Cross-locating packer for quick switching construction process

Abstract

The present application relates to the technical field of oil and gas field development, and is a cross-isolation packer for quick switching construction process, comprising a spray gun, a liner sliding sleeve, a balance valve and a locking assembly, the spray gun and a sand blaster are sleeved on the outside of the liner sliding sleeve in an upper and lower interval, a packer and an anchor are fixed and installed on the upper end of the sand blaster in sequence from bottom to top, and a plurality of radial through spray holes are arranged on the outside of the upper part of the spray gun in an interval. The cross-isolation packer for quick switching construction process can effectively isolate non-operation layer sections, can quickly switch the construction process through lifting and lowering operation in one tripping process, can quickly switch the construction process in one tripping process, can complete different layer section new hole shooting and repeated fracturing operation, and can carry out fine and differentiated development and efficient reconstruction of each layer section of a production well. The present application has the characteristics of short operation cycle, low cost and small construction risk.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field development technology, and is a cross-packer for rapid switching of construction processes. Background Technology

[0002] Economical redevelopment and repeated fracturing of production wells are important means to stabilize and increase oil and gas production in my country's oil and gas fields. The specific conditions of each section in a multi-section oil and gas production well vary greatly: some sections have undergone effective perforation in the past, while others have not; some sections have undergone fracturing in the past, while others have not; some sections have high fracturing initiation rates, while others have low fracturing initiation rates, and reservoir properties differ. During the development and stimulation of oil and gas wells, it is necessary to carry out targeted new perforation and repeated fracturing processes based on the different characteristics of each section to achieve efficient oil and gas production. Currently, the commonly used stimulation techniques for the economical redevelopment and repeated stimulation of production wells are mainly two types: inter-segment temporary plugging stimulation and packer mechanical isolation layer-by-layer stimulation. Inter-segment temporary plugging stimulation has poor controllability and can have certain adverse effects on non-target segments, requiring further improvement. Packer mechanical isolation layer-by-layer stimulation technology typically involves first inserting a perforating tool string into the well to perform perforation operations on previously unperforated segments (re-perforating new holes), and then replacing the perforating tool string with a fracturing tool string before re-inserting into the well to stimulate the reservoir in the fractured segments. This method has a long operation cycle, low construction efficiency, and high cost. In the domestic redevelopment and repeated stimulation of multi-segment oil and gas production wells, there is still no downhole tool that can complete different processes such as new hole perforation and repeated fracturing in different segments during a single tripping operation, enabling efficient exploitation of multi-segment reservoirs. Summary of the Invention

[0003] This invention provides a cross-packer for rapid switching of construction processes, which overcomes the shortcomings of the prior art and can effectively solve the problem that existing production well modification tools cannot complete new hole injection and repeated fracturing in different layers.

[0004] The technical solution of this invention is achieved through the following measures: a cross-section packer for rapid switching of construction processes, comprising a spray gun, a liner sleeve, a balance valve, and a locking assembly. A spray gun and a sandblaster are fitted at intervals on the outer side of the liner sleeve. A packer and an anchor are fixedly installed sequentially from bottom to top on the upper end of the sandblaster. The upper outer side of the spray gun has several radially penetrating spray holes at intervals. The upper outer side of the liner sleeve has upper connecting holes that can be connected one-to-one after downward movement. The lower outer side of the sandblaster has several radially penetrating sandblasting holes at intervals. The lower outer side of the liner sleeve has lower connecting holes that can be connected one-to-one after downward movement. The lower end of the sandblaster is fixedly installed with a mechanism that allows for switching between open and closed states. A balancing valve with switching capability is provided. A central tube is installed at the lower end of the balancing valve. When the balancing valve is open, the inner and outer walls of the balancing valve are connected, and the lower end of the balancing valve is connected to the upper end of the central tube. When the balancing valve is closed, the inner and outer walls of the balancing valve are connected, but the lower end of the balancing valve is not connected to the upper end of the central tube. An upper lock nut and a lower lock nut are provided at intervals on the outer side of the upper part of the central tube corresponding to the position below the balancing valve. A sealing rubber tube is provided on the outer side of the central tube corresponding to the position between the upper and lower lock nuts. A locking component is provided on the outer side of the lower part of the central tube, which can be fixed to the inner side of the sleeve after reciprocating movement. When the locking component moves upward, it can push the lower lock nut to move upward, squeeze the sealing rubber tube, and cause the middle part of the sealing rubber tube to expand outward.

[0005] The following are further optimizations and / or improvements to the above-mentioned technical solution: The lower inner side of the spray gun is provided with at least one inwardly opening strip-shaped first limiting groove at intervals along the circumference. Each first limiting groove is slidably installed with a first slider fixed at a corresponding position on the upper outer side of the liner sleeve. When the lower side of each first slider is in contact with the lower inner wall of the first limiting groove, the upper connecting hole is connected to the spray hole in a one-to-one correspondence. The upper inner side of the sandblaster is provided with at least one inwardly opening strip-shaped second limiting groove at intervals along the circumference. Each second limiting groove is slidably installed with a second slider fixed at a corresponding position on the lower outer side of the liner sleeve. When the lower side of each second slider is in contact with the lower inner wall of the second limiting groove, the lower connecting hole is connected to the sandblasting hole in a one-to-one correspondence. A connecting pipe is fixedly installed between the lower end of the sandblaster and the upper end of the balance valve.

[0006] A connector can be fixedly installed on the upper end of the aforementioned anchor.

[0007] The outer side of the aforementioned sealing tube may be provided with several outward-facing deformable ring grooves at intervals. A spring ring is installed in the deformable ring groove. The inner side of the sealing tube between each pair of adjacent deformable ring grooves is provided with an inward-facing V-shaped fixing ring groove. A matching and fixedly installed convex ring is provided in the fixing ring groove and is fixedly installed on the outer side of the central tube.

[0008] The aforementioned balancing valve may include a lower connector, an upper connector, an upper valve body, a lower valve body, a valve stem, a valve core, and a sealing assembly. The outer side of the upper end of the central tube is fixedly installed together with the inner side of the lower end of the lower connector. The outer side of the upper end of the lower connector is fixedly installed together with the inner side of the lower end of the tubular outer shell. Several radially penetrating external connecting holes are distributed circumferentially on the outer side of the lower part of the outer shell. A connecting sleeve is fixedly installed on the inner side of the upper part of the outer shell. The upper end of the upper connector is fixedly installed together with the lower end of the connecting pipe. The outer side of the lower part of the upper connector is slidably sealed inside the connecting sleeve. The lower end of the upper connector, corresponding to the position below the connecting sleeve, is fixedly fitted with an upper valve body inside the outer shell. A valve stem is fixedly installed on the inner side of the lower end of the valve body. Several flow holes with internal and external communication are evenly distributed along the circumference on the outer side of the lower part of the upper valve body corresponding to the position above the valve stem. A valve seat fitted inside the lower part of the outer shell is fixedly installed on the upper end of the lower connector. An inner connecting hole with internal communication is provided on the inner side of the valve seat corresponding to each external connecting hole position. A funnel-shaped switch hole with a larger upper end and a smaller lower end is provided on the inner side of the upper end of the valve seat. A limiting ring platform is fixed on the outer side of the valve stem corresponding to the position above the valve seat. A valve core matching the switch hole is installed on the outer side of the valve stem corresponding to the upper end of the limiting ring platform. A sealing component that can make sealing contact with the outer side of the valve stem is provided on the inner side of the upper end of the lower connector.

[0009] The aforementioned sealing assembly may include a sealing spacer and a sealing ring. A sealing ring platform is fixed on the inner side of the upper part of the lower connector. A sealing ring is provided at the upper end of the sealing ring platform. Several sealing spacers are arranged sequentially from bottom to top on the upper end of the sealing ring.

[0010] The outer side of the lower part of the aforementioned central tube can be fixed with a supporting outer ring platform, and the inner side of the upper end of the lower lock nut is fixed with a supporting inner ring platform sitting on the outer side of the upper end of the supporting outer ring platform. The outer side of the lower part of the lower lock nut has a conical surface that is larger at the top and smaller at the bottom.

[0011] The aforementioned locking assembly may include a disassembly sleeve, an upper sliding sleeve, rivet catches, a reversing pin, and a pressing assembly. A mounting step surface is provided on the lower outer side of the central tube. A disassembly sleeve is fixedly installed on the lower outer side of the central tube corresponding to the lower end of the mounting step surface. A grooved rotary guide rail extending to the mounting step surface is provided on the lower outer side of the central tube. An upper sliding sleeve is fitted onto the lower outer side of the central tube. An upper mounting sleeve fitted onto the outer side of the central tube is fixedly installed on the upper inner side of the upper sliding sleeve. A rivet catch fitted onto the outer side of the central tube is installed on the upper end of the upper mounting sleeve. The upper part of the rivet catch extends along the lower outer side of the lower lock nut. After moving, it expands outward. A fixed inner ring platform is fixed on the inner side of the upper part of the upper sliding sleeve. A guide slider is installed between the upper end of the fixed inner ring platform and the lower end of the upper mounting sleeve. A reversing pin with its end slidably installed in the grooved rotary guide rail is fixedly installed on the inner side of the guide slider. A support sleeve fitted on the outside of the disassembly sleeve is fixedly installed on the inner side of the lower end of the upper mounting sleeve. A compression component that can abut against the inner wall of the sleeve is installed on the outer side of the middle part of the support sleeve. A connector is fixedly installed on the outer side of the lower part of the support sleeve corresponding to the position below the compression component. A positioner and a guide shoe are fixedly installed on the outer side of the lower part of the connector from top to bottom.

[0012] The aforementioned extrusion assembly may include a friction block. The outer side of the support sleeve has a number of stepped mounting holes that are interconnected and have a larger outer diameter than an inner diameter. Each mounting hole contains a friction block that is thicker in the middle and thinner at the sides. The inner side of the middle of the friction block has an extrusion groove with an inward opening. The upper end of the connector is fixed with a lower limiting ring fitted on the outer side of the lower end of the friction block. The lower end of the upper mounting sleeve is fixed with an upper limiting ring fitted on the outer side of the upper end of the friction block.

[0013] The outer side of the aforementioned friction block may have several outward-facing grooves spaced vertically.

[0014] The lower outer side of the connector located between the corresponding connecting thread and the support sleeve may be provided with a disassembly groove.

[0015] This invention features a reasonable and compact structure. In use, the lower end of the coiled tubing is connected to the anchor. By lifting and lowering the coiled tubing, the liner sleeve slides up and down relative to the nozzle and sandblaster, enabling rapid switching between perforation and fracturing processes. During packer insertion into the well, there is no need to trip the drill string and change tools. In a single trip, simple lifting and lowering operations can complete new perforation for different formations, repeated fracturing, and other construction operations. Rapid perforation operations can be performed on newly added formations. During perforation, the packer sleeve is in a non-setting state, preventing sand settling. Therefore, after perforation, no circulation washing is required before proceeding to the next step, such as reservoir fracturing. The anchor is installed above the nozzle and packer, allowing for precise control of the spray during perforation. The gun is straightened to avoid the risk of sand getting stuck during the operation; the balance valve is linked with the packer. When the packer is lifted, the balance valve opens to balance the pressure inside and outside the packer, which facilitates the rapid release of the packer after fracturing operations; after fluid is injected into the coiled tubing, the coiled tubing is lifted and lowered, and the locking assembly can be fixed to the inner wall of the casing. Then the coiled tubing is lowered, and the lower lock nut moves upward relative to the upper lock nut under the action of the locking assembly. The packer rubber sleeve expands outward under the combined action of the upper and lower lock nuts to achieve setting. During setting, the inner and outer walls of the balance valve are connected to each other, and the upper and lower flow channels of the packer are connected and the pressure is balanced, which improves the stability during setting. In the event of sand settling, a circulation channel can be established through the balance valve to carry out effective sand flushing and well washing operations, which facilitates the release of the packer.

[0016] The cross-packer and packer sleeve combination of the rapid switching construction process of the present invention can effectively isolate non-working sections. The construction process can be quickly switched during a single tripping operation, and can complete the additional perforation and repeated fracturing operations in different sections. It can carry out targeted, refined, differentiated development and efficient transformation of each section of the production well, and has the characteristics of short operation cycle, low cost and low construction risk. Attached Figure Description

[0017] Appendix Figure 1This is a schematic diagram of the upper front cross-sectional structure in embodiments one to eleven of the present invention.

[0018] Appendix Figure 2 This is a schematic diagram of the central front sectional structure in embodiments one to eleven of the present invention.

[0019] Appendix Figure 3 This is a schematic diagram of the lower front cross-sectional structure in embodiments one to eleven of the present invention.

[0020] Appendix Figure 4 For the appendix Figure 1 A top-view, cross-sectional, and enlarged structural diagram of the spray gun.

[0021] Appendix Figure 5 This is a schematic diagram of the main cross-sectional structure of the balance valve in Embodiments 1 to 11 of the present invention.

[0022] Appendix Figure 6 This is a schematic diagram of the front cross-sectional structure of the upper part of the locking component in Embodiments 1 to 11 of the present invention.

[0023] Appendix Figure 7 This is a schematic diagram of the front cross-sectional structure of the lower half of the locking component in Embodiments 1 to 11 of the present invention.

[0024] Appendix Figure 8 This is a schematic diagram of the main cross-sectional structure of another sealing tube in Embodiment 4 of the present invention.

[0025] The codes in the attached diagram are as follows: 1 for anchor, 2 for packer, 3 for spray gun, 4 for nozzle, 5 for upper connecting hole, 6 for sandblaster, 7 for sandblasting hole, 8 for lower connecting hole, 9 for liner sleeve, 10 for first limiting groove, 11 for first slider, 12 for second limiting groove, 13 for second slider, 14 for connecting pipe, 15 for connector, 16 for continuous tubing, 17 for nozzle, 18 for center tube, 19 for upper lock nut, 20 for lower lock nut, 21 for packer sleeve, 22 for deformable ring groove, 23 for spring ring, 24 for fixed ring groove, 25 for convex ring, 26 for lower connector, 27 for upper connector, 28 for outer shell, 29 for outer connecting hole, 30 for connecting sleeve, 31 for upper valve body, 32 for... Valve stem, 33 is the flow hole, 34 is the valve seat, 35 is the internal connecting hole, 36 is the switch hole, 37 is the limit ring platform, 38 is the valve core, 39 is the sealing spacer ring, 40 is the sealing ring, 41 is the sealing ring platform, 42 is the supporting outer ring platform, 43 is the supporting inner ring platform, 44 is the disassembly sleeve, 45 is the upper sliding sleeve, 46 is the rivet slip, 47 is the groove, 48 is the grooved rotary guide rail, 49 is the upper mounting sleeve, 50 is the fixed inner ring platform, 51 is the guide slider, 52 is the reversing pin, 53 is the support sleeve, 54 is the connector, 55 is the friction block, 56 is the mounting hole, 57 is the extrusion groove, 58 is the lower limit ring, 59 is the upper limit ring, 60 is the disassembly groove, 61 is the positioner, and 62 is the guide shoe. Detailed Implementation

[0026] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0027] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0028] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1: As shown in the attached document Figure 1 , 2 As shown in Figures 3 and 4, the cross-separation packer for this rapid switching construction process includes a spray gun 3, a liner sleeve 9, a balance valve, and a locking assembly. The spray gun 3 and a sandblaster 6 are fitted at intervals on the outer side of the liner sleeve 9. A packer 2 and an anchor 1 are fixedly installed sequentially from bottom to top on the upper end of the sandblaster 6. The upper outer side of the spray gun 3 has several radially penetrating spray holes 4 at intervals. The upper outer side of the liner sleeve 9 has upper connecting holes 5 that can be connected to the 4 holes one-to-one after moving downwards. The lower outer side of the sandblaster 6 has several radially penetrating sandblasting holes 7 at intervals. The lower outer side of the liner sleeve 9 has lower connecting holes 8 that can be connected to the sandblasting holes 7 one-to-one after moving downwards. A balance valve that can switch between open and closed states is fixedly installed at the lower end of the sandblaster 6. A central tube 18 is installed at one end. When the balance valve is in the open state, the inner wall and outer wall of the balance valve are connected to each other, and the lower end of the balance valve is connected to the upper end of the central tube 18. When the balance valve is in the closed state, the inner wall and outer wall of the balance valve are connected to each other, and the lower end of the balance valve is not connected to the upper end of the central tube 18. The upper outer side of the central tube 18 corresponding to the position below the balance valve is provided with an upper lock nut 19 and a lower lock nut 20 spaced vertically. The outer side of the central tube 18 corresponding to the position between the upper lock nut 19 and the lower lock nut 20 is sealed with a rubber sleeve 21. The lower outer side of the central tube 18 is provided with a locking component that can be fixed to the inner side of the sleeve after reciprocating movement. When the locking component moves upward, it can push the lower lock nut 20 to move upward and squeeze the rubber sleeve 21, causing the middle part of the rubber sleeve 21 to expand outward.

[0029] According to requirements, each nozzle 17 can be detachably and fixedly installed in each nozzle 4. The anchor 1 is a known hydraulic anchor. By setting the anchor 1, when pressure is applied to the inside of the anchor 1 through the continuous oil pipe 16, the anchor 1 can be anchored to the inner wall of the casing. This can prevent the spray gun 3 from shaking during the perforation process and affecting the perforation effect. The packer 2 is a known cup packer 2. The packer 2 has a self-sealing function and can seal the annulus of the oil sleeve during operation, which facilitates the smooth progress of subsequent operations and also facilitates the handling of unsealing and sand jamming. In special cases, it can be used... Emergency measures (destructive release) can be used to release the packer. A conversion section is installed between the lower end of the packer 2 and the upper end of the spray gun 3 to prevent splashing during the operation from damaging the packer 2. When the locking component moves upward, it pushes the lower lock nut 20 to move upward and squeeze the packer tube 21, causing the middle of the packer tube 21 to expand outward and achieve setting. The spray gun 3 can perform perforation operations. The sandblaster 6 can perform fixed-point fine sandblasting and fracturing modification. The liner sleeve 9 can adjust the packer length by adding or subtracting tubing before construction, according to the length of the required cross-layer section.

[0030] In use, the lower end of the coiled tubing 16 is connected to the anchor 1. By lifting and pressing the coiled tubing 16, the liner sleeve 9 slides up and down relative to the nozzle 3 and the sandblaster 6, enabling rapid switching between perforation and fracturing processes. During the well operation of the packer 2, there is no need to pull out the drill string to change tools. In one trip, simple lifting and lowering operations can complete new perforation and repeated fracturing operations for different formations. Rapid perforation operations can be performed on newly added formations. During perforation, the packer sleeve 21 is in a non-setting state and will not produce sediment. Therefore, after perforation, there is no need for circulation and well washing operations before proceeding to the next step, such as reservoir fracturing. The anchor 1 is installed above the nozzle 3 and the packer 2, which can straighten the nozzle 3 during perforation and avoid... The system mitigates the risk of sand jamming during operation. The balance valve is linked to the packer 2; when the packer 2 is lifted, the balance valve opens to balance the pressure inside and outside the packer 2, facilitating rapid unsealing of the packer 2 after fracturing operations. After fluid injection into the coiled tubing 16, the coiled tubing 16 is lifted and lowered, and the locking assembly can be fixed to the inner wall of the casing. Then, the coiled tubing 16 is lowered, and the lower locking nut 20 moves upward relative to the upper locking nut 19 under the action of the locking assembly. The packer sleeve 21 expands outward under the combined action of the upper locking nut 19 and the lower locking nut 20, achieving setting. During setting, the inner and outer walls of the balance valve are interconnected, and the upper and lower flow channels of the packer 2 are connected and pressure balanced, improving the stability during setting. In the event of sand settling, a circulation channel can be established through the balance valve for effective sand flushing and well washing operations, facilitating the unsealing of the packer 2.

[0031] The packer for rapid switching of construction process is lowered to the target position via coiled tubing 16. Coiled tubing 16 is then raised, with the upper connecting hole 5 and the nozzle 4 connected one-to-one, but the lower connecting hole 8 and the sandblasting hole 7 not connected. The balance valve is closed. After pressurizing the coiled tubing 16, the anchor 1 is anchored to the inner wall of the casing. The packer 2, under self-sealing action, seals the casing annulus between the spray gun 3 and the anchor 1 while protecting the anchor 1. Perforation can then be performed. After perforation (re-perforation) is completed, the coiled tubing 16 is depressurized, the packer 2 is released, and the anchor 1 is reset. The coiled tubing 16 is then raised to the designed fracturing section, and then lowered again so that the section to be fractured is located between the packer sleeve 21 and the packer 2. The sandblasting hole 7 is aligned with the middle of the section to be fractured. The coiled tubing 16 is then lowered further so that the locking assembly can push upwards. The lower locking nut 20 moves upward to squeeze the packer 21, causing the middle of the packer 21 to expand outward. This expansion seals the annulus of the oil sleeve, the balance valve is closed, the upper connecting hole 5 and the spray hole 4 are not connected, and the lower connecting hole 8 and the sandblasting hole 7 are connected one-to-one. After pressurizing the coiled tubing 16, the anchor 1 is anchored to the inner wall of the casing. Fracturing fluid is pumped into the coiled tubing 16 for targeted, precise, and differentiated reservoir fracturing operations. After the fracturing operation is completed, the pressure in the coiled tubing 16 is released, the anchor 1 resets, and the packer 2 and packer 21 are unsealed. The tubing string is lifted, and after the balance valve opens, the packer 2 and packer 21 are smoothly unsealed and reset. Then, the cross-compartment packer for rapid switching of construction technology can be lifted out. The cross-compartment packer for rapid switching of construction technology returns to its initial state, ready for the next stage of operation.

[0032] The cross-packer packer 2 and packer sleeve 21 of the present invention, which allows for rapid switching of construction processes, can effectively isolate non-working sections. The construction process can be quickly switched during a single tripping operation, enabling the completion of new hole perforation and repeated fracturing operations in different sections. It allows for targeted, refined, and differentiated development and efficient modification of each section of the production well, and features short operation cycle, low cost, and low construction risk.

[0033] The cross-bay packer described above for rapid switching of construction techniques can be further optimized and / or improved as needed: Example 2: As an optimization of the above examples, as shown in the appendix. Figure 1 , 4As shown, the spray gun 3 has at least one inwardly opening strip-shaped first limiting groove 10 spaced along the circumference on the lower inner side. Each first limiting groove 10 has a first slider 11 slidably installed in the corresponding position on the upper outer side of the liner sleeve 9. When the lower side of each first slider 11 is in contact with the lower inner wall of the first limiting groove 10, the upper connecting hole 5 is connected to the spray hole 4 in a one-to-one correspondence. The sandblaster 6 has at least one inwardly opening strip-shaped second limiting groove 12 spaced along the circumference on the upper inner side. Each second limiting groove 12 has a second slider 13 slidably installed in the corresponding position on the lower outer side of the liner sleeve 9. When the lower side of each second slider 13 is in contact with the lower inner wall of the second limiting groove 12, the lower connecting hole 8 is connected to the sandblasting hole 7 in a one-to-one correspondence. A connecting pipe 14 is fixedly installed between the lower end of the sandblaster 6 and the upper end of the balance valve.

[0034] The liner sleeve 9 is connected to the spray gun 3 and the sandblaster 6 via the first slider 11 and the second slider 13. The first slider 11 and the second slider 13 can both limit the movement and share the working load during the process of lifting and pressing the continuous tubing 16 at the upper end of the anchor 1. This allows the upper connecting hole 5 to be connected to the spray hole 4 in a one-to-one correspondence or the lower connecting hole 8 to the sandblasting hole 7 in a one-to-one correspondence. The perforation and fracturing conditions can be switched by lifting and pressing the continuous tubing 16. The connecting pipe 14 can be connected to the sandblaster 6 and the balance valve, which facilitates the control of the balance valve, the sealing sleeve 21 and the locking assembly.

[0035] The surface of the spray gun 3 is hardened to reduce damage to the spray gun 3 caused by splashed liquid during operation. To facilitate the installation of the first slider 11, the spray gun 3 is a threaded, split structure, comprising a spray gun body and a spray gun sleeve screwed together. A first limiting groove 10 is formed between the spray gun sleeve and the lower end of the spray gun body. At least one first O-ring seal is provided vertically between the inner side of the lower end of the spray gun sleeve and the outer side of the liner sleeve 9. The first limiting groove 10 can limit the movement of the first slider 11. (Continuous upward lifting...) After the oil pipe 16, when the lower side of the first slider 11 contacts the lower inner wall of the first limiting groove 10, the upper connecting hole 5 and the nozzle 4 are connected one-to-one. At this time, after the perforating fluid is pumped in, the perforating operation can be performed through the nozzle 4. After the continuous oil pipe 16 is pressed down, the first slider 11 moves upward and the upper connecting hole 5 and the nozzle 4 are misaligned and closed. In order to improve the sealing performance, a second O-ring is provided on the inner side of the spray gun body at the position between the nozzle 4 and the first limiting groove 10, and on the outer side of the upper end of the liner sleeve 9 above the upper connecting hole 5.

[0036] Similarly, to facilitate the installation of the second slider 13, the sandblaster 6 also adopts a split structure with threaded connection. The sandblaster 6 includes a sandblaster body and a sandblasting sleeve that are screwed together. A second limiting groove 12 is formed between the upper end of the sandblaster body and the sandblasting sleeve. At least one third O-ring is provided at intervals between the inner side of the upper end of the sandblasting sleeve and the outer side of the liner sleeve 9. The second limiting groove 12 can limit the second slider 13. When the continuous tubing 16 is pressed down, the lower side of the second slider 13 contacts the lower inner wall of the second limiting groove 12. The lower connecting hole 8 and the sandblasting hole 7 are connected one-to-one. At this time, sandblasting fracturing operations can be performed through the sandblasting hole 7. After the continuous tubing 16 is lifted, the spray gun 3 drives the liner sleeve 9 to move upward, so that the lower connecting hole 8 and the sandblasting hole 7 are misaligned and closed. In order to improve the sealing performance, a fourth O-ring is provided on the outer side of the lower end of the liner sleeve 9 below the sandblasting hole 7 and on the inner side of the sandblaster body between the second limiting groove 12 and the lower connecting hole 8.

[0037] To allow for independent operation of perforation and sandblasting fracturing, in the initial state, the upper side of the first slider 11 is in contact with the upper inner wall of the first limiting groove 10, and there is a gap between the lower side of the second slider 13 and the lower inner side of the second limiting groove 12. After the continuous tubing 16 is pressed down, the liner sleeve 9 is pressed down by the spray gun 3, causing the second slider 13 to move downward within the second limiting groove 12. When the lower side of the second slider 13 is in contact with the lower inner side of the second limiting groove 12, the lower connecting hole 8 and the sandblasting hole 7 are connected one-to-one, and the sandblasting hole 7 is opened. At this time, the upper connecting hole 5 and the spray hole 4 are offset from each other, and the spray hole 4 is closed. Sandblasting fracturing can then be performed independently through the sandblasting hole 7.

[0038] After the coiled tubing 16 is lifted, the first slider 11 moves downward relative to the first limiting groove 10. When the lower side of the first slider 11 contacts the lower inner side of the first limiting groove 10, the upper connecting hole 5 and the spray hole 4 are connected one-to-one, and the spray hole 4 is opened. At this time, the coiled tubing 16 is lifted again, and the spray gun 3 acts on the first slider 11, causing the liner sleeve 9 to move upward, that is, the second slider 13 moves upward in the second limiting groove 12, so that the lower connecting hole 8 and the sandblasting hole 7 are misaligned and closed, and the sandblasting hole 7 is closed. During this process, the spray hole 4 is opened and always remains open. At this time, the perforation operation can be carried out separately through the spray hole 4.

[0039] Example 3: As an optimization of the above examples, as shown in the appendix. Figure 1 As shown, a connector 15 is fixedly installed on the upper end of the anchor 1.

[0040] As required, connector 15 is a known existing tubing connector 15. This design facilitates quick assembly and disassembly of the continuous tubing 16 and the tool during use, and also facilitates the transportation of the tool.

[0041] Example 4: As an optimization of the above examples, as shown in the appendix. Figure 3 , 6 As shown, the outer side of the sealing tube 21 is provided with several outward-facing deformable annular grooves 22 at intervals. A spring ring 23 is installed in the deformable annular groove 22. The inner side of the sealing tube 21 between each pair of adjacent deformable annular grooves 22 is provided with an inward-facing V-shaped fixing annular groove 24. A matching and fixedly installed convex ring 25 is provided in the fixing annular groove 24 on the outer side of the central tube 18.

[0042] During use, the outer side of the packer tube 21 is provided with several outward-facing deformation annular grooves 22. Between each pair of adjacent deformation annular grooves 22, the inner side of the packer tube 21 is provided with an inward-facing V-shaped fixing annular groove 24. The middle of the packer tube 21 has an M-shaped structure, which improves the internal stress distribution of the packer tube 21 and the contact stress with the sleeve wall. Depending on the requirements, the packer tube 21 adopts a multi-hardness integrated molding technology. The hardness at both ends of the packer tube 21 is greater than that at the middle. The high hardness at both ends of the packer tube 21 provides support and auxiliary sealing. After compression, the middle of the packer tube 21 adheres tightly to the sleeve wall to achieve pressure sealing. Spring rings 23 are embedded in the deformation annular grooves 22, which improves the anti-protrusion performance at both ends of the packer tube 21 during compression, ensuring the sealing shape of the packer tube 21, improving sealing capacity and recovery force after unsealing, and facilitating the setting and unsealing operations of the packer 2.

[0043] As attached Figure 8 As shown, the sealing tube 21 may also have an arc-shaped deformable annular groove 22 with an inward opening on the inner side. Both the upper and lower ends of the sealing tube 21 are chamfered, and the lower end of the upper lock nut 19 and the upper end of the lower lock nut 20 are fixed with a conical sleeve that matches the chamfer.

[0044] Example 5: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2As shown in Figure 5, the balancing valve includes a lower connector 26, an upper connector 27, an upper valve body 31, a lower valve body, a valve stem 32, a valve core 38, and a sealing assembly. The outer side of the upper end of the central tube 18 is fixedly installed together with the inner side of the lower end of the lower connector 26. The outer side of the upper end of the lower connector 26 is fixedly installed together with the inner side of the lower end of the tubular outer shell 28. Several radially penetrating external connecting holes 29 are distributed at intervals along the circumference of the lower outer side of the outer shell 28. A connecting sleeve 30 is fixedly installed on the inner side of the upper part of the outer shell 28. The upper end of the upper connector 27 is fixedly installed together with the lower end of the connecting tube 14. The outer side of the lower part of the upper connector 27 is slidably sealed inside the connecting sleeve 30. The lower end of the upper connector 27, corresponding to the position below the connecting sleeve 30, is fixedly fitted with an upper valve body 31 inside the outer shell 28. A valve stem 32 is fixedly installed on the inner side of the lower end of the body 31. A number of flow holes 33 with internal and external communication are evenly distributed along the circumference on the outer side of the lower part of the upper valve body 31 corresponding to the position above the valve stem 32. A valve seat 34 fitted into the inner side of the lower part of the outer shell 28 is fixedly installed on the upper end of the lower connector 26. An inner communication hole 35 with internal and external communication is provided on the inner side of the valve seat 34 corresponding to the position of each outer communication hole 29. A funnel-shaped switch hole 36 with a larger upper end and a smaller lower end is provided on the inner side of the upper end of the valve seat 34. A limiting ring platform 37 is fixed on the outer side of the valve stem 32 corresponding to the position above the valve seat 34. A valve core 38 matching the switch hole 36 is installed on the outer side of the valve stem 32 corresponding to the position above the limiting ring platform 37. A sealing component that can make sealing contact with the outer side of the valve stem 32 is provided on the inner side of the upper end of the lower connector 26.

[0045] As required, a switch step surface is provided on the inner side of the middle part of the funnel-shaped switch hole 36. During use, with this setup, when the continuous tubing 16 is raised or lowered, the valve stem 32 moves upward and the balance valve is in the open state, separating the valve core 38 from the valve seat 34. The upper connector 27 and the central tube 18 are internally connected, thus connecting the upper and lower parts of the sealing sleeve 21, the tubing, and the annulus. It also allows the upper and lower annulus to be reliably separated during perforation through the expanded sealing sleeve 21. When the valve stem 32 moves downward, the balance valve is in the closed state. After the valve stem 32 moves downward, it inserts into the sealing assembly, preventing the upper connector 27 and the central tube 18 from being internally connected. At the same time, the limiting ring platform 37 leaves a gap between the valve core 38 and the valve seat 34, allowing the inner and outer walls of the balance valve to be connected. This allows for both reverse and forward circulation. Reverse circulation can be achieved in the setting state. By setting the limiting ring platform 37, a distance is always maintained between the valve core 38 and the valve seat 34, allowing forward circulation to be achieved when the continuous tubing 16 encounters resistance during raising or lowering.

[0046] During fracturing operations, the coiled tubing 16 is pressed down, and the balance valve is in the closed state. After the fracturing operation is completed, the coiled tubing 16 is pulled up, and the balance valve is in the open state. The pressure can be relieved through the external connecting hole 29 so that the packer sleeve 21 can be unsealed.

[0047] Example 6: As an optimization of the above examples, as shown in the appendix Figure 2 , 5 As shown, the sealing assembly includes a sealing spacer 39 and a sealing ring 40. A sealing ring platform 41 is fixed on the inner side of the upper part of the lower connector 26. A sealing ring 40 is provided on the upper end of the sealing ring platform 41. Several sealing spacers 39 are arranged sequentially from bottom to top on the upper end of the sealing ring 40.

[0048] Depending on the requirements, the sealing ring 40 is a known existing technology, such as a Y-type sealing ring 40. During use, it facilitates the assembly and disassembly of the sealing component and also improves the sealing performance between the sealing component and the valve stem 32.

[0049] Example 7: As an optimization of the above examples, as shown in the appendix. Figure 2 , 3 As shown in Figure 6, a supporting outer ring platform 42 is fixed on the lower outer side of the central tube 18, and a supporting inner ring platform 43 is fixed on the upper inner side of the lower lock nut 20, which sits on the upper outer side of the supporting outer ring platform 42. The lower outer side of the lower lock nut 20 has a conical surface that is larger at the top and smaller at the bottom.

[0050] During use, the outer ring support 42 and the inner ring support 43 can limit the sliding of the lower lock nut 20, which facilitates the disassembly and maintenance of the sealing rubber tube 21. The lower outer side of the lower lock nut 20 is a conical surface that is larger at the top and smaller at the bottom. When the locking component slides upward, it can prevent excessive pressure on the sealing rubber tube 21, which may cause it to break.

[0051] Example 8: As an optimization of the above examples, as shown in the appendix Figure 3 , 6 As shown in Figure 7, the locking assembly includes a disassembly sleeve 44, an upper sliding sleeve 45, a rivet catch 46, a reversing pin 52, and a pressing assembly. The lower outer side of the central tube 18 has a mounting step surface. A disassembly sleeve 44 is fixedly installed on the lower outer side of the central tube 18 corresponding to the lower end of the mounting step surface. A grooved rotary guide rail 48 extending to the mounting step surface is provided on the lower outer side of the central tube 18. An upper sliding sleeve 45 is fitted onto the lower outer side of the central tube 18. An upper mounting sleeve 49, fitted onto the outer side of the central tube 18, is fixedly installed on the upper inner side of the upper sliding sleeve 45. A rivet catch 46, fitted onto the outer side of the central tube 18, is installed on the upper end of the upper mounting sleeve 49. The upper part of the rivet catch 46 extends along the lower lock nut 20. After the outer side moves, it expands outward. A fixed inner ring platform 50 is fixed on the inner side of the upper part of the upper sliding sleeve 45. A guide slider 51 is installed between the upper end of the fixed inner ring platform 50 and the lower end of the upper mounting sleeve 49. A reversing pin 52 with its end slidably installed in the grooved rotary guide rail 48 is fixedly installed on the inner side of the guide slider 51. A support sleeve 53 fitted on the outer side of the disassembly sleeve 44 is fixedly installed on the inner side of the lower end of the upper mounting sleeve 49. A compression component that can abut against the inner wall of the sleeve is installed on the outer side of the middle part of the support sleeve 53. A connector 54 is fixedly installed on the outer side of the lower part of the support sleeve 53 corresponding to the position below the compression component. A positioner 61 and a guide shoe 62 are fixedly installed on the outer side of the lower part of the connector 54 from top to bottom.

[0052] According to the requirements, the positioner 61 is a known coupling positioner. During the lifting and anchoring of the coiled tubing 16, ground operators can use the positioner 61 to locate the section to be constructed by observing the tonnage change at the casing coupling. The rivet slip 46 is a known technology, with slip teeth on the outer side of its upper end. The grooved rotary guide rail 48 is a known technology, such as the grooved rotary guide rail 48 in the positive and negative circulation internal blowout preventer device (CN211058759U). The end of the reversing pin 52 is located on the inner side of the lower short groove 47. A clear channel is provided between the upper inner wall of the grooved rotary guide rail 48 and the inner side of the central tube 18. The cleaning holes allow for cleaning and lubrication of the grooved rotary guide rail 48. Several through holes, connected internally and externally, are spaced along the circumference of the center tube 18 corresponding to the rivet slip 46 position. This allows for lubrication and cleaning of the slip teeth of the rivet slip 46 and the conical surface of the lower locking nut 20. When the upper connecting hole 5 is connected to the spray hole 4 in a one-to-one correspondence, the moving distance of the first slider 11 and the moving distance of the second slider 13 when the lower connecting hole 8 is connected to the sandblasting hole 7 in a one-to-one correspondence are both less than the moving distance of the reversing pin 52 within the lower short groove 47 of the grooved rotary guide rail 48. The guide shoe 62 is a known prior art, and its design facilitates smooth tool entry into the well. The locking assembly can also be a known prior art.

[0053] During use, the continuous tubing 16 is lowered, which pushes the central tube 18 and the extrusion assembly forward within the casing. When the extrusion assembly reaches a predetermined depth, the liquid inside the central tube 18 acts on the extrusion assembly, causing the outer side of the extrusion assembly to abut against the inner wall of the casing. This allows the extrusion assembly to fix the rivet slip 46, the support sleeve 53, and the upper mounting sleeve 49 within the casing. After the continuous tubing 16 is lifted, the upper mounting sleeve 49 and the upper sliding sleeve 45 cause the central tube 18 to move upward. Then, the continuous tubing 16 is lowered again, and the reversing pin 52 slides from the lower short groove 47 of the grooved rotary guide rail 48 to the lower long groove 47, causing the lower locking nut 20 to press against the upper inner side of the rivet slip 46. This causes the lower locking nut 20 to move upward and press against the sealing rubber cylinder 21, thus causing the sealing rubber cylinder to... After the middle part of the 21 expands outward, it sits on the inner wall of the casing. At the same time, the upper part of the rivet slip 46 expands outward and can be fixed on the inner wall of the casing. This fixes the packer 21. When the coiled tubing 16 is lowered, the upper mounting sleeve 49 and the upper sliding sleeve 45 rotate at a certain angle under the action of the reversing pin 52. Repeatedly raising and lowering the coiled tubing 16 can set the fracturing nozzle 3 in multiple positions, which is convenient for perforating the inner wall of the casing in multiple positions, thereby performing perforation operations on the formation. At the same time, during the process of lowering the coiled tubing 16, the lower lock nut 20 and the inner side of the upper part of the rivet slip 46 can also squeeze each other, so that the upper part of the rivet slip 46 expands outward and is fixed on the inner wall of the casing. This fixes the packer 21 and facilitates subsequent perforation operations.

[0054] During the operation, the coiled tubing 16 is continuously lowered when the tool string enters the well. When the tool string reaches the expected perforation position, the coiled tubing 16 is lifted and anchored. The upper connecting hole 5 and the nozzle 4 are connected one-to-one, but the lower connecting hole 8 and the sandblasting hole 7 are not connected. At this time, the perforation operation can be carried out. When the tool string reaches the expected fracturing position, the coiled tubing 16 is lifted to a certain height and then lowered again. After the upper part of the slip expands outward, it is fixed to the inner wall of the casing. Under the action of axial pressure, the packer sleeve 21 is set and sealed. The coiled tubing 16 continues to be pressed down, and the liner sleeve 9 moves downward. The upper connecting hole 5 and the nozzle 4 are not connected, and the balance valve is in the closed state. However, the lower connecting hole 8 and the sandblasting hole 7 are connected one-to-one. At this time, the fracturing operation can be carried out.

[0055] Example 9: As an optimization of the above examples, as shown in the appendix Figure 3 , 7 As shown, the extrusion assembly includes a friction block 55. The outer side of the support sleeve 53 has several stepped mounting holes 56 that are interconnected and have a larger outer diameter than the inner diameter. Each mounting hole 56 contains a friction block 55 that is thicker in the middle and thinner at both sides. The inner side of the middle of the friction block 55 has an extrusion groove 57 with an inward opening. The upper end of the connector 54 is fixed with a lower limit ring 58 that is fitted onto the outer side of the lower end of the friction block 55. The lower end of the upper mounting sleeve 49 is fixed with an upper limit ring 59 that is fitted onto the outer side of the upper end of the friction block 55.

[0056] During use, by setting the upper limit ring 59 and the lower limit ring 58, the friction block 55 and the support sleeve 53 can be prevented from separating from each other, and the disassembly and assembly of the friction block 55 and the support sleeve 53 can be facilitated, reducing subsequent maintenance costs. By setting the stepped mounting hole 56 with a larger outer diameter and a smaller inner diameter, the fluid in the central tube 18 can act on the inner side of the friction block 55 through the mounting hole 56, so that the outer side of the friction block 55 can abut against the inner wall of the casing, reducing the use of elastic elements. This increases the force between the outer side of the friction block 55 and the inner wall of the casing, making the friction block 55 fixed and stable, which facilitates subsequent setting and sealing operations and the opening and closing state of the balance valve when the coiled tubing 16 is raised and lowered. The inner side of the friction block 55 is provided with a squeezing groove 57, so that the fluid in the central tube 18 flows into the squeezing groove 57 after passing through the mounting hole 56, and acts on the inner side of the friction block 55, so that the outer side of the friction block 55 can abut against the inner wall of the casing, improving the setting efficiency.

[0057] Example 10: As an optimization of the above embodiments, as shown in the appendix Figure 7 As shown, the friction block 55 has several outward-facing grooves 47 spaced vertically on its outer side.

[0058] Depending on the requirements, the groove 47 can be rectangular or arc-shaped. During use, by setting the arc-shaped groove 47, the friction block 55 can be more easily fixed on the inner wall of the sleeve.

[0059] Example 11: As an optimization of the above embodiments, as shown in the appendix. Figure 3 , 7 As shown, a disassembly groove 60 is provided on the lower outer side of the connector 54, which is located between the connecting thread and the support sleeve 53.

[0060] During use, this design facilitates the assembly and disassembly of the support sleeve 53, connector 54, and oil pipe.

[0061] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0062] The usage process of the preferred embodiment of the present invention: Assemble and inspect the cross-section packer for quick switching of construction process in sequence. The reversing pin 52 is located in the lower short groove 47 of the grooved rotary guide rail 48. The balance valve is in the closed state. The lower connecting hole 8 and the sandblasting hole 7 are not connected to each other. After the cross-separation packer, which quickly switches the construction process, passes the planned section, the coiled tubing 16 is raised, and the construction section is positioned by the positioner 61. Raise the continuous tubing 16, and the upper connecting hole 5 and the spray hole 4 are connected one by one, but the lower connecting hole 8 and the sandblasting hole 7 are not connected to each other, and the balance valve is still in the closed state. Continue to raise the coiled tubing 16. Once the spray gun 3 is positioned at the designed location in the perforation section, perforation can begin. After pressurization within the coiled tubing 16, the anchor 1 is anchored to the inner wall of the casing. The cup packer 2, under its self-sealing action, seals the casing annulus between the spray gun 3 and the hydraulic anchor 1, while simultaneously protecting the hydraulic anchor 1. At this time, the balance valve is closed, the lower connecting hole 8 and the sandblasting hole 7 are not connected to each other, and the upper connecting hole 5 and the spraying hole 4 are connected one-to-one. The pump in the coiled tubing 16 injects perforating fluid to perform perforation (re-perforation) operations.

[0063] After the perforation (re-perforation) operation is completed, the coiled tubing 16 is depressurized, the packer 2 is released, and the hydraulic anchor 1 is reset. After raising the coiled tubing 16 to the designed fracturing section, lower the coiled tubing 16 according to the design requirements so that the section to be fractured is located between the packer sleeve 21 and the cup packer 2, and the sandblasting hole 7 is aligned with the middle of the section to be fractured. Continue lowering the continuous tubing 16, causing the reversing pin 52 to slide from the lower short groove 47 of the grooved rotary guide rail 48 to the lower long groove 47. During the lowering process, the friction block 55 generates an upward frictional force by rubbing against the inner wall of the casing, causing the teeth of the rivet slip 46 to open and push the lower lock nut 20 to move upward. Finally, the sealing sleeve 21 expands and seals the annulus of the oil sleeve. The balance valve is in the closed state, the upper connecting hole 5 and the spray hole 4 are not connected to each other, and the lower connecting hole 8 and the sandblasting hole 7 are connected one by one. The fracturing fluid was pumped into the coiled tubing 16 for targeted, precise, and differentiated reservoir fracturing and stimulation operations. After the fracturing operation was completed, the hydraulic anchor 1 was reset and the packer 2 was unsealed after the pressure was released inside the coiled tubing 16. After the tubing is lifted and the balancing valve is opened, the pressure on the packer 2 is balanced, allowing for smooth unsealing. The valve stem 32 is pulled out of the sealing assembly, making the inner hole between the upper and lower connectors 26 of the balancing valve fully open. The pressure on the packer 21 and the packer 2 is connected, and the packer 21 and the packer 2 are reset, achieving smooth unsealing of the packer 21 and the packer 2. Then, the cross-packer that allows for rapid switching of construction processes can be lifted out. The cross-section packer, which quickly switched construction techniques, returned to its initial state, ready for the next stage of work.

Claims

1. A cross-bay packer for rapid switching of construction processes, characterized in that... The system includes a spray gun, a liner sleeve, a balance valve, and a locking assembly. The spray gun and sandblaster are fitted at intervals on the outer side of the liner sleeve. A packer and an anchor are fixedly installed sequentially from bottom to top on the upper end of the sandblaster. The upper outer side of the spray gun has several radially penetrating spray holes at intervals. The upper outer side of the liner sleeve has an upper connecting hole that can be moved downwards to connect with each corresponding hole. The lower outer side of the sandblaster has several radially penetrating sandblasting holes at intervals. The lower outer side of the liner sleeve has a lower connecting hole that can be moved downwards to connect with each sandblasting hole. A balance valve that can switch between open and closed states is fixedly installed at the lower end of the sandblaster. A central... When the balance valve is in the open state, the inner wall and outer wall of the balance valve are connected to each other, and the lower end of the balance valve is connected to the upper end of the central tube. When the balance valve is in the closed state, the inner wall and outer wall of the balance valve are connected to each other, and the lower end of the balance valve is not connected to the upper end of the central tube. The upper outer side of the central tube corresponding to the position below the balance valve is provided with an upper lock nut and a lower lock nut at intervals. The outer side of the central tube corresponding to the position between the upper lock nut and the lower lock nut is sealed with a rubber sleeve. The lower outer side of the central tube is provided with a locking component that can be fixed to the inner side of the sleeve after reciprocating movement. When the locking component moves upward, it can push the lower lock nut to move upward and squeeze the sealing rubber sleeve, causing the middle part of the sealing rubber sleeve to expand outward. The spray gun has at least one inwardly opening strip-shaped first limiting groove spaced along the circumference of its lower inner side. Each first limiting groove has a first slider fixed to the corresponding position on the upper outer side of the liner sleeve. When the lower side of each first slider is in contact with the lower inner wall of the first limiting groove, the upper connecting hole is connected to the spray hole. The sandblaster has at least one inwardly opening strip-shaped second limiting groove spaced along the circumference of its upper inner side. Each second limiting groove has a second slider fixed to the corresponding position on the lower outer side of the liner sleeve. When the lower side of each second slider is in contact with the lower inner wall of the second limiting groove, the lower connecting hole is connected to the sandblasting hole. A connecting pipe is fixedly installed between the lower end of the sandblaster and the upper end of the balance valve. A connector is fixedly installed at the upper end of the anchor. The outer side of the sealing tube is provided with several outward-facing deformable ring grooves at intervals. A spring ring is installed in the deformable ring groove. The inner side of the sealing tube between each pair of adjacent deformable ring grooves is provided with an inward-facing V-shaped fixing ring groove. A matching and fixedly installed convex ring is provided in the fixing ring groove on the outside of the central tube. The balancing valve includes a lower connector, an upper connector, an upper valve body, a lower valve body, a valve stem, a valve core, and a sealing assembly. The outer side of the upper end of the central tube is fixedly installed with the inner side of the lower end of the lower connector. The outer side of the upper end of the lower connector is fixedly installed with the inner side of the lower end of the tubular outer shell. Several radially penetrating external connecting holes are distributed circumferentially on the outer side of the lower part of the outer shell. A connecting sleeve is fixedly installed on the inner side of the upper part of the outer shell. The upper end of the upper connector is fixedly installed with the lower end of the connecting tube. The outer side of the lower part of the upper connector is slidably sealed within the connecting sleeve. The lower end of the upper connector, corresponding to the position below the connecting sleeve, is fixedly fitted with an upper valve body inside the outer shell. A valve stem is fixedly installed on the inner side of the lower end. Several flow holes with internal and external communication are evenly distributed along the circumference on the outer side of the lower part of the upper valve body corresponding to the position above the valve stem. A valve seat fitted on the inner side of the lower part of the outer shell is fixedly installed on the upper end of the lower connector. An inner communication hole with internal and external communication is provided on the inner side of the valve seat corresponding to the position of each outer communication hole. A funnel-shaped switch hole with a larger upper end and a smaller lower end is provided on the inner side of the upper end of the valve seat. A limit ring platform is fixed on the outer side of the valve stem corresponding to the position above the valve seat. A valve core matching the switch hole is installed on the outer side of the valve stem corresponding to the upper end of the limit ring platform. A sealing component that can make sealing contact with the outer side of the valve stem is provided on the inner side of the upper end of the lower connector.

2. The cross-bay packer for rapid switching of construction processes according to claim 1, characterized in that... The sealing assembly includes a sealing spacer ring and a sealing ring. A sealing ring platform is fixed on the inner side of the upper part of the lower connector. A sealing ring is provided at the upper end of the sealing ring platform. Several sealing spacer rings are arranged sequentially from bottom to top on the upper end of the sealing ring.

3. The cross-bay packer for rapid switching of construction processes according to claim 1 or 2, characterized in that... A supporting outer ring platform is fixed to the lower outer side of the central tube, and a supporting inner ring platform is fixed to the upper inner side of the lower lock nut, which sits on the upper outer side of the supporting outer ring platform. The lower outer side of the lower lock nut has a conical surface that is larger at the top and smaller at the bottom.

4. The cross-bay packer for rapid switching of construction processes according to claim 3, characterized in that... The locking assembly includes a disassembly sleeve, an upper sliding sleeve, rivet catches, a reversing pin, and a pressing assembly. The lower outer side of the central tube has a mounting step surface. A disassembly sleeve is fixedly installed on the lower outer side of the central tube corresponding to the lower end of the mounting step surface. A grooved rotary guide rail extending to the mounting step surface is provided on the lower outer side of the central tube. An upper sliding sleeve is fitted onto the lower outer side of the central tube. An upper mounting sleeve fitted onto the outer side of the central tube is fixedly installed on the upper inner side of the upper sliding sleeve. A rivet catch fitted onto the outer side of the central tube is installed on the upper end of the upper mounting sleeve. The upper part of the rivet catch moves along the lower outer side of the lower lock nut. It expands outwards. A fixed inner ring platform is fixed on the inner side of the upper part of the upper sliding sleeve. A guide slider is installed between the upper end of the fixed inner ring platform and the lower end of the upper mounting sleeve. A reversing pin with its end slidably installed in a grooved rotary guide rail is fixedly installed on the inner side of the guide slider. A support sleeve fitted on the outer side of the disassembly sleeve is fixedly installed on the inner side of the lower end of the upper mounting sleeve. A compression component that can abut against the inner wall of the sleeve is installed on the outer side of the middle part of the support sleeve. A connector is fixedly installed on the outer side of the lower part of the support sleeve corresponding to the position below the compression component. A positioner and a guide shoe are fixedly installed on the outer side of the lower part of the connector from top to bottom.

5. The cross-bay packer for rapid switching of construction processes according to claim 4, characterized in that... The extrusion assembly includes a friction block. The outer side of the support sleeve has several stepped mounting holes that are interconnected and have a larger outer diameter than an inner diameter. Each mounting hole contains a friction block that is thicker in the middle and thinner at the sides. The inner side of the middle of the friction block has an extrusion groove with an inward opening. The upper end of the connector is fixed with a lower limit ring fitted on the outer side of the lower end of the friction block. The lower end of the upper mounting sleeve is fixed with an upper limit ring fitted on the outer side of the upper end of the friction block.

6. The cross-bay packer for rapid switching of construction processes according to claim 5, characterized in that... The friction block has several outward-facing grooves spaced at intervals on its outer side.

7. The cross-bay packer for rapid switching of construction processes according to claim 4, 5, or 6, characterized in that... A disassembly groove is provided on the lower outer side of the connector, which is located between the connecting thread and the support sleeve.

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