A dredge for ultra-deep drilling operations

Abstract

The application discloses a dredging ship for super-deep drill pipe operation, which comprises a ship body, a support frame, a driving assembly, a drill pipe cylinder, an agitation assembly, a jetting assembly and a suction assembly. The support frame is fixed to one end of the ship body, the drill pipe cylinder is slidably arranged on the support frame, the driving assembly drives the drill pipe cylinder to move up and down, and the agitation assembly is installed at the lower end of the drill pipe cylinder and used for drilling and agitating silt. The suction assembly comprises a suction pump and a suction pipe, the water inlet end of the suction pipe extends to the lower end of the drill pipe cylinder, and the water outlet end of the suction pipe is communicated with the suction pump. The jetting assembly comprises a pumping member, a pumping pipe and a water jet pipe, the water outlet end of the pumping pipe extends to the lower end of the drill pipe cylinder, the first end of the water jet pipe is communicated with the pumping pipe, the second end of the water jet pipe extends into the suction pipe and is arranged towards the water outlet end of the suction pipe, and the water jet pipe is provided with a plurality of water jet pipes which are distributed along the axis of the suction pipe at intervals. The application generates multiple-stage negative pressure in the suction pipe to realize step-by-step suction, effectively improves the suction lift, breaks through the depth limit of 10 meters for the drill pipe ship and realizes efficient dredging of super-deep silt.

Description

Technical Field

[0001] This invention relates to the field of dredging equipment technology, and more specifically to a dredging vessel for ultra-deep drilling operations. Background Technology

[0002] Dredging vessels are essential equipment used in dredging projects of rivers, lakes, and port channels. Existing conventional dredging vessels include suction dredgers, jet dredgers, and drill pipe dredgers. Suction dredgers and jet dredgers are mainly used for treating surface silt, while drill pipe dredgers are used for treating deep silt. Drill pipe dredgers drill directly into the deep layers of rivers and lakes to remove silt without disturbing the surface silt, thus minimizing environmental damage.

[0003] However, as the drill pipe on the drill pipe vessel was further lengthened, it was discovered during use that the longer the drill pipe, the higher the suction head required to move upwards to remove silt, especially in the early stages of drilling. When most of the drill pipe was above the water surface, the required upward suction head was almost equal to the length of the drill pipe itself. The maximum upward suction head, achieved through suction, would not exceed ten meters, meaning that even with a complete vacuum inside the suction pipe, the suction head would be ten meters. This limited further lengthening of the drill pipe. Furthermore, if pumping were used, the small size of the drill pipe head made it impossible to install existing conventional pumping equipment.

[0004] In conclusion, there is an urgent need for a dredging vessel for ultra-deep drill pipe operations to solve, or at least partially solve, the problems existing in the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a dredging vessel for ultra-deep drill pipe operations, aiming to solve the problem that existing structures limit the further lengthening of drill pipes. The specific technical solution is as follows: A dredging vessel for ultra-deep drill pipe operations includes a hull, a support frame, a drive assembly, a drill pipe cylinder, an agitation assembly, a jetting assembly, and a suction assembly. The support frame is arranged along the height direction and is fixedly connected to one end of the hull. The drill pipe cylinder is slidably arranged on the support frame along the height direction. The drive assembly is mounted on the hull and is used to drive the drill pipe barrel to move up and down along the height direction; The agitation assembly is installed on the drill pipe body and is used to drill and agitate the lower end of the drill pipe body; The suction assembly includes a suction pump and a suction pipe. The inlet end of the suction pipe extends into the drill pipe body and extends to the lower end of the drill pipe body. The outlet end of the suction pipe is connected to the suction pump. The jetting assembly includes a pumping component, a pumping pipe, and a water spray pipe. The outlet end of the pumping pipe extends into the drill pipe body and extends to the lower end of the drill pipe body. The inlet end of the pumping pipe is connected to the pumping component. The first end of the water spray pipe is connected to the pumping pipe, and the second end of the water spray pipe extends into the suction pipe, with the second end of the water spray pipe facing the outlet end of the suction pipe. Multiple water spray pipes are installed, and these pipes are spaced apart along the axis of the suction pipe.

[0006] Preferably, the water outlet end of the spray pipe is provided with a constriction with a gradually decreasing diameter.

[0007] Preferably, the suction pipe is provided with a constriction section, which is arranged with a large diameter at the top and bottom ends and a small diameter in the middle. Multiple constriction sections are provided, and each of the multiple constriction sections is arranged in a one-to-one correspondence with multiple water spray pipes. The middle constriction structure of the constriction section corresponds to the water outlet end of the water spray pipe.

[0008] Preferably, the water spray pipe includes a water intake section, a buoyancy control component, and a water spray section. The first end of the water intake section is connected to the pumping pipe, and the second end of the water intake section is parallel to the drill pipe body and extends along the drill pipe body. The first end of the water spray section extends into the suction pipe, and the second end of the water spray section is parallel to the second end of the water intake section and extends in the same direction as the second end of the water intake section. The first end of the buoyancy control component is slidably sleeved on the second end of the water intake section, and the second end of the buoyancy control component is slidably sleeved on the second end of the water spray section. Under the action of buoyancy, the buoyancy control component slides from bottom to top, controlling the water intake section and the water spray section to change from being connected to being closed.

[0009] Preferably, the buoyancy control component includes an H-shaped tube, a float, and a counterweight. The first end of the H-shaped tube is slidably sleeved on the second end of the water intake section, and the second end of the H-shaped tube is slidably sleeved on the second end of the water spray section. The float and the counterweight are fixedly connected to the middle of the H-shaped tube.

[0010] Preferably, the buoyancy control component further includes a sealing sleeve, and two positioning retaining rings are provided on the water intake section. The two positioning retaining rings are respectively arranged on the upper and lower sides of the H-shaped pipe, and the two positioning retaining rings are fixedly connected to the second end of the water intake section. Two sets of sealing sleeves are provided, one set of sealing sleeves is set for the water inlet section, and the other set of sealing sleeves is set for the water spray section. Each set of sealing sleeves includes two sealing sleeves. In the set of sealing sleeves corresponding to the water intake section, one sealing sleeve is arranged on the upper part of the H-shaped pipe and is fitted onto the water intake section. The lower end of the sealing sleeve is fixedly connected to the upper end of the H-shaped pipe and the upper end of the sealing sleeve is fixedly connected to the water intake section. The other sealing sleeve is arranged on the lower part of the H-shaped pipe and is fitted onto the water intake section. The upper end of the sealing sleeve is fixedly connected to the lower end of the H-shaped pipe and the lower end of the sealing sleeve is fixedly connected to the water intake section. In a set of sealing sleeves corresponding to the water spray section, one sealing sleeve is arranged on the upper part of the H-shaped pipe and is fitted onto the water spray section. The lower end of the sealing sleeve is fixedly connected to the upper end of the H-shaped pipe, and the upper end of the sealing sleeve is fixedly connected to the water spray section. The other sealing sleeve is arranged on the lower part of the H-shaped pipe and is fitted onto the water spray section. The upper end of the sealing sleeve is fixedly connected to the lower end of the H-shaped pipe, and the lower end of the sealing sleeve is fixedly connected to the water spray section.

[0011] Preferably, the buoyancy control component further includes a sealing ring, with two sets of sealing rings provided, one set of which is arranged between the H-shaped pipe and the water intake section to seal the space between the H-shaped pipe and the water intake section; Another set is arranged between the H-shaped pipe and the water spray section to seal the space between the H-shaped pipe and the water spray section.

[0012] Preferably, the spraying assembly further includes a sliding sleeve, an elastic element, and a pull rod. The outlet sidewall of the pumping pipe is provided with a spraying hole, and the sliding sleeve is slidably sleeved on the outer periphery of the pumping pipe to open or close the spraying hole. The pumping pipe is provided with a positioning boss on its outer periphery. The positioning boss is located above the sliding sleeve. The elastic element is sleeved on the outer periphery of the pumping pipe, and the upper end of the elastic element is connected to the positioning boss, while the lower end of the elastic element is connected to the sliding sleeve. The lower end of the pull rod is fixedly connected to the outer circumference of the sliding sleeve, and the upper end of the pull rod is fixedly connected to one of the buoyancy control components; when the buoyancy control component moves upward to close the corresponding water spray pipe, the sliding sleeve slides upward and opens the spray hole on the pump pipe.

[0013] Preferably, the drive assembly includes a winch and a wire rope. The winch is mounted on the hull, and a fixed pulley is provided on the support frame. The first end of the wire rope is wound around the winch, and the second end of the wire rope is fixedly connected to the top of the drill pipe cylinder after passing over the fixed pulley.

[0014] Preferably, the agitation assembly includes a drive shaft, a drive motor, and a stirring head. The drive shaft is coaxially rotatably connected to the drill rod cylinder. The drive motor is installed at the upper end of the drill rod cylinder, and the output end of the drive motor is coaxially and fixedly connected to the drive shaft. The lower end of the drive shaft is coaxially and fixedly connected to the stirring head.

[0015] The application of the technical solution of the present invention has the following beneficial effects: With the above structural improvements, when pressurized water is sprayed from the outlet of the spray pipe, the water at the outlet of the spray pipe is sprayed toward the outlet of the suction pipe, and a negative pressure suction force is generated at the outlet of the spray pipe toward the outlet of the suction pipe, thereby drawing the mud-water mixture located at the inlet of the suction pipe toward the outlet of the suction pipe, so that the mud-water mixture at the bottom of the drill pipe flows upward along the suction pipe. By arranging multiple water jets at intervals along the axis of the suction pipe, staged suction is achieved. This allows the mud-water mixture at the bottom of the drill pipe to be drawn up step by step through the suction pipe, successfully passing over the top of the drill pipe and extracting the mud-water mixture from the deep siltation at the bottom of rivers or lakes. Specifically, high-pressure water is sprayed at intervals along the axial direction of the suction pipe through multiple water jets, creating multiple stages of negative pressure within the suction pipe to achieve staged suction, effectively increasing the suction head and enabling the drill pipe vessel to exceed the ten-meter depth limit for efficient dredging of ultra-deep silt. The mud-water mixture then flows through the suction pipe to the suction pump, filling the pump's cavity. When the pump operates, it further generates suction force, further improving suction efficiency. This combined design allows for the extraction of silt from the bottom of the drill pipe even with an extended drill pipe, achieving the goal of deep dredging of deep siltation in rivers or lakes.

[0016] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a partial enlarged view of a dredging vessel used for ultra-deep drill pipe operations according to this application; Figure 2 This is a schematic diagram of the internal structure of the drill pipe cylinder in a dredging vessel used for ultra-deep drill pipe operations, as per this application. Figure 3 yes Figure 2 Enlarged view at point A in the middle; Figure 4 yes Figure 2 Enlarged view at point B; Figure 5 This is an enlarged view of a mixing head in a dredging vessel used for ultra-deep drill pipe operations, as described in this application. Figure 6 This is an enlarged view of the buoyancy control component and tie rod connection in a dredging vessel used for ultra-deep drill pipe operations according to this application; Figure 7This is a cross-sectional view of the mixing head in a dredging vessel used for ultra-deep drill pipe operations, as described in this application.

[0018] The components include: 1. Hull; 2. Support frame; 3. Drive assembly; 31. Winch; 32. Wire rope; 4. Drill rod cylinder; 5. Agitator assembly; 51. Drive shaft; 52. Drive motor; 53. Agitator head; 6. Spray assembly; 61. Pumping component; 62. Pumping pipe; 621. Spray hole; 622. Positioning boss; 63. Water spray pipe; 631. Water intake section; 6311. Positioning retaining ring; 632. Buoyancy control component; 6321. H-shaped pipe; 6322. Float; 6323. Counterweight; 6324. Sealing sleeve; 6325. Sealing ring; 633. Water spray section; 64. Sliding sleeve; 65. Elastic component; 66. Tie rod; 7. Suction assembly; 71. Suction pump; 72. Suction pipe; 721. Narrowing section. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more comprehensive description is provided below, along with preferred embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0021] Example: See Figures 1-7 This embodiment provides a dredging vessel for ultra-deep drill pipe operations, including a hull 1, a support frame 2, a drive assembly 3, a drill pipe cylinder 4, an agitation assembly 5, a jetting assembly 6, and a suction assembly 7. The support frame 2 is arranged along the height direction, that is, along the vertical direction, and is fixedly connected to one end of the hull 1. The drill pipe cylinder 4 is slidably arranged on the support frame 2 along the height direction. Specifically, when the hull 1 is a powered hull 1, the support frame 2 is arranged at the front end of the hull 1 to avoid the propeller at the rear end of the hull 1. The drive assembly 3 is installed on the hull 1, and the drive assembly 3 is used to drive the drill pipe cylinder 4 to move up and down relative to the support frame 2 in the height direction. The drive assembly 3 drives the drill pipe cylinder 4 to move down along the support frame 2 to achieve downward drilling, so as to clean and dredge deep silt. The agitation component 5 is installed on the drill pipe body 4 and is used to drill and agitate the lower end of the drill pipe body 4, agitate and cut the silt at the front end of the drill pipe, so that the silt is broken up and mixed with water to form a highly fluid mixture. The suction assembly 7 includes a suction pump 71 and a suction pipe 72. The inlet end of the suction pipe 72 extends into the drill pipe cylinder 4 and extends to the lower end of the drill pipe cylinder 4. The outlet end of the suction pipe 72 is connected to the suction pump 71. The suction pump 71 and the suction pipe 72 are used to suction the mixture that has been dispersed by the agitation assembly 5 located below the drill pipe cylinder 4 and discharge it from the outlet end of the suction pump 71. A filter drum screen is provided on the hull 1. The mixture after being suctioned by the suction pump 71 is discharged into the drum screen and filtered by the drum screen. The coarse aggregate is filtered out and transported to the transport ship by a conveyor belt and then transported away to achieve the purpose of deep dredging of rivers and lakes. Specifically, the suction pump 71 is a centrifugal mud pump. Of course, in some other embodiments, the suction pump 71 can also be other centrifugal pumps. The jetting assembly 6 includes a pumping component 61, a pumping pipe 62, and a spray pipe 63. The outlet end of the pumping pipe 62 extends into the drill pipe body 4 and extends to the lower end of the drill pipe body 4. The inlet end of the pumping pipe 62 is connected to the pumping component 61. Specifically, the pumping component 61 is a water pump. The water in the river or lake is pressurized by the water pump and transported through the pumping pipe 62. Finally, it is sprayed out from the outlet end of the pumping pipe 62 and the outlet end of the spray pipe 63. When the pressurized water is sprayed out from the outlet end of the pumping pipe 62, it hydraulically cuts and agitates the silt located at the bottom of the drill pipe body 4. The first end of the water spray pipe 63 is connected to the pumping pipe 62, and the second end of the water spray pipe 63 extends into the suction pipe 72, with the second end of the water spray pipe 63 facing the outlet end of the suction pipe 72. Specifically, the water spray pipe 63 is radially inserted into the suction pipe 72, and the outlet of the water spray pipe 63 is arranged facing the outlet end of the suction pipe 72. Multiple water spray pipes 63 are provided, and the multiple water spray pipes 63 are distributed at intervals along the axis of the suction pipe 72.

[0022] Through continuous experimentation and research, it was found that if a centrifugal pump is directly installed at the outlet of the suction pipe 72 for suction, there is no water in the centrifugal pump in the initial state, resulting in the centerless pump running dry and unable to generate negative pressure. Consequently, it is impossible to suck up the silt at the lower end of the drill pipe 4. Moreover, the limited volume of the drill pipe 4 itself makes it impossible to install a conventional water pump inside the drill pipe 4 for pumping. Therefore, the existing conventional improvements cannot suck the mud-water mixture from the riverbed or lakebed and over the top of the drill pipe 4. Especially in the initial stage of drilling, the distance between the top of the drill pipe 4 and the river surface is relatively high, requiring a high suction head. The existing structure cannot smoothly pump the mud-water mixture to the top of the drill pipe 4, thus limiting the further lengthening of the drill pipe 4 and the dredging depth of the existing equipment, making it impossible to dredge river silt layers exceeding ten meters.

[0023] With the above structural improvement, when the pressurized water is sprayed out from the outlet of the water spray pipe 63, the water at the outlet of the water spray pipe 63 is sprayed toward the outlet of the suction pipe 72, and a negative pressure suction force is generated at the outlet of the water spray pipe 63 toward the outlet of the suction pipe 72, thereby drawing the mud-water mixture located at the inlet of the suction pipe 72 toward the outlet of the suction pipe 72, so that the mud-water mixture at the bottom of the drill pipe cylinder 4 flows upward along the suction pipe 72. By arranging multiple water jet pipes 63 at intervals along the axis of the suction pipe 72, staged suction is achieved, allowing the mud-water mixture located at the bottom of the drill pipe 4 to be drawn up stage by stage along the suction pipe 72 and successfully pass over the top of the drill pipe 4. This successfully extracts the mud-water mixture from the deep siltation at the bottom of the river or lake. Specifically, by spraying high-pressure water at intervals along the axis of the suction pipe 72 through multiple water jet pipes 63, multiple negative pressures are generated within the suction pipe 72, achieving staged suction and effectively increasing the suction head. This allows the drill pipe vessel to break through the ten-meter depth limit and achieve efficient dredging of ultra-deep silt. The mixture then flows along the suction pipe 72 to the suction pump 71, filling the cavity within the suction pump 71. When the suction pump 71 is running, it further generates suction force, thereby improving the suction efficiency. By combining the two designs, it is possible to extract the silt at the bottom of the drill pipe cylinder 4 even with the drill pipe cylinder 4 extended, thereby achieving the dredging of deep silt deposits in river channels or lake bottoms and achieving the purpose of deep dredging (deep dredging as referred to in this invention means a depth of more than ten meters underground).

[0024] Specifically, the support frame 2 is fixedly connected to the front end of the hull 1 along the height direction. A slide rail is provided on the support frame 2, and the drill pipe cylinder 4 is slidably connected to the support frame 2 along the height direction via the slide rail. A slider is provided on the outer periphery of the drill pipe cylinder 4, and the slider slides in cooperation with the slide rail. In some other embodiments of this application, the support frame 2 is provided with guide rods. Two guide rods are provided, arranged along the height direction and parallel to each other. The drill pipe cylinder 4 is positioned between the two parallel guide rods, and a guide assembly is provided on the outer periphery of the drill pipe cylinder 4. The guide assembly includes a mounting base and a guide wheel. The mounting base is welded to the outer periphery of the drill pipe cylinder 4, and the guide wheel is rotatably connected to the mounting base and abuts against the guide rod, so that the drill pipe cylinder 4 is guided by the interaction of the guide wheel and the guide rod. In another embodiment, the guide assembly can also be a guide slider, which slides in cooperation with the guide rod to guide the drill pipe cylinder 4.

[0025] It should be noted that, in this embodiment, a platform is provided on the hull 1, protruding upwards from the hull 1. The platform is fixedly connected to the bow end of the hull 1 by welding. The bottom of the support frame 2 is hinged to the platform above the hull 1. Specifically, the side of the support frame 2 away from the bow is hinged to the platform, and the side of the support frame 2 near the bow is fixedly connected to the platform by bolts. A hydraulic cylinder is also provided between the support frame 2 and the hull 1. The upper end of the hydraulic cylinder is hinged to the middle of the support frame 2, and the bottom of the hydraulic cylinder... The hydraulic cylinder is hinged to the support frame (in some other embodiments of this application, the lower end of the hydraulic cylinder may also be hinged to the hull 1). The hydraulic cylinder, support frame 2, and hull 1 form a triangular structure. When it is necessary to drive the support frame 2 to move, the bolts on the support frame 2 near the bow are removed. At this time, the hydraulic cylinder retracts, driving the support frame 2 to rotate around the hinge point between the support frame 2 and the support frame, thereby allowing the support frame 2 to rotate from a vertical state to a horizontal state, lowering the center of gravity of the support frame 2, which helps to improve the stability of the dredging vessel during movement and prevents the dredging vessel from encountering danger during movement. In use, the hydraulic cylinder extends to drive the support frame 2 to rotate in the opposite direction, changing from a horizontal state to a vertical state, in order to guide the drill pipe body, so that the drill pipe body 4 can drill downwards in a vertical direction to perform dredging work. At the same time, the support frame 2 and the support frame are locked and fixed by bolts, improving the connection stability between the support frame 2 and the support frame during operation.

[0026] It should also be noted that in some other embodiments of this application, the support frame 2 can also be directly fixed to the hull 1 by welding.

[0027] As a preferred embodiment, the water outlet of the water spray pipe 63 is provided with a constriction with a gradually decreasing diameter.

[0028] It is known that by making the water outlet end of the water spray pipe 63 into a gradually decreasing diameter constriction, the flow velocity of the water sprayed out by the water spray pipe 63 is further increased, the pressure difference that generates negative pressure is increased, and the suction capacity is improved.

[0029] In a preferred embodiment, the suction pipe 72 is provided with a constriction section 721. The constriction section 721 is arranged with a large diameter at both ends and a small diameter in the middle, and multiple constriction sections 721 are provided. The multiple constriction sections 721 are arranged one-to-one with multiple water spray pipes 63, and the middle constriction structure of the constriction section 721 corresponds to the water outlet end of the water spray pipe 63. Specifically, in this embodiment, the constriction section 721 and the suction pipe 72 are integrally provided; in some other embodiments of this application, the constriction section 721 can also be detachably connected to the suction pipe 72 by screws (not shown in the drawings).

[0030] With the above-mentioned constriction 721, when the water spray pipe 63 sprays high-pressure water toward the middle of the constriction 721, the Venturi effect can be used to generate a stronger negative pressure at the constriction 721, thereby further improving the suction efficiency of each stage of the spray assembly 6 and ensuring that the deep mud-water mixture can be reliably lifted step by step.

[0031] As a preferred embodiment, the water jet pipe 63 includes a water intake section 631, a buoyancy control component 632, and a water jet section 633. The first end of the water intake section 631 is connected to the pumping pipe 62, and the second end of the water intake section 631 is parallel to the drill pipe body 4 and extends along the drill pipe body 4. Specifically, the second end of the water intake section 631 extends upward. The first end of the water spray section 633 extends into the suction pipe 72, and the second end of the water spray section 633 is parallel to the second end of the water intake section 631 and extends in the same direction along the second end of the water intake section 631. The first end of the buoyancy control element 632 is slidably sleeved on the second end of the water inlet section 631, and the second end of the buoyancy control element 632 is slidably sleeved on the second end of the water spray section 633. Under the action of buoyancy, the buoyancy control element 632 slides upward, controlling the water inlet section 631 and the water spray section 633 to change from being connected to being closed. When the buoyancy control element 632 loses buoyancy, it slides downward under the action of gravity, controlling the water inlet section 631 and the water spray section 633 to change from being closed to being connected. It should be noted that in some other embodiments of this application, the second ends of the water inlet section 631 and the second ends of the water spray section 633 may also be configured to extend downward.

[0032] It should be noted that during the initial downward drilling of the drill pipe cylinder 4, the drill pipe is positioned at a relatively high height above the water surface. At this point, the mud-water mixture being pumped by the suction pipe 72 needs to reach a high lift and requires significant suction force to overcome the top of the drill pipe cylinder 4. The portion of the suction pipe 72 submerged underwater does not require suction; due to the principle of communicating vessels, the water surface inside the suction pipe 72 becomes level with the water surface in the river or lake. In other words, the water jet pipe 63 only provides effective suction for the portion above the water surface.

[0033] The design of the above structure allows for the automatic shut-off of the water-immersed spray pipe 63. Specifically, the buoyancy control component located at the lower part of the suction pipe 72, which is immersed in water, controls the corresponding water intake section 631 and spray section 633 to disconnect, thus shutting off the water-immersed spray pipe 63. This allows more water in the pumping pipe 62 to flow to the water-immersed spray pipe 63 on the water surface, thereby increasing the suction force of the water-immersed spray pipe 63 and improving the suction effect.

[0034] In a preferred embodiment, the buoyancy control component 632 includes an H-shaped tube 6321, a float 6322, and a counterweight 6323. The first end of the H-shaped tube 6321 is slidably sleeved on the second end of the water intake section 631, and the second end of the H-shaped tube 6321 is slidably sleeved on the second end of the water spray section 633. The float 6322 and the counterweight 6323 are fixedly connected to the middle of the H-shaped tube 6321. The H-shaped tube 6321 allows its two ends to be slidably sleeved on the second ends of the water intake section 631 and the water spray section 633, respectively. When the H-shaped tube 6321 slides downwards to its lower end, it connects the water intake section 631 and the water spray section 633, allowing water in the pumping pipe 62 to smoothly pass through the water intake section 631, the H-shaped tube 6321, and the water spray section 633 into the suction pipe 72. When the H-shaped pipe 6321 slides upward to the upper end, it closes the gap between the water inlet section 631 and the water spray section 633, preventing water in the water inlet section 631 from entering the water spray section 633.

[0035] It is understood that by installing the float 6322 and counterweight 6323 on the H-tube 6321, when the drill pipe body 4 moves downward and the float 6322 is submerged in water, the float 6322, under the action of buoyancy, drives the H-tube 6321 to move upward. The H-tube 6321 cuts off the corresponding controlled water intake section 631 and water spray section 633, preventing water from flowing from the water intake section 631 to the water spray section 633. When the drill pipe body 4 moves upward and the float 6322 floats out of the water, the weight of the float 6322 and counterweight 6323 drives the H-tube 6321 to move downward. The H-tube 6321 connects the corresponding controlled water intake section 631 and water spray section 633, allowing water from the corresponding water intake section 631 to flow smoothly to the water spray section 633 and be sprayed out from the outlet of the water spray section 633.

[0036] It is understood that by setting the buoyancy control component 632, the water spray pipe 63 located on the water surface is opened and water is sprayed through the buoyancy control component 632, and the water spray pipe 63 submerged in the water surface is closed through the buoyancy control component 632, so that more water in the pumping pipe 62 flows into the water spray pipe 63 located above the water surface, thereby enhancing the suction force in the suction pipe 72 located on the water surface, so that the mud-water mixture can be smoothly sucked over the top of the drill pipe cylinder 4 and smoothly extracted by the suction pump 71.

[0037] In a preferred embodiment, the buoyancy control component 632 further includes a sealing sleeve 6324. Two positioning retaining rings 6311 are provided on the water inlet section 631. The two positioning retaining rings 6311 are respectively arranged on the upper and lower sides of the H-shaped tube 6321, and the two positioning retaining rings 6311 are fixedly connected to the second end of the water inlet section 631. The two positioning retaining rings 6311 limit the vertical sliding distance of the H-shaped tube 6321, preventing the H-shaped tube 6321 from sliding off the water inlet section 631, which would cause the H-shaped tube 6321 and the water inlet section 631 to separate.

[0038] Two sets of sealing sleeves 6324 are provided. One set of sealing sleeves 6324 corresponds to the water intake section 631, and the other set corresponds to the water spray section 633. The sealing sleeves 6324 are made of rubber corrugated tubing. Their installation isolates the mud and water inside the drill pipe body 4, preventing them from entering the sliding joint between the H-shaped pipe 6321 and the water intake section 631. When mud and water enter this joint, the particles in the mud and water can easily cause jamming, leading to malfunctions. Protecting the sliding joint between the H-shaped pipe 6321 and the water intake section 631 with the sealing sleeves 6324 helps reduce the failure rate of this sliding joint. It should be noted that a sealing sleeve 6324 is also provided at the sliding joint between the H-shaped pipe 6321 and the water spray section 633.

[0039] Specifically, each set of sealing sleeves 6324 includes two sealing sleeves 6324. In the set of sealing sleeves 6324 corresponding to the water inlet section 631, one sealing sleeve 6324 is arranged on the upper part of the H-shaped pipe 6321 and is fitted onto the water inlet section 631. The lower end of the sealing sleeve 6324 is fixedly connected to the upper end of the H-shaped pipe 6321, and the upper end of the sealing sleeve 6324 is fixedly connected to the water inlet section 631. The other sealing sleeve 6324 is arranged on the lower part of the H-shaped pipe 6321 and is fitted onto the water inlet section 631. The upper end of the sealing sleeve 6324 is fixedly connected to the lower end of the H-shaped pipe 6321, and the lower end of the sealing sleeve 6324 is fixedly connected to the lower end of the H-shaped pipe 6321. The end is fixedly connected to the water inlet section 631; among a set of sealing sleeves 6324 corresponding to the water spray section 633, one sealing sleeve 6324 is arranged on the upper part of the H-shaped pipe 6321 and is fitted onto the water spray section 633, with the lower end of the sealing sleeve 6324 fixedly connected to the upper end of the H-shaped pipe 6321 and the upper end of the sealing sleeve 6324 fixedly connected to the water spray section 633; ​​the other sealing sleeve 6324 is arranged on the lower part of the H-shaped pipe 6321 and is fitted onto the water spray section 633, with the upper end of the sealing sleeve 6324 fixedly connected to the lower end of the H-shaped pipe 6321 and the lower end of the sealing sleeve 6324 fixedly connected to the water spray section 633.

[0040] In a preferred embodiment, the buoyancy control component 632 further includes a sealing ring 6325, which is provided in two sets, one set of which is arranged between the H-shaped pipe 6321 and the water inlet section 631 to seal the H-shaped pipe 6321 and the water inlet section 631. Another set is arranged between the H-shaped pipe 6321 and the water spray section 633 to seal the space between the H-shaped pipe 6321 and the water spray section 633.

[0041] By setting a sealing ring 6325, the sealing performance between the H-tube 6321 and the water inlet section 631 and the water spray section 633 can be effectively guaranteed during the up and down sliding process, preventing high-pressure water from leaking from the sliding gap. At the same time, the sliding stroke of the H-tube 6321 is limited to prevent it from coming off or being over-compressed, thereby improving the durability and reliability of the buoyancy control component 632.

[0042] In a preferred embodiment, the spray assembly 6 further includes a sliding sleeve 64, an elastic element 65, and a pull rod 66. A spray hole 621 is provided on the side wall of the water outlet end of the pumping pipe 62. The sliding sleeve 64 is slidably sleeved on the outer periphery of the pumping pipe 62 to open or close the spray hole 621. When the sliding sleeve 64 slides upward, the spray hole 621 is opened, and at this time the water in the pumping pipe 62 can be smoothly sprayed out from the spray hole 621.

[0043] A positioning boss 622 is provided on the outer periphery of the pumping pipe 62. The positioning boss 622 is located above the sliding sleeve 64. An elastic element 65 is sleeved on the outer periphery of the pumping pipe 62, and the upper end of the elastic element 65 is connected to the positioning boss 622, while the lower end of the elastic element 65 is connected to the sliding sleeve 64. The lower end of the pull rod 66 is fixedly connected to the outer periphery of the sliding sleeve 64, and the upper end of the pull rod 66 is fixedly connected to one of the buoyancy control components 632. When the buoyancy control component 632 moves upward to close the corresponding water spray pipe 63, the sliding sleeve 64 slides upward and opens the spray hole 621 on the pumping pipe 62. Specifically, in this embodiment, the pull rod 66 is detachably connected to the buoyancy control component 632 on the water spray pipe 63 corresponding to the middle position of the drill pipe body 4. When the drill pipe 4 drills downwards and reaches the water surface at the middle position of the drill pipe 4, the buoyancy control element 632 in the water spray pipe 63 corresponding to the middle position of the drill pipe 4 moves upwards relative to the drill pipe 4, which in turn moves the pull rod 66 upwards relative to the drill pipe 4. This pulls the sliding sleeve 64 upwards relative to the pumping pipe 62, opening the spray hole 621, allowing high-pressure water in the pumping pipe 62 to be sprayed downwards from the spray hole 621, performing hydraulic cutting and stirring of the silt at the bottom of the drill pipe 4. When the drill pipe 4 is pulled upwards, the sliding sleeve 64 returns to its original position under the elastic force of the elastic element 65. The elastic element 65 is a compression helical spring.

[0044] It should be noted that during the initial drilling and dredging phase of the drill pipe body 4 and the agitator assembly, the drill pipe body 4 drills to a shallow depth, resulting in a larger portion of the drill pipe body 4 above the water surface and a higher suction head from the suction pipe 72. Therefore, the pumping pipe 62 needs to deliver as much water as possible to the spray pipe 63 for suction within the suction pipe 72. However, when the drill pipe body 4 drills to a deeper depth, the portion of the drill pipe body 4 above the water surface decreases, and the suction head from the suction pipe 72 is lower. Since the deep sediments at the bottom of the drill pipe body 4 require high water pressure for hydraulic cutting, the pumping pipe 62 needs to deliver pumped water to the spray hole 621 at the front end of the pumping pipe 62 for hydraulic cutting and agitation.

[0045] The above structural design perfectly fulfills this requirement. Specifically, in the initial stage of drilling, most of the drill pipe 4 is located above the water surface. At this time, sufficient suction force is required. The jet holes 621 on the pumping pipe 62 are closed, and all the water jet pipes 63 located above the water surface are open. All the water in the pumping pipe 62 is sprayed towards the water outlet of the suction pipe 72 through multiple water jet pipes 63. The suction force generated by the water jet pipes 63 arranged at intervals on the suction pipe 72 is used to draw the mud-water mixture at the bottom of the drill pipe 4, giving it sufficient suction force. When the drill pipe body 4 is drilled to half its depth, the buoyancy control component 632 located in the middle of the drill pipe body 4 moves the H-shaped pipe 6321, the tie rod 66 and the sleeve upward relative to the drill pipe body 4 under the action of water buoyancy. This causes the water spray pipe 63 below the water surface to close while the spray hole 621 opens. This allows part of the high-pressure water in the pumping pipe 62 to be sprayed into the suction pipe 72 through the water spray pipe 63 above the water surface to suck up the deep mud-water mixture. Another part of the high-pressure water is sprayed downward through the spray hole 621 to hydraulically cut and agitate the silt at the bottom of the drill pipe body 4, so that the silt and water are fully mixed and can be easily extracted through the suction pipe 72.

[0046] In a preferred embodiment, the drive assembly 3 includes a winch 31 and a wire rope 32. The winch 31 is mounted on the hull 1, and a fixed pulley is provided on the support frame 2. The first end of the wire rope 32 is wound around the winch 31, and the second end of the wire rope 32 is fixedly connected to the top of the drill pipe cylinder 4 after passing over the fixed pulley.

[0047] When it is necessary to control the drill pipe cylinder 4 to move upward, the winch 31 in the drive assembly 3 operates, winding the wire rope 32. The wire rope 32 lifts the drill pipe cylinder 4 upward, causing it to move upward relative to the support frame 2. When it is necessary to control the drill pipe cylinder 4 to move downward, the winch 31 in the drive assembly 3 unwinds the wire rope 32, lowering the drill pipe cylinder 4. The drill pipe cylinder 4 moves downward automatically under gravity. By changing the direction of force transmission of the wire rope 32 through the fixed pulley, the tension of the winch 31 pulls the drill pipe cylinder 4 up and down along the support frame 2.

[0048] Of course, in some other embodiments of this application, the drive component 3 can also be a hydraulic cylinder, with one end of the hydraulic cylinder hinged to the support frame 2 and the second end of the hydraulic cylinder hinged to the outer wall of the drill pipe cylinder 4, so that the drill pipe cylinder 4 can be directly driven to move up and down along the support frame 2 by the hydraulic cylinder.

[0049] In a preferred embodiment, the agitation assembly 5 includes a drive shaft 51, a drive motor 52, and a stirring head 53. The drive shaft 51 is coaxially rotatably connected to the drill rod cylinder 4. The drive motor 52 is installed at the upper end of the drill rod cylinder 4, and the output end of the drive motor 52 is coaxially fixedly connected to the drive shaft 51. The lower end of the drive shaft 51 is coaxially fixedly connected to the stirring head 53.

[0050] It is understood that the drive motor 52 drives the transmission shaft 51 to rotate, which in turn drives the stirring head 53 to rotate. The stirring head 53 is a conical head with the tip of the conical head pointing downwards. The drive motor 52 drives the stirring head 53 to rotate through the transmission shaft 51 to cut and agitate the silt at the bottom of the drill pipe cylinder 4. By cutting and agitating, the silt is broken up, and the silt and water are mixed to form a mud-water mixture, which is then easily drawn upwards by the suction pipe 72.

[0051] The working principle and basic operation process of this invention are as follows: The drive assembly 3 drives the drill rod cylinder 4 to move downwards, and the drive motor 52 drives the transmission shaft 51 to rotate the stirring cutter head 53, cutting and agitating the silt at the bottom of the drill rod cylinder 4. The spray assembly 6 works, and the pumping component 61 pumps high-pressure water into the pumping pipe 62 and the spray pipe 63. In the initial state, the spray hole 621 is closed, and all the spray pipes 63 are open. The water in the pumping pipe 62 is sprayed from each spray pipe 63 into the suction pipe 72. When the spray pipe 63 sprays high-pressure water into the suction pipe 72, a negative pressure is generated, realizing the suction function. The multiple spray pipes 63 arranged at intervals along the axis of the suction pipe 72 form a step-by-step upward suction, so that the mud-water mixture at the bottom of the drill rod cylinder 4 can be smoothly sucked over to the top of the drill rod cylinder 4, and further pumped to the drum screen for filtration by the suction pump 71. As the drill pipe 4 gradually drills downwards, the water jet pipe 63 located at the bottom of the drill pipe 4 gradually submerges below the water surface. When the water jet pipe 63 is submerged, the float 6322 in the corresponding water jet pipe 63 moves downwards at a slower speed due to buoyancy, while the corresponding water intake section 631 and water jet section 633 move downwards at a constant speed. That is, the water intake section 631 and water jet section 633 move downwards relative to the float 6322 and H-shaped pipe 6321, which is equivalent to the H-shaped pipe 6321 moving upwards relative to its corresponding water intake section 631 and water jet section 633. This causes the water jet pipe 63 submerged below the water surface to change from a connected state to a closed state, allowing more water in the pumping pipe 62 to be sprayed from the water jet pipe 63 above the water surface toward the suction pipe 72, so that the suction pipe 72 above the water surface can obtain a greater suction force.

[0052] When the drill pipe 4 is lowered to the water surface and level with the float 6322 connected to the tie rod 66, the float 6322 pulls the tie rod 66 upward relative to the pumping pipe 62. At this time, the jet hole 621 is opened, and part of the water in the pumping pipe 62 is ejected from the jet hole 621 to perform hydraulic cutting and stirring of the silt at the bottom of the drill pipe 4; another part of the water in the pumping pipe 62 is ejected from the water spray pipe 63 located on the water surface to continue to create negative pressure in the suction pipe 72 to suck up the mud-water mixture at the bottom of the drill pipe 4.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dredging vessel for ultra-deep drilling operations, characterized in that: It includes a hull, a support frame, a drive assembly, a drill pipe cylinder, an agitation assembly, a jetting assembly, and a suction assembly. The support frame is arranged along the height direction and is fixedly connected to one end of the hull. The drill pipe cylinder is slidably arranged on the support frame along the height direction. The drive assembly is mounted on the hull and is used to drive the drill pipe cylinder to move up and down along the height direction; The agitation assembly is installed on the drill pipe body and is used to drill and agitate the lower end of the drill pipe body; The suction assembly includes a suction pump and a suction pipe. The inlet end of the suction pipe extends into the drill pipe body and extends to the lower end of the drill pipe body. The outlet end of the suction pipe is connected to the suction pump. The jetting assembly includes a pumping component, a pumping pipe, and a water spray pipe. The outlet end of the pumping pipe extends into the drill pipe body and extends to the lower end of the drill pipe body. The inlet end of the pumping pipe is connected to the pumping component. The first end of the spray pipe is connected to the pumping pipe, and the second end of the spray pipe extends into the suction pipe, with the second end of the spray pipe facing the outlet end of the suction pipe. The water spray pipe is provided in multiple parts, and the multiple water spray pipes are distributed at intervals along the axis of the suction pipe; The water spray pipe includes a water intake section, a buoyancy control component, and a water spray section. The first end of the water intake section is connected to the pumping pipe, and the second end of the water intake section is parallel to the drill pipe body and extends along the drill pipe body. The first end of the spray section extends into the suction pipe, and the second end of the spray section is parallel to the second end of the water intake section and extends in the same direction along the second end of the water intake section. The first end of the buoyancy control component is slidably sleeved on the second end of the water intake section, and the second end of the buoyancy control component is slidably sleeved on the second end of the water spray section. Under the action of buoyancy, the buoyancy control component slides from bottom to top, controlling the water intake section and the water spray section to change from being connected to being closed.

2. A dredging vessel for ultra-deep drilling operations according to claim 1, characterized in that: The water outlet of the spray pipe is provided with a constriction with a gradually decreasing diameter.

3. A dredging vessel for ultra-deep drilling operations according to claim 2, characterized in that: The suction pipe is provided with a constriction section, which is arranged with a large diameter at the top and bottom ends and a small diameter in the middle. Multiple constriction sections are provided, and each of the multiple constriction sections is arranged in a one-to-one correspondence with multiple water spray pipes. The middle constriction structure of the constriction section corresponds to the water outlet end of the water spray pipe.

4. A dredging vessel for ultra-deep drilling operations according to any one of claims 1-3, characterized in that: The buoyancy control component includes an H-shaped tube, a float, and a counterweight. The first end of the H-shaped tube is slidably sleeved on the second end of the water intake section, and the second end of the H-shaped tube is slidably sleeved on the second end of the water spray section. The float and the counterweight are fixedly connected to the middle of the H-shaped tube.

5. A dredging vessel for ultra-deep drilling operations according to claim 4, characterized in that: The buoyancy control component also includes a sealing sleeve. The water intake section is provided with two positioning retaining rings. The two positioning retaining rings are respectively arranged on the upper and lower sides of the H-shaped pipe, and the two positioning retaining rings are fixedly connected to the second end of the water intake section. Two sets of sealing sleeves are provided, one set of sealing sleeves is provided corresponding to the water inlet section, and the other set of sealing sleeves is provided corresponding to the water spray section; Each set of sealing sleeves includes two sealing sleeves. In the set of sealing sleeves corresponding to the water inlet section, one sealing sleeve is arranged on the upper part of the H-shaped pipe and is fitted onto the water inlet section. The lower end of the sealing sleeve is fixedly connected to the upper end of the H-shaped pipe, and the upper end of the sealing sleeve is fixedly connected to the water inlet section. The other sealing sleeve is arranged on the lower part of the H-shaped pipe and is fitted onto the water inlet section. The upper end of the sealing sleeve is fixedly connected to the lower end of the H-shaped pipe, and the lower end of the sealing sleeve is fixedly connected to the water inlet section. In a set of sealing sleeves corresponding to the water spray section, one of the sealing sleeves is arranged on the upper part of the H-shaped pipe and is fitted onto the water spray section. The lower end of the sealing sleeve is fixedly connected to the upper end of the H-shaped pipe, and the upper end of the sealing sleeve is fixedly connected to the water spray section. The other sealing sleeve is arranged on the lower part of the H-shaped pipe and is fitted onto the water spray section. The upper end of the sealing sleeve is fixedly connected to the lower end of the H-shaped pipe, and the lower end of the sealing sleeve is fixedly connected to the water spray section.

6. A dredging vessel for ultra-deep drilling operations according to claim 4, characterized in that: The buoyancy control component also includes a sealing ring, and two sets of the sealing ring are provided, one set of which is arranged between the H-shaped pipe and the water intake section to seal the H-shaped pipe and the water intake section. Another set is arranged between the H-shaped pipe and the water spray section to seal the space between the H-shaped pipe and the water spray section.

7. A dredging vessel for ultra-deep drilling operations according to any one of claims 1-3, characterized in that: The spraying assembly also includes a sliding sleeve, an elastic element, and a pull rod. The outlet end sidewall of the pumping pipe is provided with a spraying hole. The sliding sleeve is slidably sleeved on the outer periphery of the pumping pipe to open or close the spraying hole. The pumping pipe is provided with a positioning boss on its outer periphery. The positioning boss is located above the sliding sleeve. The elastic element is sleeved on the outer periphery of the pumping pipe, and the upper end of the elastic element is connected to the positioning boss, while the lower end of the elastic element is connected to the sliding sleeve. The lower end of the pull rod is fixedly connected to the outer periphery of the sliding sleeve, and the upper end of the pull rod is fixedly connected to one of the buoyancy control components; when the buoyancy control component moves upward to close the corresponding water spray pipe, the sliding sleeve slides upward and opens the spray hole on the pumping pipe.

8. A dredging vessel for ultra-deep drilling operations according to any one of claims 1-3, characterized in that: The drive assembly includes a winch and a wire rope. The winch is mounted on the hull, and a fixed pulley is provided on the support frame. The first end of the wire rope is wound around the winch, and the second end of the wire rope passes over the fixed pulley and is fixedly connected to the top of the drill pipe cylinder.

9. A dredging vessel for ultra-deep drilling operations according to any one of claims 1-3, characterized in that: The agitation assembly includes a drive shaft, a drive motor, and a stirring head. The drive shaft is coaxially rotatably connected to the drill pipe body. The drive motor is installed at the upper end of the drill pipe body, and the output end of the drive motor is coaxially and fixedly connected to the drive shaft. The lower end of the drive shaft is coaxially and fixedly connected to the stirring head.

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