A packer with multiple unsealing modes

Abstract

The present application relates to the technical field of oil and gas exploitation, and particularly relates to a packer with multiple unblocking modes, aiming to solve the problem of increased construction risk and construction cost caused by single unblocking mode. The present application comprises an inner cylinder assembly, an anchoring assembly and a sealing assembly sleeved on the inner cylinder assembly; the inner cylinder assembly comprises an upper joint, a first connecting sleeve, a center pipe and an inner sliding sleeve; the anchoring assembly comprises a slip, an upper cone and a lower cone, and the upper cone and the lower cone are arranged on the upper and lower sides of the slip respectively; the sealing assembly comprises a rubber cylinder, a back cap and a locking sleeve. The present application has the unblocking modes of lifting and pressing, and the unblocking modes work independently and do not affect each other. When one unblocking mode fails, the other unblocking mode can still work normally, greatly improving the reliability of unblocking and effectively reducing the construction risk and construction cost.

Description

Technical Field

[0001] This invention relates to the field of oil and gas extraction technology, and in particular to a packer with multiple unsealing methods. Background Technology

[0002] Packers are used for interlayer isolation during fracturing, acidizing, and other operations in oil and gas wells. After these operations, the ability to successfully release the packers is crucial for successful tubing pull-out. Currently used packers generally only have one release method, resulting in a simplistic release structure. If the packer fails to release during operation, well workover is necessary, increasing both risk and cost. Summary of the Invention

[0003] The purpose of this invention is to provide a packer with multiple unsealing methods to solve the problem of increased construction risks and costs caused by the inability to unseal with a single unsealing method.

[0004] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0005] A packer with multiple release methods includes an inner cylinder assembly and an anchoring assembly and a sealing assembly fitted within the inner cylinder assembly. The inner cylinder assembly includes an upper connector, a first connecting sleeve, a central tube, and an inner sliding sleeve. One end of the first connecting sleeve is fitted onto the upper connector and threadedly connected to it, while the other end is connected to the central tube. The end of the upper connector connected to the first connecting sleeve is configured as a split claw, with threads on the split claw. The inner sliding sleeve is inserted into the upper connector. The anchoring assembly includes a slip, an upper cone, and a lower cone, with the upper and lower cones respectively positioned on the upper and lower sides of the slip. The sealing assembly includes a rubber sleeve, a back cap, and a locking sleeve. The back cap is fitted within the central tube, and the locking sleeve is fitted within and connected to the back cap. The central tube... The back cap and locking sleeve form a starting space; a starting hole is opened on the central tube; during setting, the tubing is pressurized, and liquid enters the starting space through the starting hole and pushes the back cap and locking sleeve to move and squeeze the rubber sleeve for sealing. At the same time, the rubber sleeve pushes the lower cone to insert the lower cone into the slip for anchoring; during lifting to unseal, the tubing is lifted to separate the back cap and locking sleeve from the central tube and move downward under gravity to reset the rubber sleeve and slip; during pressurization to unseal, a ball is thrown, and the ball sits in the inner sliding sleeve. Under pressure, the ball pushes the inner sliding sleeve to disengage from the upper connector, and the split claw of the upper connector loses support. Lifting the tubing separates the upper connector from the first connecting sleeve and drives the upper cone to move, thereby resetting the slip and rubber sleeve.

[0006] Furthermore, the end of the first connecting sleeve connected to the upper connector is configured as a split claw, and the thread is set on the split claw; the thread of the first connecting sleeve and the upper connector is a reverse thread; when the reverse thread is released, the upper connector is rotated forward to disengage the upper connector from the first connecting sleeve, and then the upper connector is lifted up, which drives the upper cone to move, thereby resetting the slip and the rubber sleeve.

[0007] Furthermore, the inner cylinder assembly also includes a first shear pin, which is inserted into both the inner sliding sleeve and the upper connector. When pressure is applied to release the seal, the first shear pin is cut off.

[0008] Furthermore, the anchoring assembly also includes a pressure cap and a second connecting sleeve. The pressure cap is fitted onto the upper connector, and one end of the second connecting sleeve is fitted onto and connected to the pressure cap, while the other end is connected to the upper cone. During pressure release, the upper connector abuts against the pressure cap to move the pressure cap, the second connecting sleeve, and the upper cone upward.

[0009] Furthermore, the anchoring assembly also includes a support sleeve, one end of which is connected to the lower cone and the other end of which is connected to the rubber sleeve.

[0010] Furthermore, the sealing assembly also includes a release sleeve and a pressure cap. The release sleeve and pressure cap are fitted onto the central tube and inserted into the locking sleeve. The release sleeve is positioned between the back cap and the pressure cap. The release sleeve, central tube, locking sleeve, and pressure cap form a release space. During perforation release, the perforation tool is lowered to the set position and perforates the central tube, thereby connecting the central tube with the release space. Liquid enters the release space and dissolves the fasteners, causing the pressure cap, locking sleeve, and back cap to detach from the central tube and move downwards under gravity, thus resetting the rubber sleeve and slip.

[0011] Furthermore, the sealing assembly also includes a first C-ring and a second C-ring, which are disposed at both ends of the unsealing sleeve and snapped into the central tube.

[0012] Furthermore, the sealing assembly also includes a setting shear pin, which is inserted into both the back cap and the center tube.

[0013] Furthermore, the sealing assembly also includes a locking ring, which is fitted onto the release sleeve and inserted into the locking sleeve; both the locking ring and the locking sleeve are provided with barbed threads for connection, to prevent the locking sleeve from moving away from the rubber tube.

[0014] Furthermore, the sealing assembly also includes a release scissor and a scissor sleeve. The scissor sleeve is fitted into the release sleeve and inserted into the locking sleeve. The scissor sleeve is located at the end of the locking ring away from the rubber tube. The release scissor is inserted into both the scissor sleeve and the release sleeve. The release scissor and the scissor sleeve are made of a soluble material. When the perforation is released, liquid enters the release space and dissolves the release scissor and the scissor sleeve.

[0015] In summary, the technical effects achieved by this invention are as follows:

[0016] The packer with multiple unsealing methods provided by this invention includes an inner cylinder assembly and an anchoring assembly and a sealing assembly fitted within the inner cylinder assembly. The inner cylinder assembly includes an upper connector, a first connecting sleeve, a central tube, and an inner sliding sleeve. One end of the first connecting sleeve is fitted onto the upper connector and threadedly connected to it, while the other end is connected to the central tube. The end of the upper connector connected to the first connecting sleeve is configured as a split claw, with threads threaded onto the split claw. The inner sliding sleeve is inserted into the upper connector. The anchoring assembly includes a slip, an upper cone, and a lower cone, with the upper and lower cones respectively positioned on the upper and lower sides of the slip. The sealing assembly includes a rubber sleeve, a back cap, and a locking sleeve. The back cap is fitted within the central tube, and the locking sleeve is fitted within and connected to the back cap. The central tube, back cap, and locking sleeve form a starting space; a starting hole is provided on the central tube; during setting, the tubing is pressurized, and liquid enters the starting space through the starting hole, pushing the back cap and locking sleeve to move and squeeze the rubber sleeve for sealing. At the same time, the rubber sleeve pushes the lower cone to insert the slip for anchoring; during lifting to unseal, the tubing is lifted to detach the back cap and locking sleeve from the central tube and move downward under gravity to reset the rubber sleeve and slip; during pressurization to unseal, a ball is thrown, and the ball sits in the inner sliding sleeve. Under pressure, the inner sliding sleeve disengages from the upper connector, and the split claws of the upper connector lose support. Lifting the tubing causes the upper connector to disengage from the first connecting sleeve and drives the upper cone to move, thereby resetting the slip and rubber sleeve.

[0017] The packer provided by this invention achieves unsealing through at least two different methods, with different components involved in the unsealing process. This allows multiple unsealing methods to operate independently without interfering with each other. Even if one unsealing method fails, the other can still function normally, greatly improving the reliability of unsealing. Specifically, during upward unsealing, the lower cone and related components move downwards to achieve unsealing; during pressure unsealing, the upper cone and related components move upwards to achieve unsealing. This allows for independent unsealing and avoids the situation where failure of some components leads to the failure of all unsealing methods. Furthermore, the two unsealing methods can be used in combination to increase the success rate of unsealing. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a packer with multiple unsealing methods provided in an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the packer setting state with multiple unsealing methods provided for embodiments of the invention;

[0021] Figure 3 This is a schematic diagram of the upper connector;

[0022] Figure 4 for Figure 2 A magnified view of a section at point A in the middle;

[0023] Figure 5 This is a schematic diagram of a barbed thread structure.

[0024] Icons: 110-Upper connector; 120-First connecting sleeve; 130-Center tube; 140-Inner sliding sleeve; 150-First shear pin; 210-Clip; 220-Upper cone; 230-Lower cone; 240-Pressure cap; 250-Second connecting sleeve; 260-Support sleeve; 270-Clip cover; 280-Pressure ring; 290-Reset spring; 310-Glue tube; 320-Back cap; 330-Locking sleeve; 340-Unsealing sleeve; 350-Lower pressure cap; 360-First C-ring; 370-Second C-ring; 380-Setting shear pin; 390-Locking ring; 3110-Unsealing shear pin; 3120-Shear pin sleeve; a-Starting space; b-Starting hole; c-Unsealing space. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] Currently used packers generally only have one release method and a simple release structure. If the packer cannot be released during construction, well workover operations are required, which increases construction risks and costs.

[0029] In view of this, the present invention provides a packer with multiple unsealing methods, including an inner cylinder assembly and an anchoring assembly and a sealing assembly fitted within the inner cylinder assembly; the inner cylinder assembly includes an upper connector 110, a first connecting sleeve 120, a central tube 130, and an inner sliding sleeve 140; one end of the first connecting sleeve 120 is fitted onto the upper connector 110 and threadedly connected to the upper connector 110, and the other end is connected to the central tube 130; the end of the upper connector 110 connected to the first connecting sleeve 120 is configured as a split claw, and the thread is provided on the split claw; the inner sliding sleeve 140 is inserted into the upper connector 110; the anchoring assembly includes a slip 210, an upper cone 220, and a lower cone 230, the upper cone 220 and the lower cone 230 being respectively disposed on the upper and lower sides of the slip 210; the sealing assembly includes a rubber sleeve 310, a back cap 320, and a locking sleeve 330, the back cap 320 being fitted within the central tube 130, and the locking sleeve 330 being fitted within the back cap 320 and connected to the back cap 320. The central tube 130, back cap 320, and locking sleeve 330 form a starting space a; a starting hole b is provided on the central tube 130; during setting, the tubing is pressurized, and liquid enters the starting space a through the starting hole b, pushing the back cap 320 and locking sleeve 330 to move and squeeze the rubber sleeve 310 for sealing. At the same time, the rubber sleeve 310 pushes the lower cone 230 to insert the lower cone 230 into the slip 210 for anchoring; during lifting to unseal, the tubing is lifted so that the back cap 320... 1. The locking sleeve 330 disengages from the central tube 130 and moves downward under gravity, so that the rubber sleeve 310 and the slip 210 are reset. 2. When the seal is released by pressure, the ball is thrown and sits in the inner sliding sleeve 140. Under pressure, the ball pushes the inner sliding sleeve 140 away from the upper connector 110. The split claw of the upper connector 110 loses support, and the tube column is lifted to disengage the upper connector 110 from the first connecting sleeve 120 and drive the upper cone 220 to move, thereby resetting the slip 210 and the rubber sleeve 310.

[0030] The packer provided by this invention achieves unsealing through at least two different methods, with different components involved in the unsealing process. This allows multiple unsealing methods to operate independently without interfering with each other. Even if one unsealing method fails, the other can still function normally, greatly improving the reliability of unsealing. Specifically, lifting unsealing is achieved by the downward movement of the lower cone 230 and related components, while pressure unsealing is achieved by the upward movement of the upper cone 220 and related components. This enables independent unsealing and avoids the situation where the failure of some components leads to the failure of all unsealing methods. Furthermore, the two unsealing methods can be used in combination to increase the success rate of unsealing.

[0031] The following combination Figures 1-5 The structure and shape of the packer with multiple unsealing methods provided in this embodiment are described in detail below:

[0032] In this embodiment, the inner cylinder assembly further includes a first shear pin 150, which is simultaneously inserted into the inner sliding sleeve 140 and the upper connector 110, such as... Figure 1As shown; during the pressure release, the first shear pin 150 was cut off.

[0033] In this embodiment, the end of the first connecting sleeve 120 connected to the upper connector 110 is configured as a split claw, and threads are provided on the split claw. That is, the first connecting sleeve 120 and the upper connector 110 are connected by threads, and both threads are configured as split claws. The split claw is formed by cutting the sidewall along the axial direction, giving it deformability to achieve diameter expansion or contraction, such as... Figure 3 As shown. Further, the threads of the first connecting sleeve 120 and the upper connector 110 are reverse threads, that is, left-hand threads; when unsealing with reverse threads, the upper connector 110 is rotated forward to disengage the upper connector 110 from the first connecting sleeve 120, and then the upper connector 110 is lifted up, which drives the upper cone 220 to move, thereby resetting the slip 210 and the rubber sleeve 310.

[0034] In this embodiment, the anchoring assembly further includes a pressure cap 240, a second connecting sleeve 250, a support sleeve 260, a slip cover 270, a pressure ring 280, and a return spring 290. Figure 1 As shown, the pressure cap 240 is fitted onto the upper connector 110; one end of the second connecting sleeve 250 is fitted onto the pressure cap 240 and threadedly connected to it, while the other end is fitted onto the upper cone 220 and connected to it; one end of the support sleeve 260 is fitted onto the lower cone 230 and threadedly connected to it, while the other end abuts against the rubber sleeve 310. The slip cover 270 is fitted onto the central tube 130, and the slip 210 is installed on the slip cover 270. One end of the return spring 290 is connected to the slip 210, and the other end is linked to the slip cover 270, used to apply a thrust to the slip 210 to bring it closer to the central tube 130. The pressure ring 280 is fitted onto the upper cone 220 and inserted into the slip cover 270, with the pressure ring 280 threadedly connected to the slip cover 270.

[0035] In this embodiment, the sealing assembly further includes a release sleeve 340, a pressure cap 350, a first C-ring 360, a second C-ring 370, a setting shear pin 380, a locking ring 390, a release shear pin 3110, and a shear pin sleeve 3120. The pressure cap 350 and the back cap 320 are fitted onto the central tube 130 and inserted into the locking sleeve 330. The pressure cap 350 and the back cap 320 are respectively disposed at both ends of the locking sleeve 330 and threadedly connected to it. The release sleeve 340 is fitted onto the central tube 130 and inserted into the locking sleeve 330. The release sleeve 340 is positioned between the back cap 320 and the pressure cap 350 to divide the annular space formed by the locking sleeve 330 and the central tube 130 into an activation space a and a release space c. Specifically, the starting space a is formed by the back cap 320, the central tube 130, the unsealing sleeve 340 and the locking sleeve 330, and the unsealing space c is formed by the unsealing sleeve 340, the central tube 130, the locking sleeve 330 and the pressing cap 350.

[0036] The first C-ring 360 and the second C-ring 370 are disposed at both ends of the unsealing sleeve 340 and engaged with the central tube 130 to restrict the position of the unsealing sleeve 340, preventing relative displacement between the unsealing sleeve 340 and the central tube 130. The setting shear pin 380 is simultaneously inserted into the back cap 320 and the central tube 130. The locking ring 390 is fitted onto the unsealing sleeve 340 and inserted into the locking sleeve 330; both the locking ring 390 and the locking sleeve 330 are provided with barbed threads for connection, preventing the locking sleeve 330 from moving away from the rubber sleeve 310. Specifically, the locking sleeve 330 and the unlocking sleeve 340 form an annular groove, the locking ring 390 is engaged in the annular groove, the shear pin sleeve 3120 is fitted onto the unlocking sleeve 340 and inserted into the locking sleeve 330, and the shear pin sleeve 3120 is located at the end of the locking ring 390 away from the rubber tube 310; the unlocking shear pin 3110 is simultaneously inserted into the shear pin sleeve 3120 and the unlocking sleeve 340, thereby limiting the locking ring 390 by the unlocking sleeve 340, preventing the locking ring 390 from falling and disengaging from the annular groove formed by the locking sleeve 330 and the unlocking sleeve 340, as shown. Figure 4 As shown.

[0037] In this embodiment, the unsealing clip 3110 and clip sleeve 3120 are made of a soluble material, such as magnesium alloy. The barbed threads are as follows: Figure 5 As shown, the thread cross-section is a right-angled triangle, with the hypotenuse contacting to achieve screw-in. The right-angle side is horizontally positioned to prevent vertical movement. Simultaneously, the locking ring 390 is a C-shaped ring. When the locking sleeve 330 moves downwards, it is supported by the right-angle side and cannot move further. When the locking sleeve 330 moves upwards, the hypotenuse contact applies a radial force to the locking ring 390, squeezing it and reducing its diameter. This disengages the threaded connection between the locking ring 390 and the locking sleeve 330, allowing the locking sleeve 330 to move upwards. The barbed thread enables a unidirectional connection.

[0038] This embodiment provides a packer with multiple unsealing methods, offering four unsealing methods, each independent and non-interfering with the others. This effectively improves the tool's unsealing success rate and avoids the need for well workover operations when the packer cannot be unsealed. The four unsealing methods are pull-up unsealing, pressure unsealing, reverse-clamp unsealing, and perforation unsealing. The specific working process is as follows:

[0039] During setting, pressure is applied to the tubing string. The pressure enters the starting space a through the starting port b and acts on the back cap 320, pushing it to shear the setting shear pin 380 and move upwards. During this movement, the back cap 320 squeezes the rubber sleeve 310, which in turn pushes the support sleeve 260 and the lower cone 230 to squeeze the slips 210, causing the slips 210 to engage with the inner wall of the wellbore, thus achieving setting. At this time, the diameter of the rubber sleeve 310 increases, forming a tight seal with the inner wall of the wellbore, and the slips 210 engage with the inner wall of the wellbore, as shown below. Figure 2As shown. During the setting process, the back cap 320 simultaneously drives the locking sleeve 330 upward. At this time, the locking sleeve 330 and the locking ring 390 move relative to each other. Simultaneously, the locking ring 390 limits the locking sleeve 330 to prevent it from moving away from the rubber tube 310, thus preventing the rubber tube 310 and the slip 210 from returning to their initial state. In addition, during the upward movement of the rubber tube 310, after pushing the lower cone 230, the slip 210 and the upper cone 220 upward, the upper cone 220 abuts against the first connecting sleeve 120 to ensure that the upper cone 220 and the lower cone 230 compress the slip 210.

[0040] During the unsealing process, the tubing string is lifted, causing the inner cylinder assembly to move upward to cut the unsealing shear pin 3110. After the unsealing shear pin 3110 is cut, the shear pin sleeve 3120, the locking ring 390 disengage from the unsealing sleeve 340. Without the support of the unsealing sleeve 340, the locking ring 390 can no longer limit the locking sleeve 330. Under the action of gravity, the shear pin sleeve 3120, the locking ring 390, the locking sleeve 330, the back cap 320, and the lower pressure cap 350 move downward. The lower end of the rubber sleeve 310 loses its support, causing the rubber sleeve 310 to retract and fall under its own elasticity. As the rubber sleeve 310 falls, the lower cone 230 loses its support and falls, causing the slip 210 to move away from the inner wall of the wellbore under the action of the return spring 290, ultimately achieving unsealing.

[0041] During the pressure release process, a ball is thrown, which sits in the inner sliding sleeve 140. Pressure causes the ball to push the inner sliding sleeve 140 under pressure and shear the first shear pin 150, thus causing the inner sliding sleeve 140 to descend and disengage from the upper connector 110. At this time, the split claws of the upper connector 110 are in a free state due to the loss of support from the inner sliding sleeve 140. Lifting the tubing string causes the upper connector 110 to disengage from the first connecting sleeve 120 and abut against the pressure cap 240. Subsequently, the pressure cap 240 drives the second connecting sleeve 250 and the upper cone 220 to move upward. At this time, under the elastic action of the return spring 290 and the rubber sleeve 310 itself, the slip 210 moves away from the inner wall of the wellbore, and the rubber sleeve 310 retracts, thus completing the release. It should be noted that during the release process, the retraction of the rubber sleeve 310 will push the lower cone 230, causing the lower cone 230 to move upward and pushing the slip 210 and slip cover 270 upward.

[0042] When unsealing, rotate the upper connector 110 forward to disengage the threaded connection between the upper connector 110 and the first connecting sleeve 120. Then, lift the upper connector 110 so that it abuts against the pressure cap 240 and drives the second connecting sleeve 250 and the upper cone 220 to move upward. At this time, under the elastic action of the return spring 290 and the rubber sleeve 310 itself, the slip 210 moves away from the inner wall of the well barrel, and the rubber sleeve 310 retracts, thus completing the unsealing.

[0043] During the perforation and unsealing process, the perforation tool is lowered to the designated position and perforates the central tube 130. An annular groove can be provided on the inner wall of the central tube 130 for positioning and locking the perforation tool. After perforation, the central tube 130 connects with the unsealing space c. Liquid enters the unsealing space c and dissolves the unsealing shear pin 3110 and shear pin sleeve 3120. After the unsealing shear pin 3110 and shear pin sleeve 3120 dissolve, the locking ring 390 loses its support. Consequently, under the action of gravity, the locking ring 390, locking sleeve 330, back cap 320, and pressure cap 350 move downwards, and the lower end of the rubber sleeve 310 loses its support, thereby resetting the rubber sleeve 310 and the slip 210.

[0044] The packer with multiple unsealing methods provided in this embodiment has four different unsealing methods. Through structural design, each unsealing method is independent of the others, does not affect each other, and can be used in combination, which significantly improves the unsealing success rate of the packer, increases safety redundancy, and effectively reduces construction risks and construction costs.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A packer with multiple unsealing methods, characterized in that, Includes an inner cylinder assembly and an anchoring assembly and a sealing assembly fitted onto the inner cylinder assembly; The inner cylinder assembly includes an upper connector (110), a first connecting sleeve (120), a central tube (130), and an inner sliding sleeve (140). One end of the first connecting sleeve (120) is fitted onto the upper connector (110) and threadedly connected to the upper connector (110), and the other end is connected to the central tube (130); the end of the upper connector (110) connected to the first connecting sleeve (120) is configured as a split claw, and the thread is set on the split claw; the inner sliding sleeve (140) is inserted into the upper connector (110). The anchoring assembly includes a slip (210), an upper cone (220), and a lower cone (230), with the upper cone (220) and the lower cone (230) respectively disposed on the upper and lower sides of the slip (210); the sealing assembly includes a rubber sleeve (310), a back cap (320), and a locking sleeve (330), with the back cap (320) fitted onto the central tube (130), and the locking sleeve (330) fitted onto and connected to the back cap (320); the central tube (130), the back cap (320), and the locking sleeve (330) together form an activation space (a); the central tube (130) has an activation hole (b); During setting, the tubing is pressurized, and the liquid enters the starting space (a) through the starting hole (b) and pushes the back cap (320) and the locking sleeve (330) to move to squeeze the rubber sleeve (310) for sealing. At the same time, the rubber sleeve (310) pushes the lower cone (230) so that the lower cone (230) is inserted into the slip (210) for anchoring. When the seal is lifted, the lifting of the tube column causes the back cap (320), the locking sleeve (330) to separate from the central tube (130) and move downward under the action of gravity, so that the rubber sleeve (310) and the slip (210) are reset; When the pressure is applied to release the seal, the ball is thrown and sits in the inner sliding sleeve (140). Under pressure, the ball pushes the inner sliding sleeve (140) away from the upper connector (110). The split claw of the upper connector (110) loses support, and the tube column is lifted to disengage the upper connector (110) from the first connecting sleeve (120) and drive the upper cone (220) to move, thereby resetting the slip (210) and the rubber sleeve (310). The sealing assembly further includes a release sleeve (340) and a pressure cap (350), the release sleeve (340) and the pressure cap (350) being fitted onto the central tube (130) and inserted into the locking sleeve (330), the release sleeve (340) being disposed between the back cap (320) and the pressure cap (350); The unsealing sleeve (340), the central tube (130), the locking sleeve (330), and the pressure cap (350) form an unsealing space (c); When the perforation is released, the perforation tool is lowered to the set position and perforates the central tube (130), thereby connecting the central tube (130) with the release space (c). Liquid enters the release space (c) and dissolves the fastener, thereby causing the pressure cap (350), the locking sleeve (330) and the back cap (320) to detach from the central tube (130) and move downward under the action of gravity, thereby realizing the reset of the rubber sleeve (310) and the slip (210).

2. The packer with multiple unsealing methods according to claim 1, characterized in that, The end of the first connecting sleeve (120) connected to the upper connector (110) is configured as a split claw, and the thread is provided on the split claw; the thread of the first connecting sleeve (120) and the upper connector (110) is a reverse thread; When unsealing by reverse buckling, rotate the upper connector (110) to disengage it from the first connecting sleeve (120), and then lift the upper connector (110). The upper connector (110) drives the upper cone (220) to move, thereby resetting the slip (210) and the rubber sleeve (310).

3. The packer with multiple unsealing methods according to claim 1, characterized in that, The inner cylinder assembly also includes a first shear pin (150), which is inserted into both the inner sliding sleeve (140) and the upper connector (110). When pressure is applied to release the seal, the first shear pin (150) is cut off.

4. The packer with multiple unsealing methods according to claim 1, characterized in that, The anchoring assembly further includes a pressure cap (240) and a second connecting sleeve (250). The pressure cap (240) is fitted onto the upper connector (110). One end of the second connecting sleeve (250) is fitted onto the pressure cap (240) and connected to the pressure cap (240), and the other end is connected to the upper cone (220). When the pressure is applied to release the seal, the upper connector (110) abuts against the pressure cap (240) to drive the pressure cap (240), the second connecting sleeve (250) and the upper cone (220) to move upward.

5. The packer with multiple unsealing methods according to claim 4, characterized in that, The anchoring assembly also includes a support sleeve (260), one end of which is connected to the lower cone (230) and the other end of which is connected to the rubber sleeve (310).

6. The packer with multiple unsealing methods according to claim 1, characterized in that, The sealing assembly further includes a first C-ring (360) and a second C-ring (370), which are disposed at both ends of the unsealing sleeve (340) and snapped into the central tube (130).

7. The packer with multiple unsealing methods according to claim 6, characterized in that, The sealing assembly also includes a setting shear pin (380), which is inserted into both the back cap (320) and the center tube (130).

8. The packer with multiple unsealing methods according to claim 7, characterized in that, The sealing assembly also includes a locking ring (390), which is fitted onto the unsealing sleeve (340) and inserted into the locking sleeve (330); both the locking ring (390) and the locking sleeve (330) are provided with barbed threads for connection, which are used to prevent the locking sleeve (330) from moving away from the rubber sleeve (310).

9. The packer with multiple unsealing methods according to claim 8, characterized in that, The sealing assembly further includes a release scissor (3110) and a scissor sleeve (3120), the scissor sleeve (3120) being fitted onto the release sleeve (340) and inserted into the locking sleeve (330), the scissor sleeve (3120) being located at the end of the locking ring (390) away from the rubber tube (310); The unsealing clipper (3110) is simultaneously inserted into the clipper sleeve (3120) and the unsealing sleeve (340), and the unsealing clipper (3110) and the clipper sleeve (3120) are made of a soluble material; When the perforation is unsealed, liquid enters the unsealing space (c) and dissolves the unsealing pin (3110) and the pin sleeve (3120).

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