A seabed drilling device for marine geological survey

Abstract

The present invention discloses a marine geological survey seabed drilling device, which relates to the technical field of underwater survey sampling operations. The marine geological survey seabed drilling device comprises an exploration hull for exploration, a drill rod for exploration drilling, a casing for partitioning during exploration drilling, and an underwater robot for assisting exploration positioning, wherein a drill bit is installed at the front end of the drill rod. In the process of the drill rod being lowered, transported, and drilled, the present invention promotes one side of the support plate to abut against the outer side of the drill rod through the mutual cooperation of the support plate and the transmission assembly, and supports the drill rod during the descending process through the abutment between the support plate and the drill rod. Moreover, since the support plate descends synchronously with the descent of the drill rod, the support plate always maintains support at a position relatively forward of the drill rod, reduces the amplitude of the swinging during the drilling and descending process of the drill rod, further avoids the problems of hole collapse or penetration on the casing, and ensures the safety and effectiveness during the drilling process.

Description

Technical Field

[0001] This invention relates to the field of underwater exploration and sampling technology, specifically to a marine geological exploration seabed drilling device. Background Technology

[0002] The marine geological exploration subsea drilling device is an underwater marine geological exploration equipment. During the geological exploration process, the drill pipe is transported and driven by the exploration vessel to different locations for exploration and sampling. During the drilling process, multiple sets of casings are sequentially deployed into the wellbore to protect the well wall. As the drill pipe descends and is transported inside the casing, the action of the ocean currents and the length of the drill pipe itself can cause it to swing. During the swinging process, the drill bit at the front end of the drill pipe may collide with the inner wall of the casing, increasing the risk of casing collapse or penetration, and affecting the safety and effectiveness of the drilling process. Therefore, we propose a marine geological exploration subsea drilling device. Summary of the Invention

[0003] The purpose of this invention is to provide a marine geological exploration seabed drilling device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a marine geological exploration seabed drilling device, comprising an exploration vessel hull for exploration, a drill rod for exploration drilling, a casing for isolation during exploration drilling, and an underwater robot for assisting exploration positioning. A drill bit is mounted on the front end of the drill rod. The exploration vessel hull is equipped with a drive assembly for hoisting and driving the drill rod, and a deployment assembly for assisting in casing deployment. The device also includes an operating cylinder fixed to the lower end of the underwater robot. The underwater robot has a through hole for assisting in the transport of the drill rod and casing. The operating cylinder and the through hole are concentrically arranged. The upper end of the underwater robot is equipped with a device for assisting in... The positioning assembly for positioning and conveying drill rod and casing includes two sets of C-shaped plates inside the operating cylinder, which are connected by a connecting assembly. The two sets of C-shaped plates are arranged in a ring shape after connection. Multiple support plates are provided on the inner side of the C-shaped plates to assist in supporting the descending and conveying drill rod. A rubber pad is provided on the side of the support plate that abuts against the drill rod. A transmission assembly for elastic transmission of the support plate is provided on the C-shaped plates. A moving assembly for controlling the movement of the C-shaped plates is provided on the outer side of the operating cylinder. An annular plate is sleeved on the outer side of the drill rod for abutting against the upper end of the support plate. The annular plate and the support plate are held in abutting connection by magnetic means.

[0005] Preferably, the transmission assembly includes a mounting cylinder fixed to a C-shaped plate, a transmission rod slidably connected to the mounting cylinder, one end of the transmission rod being fixed to one side of a support plate, and the other end of the transmission rod being located on the outer side of the C-shaped plate and fixed to a transmission plate. A first spring is sleeved on the outer side of the mounting cylinder, the first spring abutting against the outer side of the C-shaped plate and the transmission plate. A rolling assembly for assisting sliding inside the protective cylinder is provided on the side of the transmission plate away from the C-shaped plate.

[0006] Preferably, the lower end of the transmission plate is provided with an inclined surface for abutting against the upper end of the protective sleeve, so that the transmission plate moves toward the C-shaped plate in a contraction motion.

[0007] Preferably, the rolling assembly includes a spherical groove formed on one side of the transmission plate, and a first ball is rotatably connected to the spherical groove.

[0008] Preferably, the connecting assembly includes iron blocks and magnetic blocks fixed at both ends of the C-shaped plate, and the two sets of C-shaped plates are arranged alternately with respect to the iron blocks and magnetic blocks.

[0009] Preferably, the moving component includes two sets of slides slidably connected to the operating cylinder, and U-shaped brackets for engaging with the C-shaped plate are fixed on the two sets of slides. A pushing component for pushing the two sets of slides and a guiding component for guiding the pushing process are provided on the outside of the operating cylinder.

[0010] Preferably, the pushing assembly includes a mounting base disposed on the outside of the operating cylinder, one end of the two sets of slides being fixed to the mounting base, a threaded rod being rotatably connected to the mounting base, a threaded tube being threadedly engaged with the threaded rod, one end of the threaded tube being fixed to the outside of the operating cylinder, and a drive motor for driving the threaded rod being mounted on the mounting base.

[0011] Preferably, the guide assembly includes a sleeve fixed to the outside of the operating cylinder, a guide rod slidably connected to the sleeve, and one end of the guide rod being fixed to the transmission plate.

[0012] Preferably, multiple sets of positioning components are provided on the upper end of the underwater robot, and the multiple sets of positioning components are evenly distributed around the through hole. The positioning component includes a U-shaped frame fixed to the upper end of the underwater robot, a mounting shaft rotatably connected to the U-shaped frame, a fixed cylinder fixed on the mounting shaft, and a second ball bearing rotatably connected to the front end of the fixed cylinder for supporting the conveyed drill rod and the outer side of the casing. The U-shaped frame is provided with an elastic component for elastic support of the fixed cylinder.

[0013] Preferably, the elastic component includes a rotating shaft rotatably connected to the U-shaped frame, a connecting cylinder is provided below the fixed cylinder, one end of the connecting cylinder is rotatably connected to the rotating shaft, a sliding plate is slidably connected to the connecting cylinder, a connecting rod is slidably connected to the front end of the connecting cylinder, one end of the connecting rod is fixed to the sliding plate, the other end of the connecting rod is rotatably connected to the outside of the fixed cylinder, and a second spring for connecting the sliding plate is provided inside the connecting cylinder.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] During the descent and drilling process of the drill rod, this invention utilizes the cooperation between the support plate and the transmission assembly to push one side of the support plate against the outer side of the drill rod. This abutment between the support plate and the drill rod provides support for the drill rod during its descent. Furthermore, because the support plate descends synchronously with the drill rod, it maintains a position that supports the relatively forward end of the drill rod, reducing the amplitude of swaying during the descent and further preventing problems such as hole collapse or penetration on the casing, thus ensuring safety and effectiveness during the drilling process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall external structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the underwater robot structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the U-shaped frame structure of the present invention;

[0019] Figure 4 This is a schematic diagram of the positioning component structure of the present invention;

[0020] Figure 5 This is a schematic diagram of the elastic component structure of the present invention;

[0021] Figure 6 This is a schematic diagram of the drill pipe structure of the present invention;

[0022] Figure 7 This is a schematic diagram of the operating cylinder structure of the present invention;

[0023] Figure 8 This is a schematic diagram of the moving component, pushing component, and guiding component of the present invention;

[0024] Figure 9 This is a schematic diagram of the transmission component structure of the present invention;

[0025] Figure 10 This is a schematic diagram of the connection component structure of the present invention;

[0026] Figure 11This is a schematic diagram showing the drill pipe in a supporting state as it descends inside the casing.

[0027] Figure 12 This is a schematic diagram showing the support state of the drill pipe during descent inside different casings.

[0028] In the diagram: 101. Exploration vessel hull; 102. Underwater robot; 103. Drill pipe; 104. Casing; 2. Operating cylinder; 3. C-shaped plate; 401. Iron block; 402. Magnetic block; 5. Support plate; 601. Mounting cylinder; 602. Transmission rod; 603. Transmission plate; 604. First spring; 7. Inclined surface; 801. Spherical groove; 802. First ball bearing; 9. Annular plate; 1001. Slide carriage; 1002 1101. U-shaped bracket; 1102. Mounting base; 1103. Threaded rod; 1104. Threaded tube; 1105. Drive motor; 1201. Sleeve; 1202. Guide rod; 1301. U-shaped bracket; 1302. Mounting shaft; 1303. Fixed cylinder; 1304. Second ball bearing; 1401. Rotating shaft; 1402. Connecting cylinder; 1403. Slide plate; 1404. Connecting rod; 1405. Second spring. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1

[0031] Please see Figures 1-12 The diagram shows a marine geological exploration seabed drilling device, including an exploration vessel 101 for exploration, a drill rod 103 for exploration drilling, a casing 104 for isolation during exploration drilling, and an underwater robot 102 for assisting exploration positioning. A drill bit is installed at the front end of the drill rod 103. The exploration vessel 101 is equipped with a drive assembly for hoisting and driving the drill rod 103, and a deployment assembly for assisting the deployment of the casing 104.

[0032] It is worth noting here that the drive assembly and deployment assembly on the exploration vessel hull 101 are conventional technical means in the exploration process and are considered as prior art in this technical specification. Their internal structure and working principle will not be further explained.

[0033] It should be noted here that during the sequential delivery of the protective casing 104, in order to facilitate the delivery of the protective casing 104 through the already delivered protective casing 104, the inner diameter of the protective casing 104 is continuously reduced as the protective casing 104 is continuously delivered.

[0034] It also includes an operating cylinder 2 fixed to the lower end of the underwater robot 102. The underwater robot 102 is provided with a through hole for assisting the conveying of the drill rod 103 and the casing 104. The operating cylinder 2 is concentrically arranged with the through hole. The upper end of the underwater robot 102 is provided with a positioning component for assisting the positioning and conveying of the drill rod 103 and the casing 104. The inside of the operating cylinder 2 is provided with two sets of C-shaped plates 3. The two sets of C-shaped plates 3 are connected by a connecting component. The two sets of C-shaped plates 3 are arranged in a ring shape after connection. The inner side of the C-shaped plates 3 is provided with multiple sets of support plates 5 for assisting the support of the descending and conveying drill rod 103. The side of the support plate 5 that abuts against the drill rod 103 is provided with a rubber pad.

[0035] It is worth noting here that the rubber pads facilitate flexible mutual support during the support process, preventing the transmission plate 603, transmission rod 602, and support plate 5 from getting stuck between the casing 104 and the drill rod 103.

[0036] The C-shaped plate 3 is provided with a transmission component for elastic transmission of the support plate 5. The outer side of the operating cylinder 2 is provided with a moving component for controlling the movement of the C-shaped plate 3. The outer side of the drill rod 103 is sleeved with an annular plate 9 for abutting and transmitting with the upper end of the support plate 5. After the annular plate 9 abuts with the support plate 5, it is kept in abutting connection by magnetic means.

[0037] It should be noted that during the descent and drilling of the drill rod 103, the support plate 5 and the transmission assembly work together to push one side of the support plate 5 against the outer side of the drill rod 103. Through the action of the support plate 5 against the drill rod 103, the drill rod 103 is supported during the descent. Since the support plate 5 descends synchronously with the drill rod 103, it always maintains a position supporting the relatively forward end of the drill rod 103, reducing the amplitude of the swing of the drill rod 103 during the drilling and descent process. This further avoids problems such as hole collapse or penetration on the casing 104, ensuring the safety and effectiveness of the drilling process.

[0038] Preferably, the transmission assembly includes a mounting cylinder 601 fixed on the C-shaped plate 3, a transmission rod 602 slidably connected to the mounting cylinder 601, one end of the transmission rod 602 being fixed to one side of the support plate 5, and the other end of the transmission rod 602 being located on the outer side of the C-shaped plate 3 and fixed with a transmission plate 603. A first spring 604 is sleeved on the outer side of the mounting cylinder 601, and the first spring 604 abuts against the outer side of the C-shaped plate 3 and the transmission plate 603. A rolling assembly for assisting sliding inside the protective cylinder 104 is provided on the side of the transmission plate 603 away from the C-shaped plate 3.

[0039] It should be noted that during the descent of the C-shaped plate 3, the transmission plate 603 moves synchronously. During the descent of the transmission plate 603, the inclined surface 7 on the transmission plate 603 abuts against the upper end of the casing 104, driving the transmission plate 603 to retract towards the C-shaped plate 3. During the retraction of the transmission plate 603, the transmission rod 602 is pushed to slide on the mounting cylinder 601 and one side of the support plate 5 abuts against the outer side of the drill rod 103.

[0040] Preferably, the lower end of the transmission plate 603 is provided with an inclined surface 7 for abutting against the upper end of the protective sleeve 104 to cause the transmission plate 603 to retract towards the C-shaped plate 3.

[0041] It should be noted here that the inclined surface 7 facilitates abutment against the upper end of the protective sleeve 104, allowing the transmission plate 603 to retract and retract.

[0042] Preferably, the rolling assembly includes a spherical groove 801 formed on one side of the transmission plate 603, and a first ball bearing 802 is rotatably connected to the spherical groove 801;

[0043] It should be noted that during the downward movement of the transmission plate 603, the inclined surface 7 on the transmission plate 603 abuts against the upper end of the protective cylinder 104, driving the transmission plate 603 to retract towards the C-shaped plate 3. After the transmission plate 603 retracts, the first spring 604 pushes the first ball 802 on one side of the transmission plate 603 to abut against the inner wall of the protective cylinder 104. The rotation of the first ball 802 inside the spherical groove 801 facilitates the sliding of the transmission plate 603 inside the protective cylinder 104.

[0044] Preferably, the connecting assembly includes iron blocks 401 and magnetic blocks 402 fixed at both ends of the C-shaped plate 3, and the two sets of C-shaped plates 3 are staggered with respect to the iron blocks 401 and magnetic blocks 402.

[0045] It should be noted here that the iron block 401 and the magnetic block 402 facilitate the quick connection and separation between the two sets of C-shaped plates 3.

[0046] Preferably, the moving component includes two sets of slides 1001 slidably connected to the operating cylinder 2, and a U-shaped bracket 1002 for engaging with the C-shaped plate 3 is fixed on the two sets of slides 1001. A pushing component for pushing the two sets of slides 1001 and a guiding component for guiding during the pushing process are provided on the outside of the operating cylinder 2.

[0047] It should be noted that during the delivery and transport of the protective casing 104, the sliding carriage 1001 is driven to move towards the outside of the operating cylinder 2 by the pushing component and the guiding component. During the movement of the sliding carriage 1001, the C-shaped plate 3 is driven to move synchronously by the U-shaped bracket 1002. By moving the two sets of C-shaped plates 3, the distance between the two sets of C-shaped plates 3 is increased, so as to avoid the interference of the support plates 5 on the C-shaped plates 3 with the delivery of the protective casing 104.

[0048] Preferably, the pushing assembly includes a mounting base 1101 disposed on the outside of the operating cylinder 2, one end of two sets of slides 1001 being fixed to the mounting base 1101, a threaded rod 1102 being rotatably connected to the mounting base 1101, a threaded tube 1103 being threadedly engaged with the threaded rod 1102, one end of the threaded tube 1103 being fixed to the outside of the operating cylinder 2, and a drive motor 1104 for driving the threaded rod 1102 being mounted on the mounting base 1101; the guiding assembly includes a sleeve 1201 fixed to the outside of the operating cylinder 2, a guide rod 1202 being slidably connected to the sleeve 1201, and one end of the guide rod 1202 being fixed to the transmission plate 603;

[0049] It should be noted here that: the drive motor 1104 drives the threaded rod 1102 to rotate. During the rotation of the threaded rod 1102, the mounting base 1101 and the slide 1001 move through the mutual meshing transmission between the threaded rod 1102 and the threaded tube 1103 and the sliding guidance of the sleeve 1201 and the guide rod 1202. The movement of the slide 1001 drives the U-shaped card holder 1002 to move.

[0050] Preferably, multiple sets of positioning components are provided on the upper end of the underwater robot 102, and the multiple sets of positioning components are evenly distributed around the through hole. The positioning component includes a U-shaped frame 1301 fixed on the upper end of the underwater robot 102, a mounting shaft 1302 rotatably connected to the U-shaped frame 1301, a fixing cylinder 1303 fixed on the mounting shaft 1302, a second ball bearing 1304 rotatably connected to the front end of the fixing cylinder 1303 for supporting the drill rod 103 and the outer side of the casing 104 being transported, and an elastic component for elastically supporting the fixing cylinder 1303 on the U-shaped frame 1301.

[0051] It should be noted that during the delivery and transport of drill rod 103 and casing 104, the front ends of drill rod 103 and casing 104 abut against the outer side of fixed cylinder 1303, pushing fixed cylinder 1303 towards U-shaped frame 1301 to retract and rotate. As drill rod 103 and casing 104 continue to be transported, the elastic force of the elastic component pushes the fixed cylinder 1303, causing the second ball bearing 1304 at the front end of fixed cylinder 1303 to abut against the outer side of the transported drill rod 103 and casing 104. Through the abutment action of the second ball bearing 1304 on each positioning component against the outer side of the transported drill rod 103 and casing 104, the transported drill rod 103 and casing 104 are supported and positioned, facilitating more precise transport.

[0052] Preferably, the elastic component includes a rotating shaft 1401 rotatably connected to the U-shaped frame 1301, a connecting cylinder 1402 disposed below the fixed cylinder 1303, one end of the connecting cylinder 1402 being rotatably connected to the rotating shaft 1401, a sliding plate 1403 being slidably connected to the connecting cylinder 1402, a connecting rod 1404 being slidably connected to the front end of the connecting cylinder 1402, one end of the connecting rod 1404 being fixed to the sliding plate 1403, the other end of the connecting rod 1404 being rotatably connected to the outside of the fixed cylinder 1303, and a second spring 1405 for connecting the sliding plate 1403 being disposed inside the connecting cylinder 1402;

[0053] It should be noted that during the movement of the fixed cylinder 1303, the connecting rod 1404 pushes the sliding plate 1403 to move inside the connecting cylinder 1402, causing the second spring 1405 to deform under force and generate elastic force. The elastic force of the second spring 1405 facilitates the elastic push of the fixed cylinder 1303 after it is subjected to force.

[0054] In this solution: a seabed drilling device for marine geological exploration includes the following steps:

[0055] During underwater marine geological exploration, the drilling device moves the exploration vessel 101 to the corresponding marine area. After the movement is completed, the underwater robot 102 is deployed underwater and lands on the seabed surface. The underwater robot 102 walks and positions itself to help determine the actual exploration location and improve the accuracy of the exploration drilling. After the exploration location is determined, the drill rod 103 is hoisted and driven by the drive component on the exploration vessel 101. During the hoisting process, the drill rod 103 passes through the through hole of the underwater robot 102. During the hoisting and driving of the drill rod 103, drilling is carried out on the seabed to form a well. After the drill rod 103 has drilled a certain distance, the drill rod 103 is pulled out and the casing 104 is deployed into the well through the deployment component to support the well wall and prevent collapse from affecting the continuous drilling. The above actions are repeated to drill the drill rod 103 and deploy the casing 104 in sequence to achieve continuous drilling on the seabed, which facilitates sampling and exploration operations at a specified depth on the seabed.

[0056] During the process of drill rod 103 passing through the through hole and operating cylinder 2 for descent and drilling, the annular plate 9 on the outer side of drill rod 103 abuts against the upper ends of the support plates 5 on the two sets of C-shaped plates 3. As drill rod 103 continues to descend and the annular plate 9 abuts against the support plates 5, the two sets of C-shaped plates 3 are driven to descend synchronously with drill rod 103. During the descent of C-shaped plates 3, the transmission plate 603 is driven to move synchronously. During the descent of transmission plate 603, the transmission plate 603... The inclined surface 7 abuts against the upper end of the casing 104, driving the transmission plate 603 to retract towards the C-shaped plate 3. During the retraction of the transmission plate 603, the transmission rod 602 is pushed to slide on the mounting cylinder 601, causing one side of the support plate 5 to abut against the outer side of the drill rod 103. Through the abutment action between the support plate 5 and the drill rod 103, the drill rod 103 is supported during the descent. Since the support plate 5 descends synchronously with the drill rod 103, the support plate 5 always maintains a relatively stable position relative to the drill rod 103. The front end is supported to reduce the swing amplitude of the drill rod 103 during drilling and descent, further preventing problems such as hole collapse or penetration on the casing 104, ensuring safety and effectiveness during drilling. Furthermore, during the drilling and support process of the drill rod 103, as the transmission plate 603 descends, the inclined surface 7 on the transmission plate 603 can abut against the upper end of the casing 104 with different inner diameters, allowing the drill rod 103 to maintain a supported state while drilling through different casings 104. After the drilling is completed and the drill rod 103 is driven to rise, as the drill rod 103 rises and the magnetic attraction between the annular plate 9 and the support plate 5 causes the two sets of C-shaped plates 3 to rise synchronously. As the C-shaped plates 3 continue to rise, they are locked into the U-shaped bracket 1002, which limits the rising C-shaped plates 3 and separates them from the drill rod 103. The separation and locking of the C-shaped plates 3 facilitates the continued support of the drill rod 103 when it is used for drilling again.

[0057] During the delivery and conveying of drill rod 103 and casing 104, the front ends of drill rod 103 and casing 104 abut against the outer side of fixed cylinder 1303, pushing fixed cylinder 1303 towards U-shaped frame 1301 to retract and rotate. As drill rod 103 and casing 104 continue to be conveyed, the elastic force of the elastic component pushes the fixed cylinder 1303, causing the second ball bearing 1304 at the front end of fixed cylinder 1303 to abut against the outer side of the conveyed drill rod 103 and casing 104. The second ball bearing 1304 on each positioning component abuts against the conveyed drill rod 103 and casing 104. The outer side of the casing 104 acts as abutment to support and position the drill rod 103 and the casing 104, facilitating more precise delivery. During the delivery of the casing 104, the push assembly and guide assembly drive the slide 1001 to move towards the outside of the operating cylinder 2. During the movement of the slide 1001, the U-shaped bracket 1002 drives the C-shaped plate 3 to move synchronously. By moving the two sets of C-shaped plates 3, the distance between the two sets of C-shaped plates 3 is increased, avoiding interference from the support plates 5 on the C-shaped plates 3 during the delivery of the casing 104.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seabed drilling device for marine geological exploration, comprising: An exploration hull (101) for exploration, a drill rod (103) for exploration drilling, a casing (104) for isolation during exploration drilling, and an underwater robot (102) for assisting exploration positioning, wherein a drill bit is installed at the front end of the drill rod (103), a driving component for hoisting and driving the drill rod (103) is provided on the exploration hull (101), and a delivery component for assisting the delivery of the casing (104) is provided on the exploration hull (101); It is characterized by further comprising: An operating cylinder (2) is fixed at the lower end of an underwater robot (102); the underwater robot (102) is provided with a through hole for assisting the transportation of a drill rod (103) and a casing (104); the operating cylinder (2) and the through hole are arranged concentrically; the upper end of the underwater robot (102) is provided with a positioning assembly for assisting the positioning and transportation of the drill rod (103) and the casing (104); two groups of C-shaped plates (3) are arranged inside the operating cylinder (2); the two groups of C-shaped plates (3) are connected by a connecting assembly, and the two groups of C-shaped plates (3) are arranged in a ring shape after being connected; the C-shaped plates (3) A plurality of support plates (5) are arranged on the inner side thereof for assisting in supporting the drill rod (103) for descending and conveying, and a rubber pad is arranged on the side where the support plate (5) and the drill rod (103) are supported against each other, a transmission component for elastically transmitting the support plate (5) is arranged on the C-shaped plate (3), a moving component for controlling the movement of the C-shaped plate (3) is arranged on the outer side of the operating cylinder (2), an annular plate (9) for resisting against the upper end of the support plate (5) for transmission is arranged on the outer side of the drill rod (103), and the annular plate (9) and the support plate (5) are maintained in a resisting connection by means of magnetism after resisting against each other; The transmission assembly comprises a mounting tube (601) fixed on the C-shaped plate (3), a transmission rod (602) being slidably connected to the mounting tube (601), one end of the transmission rod (602) being fixed to one side of the support plate (5), the other end of the transmission rod (602) being located on the outer side of the C-shaped plate (3) and fixed to a transmission plate (603), a first spring (604) being sleeved on the outer side of the mounting tube (601), the first spring (604) being abutted against the outer side of the C-shaped plate (3) and the transmission plate (603), and a rolling assembly for assisting sliding inside the casing (104) being arranged on a side of the transmission plate (603) away from the C-shaped plate (3); The lower end of the transmission plate (603) is provided with an inclined surface (7) for contacting with the upper end of the casing (104) to allow the transmission plate (603) to move toward the C-shaped plate (3) for contraction; The rolling assembly comprises a spherical groove (801) formed on one side of the transmission plate (603), and a first rolling ball (802) is rotatably connected to the spherical groove (801); The connection assembly comprises an iron block (401) and a magnetic block (402) fixed at two ends of the C-shaped plate (3), and the two groups of the C-shaped plates (3) are arranged in an interlaced manner relative to the iron block (401) and the magnetic block (402); The moving assembly comprises two groups of slides (1001) slidably connected to the operating cylinder (2); a U-shaped clamping frame (1002) for clamping and connecting with the C-shaped plate (3) is fixed on the two groups of slides (1001); and a pushing assembly for pushing the two groups of slides (1001) and a guiding assembly for guiding during the pushing process are arranged on the outer side of the operating cylinder (2).

2. The marine geological survey seabed drilling device according to claim 1, characterized in that: The pushing assembly comprises a mounting seat (1101) arranged on the outside of the operating cylinder (2), one end of the two groups of slides (1001) are fixed to the mounting seat (1101), a threaded rod (1102) is rotatably connected to the mounting seat (1101), a threaded tube (1103) is threadedly engaged on the threaded rod (1102), one end of the threaded tube (1103) is fixed to the outside of the operating cylinder (2), and a driving motor (1104) for driving the threaded rod (1102) is installed on the mounting seat (1101).

3. The marine geological survey seabed drilling device according to claim 2, characterized in that: The guide assembly comprises a sleeve (1201) fixed on the outside of the operating cylinder (2), a guide rod (1202) is slidably connected to the sleeve (1201), and one end of the guide rod (1202) is fixed to the transmission plate (603).

4. The marine geological survey seabed drilling device according to claim 1, characterized in that: The positioning components are provided in multiple groups at the upper end of the underwater robot (102), and the multiple groups of positioning components are evenly distributed around the through hole. The positioning components include a U-shaped frame (1301) fixed to the upper end of the underwater robot (102), a mounting shaft (1302) is rotatably connected to the U-shaped frame (1301), a fixing cylinder (1303) is fixed to the mounting shaft (1302), a front end of the fixing cylinder (1303) is rotatably connected to a second ball (1304) for supporting against the outer side of the transported drill rod (103) and the casing (104), and an elastic component for elastically supporting the fixing cylinder (1303) is provided on the U-shaped frame (1301).

5. The marine geological survey seabed drilling device according to claim 4, characterized in that: The elastic force component comprises a rotating shaft (1401) rotatably connected to the U-shaped frame (1301); a connecting cylinder (1402) is arranged below the fixed cylinder (1303); one end of the connecting cylinder (1402) is rotatably connected to the rotating shaft (1401); a slide plate (1403) is slidably connected to the connecting cylinder (1402); a connecting rod (1404) is slidably connected to the front end of the connecting cylinder (1402); one end of the connecting rod (1404) is fixed to the slide plate (1403); the other end of the connecting rod (1404) is rotatably connected to the outer side of the fixed cylinder (1303); and a second spring (1405) for connecting the slide plate (1403) is arranged inside the connecting cylinder (1402).

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