A bit replacement device applicable to marine exploration and drilling

Abstract

The present invention relates to a bit replacement device applicable to marine exploration and drilling, which is used for an offshore operation platform and includes a crane, a boom, and at least one replacement component. The top end of the boom is connected to the output end of the crane, and the bottom end of the boom extends to the seabed. Each of the at least one replacement component includes a fixed seat and two clamping members. The fixed seat is rotationally connected to the bottom end of the boom along the circumferential direction of the boom, and the fixed seat is slidably connected to the bottom end of the boom in a direction perpendicular to the boom. The two clamping members are respectively arranged at both ends of the fixed seat along its sliding direction. One of the clamping members is used to clamp the damaged bit and unscrew the damaged bit from the drill collar, and the other clamping member is used to clamp the replacement bit and screw the replacement bit onto the drill collar, solving the problem that when the bit is damaged and needs to be replaced, lifting the bit from the seabed to the water surface requires additional work and time compared to land exploration and drilling, and it is not easy to replace the bit.

Description

Technical Field

[0001] The present invention relates to the technical field of marine exploration drilling, and particularly relates to a bit replacement device applicable to marine exploration and drilling. Background Art

[0002] Compared with onshore exploration, offshore exploration has higher technical requirements, more capital investment, and greater risk factors, but the expected return of oil and gas exploration in the ocean is also large.

[0003] The processes of marine exploration and drilling are the same as those of onshore exploration and drilling. They both use the method of sequentially splicing multiple drill pipes to send the drill bit to a predetermined position, and under the rotation of the drill bit and the gravity of the drill pipe, the function of drilling is achieved.

[0004] However, due to the different drilling environments of marine resource exploration and drilling, the drill bit needs to be submerged to the seabed before starting the drilling operation. When the drill bit is damaged and needs to be replaced, lifting the drill bit from the seabed to the water surface requires additional work and time compared to onshore exploration and drilling, and it is not easy to replace the drill bit. Summary of the Invention

[0005] In view of this, it is necessary to provide a bit replacement device applicable to marine exploration and drilling to solve the problem that when the drill bit is damaged and needs to be replaced, lifting the drill bit from the seabed to the water surface requires additional work and time compared to onshore exploration and drilling, and it is not easy to replace the drill bit.

[0006] The present invention provides a bit replacement device applicable to marine exploration and drilling, which is used for an offshore operation platform and includes a crane, a boom, and at least one replacement component. The top end of the boom is connected to the output end of the crane, and the bottom end of the boom extends to the seabed; at least one of the replacement components includes a fixed seat and two clamping members. The fixed seat is rotationally connected to the bottom end of the boom along the circumferential direction of the boom to adjust the position of the two clamping members relative to the drill collar. The fixed seat is slidably connected to the bottom end of the boom along a direction perpendicular to the boom to adjust the distance between the two clamping members relative to the drill collar. The two clamping members are respectively arranged at both ends of the fixed seat along its sliding direction. One of the clamping members is used to clamp the damaged drill bit and screw the damaged drill bit off the drill collar, and the other clamping member is used to clamp the replacement drill bit and screw the replacement drill bit onto the drill collar.

[0007] Furthermore, the replacement component further includes a first driving member, and the first driving member is used to drive the fixed seat to rotate and slide;

[0008] The first driving member includes a sliding plate and a first oil cylinder. The sliding plate is fixedly connected to the bottom end of the suspension rod. The fixed seat is slidably connected to the sliding plate along the direction of the connection line of the two clamping members. One end of the first oil cylinder is fixedly connected to the sliding plate, and the other end of the first oil cylinder is connected to the fixed seat to drive the fixed seat to slide. The fixed seat rotates via the rotation of the suspension rod.

[0009] Further, each of the clamping members includes two relatively arranged semi-circular support seats and two semi-circular rotating plates. The two semi-circular support seats are movably connected to the fixed seat, and the two semi-circular support seats can move to a first position and a second position. When the two semi-circular support seats move to the first position, the two semi-circular support seats are butted to form a first annular structure for clamping a damaged drill bit or a replacement drill bit. The two semi-circular rotating plates are butted to form a second annular structure, and the second annular structure is coaxially rotatably connected to the first annular structure. At least one protrusion for mating and clamping with the damaged drill bit or the replacement drill bit is provided on the inner wall of the second annular structure. By rotating the second annular structure, the damaged drill bit is screwed off from the drill collar or the replacement drill bit is screwed into the drill collar. When the two semi-circular support seats move to the second position, there is a gap between the two semi-circular support seats and a gap between the two semi-circular rotating plates to release the damaged drill bit or the replacement drill bit.

[0010] Further, the replacement assembly further includes two second driving members. The two second driving members are both connected to the fixed seat, and the output ends of the two second driving members are respectively connected to the two semi-circular support seats in the two clamping members to drive the two semi-circular support seats in each clamping member to move between the first position and the second position.

[0011] Each of the two second driving members includes two relatively arranged connecting rods and a second oil cylinder. One end of each of the two connecting rods is hinged to the fixed seat, and the other ends of the two connecting rods are respectively fixedly connected to the two semi-circular support seats in the clamping member. The two ends of the second oil cylinder are respectively slidably hinged to the two connecting rods.

[0012] Further, a plurality of semi-circular teeth are provided on the outer walls of the two semi-circular rotating plates. When the two semi-circular rotating plates are butted to form the second annular structure, the plurality of semi-circular teeth on the two semi-circular rotating plates form an annular rack. The replacement assembly further includes a third driving member, and the output end of the third driving member is connected to the annular rack to drive the annular rack to rotate synchronously with the protrusion on the second annular structure.

[0013] The third driving member includes a rotary oil cylinder and a gear. The rotary oil cylinder is fixedly connected to one of the semi-ring support seats. The output end of the rotary oil cylinder is connected to the gear, and the gear is meshed with the annular rack.

[0014] Further, arc-shaped grooves are formed on one side of the two semi-ring support seats in the clamping member close to the semi-ring rotating plate. Sliders are fixedly connected to the bottoms of the two semi-ring rotating plates. When the two semi-ring support seats move to the first position, the two arc-shaped grooves are butted to form an annular groove, and the two sliders are slidably connected to the annular groove. When the two semi-ring support seats move to the second position, the two arc-shaped grooves are arranged at intervals, and the two sliders are respectively slidably connected to the two arc-shaped grooves.

[0015] Further, a locking member is further included. The locking member is connected to the semi-ring support plate. When the two semi-ring support seats move to the first position, the output end of the locking member is arranged at intervals with the two semi-ring rotating plates. When the two semi-ring support seats move to the second position, the output end of the locking member abuts against the two semi-ring rotating plates.

[0016] Further, the locking member includes a plurality of first elastic plates and a plurality of second elastic plates corresponding to the plurality of arc-shaped grooves one by one. The first elastic plates and the plurality of second elastic plates are arranged at both ends of the corresponding arc-shaped grooves. The first elastic plates and the second elastic plates are both inclined upward along the rotation direction of the slider in the arc-shaped groove.

[0017] Further, a groove is formed in the semi-ring support seat in the arc-shaped groove, and the first elastic plate and / or the second elastic plate can be rotated to be completely embedded in the groove.

[0018] Further, the number of the replacement assemblies is multiple. The multiple replacement assemblies are arranged in sequence along the length direction of the suspension rod, and the projections of the multiple clamping members on the horizontal plane are arranged in sequence along the circumferential direction of the suspension rod.

[0019] Compared with the prior art, the top end of the boom is connected to the output end of the crane, and the bottom end of the boom extends to the seabed. By controlling the position of the boom in the horizontal direction relative to the exploration drilling assembly, the position of the replacement assembly connected to the boom relative to the drill bit to be replaced can be controlled. During the exploration or drilling process, if downward excavation cannot be carried out and it is detected that the drill bit needs to be replaced, by setting the fixed seat to be rotationally connected to the bottom end of the boom along the circumferential direction of the boom to adjust the position of the two clamping members relative to the drill collar, and the fixed seat is slidably connected to the bottom end of the boom perpendicular to the boom direction to adjust the distance between the two clamping members relative to the drill collar. The two clamping members are respectively arranged at both ends of the fixed seat along its sliding direction. Under the movement of the fixed seat, first, lift the damaged drill bit to the same horizontal height as the clamping member, drive one of the clamping members to clamp the damaged drill bit, and screw the damaged drill bit off the drill collar. By rotating the boom, the other clamping member moves the replaced drill bit held by it below the drill collar and screws the replaced drill bit onto the drill collar, thus completing the process of replacing the drill bit. The seabed maintenance operation effectively reduces the height that the drill bit needs to be lifted, greatly shortens the construction period of replacing the drill bit, replaces the cumbersome process of having to lift the drill bit to the water surface in the traditional way, and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic structural diagram of the overall structure in the drill bit replacement device suitable for marine exploration and drilling provided by an embodiment of the present invention;

[0021] Figure 2 FIG. is a schematic structural diagram of the replacement assembly in the drill bit replacement device suitable for marine exploration and drilling provided by an embodiment of the present invention;

[0022] Figure 3 FIG. is a schematic structural diagram of the docking of two semi-circular support seats in the drill bit replacement device suitable for marine exploration and drilling provided by an embodiment of the present invention;

[0023] Figure 4 FIG. is a schematic structural diagram of the docking of two semi-circular rotating plates in the drill bit replacement device suitable for marine exploration and drilling provided by an embodiment of the present invention;

[0024] Figure 5 FIG. is a schematic structural diagram of the first elastic plate and the slider located in the arc-shaped groove in the drill bit replacement device suitable for marine exploration and drilling provided by an embodiment of the present invention;

[0025] Figure 6 FIG. is a schematic structural diagram of the second elastic plate and the slider located in the arc-shaped groove in the drill bit replacement device suitable for marine exploration and drilling provided by an embodiment of the present invention;

[0026] Figure 7Schematic diagram of the connection between two replacement components and the suspension rod in the bit replacement device applicable to marine exploration and drilling provided by the embodiments of the present invention;

[0027] Figure 8 Schematic diagram of the connection between four replacement components and the suspension rod in the bit replacement device applicable to marine exploration and drilling provided by the embodiments of the present invention. Detailed implementation manners

[0028] The preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. The accompanying drawings form a part of this application and are used together with the embodiments of the present invention to explain the principles of the present invention, rather than to limit the scope of the present invention.

[0029] As Figure 1-2 shown, a bit replacement device applicable to marine exploration and drilling provided by the present invention is used for an offshore operation platform 100, and includes a crane 200, a suspension rod 300, and at least one replacement component 400. The top end of the suspension rod 300 is connected to the output end of the crane 200, and the bottom end of the suspension rod 300 extends to the seabed; each of the at least one replacement component 400 includes a fixed seat 410 and two clamping members 420. The fixed seat 410 is rotationally connected to the bottom end of the suspension rod 300 along the circumferential direction of the suspension rod 300 to adjust the positions of the two clamping members 420 relative to the drill collar. The fixed seat 410 is slidably connected to the bottom end of the suspension rod 300 in a direction perpendicular to the suspension rod 300 to adjust the distance between the two clamping members 420 relative to the drill collar. The two clamping members 420 are respectively arranged at both ends of the fixed seat 410 along its sliding direction. One of the clamping members 420 is used to clamp the damaged bit and unscrew the damaged bit from the drill collar, and the other clamping member 420 is used to clamp the replacement bit and screw the replacement bit into the drill collar.

[0030] It should be noted that the bit replacement device in this application is a structure independent of the exploration and drilling device. As Figure 1 shown in

[0031] During implementation, the top end of the boom 300 is connected to the output end of the crane 200, and the bottom end of the boom 300 extends to the seabed. By controlling the position of the boom 300 in the horizontal direction relative to the exploration drilling assembly 500, the position of the replacement assembly 400 connected to the boom 300 relative to the drill bit to be replaced can be controlled. During the exploration or drilling process, if downward excavation cannot be carried out and it is detected that the drill bit needs to be replaced, by setting the fixed seat 410 to be rotationally connected to the bottom end of the boom 300 along the circumferential direction of the boom 300, it is used to adjust the position of the two clamping members 420 relative to the drill collar. The fixed seat 410 is slidably connected to the bottom end of the boom 300 in a direction perpendicular to the boom 300, which is used to adjust the distance between the two clamping members 420 relative to the drill collar. The two clamping members 420 are respectively arranged at both ends of the fixed seat 410 along its sliding direction. Under the movement of the fixed seat 410, first, lift the damaged drill bit to the same horizontal height as the clamping member 420, drive one of the clamping members 420 to clamp the damaged drill bit, and unscrew the damaged drill bit from the drill collar. By rotating the boom 300, the other clamping member 420 moves the replaced drill bit it holds to below the drill collar and screws the replaced drill bit onto the drill collar, thus completing the process of replacing the drill bit. The seabed maintenance operation effectively reduces the height that the drill bit needs to be lifted, greatly shortens the construction period of replacing the drill bit, replaces the cumbersome process of having to lift the drill bit to the water surface in the traditional way, saving time and effort.

[0032] The offshore operation platform 100 described above can be used for resource exploration or resource collection operations. When used for resource exploration, the offshore operation platform 100 is an exploration vessel, and when used for resource collection, the offshore operation platform 100 is an offshore drilling platform. That is, the drill bit replacement device in this application is applicable to the environment of offshore resource exploration and collection.

[0033] The crane 200 in this implementation scheme is a common structure for resource exploration and drilling, which is used to play the role of the boom 300. At the same time, through the rotation of the boom of the crane 200, the boom 300 can be driven to rotate, and no more elaboration and description will be given here.

[0034] The structure of the boom 300 in this implementation scheme is the same as that of the drill pipe 520, which is a structure formed by splicing multiple sections, and it is a structure that those skilled in the art can think of, and no more elaboration and description will be given here.

[0035] The replacement component 400 in this implementation scheme is used to unscrew the damaged drill bit on the drill collar and screw the replacement drill bit into the drill collar at the same time, thus completing the process of replacing the drill bit. Specifically, at least one replacement component 400 includes a fixed seat 410 and two clamping members 420. The fixed seat 410 is rotationally connected to the bottom end of the suspension rod 300 along the circumferential direction of the suspension rod 300 to adjust the position of the two clamping members 420 relative to the drill collar. The fixed seat 410 is slidably connected to the bottom end of the suspension rod 300 in a direction perpendicular to the suspension rod 300 to adjust the distance between the two clamping members 420 relative to the drill collar. The two clamping members 420 are respectively arranged at both ends of the fixed seat 410 along its sliding direction. One clamping member 420 is used to clamp the damaged drill bit and unscrew the damaged drill bit from the drill collar, and the other clamping member 420 is used to clamp the replacement drill bit and screw the replacement drill bit into the drill collar.

[0036] As Figure 2 shown, in order to realize the rotation and sliding of the fixed seat 410, in one embodiment, the replacement component 400 further includes a first driving member 430. The first driving member 430 is used to drive the fixed seat 410 to rotate and slide. Among them, the first driving member 430 includes a sliding plate 431 and a first oil cylinder 432. The sliding plate 431 is fixedly connected to the bottom end of the suspension rod 300. The fixed seat 410 is slidably connected to the sliding plate 431 along the direction of the connection line of the two clamping members 420. One end of the first oil cylinder 432 is fixedly connected to the sliding plate 431, and the other end of the first oil cylinder 432 is connected to the fixed seat 410 to drive the fixed seat 410 to slide. The fixed seat 410 rotates due to the rotation of the suspension rod 300.

[0037] Of course, in other embodiments, other forms of structures can also be used to drive the rotation and sliding of the fixed seat 410, and the embodiments of the present invention do not limit this.

[0038] As Figure 2-4As shown, in order to achieve the function of screwing off a damaged drill bit from the drill collar or screwing a replacement drill bit into the drill collar, in one embodiment, the clamping member 420 includes two semi-circular support seats 421 and two semi-circular rotating plates 422 which are oppositely arranged. The two semi-circular support seats 421 are movably connected to the fixed seat 410, and the two semi-circular support seats 421 can move to the first position and the second position. When the two semi-circular support seats 421 move to the first position, the two semi-circular support seats 421 are butted to form a first annular structure for clamping the damaged drill bit or the replacement drill bit. The two semi-circular rotating plates 422 are butted to form a second annular structure. The second annular structure is coaxially rotatably connected to the first annular structure. At least one protrusion 423 for mating and clamping with the damaged drill bit or the replacement drill bit is arranged on the inner wall of the second annular structure. Through the rotation of the second annular structure, the damaged drill bit is screwed off from the drill collar or the replacement drill bit is screwed into the drill collar. When the two semi-circular support seats 421 move to the second position, the two semi-circular support seats 421 are spaced apart, and the two semi-circular rotating plates 422 are spaced apart to release the damaged drill bit or the replacement drill bit.

[0039] As Figure 2 As shown, in order to facilitate driving the two semi-circular support seats 421 in each clamping member 420 to move between the first position and the second position, in one embodiment, the replacement assembly 400 further includes two second driving members 440. The two second driving members 440 are both connected to the fixed seat 410, and the output ends of the two second driving members 440 are respectively connected to the two semi-circular support seats 421 in the two clamping members 420 to drive the two semi-circular support seats 421 in each clamping member 420 to move between the first position and the second position. Wherein, the two second driving members 440 each include two connecting rods 441 and a second oil cylinder 442 which are oppositely arranged. One ends of the two connecting rods 441 are both hinged to the fixed seat 410, and the other ends of the two connecting rods 441 are respectively fixedly connected to the two semi-circular support seats 421 in the clamping member 420. The two ends of the second oil cylinder 442 are respectively slidably hinged to the two connecting rods 441.

[0040] Of course, in other embodiments, other forms of structures can also be used to drive the two semi-circular support seats 421 in each clamping member 420 to move between the first position and the second position, and the embodiments of the present invention do not limit this.

[0041] In order to enable the protrusion 423 on the second annular structure to rotate, so as to screw off the damaged drill bit from the drill collar or screw the replacement drill bit into the drill collar. In one embodiment, a plurality of semi-circular teeth are provided on the outer walls of both semi-circular rotating plates 422. When the two semi-circular rotating plates 422 are butted to form the second annular structure, the plurality of semi-circular teeth on the two semi-circular rotating plates 422 form an annular rack 424. The replacement assembly 400 further includes a third driving member 450, and the output end of the third driving member 450 is connected to the annular rack 424 for driving the annular rack 424 to drive the protrusion 423 on the second annular structure to rotate synchronously. Among them, the third driving member 450 includes a rotary oil cylinder and a gear. The rotary oil cylinder is fixedly connected to one of the semi-circular support seats, the output end of the rotary oil cylinder is connected to the gear, and the gear is meshed and connected to the annular rack 424.

[0042] Of course, in other embodiments, other methods can also be used to drive the coaxial rotation of the second annular structure relative to the first annular structure, and the embodiments of the present invention do not limit this.

[0043] In order to realize the function of the coaxial rotation of the second annular structure relative to the first annular structure, in one embodiment, arc-shaped grooves are provided on one side of the two semi-circular support seats 421 in the clamping member 420 close to the semi-circular rotating plate. Sliders 425 are fixedly connected to the bottoms of the two semi-circular rotating plates. When the two semi-circular support seats 421 move to the first position, the two arc-shaped grooves are butted to form an annular groove 426, and the two sliders 425 are slidably connected to the annular groove 426. When the two semi-circular support seats 421 move to the second position, the two arc-shaped grooves are arranged at intervals, and the two sliders 425 are respectively slidably connected to the two arc-shaped grooves.

[0044] Since the drill bit needs to be clamped, the two semi-circular support seats 421 need to move to the second position so that the drill bit enters between the two annular support seats. At this time, the two semi-circular rotating plates 422 are likely to slide out of the arc-shaped grooves. To solve the above problems, in one embodiment, a locking member is further included. The locking member is connected to the semi-circular support plate. When the two semi-circular support seats 421 move to the first position, the output end of the locking member is arranged at an interval from the two semi-circular rotating plates 422. When the two semi-circular support seats 421 move to the second position, the output end of the locking member abuts against the two semi-circular rotating plates 422.

[0045] Such as Figure 3 and Figure 5-6As shown in the figure, the locking member includes a plurality of first elastic plates 427 and a plurality of second elastic plates 428 corresponding to the plurality of arc-shaped grooves one by one. The first elastic plates 427 and the plurality of second elastic plates 428 are arranged at both ends of the corresponding arc-shaped grooves. Both the first elastic plates 427 and the second elastic plates 428 are inclined upward along the rotation direction of the slider 425 in the arc-shaped groove. The first elastic plates 427 and the second elastic plates 428 can effectively prevent the slider 425 from sliding out of the arc-shaped groove. At the same time, only under the external force of the third driving member 450, the slider 425 can break the elastic deformation of the first elastic plates 427 and the second elastic plates 428 as the second annular structure rotates, so that the slider 425 can pass through the interception of the first elastic plates 427 and the second elastic plates 428.

[0046] In order to make the slider 425 slide smoothly, in one embodiment, the semi-circular support base 421 is provided with a groove 429 in the arc-shaped groove, and the first elastic plate 427 and / or the second elastic plate 428 can be rotated to be completely embedded in the groove 429.

[0047] Of course, in other embodiments, the locking member can also adopt other forms of structures to prevent the semi-circular rotating plate 422 from sliding out of the arc-shaped groove, and the embodiments of the present invention do not limit this.

[0048] In order to increase the number of times of drill bit replacement, reduce the number of times of raising and lowering the drill, and save time, in some embodiments, the number of replacement assemblies 400 is multiple, and the multiple replacement assemblies 400 are arranged in sequence along the length direction of the suspension rod 300, and the projections of the multiple clamping members 420 on the horizontal plane are arranged in sequence along the circumferential direction of the suspension rod 300.

[0049] As Figure 7 shown, the number of replacement assemblies 400 is two, and the drill bit can be replaced three times. As Figure 8 shown, the number of replacement assemblies 400 is four, and the drill bit can be replaced seven times. Specifically, one of the clamping members 420 needs to be unloaded to remove the damaged drill bit, and the remaining clamping members 420 can be pre-placed with the drill bits to be replaced.

[0050] The drill bit 530 replacement device in this application is used in cooperation with the exploration drilling assembly 500. Among them, the exploration drilling assembly 500 generally includes a hoist 510 (similar in structure to the crane 200), a drill pipe 520 (similar in structure to the suspension rod 300), a drill bit 530, a blowout preventer 540, and a drill collar. The hoist 510 is fixed on the offshore operation platform 100. The top end of the drill pipe 520 is connected to the output end of the hoist 510. The bottom end of the drill pipe 520 passes through the blowout preventer 540 and is connected to the drill bit 530 via the drill collar. After the drill bit 530 is damaged after being used for a period of time, the drill bit 530 is moved out to the top of the blowout preventer 540 by the hoist 510, and then replaced by the drill bit 530 replacement device in this application.

[0051] It should be noted that the control principles of the first oil cylinder 432, the second oil cylinder 442 and the rotary oil cylinder in this application are the same as those of the blowout preventer 540, which are structures that can be conceived by those skilled in the art, and will not be elaborated and described in detail here.

[0052] Compared with the prior art: The top end of the boom 300 is connected to the output end of the crane 200, and the bottom end of the boom 300 extends to the seabed. By controlling the position of the boom 300 in the horizontal direction relative to the exploration drilling assembly 500, the position of the replacement assembly 400 connected to the boom 300 relative to the drill bit to be replaced can be controlled. During the exploration or drilling process, if downward excavation cannot be carried out and it is detected that the drill bit 530 needs to be replaced, by setting the fixing seat 410 to be rotationally connected to the bottom end of the boom 300 along the circumferential direction of the boom 300, the position of the two clamping members 420 relative to the drill collar can be adjusted. The fixing seat 410 is slidably connected to the bottom end of the boom 300 in a direction perpendicular to the boom 300 to adjust the distance between the two clamping members 420 relative to the drill collar. The two clamping members 420 are respectively arranged at both ends of the fixing seat 410 along its sliding direction. Under the movement of the fixing seat 410, first, the damaged drill bit is lifted to the same horizontal height as the clamping member 420, driving one of the clamping members 420 to clamp the damaged drill bit and unscrew the damaged drill bit from the drill collar. By rotating the boom 300, the other clamping member 420 moves the replaced drill bit held by it below the drill collar and screws the replaced drill bit onto the drill collar, thus completing the process of replacing the drill bit 530. The underwater maintenance operation effectively reduces the height that the drill bit 530 needs to be lifted, greatly shortens the construction period for replacing the drill bit 530, and replaces the cumbersome process of having to lift the drill bit 530 to the water surface in the traditional method, saving time and effort.

[0053] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A bit replacement device applicable to marine exploration and drilling, used for an offshore operation platform, characterized in that, it includes a crane, a boom and at least one replacement component; The top end of the boom is connected to the output end of the crane, and the bottom end of the boom extends to the seabed; At least one of the replacement components includes a fixed seat and two clamping members. The fixed seat is rotationally connected to the bottom end of the boom along the circumferential direction of the boom for adjusting the position of the two clamping members relative to the drill collar. The fixed seat is slidably connected to the bottom end of the boom in a direction perpendicular to the boom for adjusting the distance between the two clamping members relative to the drill collar. The two clamping members are respectively arranged at both ends of the fixed seat along its sliding direction. One of the clamping members is used to clamp the damaged bit and unscrew the damaged bit from the drill collar, and the other clamping member is used to clamp the replacement bit and screw the replacement bit into the drill collar; The replacement component further includes a first driving member for driving the fixed seat to rotate and slide; The first driving member includes a sliding plate and a first oil cylinder. The sliding plate is fixedly connected to the bottom end of the boom. The fixed seat is slidably connected to the sliding plate along the direction of the connection line of the two clamping members. One end of the first oil cylinder is fixedly connected to the sliding plate, and the other end of the first oil cylinder is connected to the fixed seat for driving the fixed seat to slide. The fixed seat rotates via the rotation of the boom; Each of the clamping members includes two relatively arranged semi-circular support seats and two semi-circular rotating plates. The two semi-circular support seats are movably connected to the fixed seat. The two semi-circular support seats can move to a first position and a second position. When the two semi-circular support seats move to the first position, the two semi-circular support seats are butted to form a first annular structure for clamping the damaged bit or the replacement bit. The two semi-circular rotating plates are butted to form a second annular structure. The second annular structure is coaxially rotatably connected to the first annular structure. At least one protrusion for mating and clamping with the damaged bit or the replacement bit is arranged on the inner wall of the second annular structure. By rotating the second annular structure, the damaged bit is unscrewed from the drill collar or the replacement bit is screwed into the drill collar. When the two semi-circular support seats move to the second position, the two semi-circular support seats are spaced apart, and the two semi-circular rotating plates are spaced apart for releasing the damaged bit or the replacement bit.

2. The bit replacement device applicable to marine exploration and drilling according to claim 1, characterized in that, the replacement component further includes two second driving members. The two second driving members are both connected to the fixed seat. The output ends of the two second driving members are respectively connected to the two semi-circular support seats in the two clamping members for driving the two semi-circular support seats in each clamping member to move between the first position and the second position; Each of the two second driving members includes two connecting rods and a second oil cylinder which are oppositely arranged. One ends of the two connecting rods are respectively hinged to the fixed seat, and the other ends of the two connecting rods are respectively fixedly connected to the two semi-circular supporting seats in the clamping member. Two ends of the second oil cylinder are respectively slidably hinged to the two connecting rods.

3. The drill bit replacement device applicable to ocean exploration and drilling according to claim 1, characterized in that, A plurality of semi-circular teeth are arranged on the outer walls of the two semi-circular rotating plates. When the two semi-circular rotating plates are butted to form the second circular structure, the plurality of semi-circular teeth on the two semi-circular rotating plates form an annular rack. The replacement assembly further includes a third driving member, and an output end of the third driving member is connected to the annular rack for driving the annular rack to synchronously rotate with the protrusions on the second circular structure; The third driving member includes a rotary oil cylinder and a gear. The rotary oil cylinder is fixedly connected to one of the semi-circular support seats. An output end of the rotary oil cylinder is connected to the gear, and the gear is meshed and connected to the annular rack.

4. The drill bit replacement device applicable to ocean exploration and drilling according to claim 1, characterized in that, Arc-shaped grooves are formed on one sides of the two semi-circular support seats in the clamping member close to the semi-circular rotating plates. Sliders are fixedly connected to the bottoms of the two semi-circular rotating plates. When the two semi-circular support seats move to the first position, the two arc-shaped grooves are butted to form an annular groove, and the two sliders are slidably connected to the annular groove. When the two semi-circular support seats move to the second position, the two arc-shaped grooves are arranged at intervals, and the two sliders are respectively slidably connected to the two arc-shaped grooves.

5. The drill bit replacement device applicable to ocean exploration and drilling according to claim 4, characterized in that, It further includes a locking member, and the locking member is connected to the semi-circular support plate. When the two semi-circular support seats move to the first position, an output end of the locking member is arranged at an interval from the two semi-circular rotating plates. When the two semi-circular support seats move to the second position, the output end of the locking member abuts against the two semi-circular rotating plates.

6. The drill bit replacement device applicable to ocean exploration and drilling according to claim 5, characterized in that, The locking member includes a plurality of first elastic plates and a plurality of second elastic plates corresponding to the plurality of arc-shaped grooves one by one. The first elastic plates and the plurality of second elastic plates are arranged at two ends of the corresponding arc-shaped grooves, and the first elastic plates and the second elastic plates are both inclined upward along the rotation direction of the sliders in the arc-shaped grooves.

7. The drill bit replacement device applicable to ocean exploration and drilling according to claim 6, characterized in that, A groove is formed in the semi-circular support seat in the arc-shaped groove, and the first elastic plate and / or the second elastic plate can be rotated to be completely embedded in the groove.

8. The drill bit replacement device applicable to ocean exploration and drilling according to claim 1, characterized in that, The number of the replacement components is multiple, and the multiple replacement components are arranged in sequence along the length direction of the suspension rod, and the projections of the multiple clamping components on the horizontal plane are arranged in sequence along the circumferential direction of the suspension rod.

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