - Liner pipe; 503 - Retaining spring;

[0064] 60 - Sampling pipe;

[0065] 70 - Protection support frame; 701 - Ball valve protection cover; 702 - Dowel pin; 703 - Limit plate; 704 - Structural truss; 705 - Installation support seat;

[0066] 80 - Pressure - maintaining transfer cabin; 801 - Second ball valve; 802 - Pressure - resistant cabin; 803 - Second stop valve; 804 - Third stop valve; 805 - Third quick - connect sealing ring; 806 - Third quick - connect buckle. Detailed implementation mode

[0067] To make the invention purpose, technical solution and beneficial effects of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0068] As Figure 1 Shown in FIGS. 2 to 3, a wire - rope operation - enabled seabed surface pressure - maintaining sampling tool realizes the lowering of the pressure - maintaining sampling tool to the seabed and penetration into the seabed through wire - rope lifting and lowering operations. The wire - rope operation - enabled seabed surface pressure - maintaining sampling tool includes an eccentric hook - connecting mechanism 10, an inner - pipe differential control mechanism 20, a ball - valve - connected outer pipe 30, a lower - end ball - valve sealing mechanism 40, a core barrel mechanism 50, a sampling pipe 60, and a pressure - maintaining transfer cabin 80;

[0069] The eccentric hook - connecting mechanism 10, the ball - valve - connected outer pipe 30, the lower - end ball - valve sealing mechanism 40, and the sampling pipe 60 are concentrically and detachably connected in sequence from top to bottom to form an outer - pipe assembly; the inner - pipe differential control mechanism 20 and the core barrel mechanism 50 are detachably connected to form an inner - pipe assembly, and the inner - pipe assembly can slide within the outer - pipe assembly;

[0070] When the inner - pipe assembly slides upward, it triggers the automatic sealing of the lower - end ball - valve sealing mechanism 40. Furthermore, the inner - pipe differential control mechanism 20 and the core barrel mechanism 50 are separated, the inner - pipe differential control mechanism 20 slides upward to form an upper - end seal, and the core barrel mechanism 50 slides downward;

[0071] The space between the upper seal and the outer pipe 30 connected with the ball valve can form a first sealed space; the space between the outer pipe 30 connected with the ball valve and the lower ball valve sealing mechanism 40 can form a second sealed space;

[0072] The inner pipe differential control mechanism 20 is separated from the core barrel mechanism 50 and can slide downward into the second sealed space; the outer pipe 30 connected with the ball valve can be detachably separated from the first sealed space, keeping the second sealed space unchanged, and realizing the docking of the second sealed space with the pressure-holding transfer cabin 80, and transferring the core barrel mechanism 50 in the second sealed space to the pressure-holding transfer cabin 80.

[0073] In the present invention, a tool capable of performing pressure-holding transfer while taking pressure-holding samples is provided. Through simple wire lowering and lifting operations, the effects of lowering the pressure-holding sampling tool to the seabed, penetrating the seabed, lifting the surface sample for sealing and pressure-holding, closing the ball valve quickly for disassembly above the water surface, and simply transferring the pressure-holding transfer cabin by gravity are achieved, improving production efficiency, reducing the technical requirements of the ship for surface pressure-holding sampling, and reducing production costs.

[0074] In some embodiments of the present invention, the outer pipe 30 connected with the ball valve includes a first ball valve 306 and a first opening and closing type buckle 303; the outer pipe 30 connected with the ball valve separates the first sealed space and the second sealed space through the first ball valve 306, and is hermetically connected with the pressure-holding transfer cabin 80 through the first opening and closing type buckle 303.

[0075] The outer pipe 30 connected with the ball valve further includes an inner pipe differential limit joint 301, an upper end seal connecting pipe 302, a first opening and closing type buckle 303, a first quick connection seal ring 304, a first stop valve 305, a first ball valve 306, a second opening and closing type buckle 307, a second quick connection seal ring 308, and a lower end seal connecting pipe 309;

[0076] The first opening and closing type buckle 303 and the first quick connection seal ring 304, and the second opening and closing type buckle 307 and the second quick connection seal ring 308 respectively form a first sealing mechanism and a second sealing mechanism; the first sealing mechanism and the second sealing mechanism are respectively arranged at the upper and lower ends of the first ball valve 306; the upper end seal connecting pipe 302 is arranged in the first sealing mechanism, and the lower end seal connecting pipe 309 is arranged in the second sealing mechanism;

[0077] The first stop valve 305 is arranged on the upper end seal connecting pipe 302, and the first stop valve 305 is used to adjust the opening and closing of the upper end seal connecting pipe 302;

[0078] An inner pipe differential limit joint 301 is arranged at the upper end of the upper end seal connecting pipe. The inner pipe differential limit joint 301 is used for the detachable connection between the outer pipe 30 connected with the ball valve and the inner pipe differential control mechanism 20.

[0079] In certain embodiments of the present invention, the pressure-holding transfer chamber 80 includes a second ball valve 801, a pressure-resistant chamber 802, a second stop valve 803, a third stop valve 804, a third quick-connect sealing ring 805, and a third quick-connect buckle 806; the second stop valve 803 and the third stop valve 804 are respectively arranged at both ends of the pressure-resistant chamber 802, and the second ball valve 801 is arranged outside the third stop valve 804; the third quick-connect buckle 806 and the third quick-connect sealing ring 805 are arranged at the lower part of the second ball valve 801;

[0080] When pressure-holding transfer is required, open the third stop valve 804 and / or the second stop valve 803, and inject water to hold pressure through the third stop valve 804 and / or the second stop valve 803.

[0081] In certain embodiments of the present invention, the wire rope operation for realizing the pressure-holding sampling tool on the seabed surface further includes a protection support frame 70; the ball valve-connected outer pipe 30 and the sampling pipe 60 are installed in the protection support frame 70.

[0082] The protection support frame 70 includes a ball valve protection cover 701, a stud 702, a limit plate 703, a structural truss 704, and a mounting support base 705;

[0083] The ball valve protection cover 701 is sleeved outside the first ball valve 306 of the ball valve-connected outer pipe 30, and the ball valve protection cover 701 is connected to the mounting support base 705 through the structural truss 704. The limit plate 703 is installed on the upper surface of the mounting support base 705 and is connected to the sampling pipe 60 through the stud 702.

[0084] In certain embodiments of the present invention, the core barrel mechanism 50 includes a fishing spear 501, an inner lining pipe 502, and a retaining spring 503; the inner lining pipe 502 is arranged inside the sampling pipe 60; the core barrel mechanism 50 is detachably connected to the inner pipe differential control mechanism 20 through the fishing spear 501; the retaining spring 503 is arranged at the lower part of the inner lining pipe 502.

[0085] In certain embodiments of the present invention, the eccentric hook connection mechanism 10 includes a right-angle eccentric hook 101 and a right-angle eccentric hook installation connection cylinder 102; an eccentric gravity block 103 is arranged at the lower part of the right-angle eccentric hook 101;

[0086] The inner pipe differential control mechanism 20 includes a wire rope 201, a first connecting rod 202, a cross bar 203, a spring clip bracket 204, a release pipe 205, a spring clip pliers 206, a first elastic pin 207, a second connecting rod 208, an accumulator 209, a sealing mechanism 210, a second elastic fishing hook 211, and a second elastic fishing hook installation joint 212;

[0087] The wire rope 201 is fixedly connected to the first connecting rod 202, the first connecting rod 202 is fixedly connected to the card-removing tube 205, the cross bar 203 is arranged on the first connecting rod 202, the right-angle eccentric hook 101 of the eccentric hook connection mechanism 10 is installed on the right-angle eccentric hook installation connection cylinder 102 through a shaft pin, and the rotatable right-angle eccentric hook 101 is in hook connection contact with the cross bar 203 of the inner tube differential control mechanism 20. When the right-angle eccentric hook 101 can maintain the hook connection contact and be stressed with the cross bar 203, the right-angle eccentric hook 101 can be kept from rotating downward under the action of gravity of the eccentric gravity block, and the hook connection is maintained.

[0088] Specifically, in the present invention, the inner tube differential control mechanism 20 and the core tube mechanism 50 can be triggered to slide relatively upward through the eccentric hook connection mechanism 10. The upper part of the inner tube differential control mechanism 20 forms an upper seal, and the lower end ball valve sealing mechanism 40 forms a lower seal. The upper part of the lower end ball valve sealing mechanism 40 is sealed with the upper part, and the lower end ball valve sealing mechanism 40 and the core tube mechanism 50 are isolated by the ball valve-connected outer tube 30 with a ball valve into two independent first sealing spaces and second sealing spaces; through the detachable connection of the ball valve-connected outer tube 30 with the eccentric hook connection mechanism 10 and the inner tube differential control mechanism 20, the ball valve-connected outer tube 30 is docked with the pressure-holding transfer cabin 80, and the transfer ball valve-connected outer tube 30 is transferred into the second sealing space.

[0089] When the eccentric gravity block drives the right-angle eccentric hook 101 to rotate downward under the action of gravity, the right-angle eccentric hook 101 is separated from the cross bar 203, thereby realizing the mutual separation effect of the eccentric hook connection mechanism 10 and the inner tube differential control mechanism 20.

[0090] The present invention also discloses a use method of a wire rope operation to realize a subsea surface layer pressure-holding sampling tool, which is used in cooperation with the wire rope operation to realize the subsea surface layer pressure-holding sampling tool as described above, and includes the following steps:

[0091] S1. Lift the inner tube differential control mechanism 20, the eccentric hook connection mechanism 10 is connected to the inner tube differential control mechanism 20, and the upward sliding of the inner tube assembly is restricted;

[0092] Lower the wire rope operation to realize the subsea surface layer pressure-holding sampling tool to the subsea surface layer, the sampling tube 60 penetrates into the subsea surface layer, and the subsea surface layer sample penetrates into the core tube mechanism 50;

[0093] Disconnect the connection between the inner tube differential control mechanism 20 and the eccentric hook connection mechanism 10;

[0094] S2. Recover and lift the wire rope through the inner pipe differential control mechanism 20 to implement the subsea surface pressure-maintaining sampling tool. The inner pipe differential control mechanism 20 is disengaged from the ball valve-connected outer pipe 30. The inner pipe differential control mechanism 20 and the core barrel mechanism 50 move upward. The inner pipe differential control mechanism 20 forms an upper seal, and the lower ball valve sealing mechanism 40 forms a lower seal at the lower end. The inner pipe differential control mechanism 20 is disengaged from the core barrel mechanism 50.

[0095] The space between the upper seal and the ball valve-connected outer pipe 30 forms a first sealed space. The space between the ball valve-connected outer pipe 30 and the lower ball valve sealing mechanism 40 forms a second sealed space. The core barrel mechanism 50 falls into the second sealed space.

[0096] The space between the ball valve-connected outer pipe 30 and the lower ball valve sealing mechanism 40 forms a second sealed space and is docked with the pressure-maintaining transfer cabin 80 to transfer the core barrel mechanism 50 into the pressure-maintaining transfer cabin 80.

[0097] S3. Increase the pressure in the pressure-maintaining transfer cabin 80. When the internal pressure of the pressure-maintaining transfer cabin 80 is balanced with the pressure in the second sealed space, open the first ball valve 306 in the ball valve-connected outer pipe 30, and then the core barrel mechanism 50 can slide down under gravity for pressure-maintaining transfer by vertical flipping.

[0098] Specifically, in the present invention, the following steps are included:

[0099] S1. The right-angle eccentric hook of the eccentric hook connection mechanism is in contact with the crossbar hook of the inner pipe differential control mechanism to restrict the upward sliding of the inner pipe assembly. The lifting wire rope is tightened until the right-angle eccentric hook does not rotate downward under the action of gravity of the eccentric gravity block, and the hook connection is maintained. Continue to lift the wire rope to operate the subsea surface pressure-maintaining sampling tool. Lower it underwater to contact the seabed. Rely on the self-weight of the subsea surface pressure-maintaining sampling tool by wire rope operation. The sampling pipe penetrates into the subsea surface, and the subsea surface sample enters the inner liner pipe in the core barrel mechanism of the inner pipe.

[0100] At the same time, the resistance of the surface sample entering the inner liner pipe is transmitted to the ball valve-connected outer pipe and the protection support frame through the second elastic fishing hook installation joint and the spring clip pliers of the inner pipe differential control mechanism.

[0101] S2. Continue to lower the wire rope to operate the subsea surface pressure-maintaining sampling tool until the wire rope is relatively slack. At this time, the seabed completely bears the self-weight of the subsea surface pressure-maintaining sampling tool. The right-angle eccentric hook of the eccentric hook connection mechanism rotates downward through the eccentric gravity block to disengage the hook connection with the inner pipe differential control mechanism, and the inner pipe assembly can slide upward.

[0102] S3, the wire rope drives the ejection tube to move upward relative to the ejection bracket and retract the ejection caliper, so that the ejection caliper is disengaged from the ejection limit joint, driving the inner tube differential control mechanism and the core tube mechanism to move upward;

[0103] When the retaining spring moves up to the top of the first ball valve, the lower end sealing ball valve is turned downward 90 degrees under the push of the ball valve driving spring to form a lower end seal; the wire rope, the first connecting rod, the cross bar, the spring bracket, the card release tube, the spring caliper, the first elastic pin, the second connecting rod, the accumulator, the sealing mechanism, the second elastic fishing hook and the second elastic fishing hook installation joint

[0104] S4. Continue to lift the wire rope until the upper shoulder of the second elastic fishing hook installation joint contacts the upper reduced-diameter shoulder of the upper sealing connecting pipe, and the sealing structure enters the sealing surface of the upper sealing connecting pipe to form an upper seal.

[0105] At the same time, the upper part of the second elastic salvage hook enters the upper reduced diameter section of the upper sealed connecting pipe, and the second elastic salvage hook is separated from the salvage spear; the core barrel mechanism falls freely under the action of gravity until the retaining spring contacts the lower end sealing ball valve and stops falling;

[0106] S5. Continue to pull up the wire rope. The wire rope operation enables the seabed surface pressure-maintaining sampling tool to leave the seabed and reach the deck of the ship. Close the first ball valve. The first ball valve forms a second upper seal relative to the lower seal. Open the first stop valve to slowly release the high pressure inside the first connecting pipe to normal pressure. Loosen the first opening and closing buckle and pull out the upper sealed connecting pipe.

[0107] S6. Connect the first ball valve to the second ball valve of the pressure-maintaining transfer cabin through the third quick-connect buckle. Open the second ball valve, open the second stop valve and / or the third stop valve to inject water into the pressure-resistant cabin until the pressure inside the pressure-resistant cabin and the pressure inside the sealed connecting pipe at the lower end of one end of the first ball valve are balanced. Then, open the first ball valve and flip it vertically to achieve gravity sliding pressure-maintaining transfer of the core barrel mechanism.

[0108] S7. Close the second ball valve and open the first stop valve to release the internal pressure of the lower end sealing connecting pipe at one end of the first ball valve. Remove the third quick-connect sealing ring to achieve constant pressure and transfer the pressure-maintained sample to the pressure-maintaining transfer cabin for laboratory storage.

[0109] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A tool for achieving seafloor surface pressure-maintaining sampling during wire rope operation, characterized in that, Through wire lifting and lowering operations, the pressure-maintaining sampling tool is lowered to the seabed and penetrated into the seabed. The wire rope operation for the seabed surface pressure-maintaining sampling tool includes an eccentric hook connection mechanism (10), an inner tube differential control mechanism (20), an outer tube with a ball valve connection (30), a lower-end ball valve sealing mechanism (40), a core tube mechanism (50), a sampling tube (60), and a pressure-maintaining transfer chamber (80). The eccentric hook connection mechanism (10), the outer tube with a ball valve connection (30), the lower-end ball valve sealing mechanism (40), and the sampling tube (60) are concentrically and detachably connected in sequence from top to bottom to form an outer tube assembly. The inner tube differential control mechanism (20) and the core tube mechanism (50) are detachably connected to form an inner tube assembly, and the inner tube assembly can slide within the outer tube assembly. The eccentric hook connection mechanism (10) is used to restrict the upward sliding of the inner tube assembly. When the eccentric hook connection mechanism (10) rotates downward and the inner tube assembly can slide upward, it triggers the automatic sealing of the lower-end ball valve sealing mechanism (40). Then, the inner tube differential control mechanism (20) and the core tube mechanism (50) are separated, the inner tube differential control mechanism (20) slides upward to form an upper-end seal, and the core tube mechanism (50) slides downward. The space between the upper-end seal and the outer tube with a ball valve connection (30) can form a first sealed space. The space between the outer tube with a ball valve connection (30) and the lower-end ball valve sealing mechanism (40) can form a second sealed space. After the inner tube differential control mechanism (20) is separated from the core tube mechanism (50), the core tube mechanism (50) can slide downward into the second sealed space. The outer tube with a ball valve connection (30) is detachably separated from the first sealed space, keeping the second sealed space unchanged, and realizing the docking of the second sealed space with the pressure-maintaining transfer chamber (80), and transferring the core tube mechanism (50) in the second sealed space to the pressure-maintaining transfer chamber (80).

2. The seafloor surface pressure-maintaining sampling tool for wire rope operation according to claim 1, characterized in that The eccentric hook connection mechanism (10) includes a right-angle eccentric hook (101) and a right-angle eccentric hook installation connection cylinder (102). A eccentric gravity block (103) is arranged at the lower part of the right-angle eccentric hook (101). The inner tube differential control mechanism (20) includes a wire rope (201), a first connecting rod (202), a cross bar (203), a spring clip bracket (204), a card release tube (205), a spring clip pliers (206), a first elastic pin (207), a second connecting rod ( The steel wire rope (201) is fixedly connected to the first connecting rod (202), the first connecting rod (202) is fixedly connected to the de-carding tube (205), the cross bar (203) is arranged on the first connecting rod (202), the right-angle eccentric hook (101) of the eccentric hook connection mechanism (10) is installed on the right-angle eccentric hook installation connection cylinder (102) through an axle pin, and the right-angle eccentric hook (101) can be rotated to be hooked and contacted with the cross bar (203) of the inner tube differential control mechanism (20), and when the right-angle eccentric hook (101) can be kept in hooked contact with the cross bar (203) and subjected to force, the right-angle eccentric hook (101) can be kept from rotating downward under the action of gravity of the eccentric gravity block, thereby maintaining the hook connection.

3. The seafloor surface pressure-maintaining sampling tool for wire rope operation according to claim 1, wherein The outer tube (30) connected with a ball valve comprises a first ball valve (306) and a first opening and closing buckle (303); The outer tube (30) with a ball valve connection separates the first enclosed space and the second enclosed space via the first ball valve (306), and is sealedly connected to the pressure-maintaining transfer cabin (80) via the first opening and closing buckle (303).

4. The wire rope operation-based seabed surface pressure-maintaining sampling tool according to claim 1 or 3, characterized in that, The outer tube (30) connected with a ball valve further comprises an inner tube differential limit joint (301), an upper end sealing connection tube (302), a first opening and closing buckle (303), a first quick connection sealing ring (304), a first stop valve (305), a first ball valve (306), a second opening and closing buckle (307), a second quick connection sealing ring (308), and a lower end sealing connection tube (309); The first opening and closing buckle (303) and the first quick-connection sealing ring (304) as well as the second opening and closing buckle (307) and the second quick-connection sealing ring (308) respectively form a first sealing mechanism and a second sealing mechanism; the first sealing mechanism and the second sealing mechanism are respectively arranged at the upper and lower ends of the first ball valve (306); the upper end sealing connection pipe (302) is passed through and connected to the first sealing mechanism, and the lower end sealing connection pipe (309) is passed through and connected to the second sealing mechanism; The first stop valve (305) is arranged on the first ball valve (306), and the first stop valve (305) is used to adjust the opening and closing of the first enclosed space, relieve the internal pressure of the first enclosed space, disassemble the first opening and closing buckle (303), and separate the first sealed space connected to the outer tube (30) connected with the ball valve; the upper end of the upper end sealing connection pipe is provided with the inner tube differential limit joint (301), and the inner tube differential limit joint (301) is used to control the connection and separation of the outer tube (30) connected with the ball valve and the inner tube differential control mechanism (20).

5. The wire rope operation-based seabed surface pressure-maintaining sampling tool according to claim 4, wherein The pressure-maintaining transfer cabin (80) comprises a second ball valve (801), a pressure-resistant cabin (802), a second stop valve (803), a third stop valve (804), a third quick-connect sealing ring (805), and a third quick-connect buckle (806); The two ends of the pressure-resistant cabin (802) are respectively provided with the second stop valve (803) and the third stop valve (804), and the second ball valve (801) is arranged outside the third stop valve (804); the lower part of the second ball valve (801) is provided with the third quick-connect buckle (806) and the third quick-connect sealing ring (805); The first ball valve (306) of the ball valve-connected outer pipe (30) can be quickly and hermetically connected to the second ball valve (801) of the pressure-holding transfer cabin (80) through the third quick-connect buckle (806) and the third quick-connect sealing ring (805); When pressure-holding transfer is required, the second sealed space can be connected to the pressure-holding transfer cabin (80) through the first ball valve (306). Open the third stop valve (804) and / or the second stop valve (803), and inject water and pressurize through the third stop valve (804) and / or the second stop valve (803) until the pressure is the same as that of the second sealed space, then the docking and transfer of the core barrel mechanism (50) between the second sealed space and the pressure-holding transfer cabin (80) can be realized.

6. The seabed surface pressure-maintaining sampling tool for wire rope operation according to claim 1, wherein The wire rope operation for realizing the seabed surface pressure-holding sampling tool further includes a protection support frame (70); The ball valve-connected outer pipe (30) and the sampling pipe (60) are installed in the protection support frame (70).

7. The wire rope-operated seabed surface pressure-maintaining sampling tool according to claim 6, wherein, The protection support frame (70) includes a ball valve protection cover (701), a stud (702), a limit plate (703), a structural truss (704) and an installation support seat (705); The ball valve protection cover (701) is sleeved outside the first ball valve (306) of the ball valve-connected outer pipe (30), and the ball valve protection cover (701) is connected to the installation support seat (705) through the structural truss (704). The limit plate (703) is installed on the upper surface of the installation support seat (705) and is connected to the sampling pipe (60) through the stud (702).

8. The seabed surface pressure-maintaining sampling tool for wire rope operation according to claim 1, characterized in that, The core barrel mechanism (50) includes a fishing spear (501), a lining pipe (502) and a retaining spring (503); The lining pipe (502) is arranged inside the sampling pipe (60); the core barrel mechanism (50) and the inner pipe differential control mechanism (20) are detachably connected through the second elastic fishing hook (211) and the fishing spear (50). The retaining spring (503) is arranged at the lower part of the lining pipe (502).

9. A method for using a tool for seafloor surface pressure-maintaining sampling realized by wire rope operation, characterized in that, When used in conjunction with the wire rope operation for realizing the seabed surface pressure-holding sampling tool as described in any one of claims 1-8, the following steps are included: S1. Lift the inner pipe differential control mechanism (20). The eccentric hook connection mechanism (10) is connected to the inner pipe differential control mechanism (20) to limit the upward sliding of the inner pipe assembly; Lower the wire rope operation for realizing the seabed surface pressure-holding sampling tool to the seabed surface. The sampling pipe (60) penetrates into the seabed surface, and the seabed surface sample penetrates into the core barrel mechanism (50); Disconnect the connection between the inner pipe differential control mechanism (20) and the eccentric hook connection mechanism (10); S2. Recover and lift the wire rope through the inner pipe differential control mechanism (20) to operate the subsea surface pressure-maintaining sampling tool. The inner pipe differential control mechanism (20) is disengaged from the outer pipe (30) connected with a ball valve. The inner pipe differential control mechanism (20) and the core barrel mechanism (50) move upward. The inner pipe differential control mechanism (20) forms an upper seal, and the lower ball valve sealing mechanism (40) forms a lower seal; the inner pipe differential control mechanism (20) is disengaged from the core barrel mechanism (50). The space between the upper seal and the outer pipe (30) connected with a ball valve forms a first sealed space; the space between the outer pipe (30) connected with a ball valve and the lower ball valve sealing mechanism (40) forms a second sealed space; the core barrel mechanism (50) falls into the second sealed space. The space between the outer pipe (30) connected with a ball valve and the lower ball valve sealing mechanism (40) forms a second sealed space which is docked with the pressure-maintaining transfer chamber (80), and the core barrel mechanism (50) is transferred into the pressure-maintaining transfer chamber (80). S3. Increase the pressure in the pressure-maintaining transfer chamber (80). When the internal pressure of the pressure-maintaining transfer chamber (80) is balanced with the pressure in the second sealed space, open the first ball valve (306) in the outer pipe (30) connected with a ball valve, and the core barrel mechanism (50) can be transferred under pressure by gravity by vertical flipping.

10. A method for using a tool for obtaining seabed surface pressure-maintaining samples during wire rope operation, characterized in that, When used in cooperation with the wire rope operation of the subsea surface pressure-maintaining sampling tool as described in any one of claims 1-8, the following steps are included: S1. The right-angle eccentric hook (101) of the eccentric hook connection mechanism (10) is in hook connection contact with the cross bar (203) of the inner pipe differential control mechanism (20) to restrict the upward sliding of the inner pipe assembly; the lifting wire rope (201) is tightened until the right-angle eccentric hook (101) does not rotate downward under the action of gravity of the eccentric gravity block, and the hook connection is maintained; continue to lift the wire rope to operate the subsea surface pressure-maintaining sampling tool, lower it underwater to contact the seabed, and rely on the self-weight of the subsea surface pressure-maintaining sampling tool. The sampling pipe (60) penetrates into the subsea surface, and the subsea surface sample enters the inner liner pipe (502) in the core inner pipe mechanism. Meanwhile, the resistance of the surface sample entering the inner liner pipe (502) is transmitted to the outer pipe (30) connected with a ball valve and the protection support frame (70) through the second elastic fishing hook installation joint (212) and the spring clip pliers (206) of the inner pipe differential control mechanism (20). S2. Continue to lower the wire rope to operate the subsea surface pressure-maintaining sampling tool through the wire rope (201) until the wire rope (201) is relatively loose. At this time, the seabed completely bears the self-weight of the subsea surface pressure-maintaining sampling tool. The right-angle eccentric hook (101) of the eccentric hook connection mechanism (10) rotates downward through the eccentric gravity block to disengage the hook connection with the inner pipe differential control mechanism (20), and the inner pipe assembly can slide upward. S3. Drive the release pipe (205) through the wire rope (201) to move upward relative to the spring clip bracket (204), retract the spring clip pliers (206), and the spring clip pliers (206) are disengaged from the spring clip limit joint (301), driving the inner pipe differential control mechanism (20) and the core barrel mechanism (50) to move upward; When the stop spring (503) moves upward above the first ball valve (306), the lower end sealing ball valve (407) flips downward by 90 degrees under the push of the ball valve driving spring (403) to form a lower end seal; the wire rope (201), the first connecting rod (202), the cross bar (203), the spring clip bracket (204), the release pipe (205), the spring clip pliers (206), the first elastic pin (207), the second connecting rod (208), the accumulator (209), the sealing mechanism (210), the second elastic fishing hook (211) and the second elastic fishing hook mounting joint (212) S4. Continue to lift the wire rope (201) until the upper shoulder of the second elastic fishing hook mounting joint (212) contacts the reduced diameter shoulder at the upper part of the upper end sealing connecting pipe (302), and the sealing structure (210) enters the sealing surface of the upper end sealing connecting pipe (302) to form an upper end seal; At the same time, the upper part of the second elastic fishing hook (211) enters the reduced diameter section at the upper part of the upper end sealing connecting pipe (302), and the second elastic fishing hook (211) disengages from the fishing spear (501); the core barrel mechanism (50) freely falls under the action of gravity until the stop spring (503) contacts the lower end sealing ball valve (407) and stops falling; S5. Continue to lift the wire rope (201), and the wire rope operation enables the subsea surface pressure-retaining sampling tool to leave the seabed and reach the ship's deck. Close the first ball valve (306), the first ball valve (306) forms a second upper end seal relative to the lower end seal, open the first stop valve (305) to slowly relieve the high pressure inside the first connecting pipe (302) to atmospheric pressure, loosen the first opening and closing buckle (303), and extract the upper end sealing connecting pipe (302); S6. Connect the first ball valve (306) and the second ball valve (801) of the pressure-retaining transfer cabin (80) through the third quick-connect buckle (806). Open the second ball valve (801), open the second stop valve (803) and / or the third stop valve (804) to inject water into the pressure-resistant cabin (802) until the pressure inside the pressure-resistant cabin (802) is balanced with the pressure inside the lower end sealing connecting pipe (309) at one end of the first ball valve (306), then open the first ball valve (306) and turn it vertically to achieve the gravity sliding pressure-retaining transfer of the core barrel mechanism (50); S7. Close the second ball valve (801), open the first stop valve (305), relieve the pressure inside the lower end sealing connecting pipe (309) at one end of the first ball valve (306), and disassemble the third quick-connect sealing ring (805), so as to transfer the pressure-retaining sample to the pressure-retaining transfer cabin (80) for laboratory preservation while keeping the pressure unchanged.

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