A wellbore switch tool capable of bearing high pressure

Abstract

The utility model discloses a wellbore switch tool for bearing lower high pressure, which belongs to the field of wellbore pressure control of oilfields, including an anti-blocking seal module, a one-way locking module, a two-way anchoring module, a compression sealing module and a towing sleeve module; the anti-blocking seal module provides power support for the tool; the one-way locking module provides one-way stepping automatic locking for the tool; the two-way anchoring module helps the tool to stay in the well and anchor it to the casing, and bear the axial force formed by the hydraulic pressure at both ends, its own gravity and the downward pressure load applied by the upper pipe column; the compression sealing module provides compression sealing support for the tool and the casing, and provides restoring elastic support for the one-way anchoring mechanism; the towing sleeve module controls the communication or blocking of the lower high-pressure space and the upper low-pressure space in the form of forced towing sleeves, thereby controlling the lower high-pressure fluid of the tool. The beneficial effect of the utility model is that it can be widely used in the repeated communication and blocking control of the lower high pressure of the wellbore in the oilfield.

Description

Technical Field

[0001] The utility model relates to the field of packer bridge plugs for controlling wellbore pressure in oil fields, in particular to a wellbore switch tool capable of bearing high pressure. Background Art

[0002] At present, oil fields often use bridge plugs to temporarily block and control the high pressure at the bottom of the wellbore. In order to protect the anchor support mechanism from drilling and to resist the pressure on the top of the bridge plug, the basic structure of the common bridge plug is that the slips are placed below the compression rubber cylinder, and the elastic restoring force of the upper rubber cylinder is used to maintain the support and anchoring of the cone and slips; ordinary cut-off dead seals or movable one-way valves are used to temporarily block and control the high pressure at the bottom. Due to the structural reasons of this structure itself, it has the following functional defects: 1. When the bridge plug is subjected to the lower high pressure, the rubber cylinder is reversely compressed upward, and its elastic restoring force acting on the cone is greatly reduced or even disappears, and the radial support force of the cone on the slips is reduced, resulting in a significant reduction in the anchoring force (axial support force) of the slips on the casing. The bridge plug may slip relative to the casing, and eventually the rubber cylinder loses its seal. 2. The conventional bridge plug seal rubber cylinder is located above the slip. When it is subjected to high pressure from below, the rubber cylinder is compressed upward, which will shear the locking mechanism. In severe cases, it will cause locking failure and the bridge plug to be unsealed. Therefore, its ability to withstand downward pressure is much lower than its ability to withstand upward pressure, and it is not suitable for controlling wellbores with abnormally high pressure at the bottom. 3. The cut-off check valve or loose-leaf check valve of the ordinary bridge plug controls the high pressure at the lower layer. The simply installed sealing ring is easily eroded and damaged during the process of the check valve switching between the on and off states. Summary of the invention

[0003] In view of the defects of the above-mentioned prior art, the purpose of the utility model is to overcome the above-mentioned shortcomings and propose a wellbore switch tool that can withstand high pressure from below. Through the upper anchoring mechanism, the lower high pressure is used to help the sealing rubber tube to be compressed positively, and the anchoring mechanism is driven to support the anchoring casing to be strengthened. The sealing performance of the rubber tube and the anchoring function of the anchoring mechanism can be maintained for a long time. By forcibly resetting the towing side-opening sliding sleeve, the stroke controls the connection and disconnection of the lower high pressure and the upper part. When the gravity of the pipe column is used to control the connection between the upper and lower ends, it is only necessary to overcome the elastic force of the reset spring, and there is no worry about the pipe column being bent by pressure. In the scaling and corrosion environment, the on-off function is more reliable, and it can be widely used in the repeated communication and blocking control of the lower high pressure of the oil field wellbore.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] A wellbore opening and closing tool capable of bearing high pressure, comprising an anti-blocking setting module, a one-way locking module, a two-way anchoring module, a compression sealing module and a towing sliding sleeve module;

[0006] The anti-blocking setting module provides power support for preventing mechanical blocking of the tool when it is lowered into the well, driving the setting by internal pressure, and separating the pipe string from the bridge plug;

[0007] The one-way locking module provides one-way step-by-step automatic locking to maintain the compression, sealing and anchoring state for a long time after the tool is set and released;

[0008] The bidirectional anchoring module helps the tool to stay in the well and anchor it to the casing, and bear the axial force formed by the hydraulic pressure at both ends, its own gravity and the downward pressure load applied by the upper pipe string;

[0009] The compression seal module provides compression seal support for the tool and casing, and provides restoring elastic support for the one-way anchoring mechanism;

[0010] The towing sleeve module controls the communication or blocking of the lower high-pressure space and the upper low-pressure space in the form of a forced towing sleeve, thereby controlling the high-pressure fluid at the lower part of the tool.

[0011] Furthermore, the anti-blocking setting module includes an upper joint, an outer sleeve, a locking block, an outer piston, a starting pin, an inner piston, a push sleeve, a center tube, a dead plug and a release pin;

[0012] The dead plug thread is installed in the inner cavity at the bottom of the center tube, the upper end of the center tube is threadedly connected to the upper joint, the center tube is hung with the outer center tube as a whole through a release nail, the inner piston ring is sleeved outside the center tube, and is locked in the annular groove at the lower end of the upper joint by the locking block, the outer piston is hung outside the inner piston through a starting nail, the outer piston limits the radial expansion of the locking block, the push sleeve is processed with multiple radially evenly distributed milling grooves, the push sleeve is threadedly connected to the bottom of the inner piston, the bottom of the push sleeve is buckled with the outer groove at the upper end of the locking sleeve, the outer sleeve is threadedly connected to the upper joint, and is sleeved outside the push sleeve to limit the radial expansion of the push sleeve.

[0013] Further, the one-way locking module includes a locking sleeve, a fishing head, an unsealing block, an unsealing nail, a locking ring and a locking ring seat;

[0014] The lock ring seat is sleeved on the outer side of the upper end of the outer center tube and is axially limited by the unsealing block. The fishing head and the lock ring seat are hung by the unsealing nails and limit the radial expansion of the unsealing block. The lock ring is clamped on the outer side of the lock ring seat and meshes with the lock sleeve through one-way teeth, so that the lock sleeve and the lock ring can only undergo one-way displacement.

[0015] Furthermore, the bidirectional anchoring module includes an upper cone, a slip, a slip spring, a slip sleeve, a cap and a lower cone;

[0016] The upper cone is located at the upper part of the inner cavity of the slip sleeve and is limited in one direction by the step of the inner cavity of the slip sleeve. The slip is embedded in the inner cavity of the slip sleeve and is axially located between the upper cone and the lower cone. A slip spring is installed on the outer side of the slip so that the slip can be recovered or has a tendency to be recovered. The lower cone is limited at the lower part of the inner cavity of the slip sleeve by the cap, and the cap is threadedly connected to the slip sleeve.

[0017] Further, the compression sealing module includes an outer central tube, a stop cap, a rubber tube, a spacer ring, a rubber tube seat and a pressure cap;

[0018] The stop cap is sleeved on the outside of the rubber cylinder seat, the upper end of the rubber cylinder seat is threadedly connected to the lower cone, the rubber cylinder, the spacer ring and the pressure cap are sleeved on the outside of the rubber cylinder seat, the rubber cylinder seat ring is on the outside of the outer center tube, the pressure cap and the rubber cylinder seat are limited by steps, and the pressure cap cannot be pulled out from below the rubber cylinder seat.

[0019] Furthermore, the trailer sleeve module includes a connector, a switch body, a sleeve, a return spring, and a control plug;

[0020] The connector is threadedly connected to the pressure cap, the outer center tube and the switch body respectively. The inner cavity of the switch body accommodates the sliding sleeve and the reset spring. The top of the sliding sleeve abuts against the step of the connector, and the lower end of the sliding sleeve is supported by the reset spring. The middle part of the switch body is hollowed out to form a lateral liquid inlet groove, and a plurality of wide grooves are longitudinally milled on the upper part of the sliding sleeve so that the upper part of the sliding sleeve can be opened and closed under control. A plurality of lateral flow channels are opened at the lower part of the control insert, and a locking groove matching the top of the sliding sleeve is processed.

[0021] The utility model adopts the above technical solution and has the following beneficial effects:

[0022] 1. This tool adopts the upper design of anchoring mechanism. When it is subjected to high pressure from below, the high pressure can help the locking mechanism to produce a positive locking trend, without shear damage to the locking mechanism, and will not cause the locking mechanism to fail, so it has a stronger ability to withstand high pressure;

[0023] 2. The sealing rubber cylinder of this tool is designed to be placed downward, and the high pressure at the bottom is used to promote further positive compression of the sealing rubber cylinder. The sealing performance of the rubber cylinder can be maintained for a long time, so it is more suitable for well conditions with abnormally high pressure at the bottom;

[0024] 3. This tool uses a forced reset towing side-opening sleeve to control the lower high pressure. The side-opening sleeve has a lateral liquid inlet hole. The hydraulic pressure difference between the upper and lower casing spaces of the tool has almost no axial force on the sleeve. Therefore, the axial force required to control the opening and closing of the sleeve is smaller, and only the elastic force of the reset spring needs to be overcome. In addition, the control method of forced towing sleeve reset makes this tool basically unaffected by harsh environments such as scaling and corrosion.

[0025] 4. The seal of the sliding sleeve of the switch control element of this tool is solidified on the metal body by vulcanization, so that it has more reliable sealing performance and life under repeated dragging and high-speed hydraulic impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the assembly standby of the utility model.

[0027] Figure 2 It is a schematic diagram of the hands-free sealing of the utility model.

[0028] Figure 3It is a schematic diagram of the upper and lower pressure connections of the utility model.

[0029] Figure 4 It is a schematic diagram of catching and unsealing of the utility model. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Explanation of relevant terms:

[0032] 1. Setting: In oil fields, it generally refers to the process of the target tool changing from the normal state to the working state;

[0033] 2. Unsealing: In oil fields, it generally refers to the process of the target tool changing from a working state to a recoverable state or the recoverable state that the tool finally reaches;

[0034] 3. Pipe string: In oil fields, it generally refers to the sum of all pipes and tools lowered into the wellbore using oil pipes and other pipes as transmission media;

[0035] 4. Pressure: The common name for all fluid-related pressures in the oil field. They are not strictly mechanical pressures in physics, but pressure differences in physics, sometimes also called pressure differences.

[0036] like Figure 1 As shown, the assembly standby diagram consists of the following modules:

[0037] Anti-blocking setting module: It provides power support for preventing mechanical blocking of the tool during downhole operation, internal pressure-driven setting, and separation of the pipe string and the bridge plug. It includes an upper joint 1, an outer sleeve 2, a locking block 3, an outer piston 4, a starting pin 5, an inner piston 6, a push sleeve 7, a center pipe 8, a dead plug 28, and a release pin 12.

[0038] The dead plug 28 is threadedly installed in the inner cavity at the bottom of the center tube 8, and the upper end of the center tube 8 is threadedly connected to the upper joint 1. The center tube 8 is hung as a whole with the outer center tube 17 through the release nail 12. The inner piston 6 is sleeved on the outside of the center tube 8 and is locked in the annular groove at the lower end of the upper joint by the locking block 3. The outer piston 4 is hung on the outside of the inner piston 6 through the starting nail 5. The outer piston 4 limits the radial expansion of the locking block 3. A plurality of radially uniformly distributed milling grooves are processed on the push sleeve 7 and are threadedly connected to the bottom of the inner piston 6. The bottom of the push sleeve 7 is buckled with the outer groove at the upper end of the locking sleeve 9. The outer sleeve 2 is threadedly connected to the upper joint 1 and sleeved on the outside of the push sleeve 7 to limit the radial expansion of the push sleeve 7. This mechanical structure allows the tool to be started and sealed only under internal high pressure conditions, and a slight and simple mechanical jamming of the casing cannot cause the tool to be accidentally sealed during drilling.

[0039] One-way locking module: to maintain the compression, sealing and anchoring state for a long time after the tool is set and released, it provides one-way step-by-step automatic locking, which includes a locking sleeve 9, a fishing head 10, an unsealing block 11, an unsealing nail 13, a locking ring 14 and a locking ring seat 15;

[0040] The locking ring seat 15 is sleeved on the outer side of the upper end of the outer center tube 17 and is axially limited by the unsealing block 11. The fishing head 10 is connected to the outer locking ring seat 15 by the unsealing nail 13, and limits the radial expansion of the unsealing block 11 cut into two semicircles. The locking ring 14 is clamped on the outer side of the locking ring seat 15 and meshes with the locking sleeve 9 through one-way teeth, so that the locking sleeve 9 and the locking ring 14 can only undergo one-way displacement, thereby achieving the compression and anchoring state after the tool is set and released. Maintain locking.

[0041] Bidirectional anchoring module: helps the tool to stay in the well and anchor it to the casing, and bears the axial force formed by the hydraulic pressure at both ends, its own gravity and the downward pressure load applied by the upper pipe string. It includes an upper cone 16, a slip 18, a slip spring 19, a slip sleeve 20, a cap 21 and a lower cone 22;

[0042] The upper cone 16 is located at the upper part of the inner cavity of the slip sleeve 20 and is limited in one direction by the step of the inner cavity of the slip sleeve 20. The slip 18 is embedded in the inner cavity of the slip sleeve 20 and is axially located between the upper cone 16 and the lower cone 22. The slip spring 19 is installed on the outer side of the slip 18 so that the slip 18 can be recovered or has a tendency to be recovered. The lower cone 22 is limited at the lower part of the inner cavity of the slip sleeve 20 by the cap 21, and the cap 21 is threadedly connected to the slip sleeve 20. Due to the uniform distribution of the three phases of the circumference of the slip 18, according to the theory of three-point cocircularity in space, the circumferential distribution of the bidirectional slip 18 is more suitable for the lightweight structure and out-of-roundness of the casing.

[0043] Compression sealing module: provides compression sealing support for the tool and the casing, and provides restoring elastic support for the one-way anchoring mechanism, which includes an outer center tube 17, a stop cap 23, a rubber tube 24, a spacer ring 25, a rubber tube seat 26 and a pressure cap 27;

[0044] The stop cap 23 is sleeved on the outside of the rubber cylinder seat 26, the upper end of the rubber cylinder seat 26 is threadedly connected to the lower cone 22, the rubber cylinder 24, the spacer ring 25, and the pressure cap 27 are sleeved on the outside of the rubber cylinder seat 26, the rubber cylinder seat 26 is ringed on the outside of the outer center tube 17, and the pressure cap 27 and the rubber cylinder seat 26 are limited by steps, and the pressure cap 27 cannot be pulled out from the bottom of the rubber cylinder seat 26.

[0045] Towing sleeve module: It effectively controls the connection or blocking of the lower high-pressure space and the upper low-pressure space in the form of forced towing sleeve, so as to achieve the purpose of controlling the lower high-pressure fluid of the tool, and includes a connector 29, a switch body 30, a sleeve 31, a return spring 32 and a control plug 33;

[0046] The connector 29 is threadedly connected to the pressure cap 27, the outer center tube 17, and the switch body 30 respectively. The inner cavity of the switch body 30 accommodates a sleeve 31 and a reset spring 32. The top of the sleeve 31 abuts against the step of the connector 29, and the lower end is supported by the reset spring 32. The middle part of the switch body 30 is hollowed out to form a lateral liquid inlet groove, and a plurality of wide grooves are longitudinally milled on the upper part of the sleeve 31 so that the upper part of the sleeve 31 can be opened and closed under control. The seal on the sleeve 31 is integrally vulcanized rubber metal, which makes it have a longer service life under high-speed erosion conditions. A plurality of lateral flow passages are opened at the lower part of the control insert 33, and a locking groove matching the top of the sleeve 31 is processed.

[0047] like Figure 2 As shown, during the process of the tool being lowered into the well with the tubing string, the inner piston 6 is threadedly connected with the push sleeve 7 as a whole and is locked in the outer groove at the lower end of the upper joint 1 by the locking block 3, while the outer piston 4 limits the radial expansion of the locking block 3 and the groove, so that the push sleeve 7 will not produce a sealing displacement downward along the central pipe 8 under the action of non-hydraulic force. At the same time, the push sleeve 7 is connected with the locking sleeve 9 via hooks, and the outer sleeve 2 limits the radial expansion and unhooking of the lower end of the push sleeve 7, so that the locking sleeve 9 will not produce a sealing displacement downward along the central pipe 8 under the action of non-hydraulic force. The simple and slight mechanical obstruction of the casing cannot cause the accidental start-up and sealing of the tool; when the tool is lowered to the designed position, liquid is pumped into the tubing string, and the dead plug 28 at the bottom end of the central pipe 8 bears the internal pressure, the pumping pressure is increased, the starting nail 5 is sheared off, the outer piston 4 descends to the bottom dead center to release the locking block 3, and the outer piston 4. The inner piston 6 moves downward synchronously, and the locking sleeve 9 and the upper cone 16 are pushed downward in a related manner, so that the slip 18 expands radially and bites the casing to form an anchoring support, and the pressure continues to increase. The upper joint 1 drives the center tube 8, the outer center tube 17, the connector 29, and the pressure cap 27 to be lifted as a whole in sequence, so that the rubber cylinder 24 is compressed and close to the casing to form a seal; when the internal pressure of the tool is high enough, the release nail 12 is cut off, and the tool is sealed and released; when the internal pressure of the tool disappears, because the locking sleeve 9 and the locking ring 14 are engaged through the one-way teeth, only one-way displacement can occur, and the working state of the compression sealing module and the two-way anchoring module is maintained; the high-pressure fluid at the bottom of the tool is closed by the expanded rubber cylinder 24, the closed sliding sleeve 31, and the switch body 30 blocked by the lateral liquid inlet, so as to achieve the purpose of controlling the high pressure below the tool.

[0048] like Figure 3 As shown, when the fluid at the bottom of the tool needs to be mined, the special control plug 33 is installed at the bottom of the production pipe and goes down into the well. When the control plug 33 abuts against the sleeve 31 and continues to go down, the hook at the upper end of the sleeve 31 is retracted and buckled into the matching groove at the lower end of the control plug 33. The control plug 33 abuts against the sleeve 31 and continues to go down to the limiter in the inner cavity of the switch body 30 and stops. At this time, the side liquid inlet hole in the middle of the switch body 30 is aligned with the slotted hook at the upper part of the sleeve. The high-pressure fluid at the bottom of the tool is connected to the upper casing of the tool through the side liquid inlet hole on the switch body 30, the slotted hook at the upper part of the sleeve 31, and the inner cavity of the control plug 33, so that the high-pressure fluid at the bottom of the tool can be mined normally.

[0049] When it is necessary to seal the fluid at the bottom of the tool, the production pipe column is lifted to drive the control plug 33 upward, the slit hook claw at the upper end of the sliding sleeve 31 is stuck in the matching groove at the lower end of the control plug 33, and the outside is limited by the inner cavity of the switch body 30. The control plug 33 moves upward and forcibly drags the sliding sleeve 31 upward, and the lateral liquid inlet of the switch body is blocked by the lower half of the sliding sleeve 31. The high-pressure fluid at the bottom of the tool is sealed together by the expanded rubber cylinder 24, the closed sliding sleeve 31, and the switch body 30 with the lateral liquid inlet blocked, achieving The purpose of controlling the high pressure below the tool; when the sliding sleeve 31 is dragged to the top limit platform by the control plug 33, the inner groove matched with the switch body 30 here provides expansion space for the slotted hook claw on the upper part of the sliding sleeve 31, and the slotted hook claw on the upper part of the sliding sleeve 31 radially expands and escapes from the dragging groove below the control plug 33, and the control plug 33 is pulled out from the inner cavity of the sliding sleeve 31 and brought out along with the production pipe string. The sliding sleeve 31 will not be accidentally opened under the combined action of the friction force of the seal and the supporting force of the return spring 32;

[0050] Since the seal on the sliding sleeve 31 is integrally vulcanized from rubber and metal, its strength under dragging and fluid erosion is much higher than that of a freely mounted seal ring, so the sealing performance between the sliding sleeve 31 and the switch body 30 is more reliable and is not prone to accidental sealing.

[0051] like Figure 4 As shown, after the production pipe string and the control cannula 33 are brought out, under the condition that the upper casing is in good condition, a special salvage tool is lowered to capture the salvage head 10, the pipe string and the salvage tool are lifted up, and the unsealing nail 13 is cut off. The salvage head 10 moves upward and loses the radial constraint on the two semicircular unsealing blocks 11. The salvage head 10 sequentially drives the associated parts, such as the locking sleeve 9, the locking ring seat 15, the locking ring 14, the upper cone 16, the slip sleeve 20, the slip 18, the lower cone 22, the rubber cylinder 24, the spacer ring 25, and the rubber cylinder seat 26, to move upward and reset. The rubber cylinder 24 and the slip 18 are radially retracted and reset. The tool is completely unsealed, and the salvage pipe string is lifted up to fish out the tool as a whole.

[0052] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A wellbore opening and closing tool capable of withstanding high pressure, characterized in that: Including anti-blocking setting module, one-way locking module, two-way anchoring module, compression sealing module and trailer sliding sleeve module; The anti-blocking setting module provides power support for preventing mechanical blocking of the tool when it is lowered into the well, driving the setting by internal pressure, and separating the pipe string from the bridge plug; The one-way locking module provides one-way step-by-step automatic locking to maintain the compression, sealing and anchoring state for a long time after the tool is set and released; The bidirectional anchoring module helps the tool to stay in the well and anchor it to the casing, and bear the axial force formed by the hydraulic pressure at both ends, its own gravity and the downward pressure load applied by the upper pipe string; The compression seal module provides compression seal support for the tool and casing, and provides restoring elastic support for the one-way anchoring mechanism; The towing sleeve module controls the communication or blocking of the lower high-pressure space and the upper low-pressure space in the form of a forced towing sleeve, thereby controlling the high-pressure fluid at the lower part of the tool.

2. A wellbore switching tool capable of withstanding high pressure according to claim 1, characterized in that: The anti-blocking setting module comprises an upper joint (1), an outer sleeve (2), a locking block (3), an outer piston (4), a starting pin (5), an inner piston (6), a push sleeve (7), a center tube (8), a dead plug (28) and a release pin (12); The dead plug (28) is threadedly installed in the inner cavity at the bottom of the center tube (8). The upper end of the center tube (8) is threadedly connected to the upper joint (1). The center tube (8) is connected to the outer center tube (17) as a whole through a release nail (12). The inner piston (6) is sleeved outside the center tube (8) and is locked in the annular groove at the lower end of the upper joint (1) by the locking block (3). The outer piston (4) is hung outside the inner piston (6) through a starting nail (5). The outer piston (4) limits the radial expansion of the locking block (3). A plurality of radially uniformly distributed milling grooves are processed on the push sleeve (7). The push sleeve (7) is threadedly connected to the lower part of the inner piston (6). The lower part of the push sleeve (7) is buckled with the outer groove at the upper end of the locking sleeve (9). The outer sleeve (2) is threadedly connected to the upper joint (1) and sleeved outside the push sleeve (7) to limit the radial expansion of the push sleeve (7).

3. A wellbore switching tool capable of withstanding high pressure according to claim 2, characterized in that: The one-way locking module comprises a locking sleeve (9), a fishing head (10), an unsealing block (11), an unsealing nail (13), a locking ring (14) and a locking ring seat (15); The lock ring seat (15) is sleeved on the outer side of the upper end of the outer center tube (17) and is axially limited by the unsealing block (11). The fishing head (10) is connected to the lock ring seat (15) through the unsealing nail (13) and limits the radial expansion of the unsealing block (11). The lock ring (14) is clamped on the outer side of the lock ring seat (15) and meshes with the lock sleeve (9) through one-way teeth, so that the lock sleeve (9) and the lock ring (14) can only move in one direction.

4. A wellbore switching tool capable of withstanding high pressure according to claim 2, characterized in that: The bidirectional anchoring module comprises an upper cone (16), a slip (18), a slip spring (19), a slip sleeve (20), a cap (21) and a lower cone (22); The upper cone (16) is located at the upper part of the inner cavity of the slip sleeve (20) and is limited in one direction by the step of the inner cavity of the slip sleeve (20). The slip (18) is embedded in the inner cavity of the slip sleeve (20) and is axially located between the upper cone (16) and the lower cone (22). A slip spring (19) is installed on the outer side of the slip (18) so that the slip (18) can be recovered or has a tendency to be recovered. The lower cone (22) is limited at the lower part of the inner cavity of the slip sleeve (20) by a cap (21), and the cap (21) is threadedly connected to the slip sleeve (20).

5. A wellbore switching tool capable of withstanding high pressure according to claim 4, characterized in that: The compression sealing module comprises an outer central tube (17), a stop cap (23), a rubber tube (24), a spacer ring (25), a rubber tube seat (26) and a pressure cap (27); The stop cap (23) is sleeved on the outside of the rubber cartridge seat (26), the upper end of the rubber cartridge seat (26) is threadedly connected to the lower cone (22), the rubber cartridge (24), the spacer ring (25), the pressure cap (27) is sleeved on the outside of the rubber cartridge seat (26), the rubber cartridge seat (26) is ringed on the outside of the outer center tube (17), the pressure cap (27) and the rubber cartridge seat (26) are stepped and limited, and the pressure cap (27) cannot be pulled out from below the rubber cartridge seat (26).

6. A wellbore switching tool capable of withstanding high pressure according to claim 5, characterized in that: The towing sleeve module comprises a connector (29), a switch body (30), a sleeve (31), a return spring (32) and a control insert (33); The connector (29) is threadedly connected to the pressure cap (27), the outer center tube (17), and the switch body (30), respectively. The inner cavity of the switch body (30) accommodates the sliding sleeve (31) and the return spring (32). The top end of the sliding sleeve (31) abuts against the step of the connector (29). The lower end of the sliding sleeve (31) is supported by the return spring (32). The middle part of the switch body (30) is hollowed out to form a lateral liquid inlet groove. The upper part of the sliding sleeve (31) is longitudinally milled with a plurality of wide grooves so that the upper part of the sliding sleeve (31) can be controlled to open and close. The lower part of the control insert (33) is provided with a plurality of lateral flow passages and is provided with a locking groove matching the top end of the sliding sleeve (31).

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