An ultra-high pressure fracturing manifold with high sealing installation structure

Abstract

The application provides an ultra-high pressure fracturing manifold with a high sealing installation structure, which comprises a main manifold body, a top layer pipeline fixedly connected to the top of the main manifold body, and a valve arranged on the top layer pipeline, a first bottom plate fixedly connected to the bottom of the main manifold body, a branch connecting assembly arranged on the outer surface of the main manifold body, a branch pipeline, a sealing module for sealing the branch connecting assembly and the branch pipeline, and a three-stage protection module for protecting the sealing module; the sealing module is arranged between the branch connecting assembly and the branch pipeline, fracturing fluid enters the main manifold body from the branch pipeline at one end, the main manifold body then distributes and circulates the fracturing fluid, the three-stage protection module is first passed through by the fracturing fluid, impurities in the fracturing fluid are guided to the center of the pipeline, and the sealing module also seals the gap between the branch connecting assembly and the branch pipeline after contacting the fracturing fluid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultra-high pressure fracturing manifold sealing, in particular to an ultra-high pressure fracturing manifold with high sealing installation structure. BACKGROUND

[0002] With the global oil and gas resources exploration and development gradually extending to deep layer, ultra-deep layer (well depth > 4000m) and unconventional oil and gas reservoirs (shale gas, tight sandstone gas, etc.), the reservoir geological conditions are more and more complex, and the problems of low porosity and poor permeability are significant. In order to effectively improve the oil and gas recovery, the ultra-high pressure fracturing technology becomes the core development means - by injecting high pressure fracturing fluid (containing proppant) into the reservoir, forming an artificial fracture network, and realizing efficient oil and gas flow.

[0003] The existing sealing material is insufficient in resistance to erosion, and the fluororubber sealing gasket is easily scratched by particles, cracks and damaged, which needs to be frequently replaced, affecting the continuity of operation.

[0004] In the ultra-high pressure fracturing operation, the pressure inside the manifold can reach tens or even hundreds of megapascals, and the pressure fluctuates frequently. At the same time, the fracturing fluid often contains solid particles, which has a scouring effect on the sealing element. Under the dual action of pressure and particle scouring, the sealing element is easily aged and worn, resulting in a decrease in sealing performance. SUMMARY

[0005] The purpose of the present application is to solve the problem that the sealing element is easily aged and worn under the dual action of pressure and particle scouring during long-time fracturing, and to provide an ultra-high pressure fracturing manifold with high sealing installation structure.

[0006] The technical solution adopted by the present application to solve its technical problems is: an ultra-high pressure fracturing manifold with high sealing installation structure, comprising: a main manifold body, a top layer pipeline fixedly connected to the top of the main manifold body, a valve provided on the top layer pipeline, and a first bottom plate fixedly connected to the bottom of the main manifold body, further comprising:

[0007] a branch connection assembly provided on the outer surface of the main manifold body, a branch pipeline, a sealing module for sealing the branch connection assembly and the branch pipeline, and a three-stage protection module for protecting the sealing module;

[0008] The sealing module is arranged between the branch connection assembly and the branch pipeline, and the three-stage protection module is arranged on the branch pipeline;

[0009] The end of the branch pipeline away from the main manifold body is fixedly connected with a reducing joint, and the outer surface of the reducing joint is fixedly connected with a second bottom plate;

[0010] The branch connection assembly comprises a short section pipe, a ring groove is arranged at the minimum radius of the short section pipe, a first sealing groove is further arranged on the inner wall of the short section pipe, the first sealing groove is communicated with the ring groove, a gap groove is formed between the branch pipe and the short section pipe, a hydraulic resin-based composite material is placed in the gap groove during installation, and a second gap groove is arranged on the branch pipe close to the first sealing groove;

[0011] The fracturing fluid impacts the sealing assembly, so that the sealing assembly seals the gap between the branch connection assembly and the branch pipe

[0012] Further, the sealing module comprises a guide rod, a pressing plate is slidably connected to the outer surface of the guide rod, and a water-facing surface is arranged on the side of the pressing plate facing the fracturing fluid, and a pressing surface is further arranged on the outer surface of the pressing plate.

[0013] The sealing module further comprises an elastic sealing gasket arranged in the ring groove, and a first protrusion and a second protrusion are arranged at the two ends of the elastic sealing gasket, respectively.

[0014] Further, the short section pipe is integrally connected with the main pipe body, and the short section pipe and the branch pipe are fixed by bolts.

[0015] Further, one end of the guide rod is fixedly connected with the outer surface of the ring groove, the small radius surface of the elastic sealing gasket is in contact with the large radius surface of the pressing plate, the first protrusion is matched with the position of the first sealing groove, and the second protrusion is matched with the position of the second sealing groove.

[0016] Further, the three-level protection module comprises a rubidium magnetic ring, a coil is wound around the outer surface of the rubidium magnetic ring, and a power supply device is connected to the port of the coil, so that the magnetism of the rubidium magnetic ring is amplified after the power supply device passes through the coil.

[0017] Further, the three-level protection module further comprises an isolation plate, a liquid passage is arranged on the isolation plate, no liquid passage is arranged at the center of the isolation plate, the mesh diameter of the liquid passage is 0.3 mm, a flow guide mechanism is arranged on the side of the isolation plate facing the fracturing fluid, and a spiral mechanism is arranged on the side of the isolation plate away from the fracturing fluid.

[0018] Further, the isolation plate is arranged on the inner wall of the branch pipe, and the isolation plate is integrally formed with the branch pipe.

[0019] Further, the flow guide mechanism comprises an end plate, a rotating shaft is uniformly arranged on the inner wall of the end plate, the two ends of the rotating shaft are rotatably connected with the inner wall of the end plate, a flow guide plate is fixedly connected to the outer surface of the rotating shaft, a rubidium magnetic block is fixedly connected to the inner wall of the flow guide plate, the magnetism of the rubidium magnetic block is the same as that of the rubidium magnetic ring, and an extension rod is fixedly connected to the inner wall of the end plate.

[0020] Further, the end plate is integrally formed with the isolation plate, and the output end of the telescopic rod is fixedly connected with the outer surface of the rubidium magnetic block.

[0021] Further, the screw mechanism comprises a center line flow pipe, one end of the center line flow pipe is fixedly connected with an outer ring pipe, the outer surface of the outer ring pipe is uniformly provided with a channel, the inner wall of the channel is provided with a spiral groove, the channel is provided with a residue discharge groove towards the circular part of the outer ring pipe, and the channel is fixedly connected with an isolation strip close to the residue discharge groove.

[0022] Further, the center line flow pipe is fixedly connected with the outer surface of the isolation plate, and the center line flow pipe is located at the axis center line of the branch pipeline and communicates with the center liquid non-through hole of the isolation plate.

[0023] The ultra-high pressure fracturing manifold with the high sealing installation structure has the following advantages:

[0024] (1) The branch connecting assembly and the branch pipeline are bolted, and there is still a gap between the branch connecting assembly and the branch pipeline, so the first sealing groove is arranged on the short pipe, and the second sealing groove is arranged on the branch pipeline, after the medium flows, the sealing module extrudes the first sealing groove and the second sealing groove, so as to prevent the medium from entering the gap;

[0025] (2) The sealing module, the flow rate of the fracturing fluid is fast, the impact force is large, and the long-time scouring effect on the elastic sealing pad will cause damage to the elastic sealing pad, so the extrusion plate is arranged between the elastic sealing pad and the fracturing fluid impact, the fracturing fluid only impacts the water-facing surface of the extrusion plate, not only increases the sealing property of the first convex block and the second convex block to the first sealing groove and the second sealing groove, but also makes the extrusion surface and the outside of the second sealing groove precisely fit, further hindering the fracturing fluid from entering the gap between the branch connecting assembly and the branch pipeline;

[0026] (3) The three-level protection module, the fracturing fluid often contains solid particles, which has a scouring effect on the sealing element, even if the extrusion plate is arranged to block the direct contact of the medium and the elastic sealing pad, with the long-time impact, the sealing element is also easy to age and wear, resulting in a decrease in sealing property, so the three-level protection module is arranged to protect the sealing module in terms of source interception, path guidance and particle and medium separation.

[0027] (4) Spiral mechanism, although the isolation plate will block the direct impact of large particles on the sealing module, but there are still small particles in the fracturing fluid, and these particles will cause damage to the extrusion plate after a long time of impact. In the process of passing through the channel, the liquid and particles will rotate and move along the spiral groove, and under the action of centrifugal force, the particles are thrown to the deslagging groove on the spiral groove and continue to move along the deslagging groove. Control of particulate matter after leaving the channel is relatively close to the center of the branch pipe. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a three-dimensional structural schematic diagram of an ultra-high pressure fracturing manifold with a high sealing installation structure provided by the present application;

[0029] Figure 2 is a structural cross-sectional view of an ultra-high pressure fracturing manifold with a high sealing installation structure provided by the present application;

[0030] Figure 3 is a structural schematic diagram of a branch connection assembly of an ultra-high pressure fracturing manifold with a high sealing installation structure provided by the present application;

[0031] Figure 4 is a sealing module structural schematic diagram of an ultra-high pressure fracturing manifold with a high sealing installation structure provided by the present application;

[0032] Figure 5 is a structural schematic diagram of an elastic sealing gasket of an ultra-high pressure fracturing manifold with a high sealing installation structure provided by the present application;

[0033] Figure 6 is a structural schematic diagram of a three-stage protection module of an ultra-high pressure fracturing manifold with a high sealing installation structure provided by the present application;

[0034] Figure 7 is a structural cross-sectional view of a three-stage protection module of an ultra-high pressure fracturing manifold with a high sealing installation structure provided by the present application;

[0035] Figure 8 is a structural schematic diagram of a flow guide mechanism of an ultra-high pressure fracturing manifold with a high sealing installation structure provided by the present application;

[0036] Figure 9 is a structural schematic diagram of a spiral mechanism of an ultra-high pressure fracturing manifold with a high sealing installation structure provided by the present application;

[0037] Figure 10 is a structural schematic diagram of a channel in an ultra-high pressure fracturing manifold with a high sealing installation structure provided by the present application.

[0038] In the diagram: 1. Main pipe assembly; 2. Top layer pipe; 3. Valve; 4. First base plate; 5. Branch connection assembly; 6. Branch pipe; 7. Sealing module; 8. Three-stage protection module; 9. Reducing joint; 10. Second base plate; 51. Short section pipe; 52. Annular groove; 53. First sealing groove; 54. Gap groove; 61. Second gap groove; 71. Guide rod; 72. Extrusion plate; 73. Water-facing surface; 74. Extrusion surface; 75. Elastic sealing gasket; 7 6. First protrusion; 77. Second protrusion; 81. Rubidium magnetic ring; 82. Coil; 83. Power supply device; 84. Isolation plate; 85. Flow guiding mechanism; 86. Spiral mechanism; 87. Liquid passage hole; 851. End plate; 852. Rotating shaft; 853. Flow guiding plate; 854. Telescopic rod; 855. Rubidium magnetic block; 861. Centerline flow pipe; 862. Outer ring pipe; 863. Channel; 864. Spiral groove; 865. Slag discharge trough; 866. Isolation strip. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the further embodiments described herein are merely illustrative and not intended to limit the invention.

[0040] like Figures 1-2 As shown, an ultra-high pressure fracturing manifold with a high-sealing installation structure includes: a main manifold body 1, a top pipe 2 fixedly connected to the top of the main manifold body 1, a valve 3 installed on the top pipe 2, and a first base plate 4 fixedly connected to the bottom of the main manifold body 1; and further includes:

[0041] The branch connection assembly 5, the branch pipe 6, the sealing module 7 for sealing the branch connection assembly 5 and the branch pipe 6, and the three-level protection module 8 for protecting the sealing module 7 are provided on the outer surface of the main body 1.

[0042] The sealing module 7 is disposed between the branch connection assembly 5 and the branch pipe 6, and the three-level protection module 8 is disposed on the branch pipe 6;

[0043] A reducing joint 9 is fixedly connected to the end of the branch pipe 6 away from the main pipe 1, and a second base plate 10 is fixedly connected to the outer surface of the reducing joint 9.

[0044] When the present invention is in operation, the fracturing fluid first enters the main manifold 1 from the branch pipe 6 at one end. Then the main manifold 1 distributes and circulates the fracturing fluid. The fracturing fluid first passes through the three-stage protection module 8, which guides the impurities in the fracturing fluid to the center of the pipe, avoiding direct impact on the sealing module 7. At the same time, after the sealing module 7 comes into contact with the fracturing fluid, it also seals the gap between the branch connection component 5 and the branch pipe 6.

[0045] As shown in Figures 6-7 The third protection module 8 includes a rubidium magnetic ring 81, the outer surface of the rubidium magnetic ring 81 is wound with a coil 82, the port of the coil 82 is connected with an energizing device 83, the magnetic property of the rubidium magnetic ring 81 is amplified after the energizing device 83 energizes the coil 82. The rubidium magnetic ring 81 is made of N52 type neodymium iron boron material, the diameter is adapted to the inner diameter of the branch pipeline 6, the coil 82 is copper enameled wire, the number of turns is 300 turns, and the magnetic field strength can reach 1200Gs after energization, effectively driving the flow guide mechanism to act.

[0046] The third protection module 8 further includes an isolation plate 84, the isolation plate 84 is provided with a liquid passage hole 87, the center of the isolation plate 84 is not provided with a liquid passage hole 87, the mesh diameter of the liquid passage hole 87 is 0.3mm, the side of the isolation plate 84 facing the fracturing fluid is provided with a flow guide mechanism 85, and the side of the isolation plate 84 facing away from the fracturing fluid is provided with a spiral mechanism 86. The isolation plate 84 is made of 316L stainless steel laser punching, the thickness is 8mm, the liquid passage holes 87 are arranged in a ring array, the opening rate is 40%, and the filtering effect and flow capacity are considered.

[0047] After the fracturing fluid enters the branch pipeline 6, the fracturing fluid will first pass through the isolation plate 84, the liquid and particles smaller than 0.3mm will directly pass through the liquid passage hole 87 on the isolation plate 84, and particles larger than 0.3mm will be blocked by the isolation plate 84.

[0048] The isolation plate is arranged on the inner wall of the branch pipeline 6, and the isolation plate 84 is integrally formed with the branch pipeline 6.

[0049] As shown in Figure 8 The flow guide mechanism 85 includes an end plate 851, the inner wall of the end plate 851 is uniformly provided with a rotating shaft 852, the two ends of the rotating shaft 852 are rotatably connected with the inner wall of the end plate 851, the outer surface of the rotating shaft 852 is fixedly connected with a flow guide plate 853, the inner wall of the flow guide plate 853 is fixedly connected with a rubidium magnetic block 855, and the inner wall of the end plate 851 is fixedly connected with a telescopic rod 854.

[0050] But the particles that are not blocked for a long time will affect the filtering effect of the subsequent isolation plate, so every certain period of time, the energizing device 83 will energize the coil 82, thereby enhancing the magnetism of the rubidium magnetic ring 81, thereby repelling the rubidium magnetic block 855, and at the same time, the telescopic rod 854 will also extend out, thereby causing the flow guide plate 853 to rotate along the rotating shaft 852, causing the flow guide plate 853 to tilt towards the center of the isolation plate, thereby changing the impact direction of the fracturing fluid on the outside, causing part of the liquid to impact the blocked particles on the inclined surface of the isolation plate, and the blocked particles are flushed into the subsequent spiral mechanism 86. The energizing device 83 can be connected to the manifold pressure control system, and the energizing frequency is automatically adjusted according to the fracturing fluid flow and pressure fluctuation, realizing intelligent anti-blocking.

[0051] The end plate 851 and the isolation plate are integrally formed, and the output end of the telescopic rod 854 is fixedly connected to the outer surface of the rubidium magnet 855. The telescopic rod 854 is a miniature electric push rod with a stroke of 5mm and a thrust of 80N, ensuring that the guide plate 853 can be stably rotated to a tilt angle of 30°.

[0052] like Figures 9-10 As shown, the spiral mechanism 86 includes a central flow pipe 861, one end of which is fixedly connected to an outer ring pipe 862. Channels 863 are evenly arranged on the outer surface of the outer ring pipe 862. Spiral grooves 864 are arranged on the inner wall of the channels 863. A slag discharge groove 865 is arranged in the channel 863 facing the circular part of the outer ring pipe 862. An isolation strip 866 is fixedly connected to the channel 863 near the slag discharge groove 865.

[0053] Liquids and particles passing through the centerline of the isolation plate will pass through the centerline flow pipe 861. These substances will not come into contact with the sealing module 7. Liquids and particles passing through the liquid passage 87 will pass through the channel 863. During the process of passing through the channel 863, the liquids and particles will rotate and move along the spiral groove 864. Under the action of centrifugal force, the particles are thrown towards the slag discharge groove 865 on the spiral groove 864 and continue to move along the slag discharge groove 865. This controls the particles to be in a position relatively close to the center of the branch pipe 6 after leaving the channel 863. At the same time, the liquid flow forms a stable "spiral flow" under the guidance of the spiral groove 864, avoiding disorderly collision of particles caused by turbulence.

[0054] By guiding the particles in the fracturing fluid as described above, the particles in the fracturing fluid will not continuously impact the sealing module 7.

[0055] The centerline flow pipe 861 is fixedly connected to the outer surface of the isolation plate. The centerline flow pipe 861 is located at the centerline of the branch pipe 6 and is connected to the center of the isolation plate without liquid passage hole 87.

[0056] Under ultra-high pressures above 100MPa, traditional planar seals and O-ring seals are prone to elastic deformation of the sealing surface, forming tiny gaps. Fracturing fluid containing proppant can then erode the seal through these gaps, leading to seal failure.

[0057] Furthermore, using O-ring seals alone cannot guarantee a complete sealing contact between the O-ring and the groove.

[0058] like Figure 3 As shown, Figure 3The position represented by X in the formula represents the outside of the second gap groove 61, the branch connecting assembly 5 comprises a short section pipe 51, the short section pipe 51 is provided with a ring groove 52 at the minimum radius of the short section pipe 51, the ring groove 52 is used for mounting an elastic sealing pad 75, the inner wall of the short section pipe 51 is further provided with a first sealing groove 53, the first sealing groove 53 is communicated with the ring groove 52, and the gap groove 54 is formed between the branch pipe 6 and the short section pipe 51, the position of the gap groove 54 is placed with a hydraulic resin-based composite material in the installation process, and the branch pipe 6 is provided with a second gap groove 61 close to the first sealing groove 53; the hydraulic resin-based composite material is of a two-component structure, the A component (epoxy resin E-51) is mixed with the B component (amine curing agent) at a ratio of 10:1, the compressive strength after curing reaches 40 MPa, and the volume shrinkage rate is less than or equal to 0.5%. When all the equipment fails, the fracturing fluid entering the gap groove 54 will also be combined with the hydraulic resin-based composite material and collide, so that the sealing effect is generated.

[0059] The fracturing fluid will impact the sealing assembly, so that the sealing assembly seals the gap between the branch connecting assembly 5 and the branch pipe 6.

[0060] As shown in Figures 4-5 , the sealing module 7 comprises a guide rod 71, the outer surface of the guide rod 71 is slidingly connected with an extrusion plate 72, one side of the extrusion plate 72 facing the direction of the fracturing fluid is provided with a water-facing surface 73, and the outer surface of the extrusion plate 72 is further provided with an extrusion surface 74; the extrusion plate 72 is made of Inconel718 alloy and has a thickness of 10 mm, and can disperse the impact load of the fracturing fluid.

[0061] The sealing module 7 further comprises an elastic sealing pad 75 arranged in the ring groove 52, and the two ends of the elastic sealing pad 75 are respectively provided with a first protrusion 76 and a second protrusion 77. The elastic sealing pad 75 is made of fluorine rubber and carbon fiber, has a Shore hardness of 75HA, can resist high temperature of 150℃, is resistant to oil and acid and alkali corrosion, and meets the elastic deformation requirement under the super-high pressure working condition.

[0062] After the short section pipe 51 and the branch pipe 6 are connected by the bolt and the fracturing fluid is turned on, the impact force of the fracturing fluid will impact the water-facing surface 73 on the extrusion plate 72, so that the extrusion plate 72 impacts the elastic sealing pad 75, the first protrusion 76 and the second protrusion 77 enter the first sealing groove 53 and the second sealing groove respectively, and are precisely fitted with the inner walls of the first sealing groove 53 and the second sealing groove, so that the fracturing fluid cannot enter the gap between the short section pipe 51 and the branch pipe 6.

[0063] The extrusion plate 72 is arranged between the elastic sealing pad 75 and the fracturing fluid impact, and the fracturing fluid only impacts the water-impingement surface 73 of the extrusion plate 72, thereby increasing the sealing performance of the first and second sealing grooves by the first and second protrusions 76 and 77, and making the extrusion surface 74 precisely fit the outer side of the second sealing groove, further hindering the fracturing fluid from entering the gap between the branch connecting assembly 5 and the branch pipeline 6.

[0064] The short section pipe 51 is integrally formed with the main pipe manifold body 1, and the short section pipe 51 is fixed with the branch pipeline 6 by bolts.

[0065] One end of the guide rod 71 is fixedly connected with the outer surface of the ring groove 52, the small radius surface of the elastic sealing pad 75 is in contact with the large radius surface of the extrusion plate 72, the first protrusion 76 is adapted to the position of the first sealing groove 53, and the second protrusion 77 is adapted to the position of the second sealing groove.

[0066] The working process of the ultra-high pressure fracturing manifold with the high sealing installation structure provided by the application is as follows:

[0067] After the fracturing fluid enters the branch pipeline 6, the fracturing fluid first passes through the isolation plate 84, the liquid and particles smaller than 0.3 mm directly pass through the liquid passage hole 87 on the isolation plate 84, and particles larger than 0.3 mm are blocked by the isolation plate 84. Every time interval, the power supply device 83 supplies power to the coil 82 to enhance the magnetism of the rubidium magnetic ring 81, thereby repelling the rubidium magnetic block 855, and the telescopic rod 854 also extends at the same time, so that the flow guide plate 853 rotates along the rotating shaft 852, and the flow guide plate 853 is inclined towards the center of the isolation plate, thereby changing the impact direction of the outer fracturing fluid, so that part of the liquid impacts the blocked particles on the inclined surface of the isolation plate, and the isolated particles are flushed into the subsequent spiral mechanism 86. The liquid and particles passing through the center line of the isolation plate pass through the center line flow pipe 861, and the liquid and particles passing through the liquid passage hole 87 pass through the passage 863. In the process of passing through the passage 863, the liquid and particles rotate and move along the spiral groove 864. Under the action of centrifugal force, the particles are thrown to the deslagging groove 865 on the spiral groove 864 and continue to move along the deslagging groove 865. The particles are controlled to be relatively close to the center of the branch pipeline 6 after leaving the passage 863. Then, the impact force of the fracturing fluid impacts the water-impingement surface 73 on the extrusion plate 72, so that the extrusion plate 72 impacts the elastic sealing pad 75, the first and second protrusions 76 and 77 enter the first and second sealing grooves 53 and 54 respectively, and are precisely fitted with the inner walls of the first and second sealing grooves 53 and 54, so that the fracturing fluid cannot enter the gap between the short section pipe 51 and the branch pipeline 6.

[0068] The above merely preferred embodiments of the present application are not used to limit the present application, any modification, equivalent replacement and improvement etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An ultra-high pressure fracturing manifold having a high sealing installation structure, comprising: The utility model relates to a main pipe body, the top fixed connection of main pipe body is provided with top layer pipeline, be provided with valve on top layer pipeline, the bottom fixed connection of main pipe body is provided with first bottom plate, characterized by further include: The branch connecting assembly, branch pipeline, sealing module for sealing branch connecting assembly and branch pipeline and three -level protection module for protecting sealing module are arranged on the outer surface of main pipe body, The sealing module is arranged between branch connecting assembly and branch pipeline, and the three -level protection module is arranged on the branch pipeline, The end of branch pipeline away from main pipe body is fixedly connected with reducing joint, and the outer surface of reducing joint is fixedly connected with second bottom plate, The branch connecting assembly includes short section pipe, ring groove is arranged at the minimum radius of short section pipe, first sealing groove is further arranged on the inner wall of short section pipe, first sealing groove is communicated with ring groove, gap groove is formed between branch pipeline and short section pipe, water -hardening resin matrix is placed in the position of gap groove during installation, second gap groove is arranged on branch pipeline close to first sealing groove, Fracturing fluid can impact the sealing assembly, so that the sealing assembly seals the gap between the branch connecting assembly and the branch pipeline; The sealing module includes a guide rod, the outer surface of the guide rod is slidably connected with an extrusion plate, one side of the extrusion plate facing the direction of the fracturing fluid is provided with a water-facing surface, and the outer surface of the extrusion plate is further provided with an extrusion surface; The sealing module further includes an elastic sealing gasket arranged in the ring groove, and first and second protrusions are respectively arranged at both ends of the elastic sealing gasket; One end of the guide rod is fixedly connected with the outer surface of the ring groove, the small radius surface of the elastic sealing gasket is in contact with the large radius surface of the extrusion plate, the first protrusion is matched with the position of the first sealing groove, and the second protrusion is matched with the position of the second sealing groove; The three -level protection module includes an isolation plate, one side of the isolation plate facing the fracturing fluid is inclined, facilitating the movement of the blocked particles, the isolation plate is provided with a liquid passage hole, the center of the isolation plate is not provided with a liquid passage hole, the mesh diameter of the liquid passage hole is 0.3-0.5mm, the side of the isolation plate facing the fracturing fluid is provided with a flow guide mechanism, and the side of the isolation plate facing away from the fracturing fluid is provided with a spiral mechanism.

2. The ultra-high pressure fracturing manifold with high sealing installation structure according to claim 1, characterized in that: The short section pipe is integrally connected with the main pipe body, and the short section pipe and the branch pipeline are fixed by bolts.

3. The ultra-high pressure fracturing manifold with high sealing installation structure according to claim 1, characterized in that: The isolation plate is arranged on the inner wall of the branch pipeline, and the isolation plate is integrally formed with the branch pipeline.

4. The ultra-high pressure fracturing manifold with high sealing installation structure according to claim 1, characterized in that: The flow guide mechanism includes an end plate, the inner wall of the end plate is uniformly provided with a rotating shaft, both ends of the rotating shaft are rotatably connected with the inner wall of the end plate, the outer surface of the rotating shaft is fixedly connected with a flow guide plate, and the inner wall of the end plate is fixedly connected with an extension rod.

5. The ultra-high pressure fracturing manifold with high sealing installation structure according to claim 4, characterized in that: The end plate is integrally formed with the isolation plate.

6. The ultra-high pressure fracturing manifold with high sealing installation structure according to claim 1, characterized in that: The spiral mechanism includes a center line flow pipe, one end of the center line flow pipe is fixedly connected with an outer ring pipe, the outer surface of the outer ring pipe is uniformly provided with a channel, the inner wall of the channel is provided with a spiral groove, the channel is provided with a residue discharge groove towards the circular part of the outer ring pipe, and the channel is fixedly connected with an isolation strip close to the residue discharge groove.

7. The ultra-high pressure fracturing manifold with high sealing installation structure according to claim 6, characterized in that: The middle line flow pipe is fixedly connected with the outer surface of the isolation plate, and is located at the axis middle line of the branch pipe and communicated with the center of the isolation plate without liquid hole.

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