A seabed drilling foundation for marine geological survey and a method of using the same

Abstract

The present application relates to the field of seabed geological sampling equipment, in particular to a seabed drilling base for marine geological survey and a use method thereof, comprising a base frame, a drill rod clamp, a pulley block and a counterweight arranged on the base frame, and a limiting assembly arranged on the drill rod clamp; the present application adjusts the landing point position of the drilling base through the pulley block, starts the drill rod clamp to fix the drill rod after deepening to the required position, and realizes convenient clamping and fixing; the driving motor is started to control the rotation of the transmission gear, the brake gear is rotated through the vertical gear, the threaded rod in the sleeve is translated along the length direction of the sleeve through the thread, the clamp slides under the limiting action of the sink block, the clamping tightness is improved, and the clamping range is controlled according to the radius of the drill rod through the clamping module, so that the drill rod of various sizes can be adapted.

Description

Technical Field

[0001] This invention relates to the field of seabed geological sampling equipment, specifically to a seabed drilling base for marine geological surveys and its usage method. Background Technology

[0002] Subsea drilling rigs are essential equipment for marine geological drilling and sampling. Their main functions include wellhead positioning, drill string guidance and stabilization, wellhead monitoring, and, depending on the specific work requirements, mounting other auxiliary instruments to facilitate geological sampling and surveying of the seabed. Subsea drilling rigs are integrated mechanical, hydraulic, optical, and electrical systems, consisting of a mechanical structure, a hydraulic system, and a control system.

[0003] Geological sampling is a routine survey method for obtaining marine geological information. It involves retrieving seabed sediments using a sampler and sending them for analysis. However, the sampling process causes significant disturbance to the soil. Samples lose water and pressure upon extraction, and the storage and handling of these samples after being removed from their original environment further disturbs them. Consequently, the samples may no longer accurately reflect the true properties of the soil and rock, affecting the analytical results. To overcome the disturbance caused by drilling sampling, in-situ soil and rock testing has become the dominant method in marine engineering surveys. Many countries have even included it as a mandatory component of marine surveys, leading to a series of international standards and industry norms, and resulting in substantial economic benefits.

[0004] However, existing seabed drilling base devices have poor clamping and fixing effects on drilling tools, are cumbersome to operate, have difficulty controlling the clamping force within a suitable range, and are not well-suited for various specifications of drill pipes, making it difficult to achieve the effect of ensuring sufficient clamping force without damaging the drilling tools. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a seabed drilling base for marine geological surveys and its usage method.

[0006] The technical solution of the present invention is: a seabed drilling base for marine geological survey, comprising a base frame, a drill pipe clamp, a pulley block and a counterweight disposed on the base frame, and a limiting component disposed on the drill pipe clamp; The base frame includes a first base and a second base disposed directly above the first base; the first base and the second base are connected by a connecting rod. The first base is provided with a first guide cone opening; the second base is provided with a second guide cone opening; the pulley block is provided on the first base; the counterweight is provided on the second base; The drill pipe clamp includes a ring mounted on the first base via a support rod, a first geared disc rotatably sleeved on the outside of the ring, and three clamping modules circumferentially arranged on the upper surface of the ring; a drive motor is mounted on the support rod, and a transmission gear meshing with the first geared disc is mounted on the output end of the drive motor; the upper surface of the first geared disc is provided with vertical teeth arranged in a ring. The clamping module includes a mounting plate disposed on the ring, a brake gear meshing with the vertical teeth, a sleeve disposed at the center of the brake gear, a threaded rod movably sleeved inside the sleeve, a clamp disposed at the end of the threaded rod, and a countersink block disposed on the mounting plate for limiting the clamp. The sleeve passes through the mounting plate and is rotatably connected to the mounting plate; the sleeve has internal threads; the threaded rod is threadedly connected to the inner wall of the sleeve.

[0007] Furthermore, the first guide cone includes a first cone, a guide tube disposed at the bottom of the first cone, and a second cone disposed at the bottom of the guide tube.

[0008] Note: The guide tube of the first guide cone is tapered at both the top and bottom, so it can pass smoothly whether the drill rod is raised or lowered.

[0009] Furthermore, the longitudinal section of the first conical opening is a frustum or a multi-faceted pyramid shape with a larger upper section and a smaller lower section; the second conical opening has the same structure as the first conical opening, and the first conical opening and the second conical opening are symmetrically arranged about the first base as an axis of symmetry; the second guide conical opening has the same structure as the first guide conical opening.

[0010] Note: The frustum or pyramidal structure of the guide cone facilitates the passage of the drill bit inside the base plate.

[0011] Furthermore, a rubber ring is fitted between the bottom of the second conical opening and the top of the clamp; the radius of the rubber ring is equal to the radius of the bottom surface of the second conical opening; the upper half of the rubber ring is fixedly connected to the upper surface of the first gear plate through a mounting plate and a connecting rod, and a brush is provided on the inner sidewall of the rubber ring.

[0012] Note: When the drill rod needs to be fixed, the first toothed disc rotates, which drives the rubber ring to rotate. The brush on the inner wall of the rubber ring removes mud from the surface of the drill rod, preventing the outer wall of the clamping section of the drill rod from slipping, increasing the clamping friction and improving the fastening effect.

[0013] Furthermore, the clamp is provided with a crank, and the end of the crank is provided with a push plate that contacts the outer wall of the rubber ring. The surface of the push plate is rotatably provided with a plurality of ball bearings; the mounting plate is located above the crank and the push plate. The sleeve contains a liquid bladder, and the rubber ring contains a cavity. The liquid bladder has an inlet and an outlet, each equipped with a corresponding one-way valve. The outlet of the liquid bladder is connected to the cavity of the rubber ring via a conduit. The rubber ring has multiple water spray holes, each connected to the cavity. Each water spray hole has a one-way valve.

[0014] Explanation: The push plate, which is in contact with the outer wall of the rubber ring, is fixed by the crank rod. The friction of the contact surface is reduced by the ball bearings. When the drill rod needs to be fixed, the first toothed disc rotates and the clamp extends. At the same time as the rubber ring rotates, the push plate squeezes the rubber ring, which enhances the mud removal effect on the outer wall of the drill rod. The relative movement of the casing and the threaded rod squeezes and expands the liquid bladder. The liquid in the liquid bladder is sprayed out through the water spray hole to remove mud from the surface of the rubber ring.

[0015] Furthermore, the limiting assembly includes a sleeve, a hollow cavity, and a rack; The clamp has a through groove along the direction of the corresponding threaded rod inside, and a sleeve rod is arranged in the through groove. A hollow cavity is provided inside the clamp, and the sleeve rod has a hollow structure. The rear side of the hollow cavity is connected to one end of the sleeve rod and is internally connected. Multiple movable columns are movably embedded on the surface of the hollow cavity, and a circular tube corresponding to each movable column is fixedly arranged on the inner surface of the hollow cavity. A piston plate is provided on the end of each movable column that extends into the hollow cavity, and the piston plate is slidably and sealingly connected to the inner wall of the circular tube. An annular protrusion is provided on the top side wall of each movable column. A return spring is provided between the annular protrusion and the hollow cavity. An anti-slip pad is provided on the top of the movable column. The other end of the sleeve is movably provided with a movable rod, one end of which is slidably and sealed to the inner wall of the sleeve through a piston block; the other end of the movable rod is fixedly connected to the rack.

[0016] Explanation: The clamp retracts to grip the drill pipe, squeezing the movable column and forcing the air inside the hollow cavity into the sleeve. This pushes the piston block, which in turn moves the rack via the movable rod, controlling the rotation of the second gear disc. Anti-slip pads prevent slippage on the contact surface with the drill pipe. After clamping, the movable column is reset by a return spring. Multiple movable rods ensure a tight fit with the outer wall of the drill pipe, enhancing the clamping stability.

[0017] Furthermore, the limiting assembly also includes a second gear plate, a limiting block, and a spring rod. The rack is meshed with the second gear plate, and the second gear plate is rotatably mounted on the side wall of the mounting plate. The two sides of the limiting block are respectively fixedly connected to the connecting rods provided on the side of the second gear plate by a spring rod. The spring rod has splines and spline grooves on its rod body and tube body for limiting the rotation of the rod body. The limiting block is movably engaged with the vertical tooth. The mounting plate has a cavity inside; a lever is provided on the rotating shaft of the second gear disk; a liquid storage tank is provided inside the mounting plate; and an extrusion member is provided on the notched end face of the mounting plate, which is connected to the liquid storage tank through a conduit; the liquid storage tank is filled with mechanical lubricant. The extrusion component includes a cylinder and a piston plate that is slidably sealed inside the cylinder. A connecting rod is vertically provided on the piston plate for penetrating the top surface of the cylinder. A spring is sleeved on the connecting rod located between the cylinder and the piston plate. A pressing plate is provided at the upper end of the connecting rod for pressing down with a lever to inflate the liquid storage chamber. A guide pipe is provided at the lower end of the liquid storage chamber for communicating with the inside of the sleeve. An air inlet is provided at the lower end of the side wall of the cylinder. A one-way valve is provided in the air inlet and the guide pipe.

[0018] Instructions: The movable rod drives the rack to move, controlling the rotation of the second gear plate, causing the connecting rod to swing. The rotation of the spring rod is limited by the spline, and the limiting block is engaged with the vertical tooth by the extension and retraction of the spring rod. The rotation of the second gear plate drives the swing of the lever, which can intermittently squeeze the pressing plate, compressing the space inside the cylinder. The mechanical lubricant inside the liquid storage tank is squeezed by air pressure and sprayed out along the guide tube to lubricate the rotating structure of the sleeve. When the lever returns to its original position, the pressing plate is released. The pressing plate rebounds under the action of the spring, expanding the space inside the cylinder. Gas is then drawn into the cylinder through the air inlet.

[0019] The present invention also provides a method for using the aforementioned seabed drilling base, the steps of which are as follows: S1. Adjust the landing point of the drilling base plate by means of pulley block, accelerate the descent of the drilling base plate by means of counterweight to enhance the stability of the drilling base plate, insert the drill rod into the first guide cone and the second guide cone in sequence, and start the drill rod clamp to fix and hold the drill rod after it has been inserted to the required position. S2. Start the drive motor to control the transmission gear to rotate, drive the first gear plate to rotate, drive the brake gear to rotate through the vertical teeth, and make the casing rotate. The threaded rod inside the casing cannot rotate because the clamp at the end is limited, so it moves along the length of the casing through the thread. The clamp slides under the limiting action of the countersink block. The three clamping modules clamp the drill rod from three directions. S3. The clamping module controls the clamping range according to the radius of the drill rod. When the set value of the clamp extension is reached, the drive motor is turned off, the brake gear stops rotating, and the first toothed plate is limited by the limit component. When it is necessary to cancel the clamping, the limit component is opened, the drive motor reverses, thereby driving the threaded rod to retract and the clamp is retracted.

[0020] The beneficial effects of this invention are: (1) The present invention adjusts the landing point of the drilling base plate by means of pulley block, accelerates the descent of the drilling base plate by means of counterweight, enhances the stability of the drilling base plate, and facilitates the descent and ascent of the drill rod by means of first guide cone and second guide cone. After reaching the required position, the drill rod clamp is activated to fix and hold the drill rod, thus realizing convenient clamping and fixing.

[0021] (2) The present invention controls the transmission gear to rotate by turning on the drive motor, which drives the first gear plate to rotate. The brake gear is driven to rotate by the vertical teeth. The threaded rod inside the casing moves along the length of the casing by the thread. The clamp slides under the limiting action of the countersink block. The three clamping modules clamp the drill rod from three directions, which improves the clamping tightness. The clamping module controls the clamping range according to the radius of the drill rod, which can adapt to drill rods of various sizes and specifications.

[0022] (3) The present invention limits the first toothed disc by limiting the limiting component. When it is necessary to cancel the clamping, the limiting component is opened, the drive motor is reversed, thereby driving the threaded rod to retract and the clamp is retracted. The operation is simple and controllable, and the clamping and releasing of the drill rod can be achieved quickly. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the drill pipe clamp of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of the limiting component in Embodiment 1 of the present invention; Figure 4 This is a cross-sectional view of the limiting component of Embodiment 1 of the present invention; Figure 5 This is a cross-sectional view of the movable column in Embodiment 1 of the present invention; Figure 6 This is a cross-sectional view of the mounting plate of Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention; Figure 8 This is a schematic diagram of the support plate structure in Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the push plate structure in Embodiment 2 of the present invention; Among them, 1-base plate frame, 11-first base, 111-first guide cone, 1111-first cone, 1112-guide tube, 1113-second cone, 12-second base, 121-second guide cone, 2-drill pipe clamp, 21-ring, 22-first gear plate, 221-transmission gear, 222-rubber ring, 2221-support plate, 23-clamping module, 231-mounting plate, 2311-liquid storage tank, 2312-cylinder body, 231 3-Guide pipe, 232-Brake gear, 233-Sleeve, 234-Threaded rod, 235-Clamping clamp, 2351-Crank rod, 2352-Push plate, 236-Sinking block, 3-Limiting assembly, 31-Sleeve rod, 311-Moving rod, 3111-Piston block, 32-Hollow cavity, 321-Moving column, 3211-Reset spring, 3212-Anti-slip pad, 33-Rack, 34-Second gear plate, 341-Pulley, 35-Limiting block, 36-Spring rod. Detailed Implementation

[0024] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0025] Example 1 like Figure 1 The seabed drilling base plate shown includes a base plate frame 1, a drill pipe clamp 2, a pulley block and a counterweight set on the base plate frame 1, and a limiting component 3 set on the drill pipe clamp 2. The base frame 1 includes a first base 11 and a second base 12 disposed directly above the first base 11; the first base 11 and the second base 12 are connected by a connecting rod. A first guide cone 111 is provided on the first base 11; a second guide cone 121 is provided on the second base 12; a pulley block is provided on the first base 11; and a counterweight is provided on the second base 12. The first guide cone 111 includes a first cone 1111, a guide tube 1112 disposed at the bottom of the first cone 1111, and a second cone 1113 disposed at the bottom of the guide tube 1112; The longitudinal section of the first cone 1111 is a frustum or a multi-faceted pyramid shape with a larger upper section and a smaller lower section; the second cone 1113 has the same structure as the first cone 1111, and the first cone 1111 and the second cone 1113 are symmetrically arranged about the first base 11 as the axis of symmetry; the second guide cone 121 has the same structure as the first guide cone 111. like Figure 2As shown, the drill pipe clamp 2 includes a ring 21 mounted on a first base 11 via a support rod, a first gear 22 slidably sleeved on the outside of the ring 21, and three clamping modules 23 circumferentially mounted on the upper surface of the ring 21; a drive motor is mounted on the support rod, and a transmission gear 221 meshing with the first gear 22 is mounted on the output end of the drive motor; the upper surface of the first gear 22 is provided with vertical teeth distributed in an annular pattern. The clamping module 23 includes a mounting plate 231 disposed on the ring 21, a brake gear 232 meshing with the vertical teeth, a sleeve 233 disposed at the center of the brake gear 232, a threaded rod 234 movably sleeved inside the sleeve 233, a clamp 235 disposed at the end of the threaded rod 234, and a countersunk block 236 disposed on the mounting plate 231 for limiting the clamp 235. The sleeve 233 passes through the mounting plate 231 and is rotatably connected to the mounting plate 231; the sleeve 233 has internal threads; the threaded rod 234 is threadedly connected to the inner wall of the sleeve 233. like Figure 2 , 3 As shown in Figures 4 and 5, the limiting assembly 3 includes a sleeve 31, a hollow cavity 32, and a rack 33; like Figure 3 , 4 As shown in Figure 5, a through groove is provided inside the clamp 235 along the direction of the corresponding threaded rod 234. A sleeve rod 31 is provided in the through groove. A hollow cavity 32 is provided inside the clamp 235. The sleeve rod 31 has a hollow structure inside. The rear side of the hollow cavity 32 is connected to one end of the sleeve rod 31 and is internally connected. Multiple movable columns 321 are movably embedded on the surface of the hollow cavity 32. A round tube corresponding to each movable column 321 is fixedly provided on the inner surface of the hollow cavity 32. A piston plate is provided on the end of the movable column 321 that extends into the hollow cavity 32. The piston plate is slidably sealed to the inner wall of the round tube. An annular protrusion is provided on the top side wall of the movable column 321. A return spring 3211 is provided between the annular protrusion and the hollow cavity 32. An anti-slip pad 3212 is provided on the top of the movable column 321. The other end of the sleeve rod 31 is movably provided with a movable rod 311. One end of the movable rod 311 is slidably and sealed to the inner wall of the sleeve rod 31 through a piston block 3111; the other end of the movable rod 311 is fixedly connected to the rack 33. like Figure 6 As shown, the limiting assembly 3 also includes a second gear 34, a limiting block 35, and a spring rod 36. The rack 33 is meshed with the second gear 34. The second gear 34 is rotatably mounted on the side wall of the mounting plate 231. The two sides of the limiting block 35 are respectively fixedly connected to the connecting rods provided on the side of the second gear 34 through a spring rod 36. The rod body and tube body of the spring rod 36 are respectively provided with splines and spline grooves for limiting the rotation of the rod body. The limiting block 35 is movably engaged with the vertical tooth. The mounting plate 231 has a cavity inside; a lever 341 is provided on the rotating shaft of the second gear disk 34; a liquid storage tank 2311 is provided inside the mounting plate 231; and a pressing element is provided on the notched end face of the mounting plate 231, which is connected to the liquid storage tank 2311 through a conduit; the liquid storage tank 2311 is filled with mechanical lubricant. The extrusion component includes a cylinder 2312 and a piston plate that is slidably sealed inside the cylinder 2312. A connecting rod is vertically provided on the piston plate for penetrating the top surface of the cylinder 2312. A spring is sleeved on the connecting rod located between the cylinder 2312 and the piston plate. A pressing plate is provided at the upper end of the connecting rod for pressing down with the lever 341 to inflate the liquid storage tank 2311. A guide pipe 2313 for communicating with the inside of the sleeve 233 is provided at the lower end of the side wall of the cylinder 2312. A gas inlet is provided at the lower end of the gas inlet and the guide pipe. A one-way valve is provided in the gas inlet and the guide pipe. The one-way valve of the gas inlet is a commercially available one-way valve for one-way air intake, and the one-way valve of the guide pipe is a commercially available one-way valve for one-way air exhaust. The piston plate, piston block 3111 and piston plate are all commercially available pistons.

[0026] It should be noted that this embodiment also includes a PLC controller and a power supply. The PLC controller, power supply, motor, drive motor, clamp 235, check valve, and mechanical lubricant are all commercially available products and will not be described in detail here.

[0027] Example 2 The method for using the seabed drilling base in Example 1 for seabed drilling is as follows: S1. Adjust the landing point of the drilling base plate by means of the pulley block, accelerate the descent of the drilling base plate by means of the counterweight, enhance the stability of the drilling base plate, insert the drill rod into the first guide cone 111 and the second guide cone 121 in sequence, and start the drill rod clamp 2 to fix and hold the drill rod after it has been inserted to the required position. S2. Turn on the drive motor to control the transmission gear 221 to rotate, which drives the first gear plate 22 to rotate. The vertical teeth drive the brake gear 232 to rotate, causing the casing 233 to rotate. The threaded rod 234 inside the casing 233 cannot rotate because the clamp 235 at the end is limited. Therefore, it moves along the length of the casing through the thread. The clamp 235 slides under the limiting action of the countersink block 236. The three clamping modules 23 clamp the drill rod from three directions. S3. The clamping module 23 controls the clamping range according to the radius of the drill rod. When the set value of the clamp 235 extension is reached, the drive motor is turned off, the brake gear 232 stops rotating, and the first toothed disc 22 is limited by the limit component 3. S4. Open the limiting component 3, the clamp retracts to clamp the drill rod, squeeze the movable column 321, and squeeze the air inside the hollow cavity 32 into the sleeve rod 31. Push the piston block 3111 to drive the rack 33 to move through the movable rod 311, control the rotation of the second gear plate 34, and prevent slippage on the contact surface with the drill rod through the anti-slip pad 3212. After clamping, the movable column 321 is reset by the return spring 3211. The multiple movable rods 311 can achieve a tight fit with the outer wall of the drill rod, and strengthen the clamping tightness. The movable rod 311 drives the rack 33 to move, controlling the rotation of the second gear 34, causing the connecting rod to swing. The rotation of the spring rod 36 is limited by the spline, and the movement position of the limiting block 35 is compensated by the spring rod 36. The limiting block 35 is engaged in the vertical tooth by the extension and retraction of the spring rod 36. The rotation of the second gear 34 drives the lever 341 to swing, which can intermittently squeeze the pressing plate. The cylinder 2312 pressurizes the liquid storage chamber 2311. Under the action of air pressure, the mechanical lubricant inside the liquid storage chamber 2311 is sprayed out along the guide pipe 2313 to lubricate the rotating structure of the sleeve 233. When the lever 341 is reset, the pressing plate is released. The pressing plate rebounds by the action of the spring, causing the piston plate to move up and draw gas into the cylinder 2312 through the air inlet for gas compensation.

[0028] Example 3 Unlike Example 1, as Figure 7 , 8 As shown, a rubber ring 222 is fitted between the bottom of the second conical opening 1113 and the top of the clamp 235; the radius of the rubber ring 222 is equal to the radius of the bottom surface of the second conical opening 1113; the upper half of the rubber ring 222 is fixedly connected to the upper surface of the first gear plate 22 through the support plate 2221 and the connecting rod; a brush is provided on the inner side wall of the rubber ring 222. The clamp 235 is provided with a crank 2351, and the end of the crank 2351 is provided with a push plate 2352 that contacts the outer wall of the rubber ring 222. Several balls are rotatably provided on the surface of the push plate 2352; the support plate 2221 is located above the crank 2351 and the push plate 2352. like Figure 9 As shown, the sleeve 233 has a liquid bladder inside, and the rubber ring 222 has a cavity inside. The liquid bladder has an inlet and an outlet. The inlet is equipped with a commercially available one-way valve for one-way liquid inflow, and the outlet is equipped with a commercially available one-way valve for one-way liquid outflow. The outlet of the liquid bladder is connected to the cavity of the rubber ring 222 through a conduit. The rubber ring 222 has multiple water spray holes. Each of the multiple water spray holes is connected to the cavity. Each of the multiple water spray holes is equipped with a one-way valve.

[0029] Example 4 The difference from Example 2 is that the method of using the seabed drilling base of Example 3 for seabed drilling is as follows: S5. When the drill rod needs to be fixed, the first toothed disc 22 rotates, driving the rubber ring 222 to rotate. The brush on the inner wall of the rubber ring 222 removes mud from the surface of the drill rod, preventing slippage on the outer wall of the clamping section of the drill rod, increasing clamping friction, and improving the fastening effect. The push plate that contacts the outer wall of the rubber ring is fixed by the curved rod, and the friction of the contact surface is reduced by the ball bearings. When the drill rod needs to be fixed, the first toothed disc rotates, the clamp extends, and the push plate squeezes the rubber ring while the rubber ring rotates, enhancing the mud removal effect on the outer wall of the drill rod. The relative movement of the sleeve 233 and the threaded rod 234 squeezes and expands the liquid bladder, and the liquid in the liquid bladder is sprayed out through the water spray hole to intermittently remove mud from the surface of the rubber ring.

Claims

1. A seabed drilling base for marine geological surveys, characterized in that, It includes a base frame (1), a drill pipe clamp (2), a pulley block and a counterweight disposed on the base frame (1), and a limiting component (3) disposed on the drill pipe clamp (2). The base frame (1) includes a first base (11) and a second base (12) disposed directly below the first base (11); the first base (11) and the second base (12) are connected by a connecting rod; The first base (11) is provided with a first guide cone (111); the second base (12) is provided with a second guide cone (121); the pulley block is provided on the first base (11); the counterweight is provided on the second base (12); the first guide cone (111) includes a first cone (1111), a guide tube (1112) provided at the bottom of the first cone (1111), and a second cone (1113) provided at the bottom of the guide tube (1112); The drill pipe clamp (2) includes a ring (21) mounted on the first base (11) via a support rod, a first gear disc (22) rotatably sleeved on the outside of the ring (21), and three clamping modules (23) circumferentially mounted on the upper surface of the ring (21); a drive motor is mounted on the support rod, and a transmission gear (221) meshing with the first gear disc (22) is mounted on the output end of the drive motor; the upper surface of the first gear disc (22) is provided with vertical teeth distributed in an annular pattern; The clamping module (23) includes a mounting plate (231) disposed on the ring (21), a brake gear (232) meshing with the vertical teeth, a sleeve (233) disposed at the center of the brake gear (232), a threaded rod (234) movably sleeved inside the sleeve (233), a clamp (235) disposed at the end of the threaded rod (234), and a countersink block (236) disposed on the mounting plate (231) for limiting the clamp (235). The sleeve (233) passes through the mounting plate (231) and is rotatably connected to the mounting plate (231); the sleeve (233) is provided with threads inside; the threaded rod (234) is threadedly connected to the inner wall of the sleeve (233); A rubber ring (222) is fitted between the bottom of the second conical opening (1113) and the top of the clamp (235); the radius of the rubber ring (222) is equal to the radius of the bottom surface of the second conical opening (1113); the upper half of the rubber ring (222) is fixedly connected to the upper surface of the first gear plate (22) through a support plate (2221) and a connecting rod; and a brush is provided on the inner side wall of the rubber ring (222). The clamp (235) is provided with a crank (2351), and the end of the crank (2351) is provided with a push plate (2352) that contacts the outer wall of the rubber ring (222). A plurality of balls are rotatably provided on the surface of the push plate (2352); the support plate (2221) is located above the crank (2351) and the push plate (2352); The sleeve (233) has a liquid bladder inside, and the rubber ring (222) has a cavity inside. The liquid bladder has an inlet and an outlet, and each inlet and outlet is equipped with a corresponding one-way valve. The outlet of the liquid bladder is connected to the cavity of the rubber ring (222) through a conduit. The rubber ring (222) has multiple water spray holes. Each of the multiple water spray holes is connected to the cavity. Each of the multiple water spray holes is equipped with a one-way valve.

2. The seabed drilling base for marine geological surveys as described in claim 1, characterized in that, The longitudinal section of the first cone (1111) is a frustum or a multi-faceted pyramid with a larger upper section and a smaller lower section; the second cone (1113) has the same structure as the first cone (1111), and the first cone (1111) and the second cone (1113) are symmetrically arranged about the first base (11) as the axis of symmetry; the second guide cone (121) has the same structure as the first guide cone (111).

3. The seabed drilling base for marine geological surveys as described in claim 1, characterized in that, The limiting component (3) includes a sleeve (31), a hollow cavity (32), and a rack (33); The clamp (235) has a through groove along the direction of the corresponding threaded rod (234) inside, and a sleeve rod (31) is provided in the through groove. The clamp (235) has a hollow cavity (32) inside, and the sleeve rod (31) has a hollow structure inside. The rear side of the hollow cavity (32) is connected to one end of the sleeve rod (31) and is internally connected. Multiple movable columns (321) are movably embedded on the surface of the hollow cavity (32). A round tube corresponding to each movable column (321) is fixedly provided on the inner surface of the hollow cavity (32). A piston plate is provided on one end of the movable column (321) that extends into the hollow cavity (32), and the piston plate is slidably sealed to the inner wall of the round tube. An annular protrusion is provided on the top side wall of the movable column (321). A return spring (3211) is provided between the annular protrusion and the hollow cavity (32). An anti-slip pad (3212) is provided on the top of the movable column (321). The other end of the sleeve (31) is movably provided with a movable rod (311), one end of the movable rod (311) is slidably sealed to the inner wall of the sleeve (31) through a piston block (3111); the other end of the movable rod (311) is fixedly connected to the rack (33).

4. The seabed drilling base for marine geological surveys as described in claim 3, characterized in that, The limiting component (3) also includes a second gear plate (34), a limiting block (35), and a spring rod (36). The rack (33) meshes with the second gear plate (34). The second gear plate (34) is rotatably mounted on the side wall of the mounting plate (231). The limiting block (35) is fixedly connected to the connecting rods on the side of the second gear plate (34) by a spring rod (36) on each side. The spring rod (36) has splines and spline grooves on its rod body and tube body for limiting the rotation of the rod body. The limiting block (35) is movably engaged with the vertical tooth. The mounting plate (231) has a cavity inside; a lever (341) is provided on the rotating shaft of the second gear disc (34); a liquid storage tank (2311) is provided inside the mounting plate (231); and an extrusion member is provided on the notched end face of the mounting plate (231) through a conduit to communicate with the liquid storage tank (2311); the liquid storage tank (2311) is filled with mechanical lubricant. The extrusion component includes a cylinder (2312) and a piston plate that is slidably sealed inside the cylinder (2312). A connecting rod for penetrating the top surface of the cylinder (2312) is provided vertically on the piston plate. A spring is sleeved on the connecting rod located between the cylinder (2312) and the piston plate. A pressing plate is provided at the upper end of the connecting rod for pressing down with the lever (341) to inflate the liquid storage tank (2311). A guide pipe (2313) for communicating with the inside of the sleeve (233) is provided at the lower end of the side wall of the cylinder (2312). A gas inlet is provided at the lower end of the side wall of the cylinder (2312). A one-way valve is provided in the gas inlet and the guide pipe, respectively.

5. The method of using the subsea drilling base according to any one of claims 1 to 4, characterized in that, The steps are as follows: S1. Adjust the landing point of the drilling base plate by means of the pulley block, accelerate the descent of the drilling base plate by means of the counterweight, enhance the stability of the drilling base plate, and insert the drill rod into the first guide cone (111) and the second guide cone (121) in sequence. After reaching the required position, start the drill rod clamp (2) to fix and hold the drill rod. S2. Turn on the drive motor to control the transmission gear (221) to rotate, drive the first gear plate (22) to rotate, drive the brake gear (232) to rotate through the vertical teeth, and make the casing (233) rotate. The threaded rod (234) inside the casing (233) cannot rotate because the clamp (235) at the end is limited. Thus, it moves along the length of the casing through the thread. The clamp (235) slides under the limiting action of the countersink block (236). The three clamping modules (23) clamp the drill rod from three directions. S3. The clamping module (23) controls the clamping range according to the radius of the drill rod. When the set value of the clamp (235) extension is reached, the drive motor is turned off, the brake gear (232) stops rotating, and the first toothed disc (22) is limited by the limit component (3). When it is necessary to cancel the clamping, the limit component (3) is opened, the drive motor reverses, thereby driving the threaded rod (234) to retract, and the clamp (235) is retracted.

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