High-efficiency low-interference drilling-embedding integrated equipment and method for submarine pipe cable

Abstract

The invention discloses efficient low-interference drilling-embedding integrated equipment and method for submarine pipe cables. The efficient low-interference drilling-embedding integrated equipment comprises a top vibration drill bit system, a built-in propelling system, a base counter-force system and a pipeline system. The top vibration drill bit system is located at the foremost portion, and the tail is connected with the built-in propelling system through a threaded structure gasket. The build-in propulsion system is connected with the pipeline system through a suspension gasket; the pipeline system penetrates through a circular door opening in the front end of the base counterforce system and extends out of the sea surface; the base counterforce system is located at the tail of the device. A pipe cable embedding channel is formed in a vibration jacking mode, a compaction mode and a wriggling propelling mode, and surrounding sediments are reinforced through wall protection slurry permeation to guarantee the stability of the channel. By arranging the pipe cable frameworks which are connected end to end through the torsion telescopic links, a telescopic pipeline group is formed, and pipeline damage caused by external force pulling is avoided. According to the invention, seabed ecological damage caused by excavation, laying and burying in a traditional mode can be avoided, and the equipment and the method which are high in efficiency and are used for synchronous construction of drilling and burying are provided.

Description

Technical Field

[0001] The present invention relates to the technical field of marine engineering equipment, in particular to the technical field of near-sea and offshore submarine engineering pipe and cable burial, and specifically to an integrated equipment and method for high-efficiency and low-disturbance drilling-burying of submarine pipes and cables. Background Art

[0002] The construction of offshore wind power and oil and gas exploration projects is in full swing around the world, and information communication and energy transportation between cross-sea regions are becoming increasingly close. In 2024, the increase in offshore oil and gas reserves and production will continue to advance. In the first three quarters of 2024, the output of offshore crude oil and natural gas increased by 5.9% and 8.8% year-on-year respectively. The supply of offshore wind power is growing rapidly. In the first three quarters of 2024, the output of offshore wind power increased by 29.5% year-on-year. The 16.6-megawatt floating wind turbine was in operation and successfully resisted the impact of the super typhoon "Makar". In 2024, my country's offshore wind power installed capacity is expected to exceed 45 million kilowatts, ranking first in the world for four consecutive years, and the cumulative grid-connected capacity will reach 39.1 million kilowatts. As of the third quarter of 2024, my country's cumulative installed capacity of offshore wind power has ranked first in the world for three consecutive years, exceeding the total grid-connected offshore wind power of the 2nd to 5th countries.

[0003] In today's maritime power context, offshore wind power, drilling platform facilities and equipment have also put forward higher requirements for the laying equipment and quality of security pipes and cables such as power supply, information transmission, and gas, liquid and solid multi-form transportation. China started late in the field of offshore wind power and lacked a solid technical foundation. The rapid development of related industries has exposed the pain points of backward key equipment and poor construction quality. In the past decade, due to the lack of efficient equipment and technology, tens of thousands of kilometers of cables and pipelines were laid on the seabed using simple processes, resulting in a significant decrease in construction efficiency, complex engineering interfaces, and frequent safety hazards. Many European and American companies have developed submarine operation equipment dedicated to the laying of submarine cables and pipelines. They are updated and iterated rapidly, and the level of intelligent technology and equipment is high. The technical and industrialization barrier effect on my country is becoming increasingly obvious.

[0004] Therefore, at this stage, there is an urgent need for an efficient and environmentally friendly submarine pipeline, cable, and wire laying equipment and solution to ensure the transportation quality of offshore wind power and oil and gas extraction and improve the level of marine economic development. Some existing domestic patent technologies have proposed many effective solutions. Considering the complexity of the marine environment and the economy of construction, the relevant technologies still have major problems and need to be further improved: 1. Traditional pipeline and cable laying equipment (submarine trenchers, etc.) relies on counterweights to carry pipes and cables to the seabed, uses high-pressure water jets to flush the sediment on the seabed, forms a pipe and cable trench, lays pipes and cables through the wire holes, and uses mechanical action to cover the sediment on both sides on the pipes and cables. In this mode, laying cables and pipelines and excavating seabed sediments will lead to widespread seabed plumes, seriously damaging the seabed ecology; 2. The sediments laid on the pipeline again have been severely disturbed, and their compact structure has been destroyed; under the action of ocean currents, scouring gullies are easily generated around the pipeline, which reduces the effective burial depth and eventually causes the pipeline to be exposed to seawater, reducing the service life of the pipeline and cable; 3. At present, most of the optimized construction methods based on excavation and secondary burial are necessary to conduct long-distance surveys along the pipelines and cables, clean up fishing nets and fishing gear, conduct long-term ship channel excavation and maritime alert. This not only wastes a lot of manpower and material resources, but also affects the normal navigation of other ships at sea, bringing many inconveniences; 4. In order to protect the safety of submarine cables, they are armored during construction. The closer to the shore, the thicker the armor. Too thick armor not only increases the material cost of the cable, but also increases the difficulty of laying the cable and the transportation cost. Summary of the invention

[0005] Based on the problems and shortcomings of the above-mentioned existing patent technologies in terms of efficiency, effect and environmental benefits of the burial of pipes and cables, the present invention proposes an integrated equipment and method for high-efficiency and low-disturbance drilling-burial of submarine pipes and cables. The present invention uses the vibration and extrusion of the top vibration drill bit system to enable the device to drill holes under the seabed, effectively avoiding ecological damage such as large-scale diffusion of plumes, habitat damage, mechanical crushing or burial of submarine organisms caused by the submarine trenching-pipeline laying-burial mode. Because this method does not disturb the soil on the surface of the seabed, the top surface of the burial is not easily eroded by ocean currents, and the long-term effectiveness of the burial can be guaranteed without additional reinforcement measures.

[0006] In view of the above technical problems, the specific technical solution adopted by the present invention is: An integrated equipment for high-efficiency and low-disturbance drilling and burying of submarine cables, characterized by comprising a top-vibration drill bit system, an embedded propulsion system, a base reaction force system, and a pipeline system; The top vibration drill head system is located at the front of the entire device, and its rear is connected to the embedded propulsion system through a threaded structure gasket; the embedded propulsion system is connected to the pipeline system through a hanging gasket; the pipeline system extends out of the sea surface through the circular door opening at the front end of the base reaction force system or is directly connected to the electrical equipment pipeline outlet; the base reaction force system is located at the rear of the device; The top vibration drill bit system comprises a forward soil cutting knife, a lateral soil cutting knife, a soil squeezing cone top, a wall protection slurry outlet, a wall protection slurry conduit, a jacking body, a forward vibration hammer, a lateral vibration arm, a comprehensive vibration machine, a top vibration correction row of rods, and a positioning device; the forward soil cutting knife is in a "cross" shape, fixed on the soil squeezing cone top and the tail is connected to the lateral soil cutting knife; a total of four lateral soil cutting knives are fixed on the front end of the jacking body; four wall protection slurry conduits are arranged inside the jacking body, and three rows of wall protection slurry outlets are arranged on the wall protection slurry conduits, and the wall protection slurry outlets are on either side of each lateral soil cutting knife on the outer surface of the jacking body; a comprehensive vibration machine is arranged inside the front end of the jacking body, one end of the forward vibration hammer is fixedly connected to the soil squeezing cone top, and the other end is connected to the comprehensive vibration machine; the comprehensive vibration machine is connected to the jacking body through the lateral vibration arm, and the top vibration correction row of rods can be extended and retracted under the action of hydraulic pressure, connecting the front end of the jacking body with the rear end of the jacking body; the positioning device is fixed at the rear end of the jacking body; The embedded propulsion system comprises a threaded structure gasket, an embedded support arm tube, a jacking support arm tube, a traction support arm tube, an embedded hydraulic rod, a jacking hydraulic rod, a traction hydraulic rod, and a hanging gasket; the threaded structure gasket fixes the embedded support arm tube, the jacking support arm tube, and the traction support arm tube to the rear end of the jacking body in sequence; the hanging gasket fixes the pipeline system to the rear end of the embedded propulsion system; The base reaction force system includes a base back plate, a hydraulic correction push rod, a soil embedded grid plate, a fixed frame, a circular door opening, a bottom contact bottom plate, and a link tightening ring; the link tightening ring is located at the head end of the base reaction force system, and can be used to embed the torsion and telescopic link to prevent it from continuing to twist; the circular door opening is sleeved on the rear part of the link tightening ring, and the fixed frame connects the circular door opening with the bottom contact bottom plate; the head end of the hydraulic correction push rod is fixed on the link tightening ring, and the tail end is fixed on the base back plate, and the angle between the link tightening ring and the base back plate can be controlled by hydraulic pressure, so as to realize the control of the propulsion direction of the torsion and telescopic link; The pipeline system includes a laying pipeline, a slurry-electricity supply composite line, a control steel cable, a flexible pipeline sleeve, and a torsional expansion and contraction link; the torsional expansion and contraction link is wrapped in the flexible pipeline sleeve, and the flexible pipeline sleeve and the core outer wall of the pipeline composed of multiple torsional expansion and contraction links connected front and back extend through a circular doorway to extend above the sea surface; the laying pipelines are deep-sea and shallow coastal wind power cables, offshore oil and gas transportation micro-pipelines, submarine optical cables and power supply lines for facilities and equipment; the control steel cable passes through the center of the cross-section of the torsional expansion and contraction pipe wall system, with its head end fixed on a threaded structure gasket and the other end extending above the sea surface through the circular doorway; the slurry-electricity supply composite line supplies slurry and electric energy to the front top vibration drill bit system and the embedded propulsion system, and its head end eventually forms a branch connection wall protection slurry conduit and a comprehensive vibrator.

[0007] A high-efficiency and low-disturbance integrated drilling and burying equipment for submarine cables, characterized in that the above-mentioned torsion and telescopic links can be connected in series through a control steel cable at a central position to wrap the pipeline system, and the pipeline system is connected to the suspension gasket at the tail of the embedded propulsion system through a channel reserved in the torsion and telescopic link; the torsion and telescopic link is longitudinally provided with a telescopic landslide ring foot, a retention step, a limiting channel, and a concave platform in the ring; the telescopic landslide ring foot is a wedge-shaped semicircular ring with two right-angled sides facing each other, and a pair of telescopic landslide ring feet are longitudinally arranged in opposite diameters on a torsion and telescopic link; preferably, a limiting device is provided at the tip of the telescopic landslide ring foot and the top of the concave platform in the ring to protect the link from misalignment; the limiting channel is provided on the side of the tail of the telescopic landslide ring foot, and the torsion and telescopic link can be fixed under the embedding of the hydraulic ejector of the link tightening ring.

[0008] A high-efficiency and low-disturbance integrated drilling and burying equipment for submarine cables, characterized in that the above-mentioned embedded support arm tubes, jacking support arm tubes, and traction support arm tubes have a slight external arch, and the arch height will increase under the action of external force, so that they are embedded in the sediment soil, thereby achieving the effect of self-anchoring the embedded propulsion system, and the adhesion between the sediment prevents the top vibration drill bit system from twisting and slipping during the process of advancing and laying the pipeline; in addition, the embedded support arm tubes, jacking support arm tubes, and traction support arm tubes provide reaction force for the jacking work of the top vibration drill bit system.

[0009] A high-efficiency and low-disturbance integrated drilling and burying equipment for submarine cables, characterized in that the above-mentioned integrated vibrator has a maximum vibration power of ≥100 kilowatts, a vibration frequency of 30-50 Hz, and an amplitude of 10-15 mm; the vibration generated by the integrated vibrator is transmitted to the side wall of the jacking body through the lateral vibration arm, and the top of the soil-extruding cone is driven to vibrate through the forward vibration hammer to complete the vibration propulsion.

[0010] A high-efficiency and low-disturbance integrated drilling and burying equipment for submarine cables, characterized in that the wall protection slurry is stored in the wall protection slurry conduit and ejected from the wall protection slurry outlet; the wall protection slurry working pressure is 200-600kPa, and the wall protection slurry adopts seawater: bentonite = 7-9:1.

[0011] A high-efficiency and low-disturbance integrated drilling and burying equipment for submarine cables, characterized in that the laid pipelines include cables with a diameter of 20-100 mm and pipes with a diameter of 80-250 mm; the buried pipelines are a maximum of 6 strands, and the pipeline D value (ratio of bending radius to pipeline diameter) of the laid pipelines is 1.0-2.0; the buried pipelines and torsion and telescopic links are nested inside the flexible pipeline sleeve, the head end is located above the sea level, and extends to the suspension gasket with the buried pipeline, is folded outward after non-fixed suspension, and the end is fixedly connected to the circular doorway, forming a double-layer casing structure under the seabed.

[0012] An integrated equipment for high-efficiency and low-disturbance drilling and burying of submarine cables, characterized in that the outer surfaces of the forward soil cutting knife, the lateral soil cutting knife, the soil squeezing cone top and the jacking body in the top vibration drill bit system are all designed with smooth surfaces, and at the same time, a nickel-tungsten alloy coating is deposited on the metal surface by an electrochemical method, and its hardness is greater than 550HV and the wear rate is ≤1.25*10 -5 mm 3 / N·m; a layer of wear-resistant self-lubricating modified coating is formed by controlling the penetration of 20-50 µm thick submicron-level fluorine-containing polymer particles; the embedded support arm tube, the jacking support arm tube, the traction support arm tube, and the torsion and telescopic links are made of one or more of ABS plastic, polyester elastomer (TPE), and nylon; the contact surfaces of the embedded support arm tube, the jacking support arm tube, the traction support arm tube, and the base reaction force system with the sediment are designed with rough surfaces, holes, or raised surfaces to increase the contact area with the sediment.

[0013] A high-efficiency and low-disturbance integrated drilling and burying equipment for submarine cables, characterized in that the tightening ring of the above-mentioned link is provided with a tightening attachment head, a hydraulic rod, and a pressure rod steering shaft, and the tightening attachment head can be extended or retracted under the action of hydraulic pressure; when the tightening attachment head is extended into the limiting hole of the torsion and telescopic link, the link is locked and cannot rotate freely; under the reverse pulling force of the control steel cable line and the forward pulling force of the top vibration drill bit system, the control pipeline system is spirally extended or retracted.

[0014] The above-mentioned base reaction system, pipeline system, embedded propulsion system, and top vibration drill bit system form a closed working chamber below the seabed; the bottom-touching base plate is a cantilever structure, which can be embedded in the soil at the bottom to ensure that the base reaction system has sufficient anti-torsion force; the soil-embedded grid plate is fixedly connected to the back of the base back plate, and a grid-like sediment channel is left in the middle, which can enhance the embedding force after the base reaction system sinks into the soil.

[0015] A method for burying submarine cables using an integrated equipment for high-efficiency and low-disturbance drilling and burying of submarine cables, the method comprising the following steps: Step 1: An integrated submarine cable drilling and burial equipment with high efficiency and low disturbance is transported to a designated area by an offshore mother ship. A pit is dug on the seabed using a grab bucket of the mother ship. The operator lowers the device into the predetermined pit using a crane on the offshore mother ship. The positioning device starts working to achieve real-time position tracking of lowering, working, and recovery. Step 2: The operator controls the steel cable through mechanical pre-tensioning, and at the same time controls the link tightening ring to fix the tail link, so that the relative rotation angle of the front torsion and telescopic link returns to zero. At this time, the outer wall of the pipeline core formed by the torsion and telescopic link is in the shortest state, and the reaction force generated by the propulsion will be finally transmitted to the base back plate along the torsion and telescopic link, link tightening ring, circular door opening, hydraulic correction push rod and fixed frame; Step 3: The integrated vibrator of the top vibration drill system starts to work, exerting vibration on the jacking body and the top of the soil extrusion cone; the soil structure is reconstructed with the sediments around the top vibration drill system under the action of vibration; at this time, the wall slurry is continuously pumped from the wall slurry conduit to the wall slurry outlet; the slurry splashes out from the wall slurry outlet, and after mixing with the sediment, a lubricating mud layer is formed on the surface of the top vibration drill system; at this time, the embedded hydraulic rod, the jacking hydraulic rod, and the traction hydraulic rod are in a retracted state and retracted, so that the embedded support arm tube, the jacking support arm tube, and the traction support arm tube are shortened longitudinally in turn, and expand and squeeze the soil laterally; then, under the action of thrust, the forward soil cutter and the lateral soil cutter cut the lubricating mud layer and prepare to move forward; Step 4: The top vibration correction rod of the top vibration drill bit system adjusts the head propulsion direction of the top vibration drill bit system according to the horizontal inclination angle of the annular rod belt formed by it, so that it remains horizontal or sets the pitch angle as required; the hydraulic correction rod of the base reaction force system adjusts the horizontal and vertical pitch angles of the tweezer ring according to the size of the hydraulic pressure to ensure that the reaction force is uniform and effective; Step 5: The embedded hydraulic rod, the jacking hydraulic rod, and the traction hydraulic rod are extended in sequence under hydraulic control, so that the embedded support arm tube, the jacking support arm tube, and the traction support arm tube are extended longitudinally in sequence; the link tightening ring rotates in the reverse direction to push the top vibration drill bit system forward, the link spacing is extended, and the elastic-plastic pressure wave outer casing is subjected to tension and continues to be laid forward; Step 6: The embedded hydraulic rod, the jacking hydraulic rod, and the traction hydraulic rod are retracted in sequence under hydraulic control, so that the embedded support arm tube, the jacking support arm tube, and the traction support arm tube are shortened longitudinally in sequence, and expand and squeeze the soil laterally; the link tightening ring is released, and the operator uses the pipeline arranging device to twist the pipeline around the control steel cable, and at the same time drives the twisting and telescopic link spirally forward, and the link spacing is retracted so that the twisting and telescopic link behind the link tightening ring is twisted and pushed to the front of the link tightening ring, and the circular door hole tightens the elastic-plastic pressure wave outer casing, and the retreat reaction force causes the elastic-plastic pressure wave outer casing to deform and squeeze the surrounding soil to form a sliding channel; Step 7: Tighten the link tweezer ring again, and repeat steps 5 and 6 to continue moving forward, and finally complete the pipeline laying; Step 8: The top vibration correction rod of the top vibration drill bit system adjusts the extension and retraction of the hydraulic rod so that the head of the top vibration drill bit system is lifted out of the seabed surface, and the top vibration drill bit system releases the connection with the elastic-plastic pressure wave outer casing and the torsional extension link; the operator uses the seabed recovery fixture to complete the recovery task of the top vibration drill bit system and the pipeline head.

[0016] By adopting the above technical solution, the beneficial technical effects of the present invention are: 1. The device and method of the present invention can complete the laying of pipes and cables without large-scale seabed excavation. The vibration, extrusion, and creeping action of the top-vibration drill bit system and the embedded propulsion system enable the device to drill holes under the seabed. It can effectively avoid the seabed environmental pollution (large-scale spread of plumes) and seabed ecological damage (damage to habitats, mechanical crushing or burial of seabed organisms) caused by traditional pipe and cable laying methods (seabed trenching, pipeline laying, and burial). In addition, the device and method of the present invention do not require long-distance surveys and cleaning of fishing nets and fishing gear along the pipelines and cables, and do not require long-term ship channel excavation and maritime warning measures, which reduces manpower and material costs and avoids long-term offshore construction control; 2. The present invention has outstanding advantages in terms of stability and durability of buried pipe and cable installation. First, the present invention uses a top-vibration drill bit system and an embedded propulsion system to exert a compacting effect on the seabed sediments, making the surrounding soil more compact and enhancing the wrapping of the seabed sediments on the pipes and cables. Under the action of the slurry pressure, the wall slurry penetrates into the deep-sea sediments and fills the pores between the sediments. Since the wall slurry has good bonding properties, it plays a secondary reinforcement role on the surrounding sediments, ensuring the stability of the pores and surrounding soil. In addition, since the soil on the surface of the seabed is not disturbed, the sediments still maintain their original tight structure, and at the same time solves the problem of uneven burial in the traditional operation mode, so that the buried top surface is not easily eroded by ocean currents, and no additional reinforcement measures are required; 3. The present invention adopts flexible pipeline sleeves and torsional expansion links to wrap submarine cables, forming a high-strength and tough protective layer, reducing the thickness of the cable armor, and reducing the material cost and transportation cost of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a side view of the overall structure of a submarine cable high-efficiency and low-disturbance drilling-burying integrated equipment of the present invention.

[0019] Figure 2 It is a centerline profile of an integrated equipment for high-efficiency and low-disturbance drilling and burying of submarine pipes and cables.

[0020] Figure 3 It is a cross-sectional view of the link clamp ring.

[0021] Figure 4 It is a schematic diagram of the telescopic torsion link structure.

[0022] Figure 5 Schematic diagram of the structure of the link tightening ring.

[0023] In the figure: 1- the top vibration drill bit system includes 101- a forward soil cutting knife, 103- a lateral soil cutting knife, 105- a soil squeezing cone top, 102- a wall slurry outlet, 107- a wall slurry conduit, 104- a jacking body, 106- a forward vibration hammer, 109- a lateral vibration arm, 108- a comprehensive vibration machine, 1010- a top vibration correction row rod, 1011- a positioning device; the embedded propulsion system 2 includes a threaded structure gasket 201, an embedded support arm tube 202, a jacking support arm tube 203, a traction support arm tube 204, an embedded hydraulic rod 205, a jacking hydraulic rod 206, a traction hydraulic rod 207, and a hanging gasket 208; 3- a base The reaction force system includes 301-base back plate, 302-hydraulic correction top rod, 303-soil embedded grid plate, 304-fixed frame, 305-circular door opening, 306-bottoming bottom plate, link clamping ring 307, 3071-clamping ring outer wall, 3072-clamping attachment head, 3073-hydraulic rod, 3074-pressure rod steering shaft; the pipeline system 4 includes laying pipeline 401, slurry-electricity supply composite line 403, control steel cable line 402, flexible pipeline sleeve 404, torsion telescopic link 405, 4051-limiting channel, 4052-ring inner concave platform, 4053-telescopic landslide ring foot, 4054-retention step. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "front", "back", "first", "last" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content. Example

[0026] like Figure 1-5As shown, the present invention includes a top vibration drill bit system 1, an embedded propulsion system 2, a base reaction force system 3, and a pipeline system 4.

[0027] like Figure 1-2 The 1-top vibration drill bit system includes a forward soil cutting knife 101, a lateral soil cutting knife 103, a soil squeezing cone top 105, a wall protection slurry outlet 102, a wall protection slurry conduit 107, a top driving body 104, a forward vibration hammer 106, a lateral vibration arm 109, a comprehensive vibrator 108, a top vibration correction row rod 1010, and a positioning device 1011; the forward soil cutting knife 101 is in a "cross" shape, fixed on the soil squeezing cone top 105 and the tail is connected to the lateral soil cutting knife 103; a total of four lateral soil cutting knives 103 are fixed on the front end of the top driving body 104; four wall protection slurry conduits 107 are arranged inside the top driving body 104, and four rows of wall protection slurry outlets are provided on the wall protection slurry conduits 107 102, the wall protection slurry outlet 102 is on either side of each lateral soil cutting knife 103 on the outer surface of the jacking body 104, each row of the wall protection slurry outlet 102 is four holes, and two holes are longitudinally arranged at the front end and the rear end of the jacking body respectively; a comprehensive vibrator 108 is arranged inside the front end of the jacking body 104, one end of the forward vibration hammer 106 is fixedly connected to the soil squeezing cone top 105, and the other end is connected to the comprehensive vibrator 108; the comprehensive vibrator 108 is connected to the jacking body 104 through a lateral vibration arm 109, and the jacking vibration correction row rod can be extended and retracted under the action of hydraulic pressure, connecting the front end of the jacking body 104 and the rear end of the jacking body 104; the positioning device is fixed at the tail of the jacking body 104.

[0028] like Figure 1-5 As described above, the embedded propulsion system 2 includes a threaded structure gasket 201, an embedded support arm tube 202, a jacking support arm tube 203, a traction support arm tube 204, an embedded hydraulic rod 205, a jacking hydraulic rod 206, a traction hydraulic rod 207, and a hanging gasket 208; the threaded structure gasket 201 fixes the embedded support arm tube 202, the jacking support arm tube 203, and the traction support arm tube 204 in sequence at the rear end of the jacking body 104; and the hanging gasket 208 fixes the pipeline system 4 at the rear end of the embedded propulsion system 2.

[0029] like Figure 1-2As described above, the base reaction force system 3 includes a base back plate 301, a hydraulic correction push rod 302, an embedded soil grid plate 303, a fixed frame 304, a circular door opening 305, a bottoming bottom plate 306, and a link tightening ring 307; the link tightening ring 306 is located at the head end of the base reaction force system 3, and can embed the torsion and telescopic link 405 to prevent it from continuing to twist; the circular door opening 305 is sleeved on the rear part of the link tightening ring 307, and the fixed frame 304 connects the circular door opening 305 with the bottoming bottom plate 306; the head end of the hydraulic correction push rod 302 is fixed on the link tightening ring 307, and the end is fixed on the base back plate 301, and the angle between the link tightening ring 307 and the base back plate 301 can be controlled by a hydraulic device, so as to realize the control of the propulsion direction of the torsion and telescopic link 405.

[0030] like Figure 1-3 The pipeline system 4 includes a laying pipeline 401, a slurry-electricity supply composite line 403, a control steel cable 402, a flexible pipeline sleeve 404, and a torsion expansion link 405; the torsion expansion link 405 is wrapped inside the flexible pipeline sleeve 404, and the flexible pipeline sleeve 404 and a plurality of torsion expansion links 405 are connected front and back to form the core outer wall of the pipeline, which extends through the circular doorway 305 and extends above the sea surface. The laying pipeline 401 is a deep-sea and shallow coastal wind power cable, a micro-pipeline for offshore oil and gas transportation, a submarine optical cable, and a power supply line for facilities and equipment; the control steel cable 402 is fixed at its head end on the suspension gasket 208, and the other end extends above the sea surface through the circular doorway 305; the slurry-electricity supply composite line 403 supplies slurry and electric energy to the front top vibration drill bit system 1 and the embedded propulsion system 2, and its head end eventually forms a branch connection wall protection slurry conduit 107 and a comprehensive vibrator 108.

[0031] The torsion and telescopic links 405 can be connected in series through the control steel cable 402 at the central position to wrap the pipeline system 4, and the pipeline system 4 is connected to the suspension gasket 208 at the tail of the embedded propulsion system 2 through the reserved channel of the torsion link; the torsion and telescopic links 405 are longitudinally provided with telescopic landslide ring feet 4053, retention steps 4054, limiting channels 4051, and inner concave platforms 4052; the telescopic landslide ring feet 4053 are wedge-shaped semicircular rings with two right-angled sides facing each other, and a pair of telescopic landslide ring feet 4053 are longitudinally arranged in opposite diameters on a torsion and telescopic link 405; preferably, a limiting device is provided at the tip of the telescopic landslide ring foot 4053 and the top of the inner concave platform 4052 to prevent the link from being misaligned; the limiting channel 4051 is provided on the side of the tail of the telescopic landslide ring foot 4053, and the torsion and telescopic link 405 can be fixed under the embedding of the hydraulic ejector of the link clamp ring 307.

[0032] As described above, the embedded support arm tube 202, the jacking support arm tube 203, and the traction support arm tube 204 have a slight external arch. Under the action of external force, the arch height of the embedded support arm tube 202, the jacking support arm tube 203, and the traction support arm tube 204 will increase, so that they are embedded in the sediment soil, thereby achieving the effect of self-anchoring the embedded propulsion system 2. The adhesion force between the sediment prevents the top vibration drill bit system 1 from twisting and slipping during the process of laying the pipeline. In addition, the embedded support arm tube 202, the jacking support arm tube 203, and the traction support arm tube 204 provide reaction force for the jacking work of the jacking drill bit system.

[0033] The integrated vibrator 108 has a maximum vibration power of ≥100 kilowatts, a vibration frequency of 30-50 Hz, and an amplitude of 10-15 mm; the vibration generated by the integrated vibrator 108 is transmitted to the side wall of the jacking body 104 through the lateral vibration arm 109, and the soil extrusion cone top 105 is driven to vibrate through the forward vibration hammer 106 to complete the vibration advancement. The wall slurry conduit 107 stores the wall slurry, which is ejected from the wall slurry outlet 102; the working pressure of the wall slurry is 200-600 kPa, and the wall slurry uses seawater: bentonite = 7-9:1.

[0034] The laying pipeline 401 includes a cable with a diameter of 20-100mm and a pipe with a diameter of 80-250mm; the maximum number of buried pipelines is 6 strands, and the pipeline D value (ratio of bending radius to pipeline diameter) of the laying pipeline 401 is 1.0-2.0. The buried pipeline 401 and the torsion and telescopic link 405 are nested inside the flexible pipeline sleeve 404, the head end is located above the sea level, and after extending to the suspension gasket 208 with the buried pipeline 401, it is folded outward after non-fixed suspension, and the end is fixedly connected to the circular door opening 305, forming a double-layer casing structure under the seabed.

[0035] The outer surfaces of the forward soil cutting knife 101, the lateral soil cutting knife 103, the soil squeezing cone top 105, and the jacking body 104 in the top vibration drill bit system 1 are all designed with smooth surfaces. At the same time, a nickel-tungsten alloy coating is deposited on the metal surface by an electrochemical method, and its hardness is greater than 550HV and the wear rate is ≤1.25*10 -5 mm 3 / N·m; a layer of wear-resistant self-lubricating modified coating is formed by controlling the penetration of 20-50 µm thick submicron-level fluorine-containing polymer particles; the embedded support arm tube 202, the jacking support arm tube 203, the traction support arm tube 204, and the torsion and telescopic link 405 are made of one or more of ABS plastic, polyester elastomer (TPE), and nylon; the embedded support arm tube 202, the jacking support arm tube 203, the traction support arm tube 204, and the base reaction force system 3 are designed with rough surfaces, holes, or raised surfaces on the contact surface with the sediment to increase the contact area with the sediment.

[0036] As described above, the clamping ring 307 is provided with a clamping attachment head 3072, a hydraulic rod 3073, and a pressure rod steering shaft 3074. The clamping attachment head 3072 can be extended or retracted under the action of hydraulic pressure; when the clamping attachment head 3072 is extended into the limiting channel 4051 of the torsion and telescopic link 405, the link is locked and cannot rotate freely; under the reverse pulling force of the control cable 402 and the positive pulling force of the top vibration drill bit system 1, the control pipeline system 4 is spirally extended or retracted.

[0037] As described above, the base reaction system 3, the pipeline system 4, the embedded propulsion system 2, and the top vibration drill bit system 1 form a closed working chamber below the seabed; the bottom contact base plate 306 is a cantilever structure, which can be embedded in the soil at the bottom to ensure that the base reaction system 3 has sufficient anti-torsion force; the soil embedded grid plate 303 is fixedly connected to the back of the base back plate 301, and a grid-like sediment channel is left in the middle, which can enhance the embedding force after the base reaction system 3 sinks into the soil.

[0038] The method for carrying out submarine cable burying activities using the integrated equipment for high-efficiency and low-disturbance drilling and burying of submarine cables comprises the following steps: Step 1: An integrated submarine cable and high-efficiency low-disturbance drilling and burying equipment is transported to a designated area by an offshore mother ship. A pit is dug on the seabed using the mother ship's grab. The operator lowers the device into the predetermined pit using a crane on the offshore mother ship. The positioning device 1011 starts working to achieve real-time position tracking of lowering, working, and recovery.

[0039] Step 2: The operator controls the steel cable 402 through mechanical pre-tensioning, and at the same time controls the link tightening ring 307 to fix the tail link, so that the relative rotation angle of the front torsion and telescopic link 405 returns to zero. At this time, the inner wall of the pipeline core formed by the torsion and telescopic link 405 is in the shortest state, and the reaction force generated by the thrust will be transmitted along the torsion and telescopic link 405, the link tightening ring 307, the circular door opening 305, the hydraulic correction push rod 302 and the fixed frame 304 to the base back plate 301.

[0040] Step three: the integrated vibrator 108 of the top vibration drill bit system 1 starts to work, applying vibration to the jacking body 104 and the soil squeezing cone top 105; the soil structure is reconstructed with the sediments around the top vibration drill bit system 1 under the action of vibration; at this time, the wall protection slurry is continuously pumped from the wall protection slurry conduit 107 to the wall protection slurry outlet 102; the slurry splashes out from the wall protection slurry outlet 102, and after mixing with the sediment, a layer of lubricating mud layer is formed on the surface of the top vibration drill bit system 1; at this time, the embedded hydraulic rod 205, the jacking hydraulic rod 206, and the traction hydraulic rod 207 are in a retracted state and retracted, so that the embedded support arm tube 202, the jacking support arm tube 203, and the traction support arm tube 204 are shortened longitudinally in sequence, and expand and squeeze the soil laterally; the forward soil cutting knife 101 and the lateral soil cutting knife 103 cut the lubricating mud layer and prepare to move forward.

[0041] Step 4: The top vibration correction rod 1010 of the top vibration drill bit system 1 adjusts the head propulsion direction of the top vibration drill bit system 1 according to the horizontal inclination angle of the annular rod band formed by it, so as to keep it horizontal or set the pitch angle propulsion as needed; the hydraulic correction push rod 302 of the base reaction force system 3 adjusts the horizontal and vertical pitch angles of the clamping ring 307 according to the size of the hydraulic pressure to ensure that the reaction force is uniform and effective.

[0042] Step 5: The embedded hydraulic rod 205, the jacking hydraulic rod 206, and the traction hydraulic rod 207 are extended in sequence under hydraulic control, so that the embedded support arm tube 202, the jacking support arm tube 203, and the traction support arm tube 204 are extended longitudinally in sequence; the link tightening ring 307 rotates in the opposite direction; the top vibration drill bit system 1 is pushed forward, the link spacing is extended, and the flexible pipeline sleeve 404 is subjected to tension and continues to be laid forward.

[0043] Step six: the embedded hydraulic rod 205, the jacking hydraulic rod 206 and the traction hydraulic rod 207 are retracted in sequence under hydraulic control, so that the embedded support arm tube 202, the jacking support arm tube 203 and the traction support arm tube 204 are shortened longitudinally in sequence and expanded transversely to squeeze the soil; the link tightening ring 307 is released, and the operator uses the pipeline arranging device to twist the pipeline around the control steel cable 402, and at the same time drives the torsional telescopic link 405 to advance spirally forward, and the link spacing is retracted to cause the torsional telescopic link 405 behind the link tightening ring 307 to twist and advance to the front of the link tightening ring 307, and the circular door opening 305 fixes the tail end of the flexible pipeline sleeve 404, and the retreat reaction force causes the flexible pipeline sleeve to deform and squeeze the surrounding soil to form a sliding cavity channel.

[0044] Step 7: Tighten the link tightening ring 307 again, and repeat steps 5 and 6 to continue moving forward, and finally complete the pipeline laying.

[0045] Step eight: the top vibration correction rod 1010 of the top vibration drill bit system 1 adjusts the telescopic degree of the hydraulic rod so that the head of the top vibration drill bit system 1 is lifted out of the seabed surface, and the top vibration drill bit system 1 releases the connection with the flexible pipeline sleeve 404; the operator uses the seabed recovery fixture to complete the recovery task of the top vibration drill bit system 1 and the head of the pipeline system 4.

Claims

1. An integrated equipment for high-efficiency and low-disturbance drilling and burying of submarine cables, characterized by: Including top vibration drill bit system, embedded propulsion system, base reaction system, pipeline system; The top vibration drill head system is located at the front of the entire device, and its rear is connected to the embedded propulsion system through a threaded structure gasket; the embedded propulsion system is connected to the pipeline system through a hanging gasket; the pipeline system extends out of the sea surface through the circular door opening at the front end of the base reaction force system or is directly connected to the electrical equipment pipeline outlet; the base reaction force system is located at the rear of the device; The top vibration drill bit system comprises a forward soil cutting knife, a lateral soil cutting knife, a soil squeezing cone top, a wall protection slurry outlet, a wall protection slurry conduit, a jacking body, a forward vibration hammer, a lateral vibration arm, a comprehensive vibration machine, a top vibration correction row of rods, and a positioning device; the forward soil cutting knife is in a "cross" shape, fixed on the soil squeezing cone top and the tail is connected to the lateral soil cutting knife; a total of four lateral soil cutting knives are fixed on the front end of the jacking body; four wall protection slurry conduits are arranged inside the jacking body, and three rows of wall protection slurry outlets are arranged on the wall protection slurry conduits, and the wall protection slurry outlets are on either side of each lateral soil cutting knife on the outer surface of the jacking body; a comprehensive vibration machine is arranged inside the front end of the jacking body, one end of the forward vibration hammer is fixedly connected to the soil squeezing cone top, and the other end is connected to the comprehensive vibration machine; the comprehensive vibration machine is connected to the jacking body through the lateral vibration arm, and the top vibration correction row of rods can be extended and retracted under the action of hydraulic pressure, connecting the front end of the jacking body with the rear end of the jacking body; the positioning device is fixed at the rear end of the jacking body; The embedded propulsion system comprises a threaded structure gasket, an embedded support arm tube, a jacking support arm tube, a traction support arm tube, an embedded hydraulic rod, a jacking hydraulic rod, a traction hydraulic rod, and a hanging gasket; the threaded structure gasket fixes the embedded support arm tube, the jacking support arm tube, and the traction support arm tube to the rear end of the jacking body in sequence; the hanging gasket fixes the pipeline system to the rear end of the embedded propulsion system; The base reaction force system includes a base back plate, a hydraulic correction push rod, a soil embedded grid plate, a fixed frame, a circular door opening, a bottom contact bottom plate, and a link tightening ring; the link tightening ring is located at the head end of the base reaction force system, and can be used to embed the torsion and telescopic link to prevent it from continuing to twist; the circular door opening is sleeved on the rear part of the link tightening ring, and the fixed frame connects the circular door opening with the bottom contact bottom plate; the head end of the hydraulic correction push rod is fixed on the link tightening ring, and the tail end is fixed on the base back plate, and the angle between the link tightening ring and the base back plate can be controlled by hydraulic pressure, so as to realize the control of the propulsion direction of the torsion and telescopic link; The pipeline system includes a laying pipeline, a slurry-electricity supply composite line, a control steel cable, a flexible pipeline sleeve, and a torsional expansion and contraction link; the torsional expansion and contraction link is wrapped in the flexible pipeline sleeve, and the flexible pipeline sleeve and the core outer wall of the pipeline composed of multiple torsional expansion and contraction links connected front and back extend through a circular doorway and extend above the sea surface; the laying pipelines are deep-sea and shallow coastal wind power cables, offshore oil and gas transportation micro-pipelines, submarine optical cables and power supply lines for facilities and equipment; the control steel cable passes through the center of the cross-section of the torsional expansion and contraction pipe wall system, with its head end fixed on a threaded structure gasket and the other end extending above the sea surface through a circular doorway; the slurry-electricity supply composite line supplies slurry and electric energy to the front top vibration drill bit system 1 and the embedded propulsion system, and its head end eventually forms a branch connection wall protection slurry conduit and a comprehensive vibrator.

2. According to claim 1, a submarine cable high-efficiency and low-disturbance drilling-burying integrated equipment is characterized in that: The torsion and telescopic links can be connected in series through a control steel cable at a central position to wrap the pipeline system, and the pipeline system is connected to the suspension gasket at the tail of the embedded propulsion system through a reserved channel in the torsion and telescopic link; the torsion and telescopic link is longitudinally provided with a telescopic slide ring foot, a retention step, a limiting channel, and a concave platform in the ring; the telescopic slide ring foot is a wedge-shaped semicircular ring with two right-angled sides facing each other, and a pair of telescopic slide ring feet are longitudinally arranged in opposite diameters on a torsion and telescopic link; preferably, a limiting device is provided at the tip of the telescopic slide ring foot and the top of the concave platform in the ring to prevent the link from being misaligned; the limiting channel is provided on the side of the tail of the telescopic slide ring foot, and the torsion and telescopic link can be fixed under the embedding of the hydraulic ejector of the link tightening ring.

3. According to claim 1, a submarine cable high-efficiency and low-disturbance drilling-burying integrated equipment is characterized in that: The embedded support arm tube, jacking support arm tube and traction support arm tube have a slight external arch. Under the action of external force, the arch height will increase, so that it is embedded in the sediment soil, thereby achieving the effect of self-anchoring the embedded propulsion system. The adhesion force between the sediment prevents the top vibration drill bit system from twisting and slipping during the process of laying the pipeline. In addition, the embedded support arm tube, jacking support arm tube and traction support arm tube provide reaction force for the jacking work of the top vibration drill bit system.

4. According to claim 1, a submarine cable high-efficiency and low-disturbance drilling and burying integrated equipment is characterized in that: The integrated vibrator has a maximum vibration power of ≥100 kilowatts, a vibration frequency of 30-50 Hz, and an amplitude of 10-15 mm; the integrated vibrator transmits the vibration to the side wall of the jacking body through the lateral vibration arm, and drives the top of the soil-extruding cone to vibrate through the forward vibration hammer to complete the vibration advancement.

5. According to claim 1, the high-efficiency and low-disturbance integrated drilling and burying equipment for submarine cables is characterized in that: The wall protection slurry is stored in the wall protection slurry conduit and ejected from the wall protection slurry outlet; the working pressure of the wall protection slurry is 200-600 kPa, and the wall protection slurry adopts seawater: bentonite = 7-9:

1.

6. According to claim 1, the high-efficiency and low-disturbance integrated drilling and burying equipment for submarine cables is characterized in that: The laid pipelines include cables with a diameter of 20-100 mm and pipes with a diameter of 80-250 mm; the maximum number of buried pipelines is 6, and the pipeline D value (ratio of bending radius to pipeline diameter) of the laid pipelines is 1.0-2.0; the buried pipelines and torsion and expansion links are nested inside the flexible pipeline sleeve, the head end of which is located above sea level and extends to the hanging gasket with the buried pipeline, folds outward after non-fixed suspension, and the end is fixedly connected to the circular doorway, forming a double-layer casing structure under the seabed.

7. The high-efficiency and low-disturbance integrated drilling and burying equipment for submarine cables according to claim 1, characterized in that: The outer surfaces of the forward soil cutting knife, lateral soil cutting knife, soil squeezing cone top and jacking body in the top vibration drill bit system are all designed with smooth surfaces. At the same time, a nickel-tungsten alloy coating is deposited on the metal surface by an electrochemical method, and its hardness is greater than 550HV and the wear rate is less than 1.25*10 -5 mm 3 / N·m; a wear-resistant self-lubricating modified coating is formed by controlling the penetration of 20~50 µm thick submicron-sized fluorine-containing polymer particles; The embedded support arm tube, the jacking support arm tube, the traction support arm tube, and the torsion and telescopic links are made of one or more of ABS plastic, polyester elastomer (TPE), and nylon; the contact surfaces of the embedded support arm tube, the jacking support arm tube, the traction support arm tube, and the base reaction system with the sediment are designed with rough surfaces, holes, or raised surfaces to increase the contact area with the sediment.

8. According to claim 1, the high-efficiency and low-disturbance integrated drilling and burying equipment for submarine cables is characterized in that: The link tightening ring is provided with a tightening attachment head, a hydraulic rod, and a pressure rod steering shaft. The tightening attachment head can be extended or retracted under the action of hydraulic pressure; when the tightening attachment head is extended into the limiting hole of the torsion and telescopic link, the link is locked and cannot rotate freely; under the reverse pulling force of the control steel cable and the forward pulling force of the top vibration drill bit system, the control pipeline system is spirally extended or retracted.

9. The high-efficiency and low-disturbance integrated drilling and burying equipment for submarine cables according to claim 1, characterized in that: The base reaction system, pipeline system, embedded propulsion system and top vibration drill bit system form a closed working chamber below the seabed; the bottom-touching base plate is a cantilever structure that can be embedded in the soil at the bottom to ensure that the base reaction system has sufficient anti-torsion force; the embedded soil grid plate is fixedly connected to the back of the base back plate, with a grid-like sediment channel in the middle, which can enhance the embedding force after the base reaction system sinks into the soil.

10. A method for carrying out submarine cable burying construction using the submarine cable high-efficiency and low-disturbance drilling-burying integrated equipment as claimed in any one of claims 1 to 9, the construction method comprising the following steps: Step 1: An integrated submarine cable drilling and burying equipment with high efficiency and low disturbance is transported to a designated area by an offshore mother ship. A pit is dug on the seabed by the mother ship grab. The operator lowers the device into the predetermined pit by the crane of the offshore mother ship. The positioning device starts working to realize real-time position tracking of lowering, working and recovery. Step 2: The operator controls the steel cable through mechanical pre-tensioning, and at the same time controls the link tightening ring to fix the tail link, so that the relative rotation angle of the front torsion and telescopic link returns to zero. At this time, the outer wall of the pipeline core formed by the torsion and telescopic link is in the shortest state, and the reaction force generated by the propulsion will be finally transmitted to the base back plate along the torsion and telescopic link, link tightening ring, circular door opening, hydraulic correction push rod and fixed frame; Step 3: The integrated vibrator of the top vibration drill system starts to work, exerting vibration on the jacking body and the top of the soil extrusion cone; the sediments around the top vibration drill system undergo soil structure reconstruction under the action of vibration; at this time, the wall slurry is continuously pumped from the wall slurry conduit to the wall slurry outlet; the slurry splashes out from the wall slurry outlet, and after mixing with the sediment, a lubricating mud layer is formed on the surface of the top vibration drill system; at this time, the embedded hydraulic rod, the jacking hydraulic rod, and the traction hydraulic rod are in a retracted state and retracted, so that the embedded support arm tube, the jacking support arm tube, and the traction support arm tube are shortened longitudinally in turn, and expand and squeeze the soil laterally; then, under the action of thrust, the forward soil cutter and the lateral soil cutter cut the lubricating mud layer and start to move forward; Step 4: The top vibration correction rod of the top vibration drill bit system adjusts the head propulsion direction of the top vibration drill bit system according to the horizontal inclination angle of the annular rod belt formed by it, so that it remains horizontal or sets the pitch angle as required; the hydraulic correction rod of the base reaction force system adjusts the horizontal and vertical pitch angles of the tweezer ring according to the size of the hydraulic pressure to ensure that the reaction force is uniform and effective; Step 5: The embedded hydraulic rod, the jacking hydraulic rod, and the traction hydraulic rod are extended in sequence under hydraulic control, so that the embedded support arm tube, the jacking support arm tube, and the traction support arm tube are extended longitudinally in sequence; the link tightening ring rotates in the reverse direction to push the top vibration drill bit system forward, the link spacing is extended, and the elastic-plastic pressure wave outer casing is subjected to tension and continues to be laid forward; Step 6: The embedded hydraulic rod, the jacking hydraulic rod, and the traction hydraulic rod are retracted in sequence under hydraulic control, so that the embedded support arm tube, the jacking support arm tube, and the traction support arm tube are shortened longitudinally in sequence, and expand and squeeze the soil laterally; the link tightening ring is released, and the pipeline is controlled to twist around the steel cable through the pipeline arrangement device, and at the same time, the twisting and telescopic link is driven to advance spirally forward, and the link spacing is retracted so that the twisting and telescopic link behind the link tightening ring is twisted and pushed to the front of the link tightening ring, and the circular door hole tightens the elastic-plastic pressure wave outer casing, and the retreat reaction force causes the elastic-plastic pressure wave outer casing to deform and squeeze the surrounding soil to form a sliding channel; Step 7: Tighten the link tweezers ring again, and repeat steps 5 and 6 to continue moving forward, and finally complete the pipeline laying; Step 8: The top vibration correction rod of the top vibration drill bit system adjusts the extension and retraction of the hydraulic rod so that the head of the top vibration drill bit system is lifted out of the seabed surface, and the top vibration drill bit system releases the connection with the elastic-plastic pressure wave outer casing and the torsional extension link; the recovery task of the top vibration drill bit system and the pipeline head is completed through the seabed recovery fixture.

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