Y211 type hydraulic power-assisted fracturing packer

Abstract

The invention relates to the technical field of oil field downhole tools, in particular to a Y211 type hydraulic power-assisted fracturing packer which comprises an upper connector, an upper center pipe, a lower center pipe and a lower connector which are fixedly connected in sequence, a liquid inlet hole is formed in the position, close to the upper connector, of the upper center pipe, a packing assembly is arranged on the upper center pipe, and a liquid outlet hole is formed in the lower center pipe. A fracturing driving part abuts against one end of the packing assembly, a cone cap abuts against the other end of the packing assembly, a cavity is formed in the fracturing driving part, one end of the cavity is communicated with the liquid inlet hole, an anchoring assembly and a centralizing assembly are arranged on the lower center pipe, one end of the anchoring assembly is in transmission connection with an anchoring driving part, and the other end of the anchoring assembly is in transmission connection with the centralizing assembly. A top sleeve is fixedly arranged at one end of the centralizing assembly, a long track groove and a short track groove are formed in the position, close to the lower connector, of the lower center pipe, and a track pin freely moving in the long track groove and the short track groove is arranged at the end, away from the top sleeve, of the centralizing assembly.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield downhole tools, and in particular to a Y211 hydraulically assisted fracturing packer. Background Art

[0002] In the oil field fracturing process, oil field fracturing is to squeeze high-pressure, large-volume, and viscous liquid into the oil layer to form cracks in the oil layer. Usually, a packer is used for layered fracturing. The fracturing pressure is usually relatively high, and can reach 100MPa when the pressure is high. Therefore, the requirements for the matching packer are relatively high, and it can withstand the high pressure during fracturing without leakage and deformation.

[0003] The existing self-locking 211 packer CN210289701U published by the State Intellectual Property Office is set and squeezed in the form of lifting and lowering during oil production to complete casing isolation.

[0004] The existing Y211 packer is known to have the following problems: 1. The existing Y211 packer adopts the method of lifting and lowering to set the seal. The height of the lifting string has a limited extrusion force on the rubber tube. When the lifting height reaches the limit, the sealing performance of the rubber tube will not be improved even if the rubber tube is squeezed by lifting and lowering. 2. After the seal is set, it cannot be set again. The sealing effect of the rubber cylinder depends entirely on experience, which makes it difficult to use; 3. When setting the seal, if the pipe string is lifted too high, the pipe string is severely bent, and the seal is not set in place, it will directly affect the sealing effect of the rubber sleeve, and cause irreversible damage to the casing during high-pressure fracturing. Summary of the invention

[0005] In view of this, the purpose of the present invention is to propose a Y211 type hydraulically assisted fracturing packer to solve the problems raised in the above background technology.

[0006] Based on the above purpose, the present invention provides a Y211 type hydraulically assisted fracturing packer, comprising an upper joint, an upper center pipe, a lower center pipe and a lower joint fixedly connected in sequence, wherein a liquid inlet hole is provided at a location of the upper center pipe near the upper joint, a packing assembly is mounted on the upper center pipe, one end of the packing assembly is abutted against a fracturing driving member, and the other end is abutted against a cone cap, one end of the fracturing driving member is abutted against the upper joint, a cavity is provided inside the fracturing driving member, one end of the cavity is communicated with the liquid inlet hole, an anchoring assembly and a straightening assembly are mounted on the lower center pipe, and the anchoring assembly One end of the component is arranged inside the cone cap, and the other end is transmission-connected with an anchor driving component. A top sleeve is fixedly provided at one end of the straightening component, and one end of the top sleeve extends to the inside of the anchor driving component. A long track groove and a short track groove are provided at a place of the lower center tube near the lower joint. The long track groove and the short track groove are arranged alternately, and the bottoms of the long track groove and the short track groove are connected to each other. A track pin that can move freely in the long track groove and the short track groove is provided at one end of the straightening component away from the top sleeve, and the switching of the track pin between the long track groove and the short track groove is completed by lifting and lowering the center tube.

[0007] Preferably, the fracturing driving component comprises: A first retaining ring, sleeved on the upper central tube, one end of the first retaining ring extending outwardly to be provided with a push ring, the push ring abutting against the packing assembly; An adjusting ring, one end of which is sleeved on the upper joint and abutted against each other, and the other end of which is sleeved on the first retaining ring, and a cavity is formed between the adjusting ring, the first retaining ring and the upper joint; At least one locking block is inserted into the first retaining ring, one end of the locking block is inserted into the upper center tube, and the other end is arranged close to the cavity.

[0008] Preferably, at least one first rubber ring is provided between the upper joint and the adjusting ring, at least one second rubber ring is provided between the adjusting ring and the first retaining ring, and at least one third rubber ring is provided between the first retaining ring and the upper center tube.

[0009] Preferably, the sealing assembly comprises a plurality of rubber cylinders sleeved on the upper center tube, and a spacer ring is provided between each of the rubber cylinders.

[0010] Preferably, an O-ring is provided for sealing between the upper center tube and the lower center tube.

[0011] Preferably, the anchoring assembly comprises: A second retaining ring is arranged inside the cone cap, and the second retaining ring is sleeved on the upper center tube; A cone, the cone portion of which is sleeved on the lower center tube, and the other end is inserted between the cone cap and the second retaining ring, the cone is fixedly connected to the cone cap, and at least one anti-loosening pin is fixedly arranged on the inner wall of the cone and the cone cap, the anti-loosening pin on the cone cap passes through the upper center tube and is inserted on the lower center tube, and the anti-loosening pin on the cone passes through the second retaining ring and is inserted on the upper center tube; A connecting sleeve, which is sleeved on the lower center tube, one end of which is inserted into the cone and the other end of which is against the lower center tube; The cava holder is sleeved on the connecting sleeve, one end of the cava holder is against the connecting sleeve, and the other end is slidably connected with a cava, and the free end of the cava is fitted on the conical surface of the cone.

[0012] Preferably, the anchoring drive comprises: A ball lock sleeve is sleeved on the lower center tube, one end of the ball lock sleeve is arranged between the connecting sleeve and the cavatole, and the other end is provided with a plurality of through holes, each of the through holes is provided with a steel ball, and each of the steel balls is clamped on the lower center tube; A ball blocking sleeve is sleeved on the ball locking sleeve, and the middle part of the ball blocking sleeve abuts against the ball locking sleeve; A spring is sleeved on the ball locking sleeve, and two ends of the spring are respectively pressed against the cava holder and the ball blocking sleeve; The sheath has one end sleeved on the cava holder and fixedly connected thereto, and the other end sleeved on the top sleeve, and an annular groove for releasing the steel ball is provided on the inner wall of the top sleeve.

[0013] Preferably, the straightening assembly comprises: A centralizing body, sleeved on the lower center tube, a plurality of grooves are arranged on the outer wall of the centralizing body, a friction block is arranged inside each of the grooves, a plurality of compression springs are arranged inside each of the friction blocks, each of the compression springs passes through the friction block and abuts against the bottom of the groove, the top sleeve is sleeved on one end of the centralizing body, one end of the top sleeve extends out of the groove and abuts against one end of all the friction blocks; A pressure ring is sleeved on an end of the centralizing body away from the top sleeve and fixedly connected, and one end of the pressure ring extends out of the groove to abut against all the friction rings; A swivel is arranged between the pressure ring and the lower center tube, and the track pin is passed through the swivel; The third retaining ring has one end sleeved on the pressure ring and fixedly connected thereto, and the other end sleeved on the lower center tube.

[0014] Beneficial effects of the present invention: 1. The requirement for the height of the packer during setting is reduced, and the packer can be set. The pressure during fracturing is sufficient to compress the rubber cartridge to the use state, thereby improving the stability of the tool; 2. Reduce the difficulty of using the tool. The height of the seal can be appropriately reduced during setting. With the existence of the fracturing drive, the hydraulic setting device cleverly converts the fracturing pressure into the squeezing force on the rubber cylinder. The higher the fracturing pressure, the higher the squeezing force on the rubber cylinder, and the better the sealing effect of the rubber cylinder. 3. The sealing effect of the rubber cartridge is better, which can effectively protect the casing during high-pressure fracturing and prevent irreversible damage to the casing caused by high pressure; 4. By optimizing the height of the pipe, the bending of the pipe string can be effectively reduced and the service life of the pipe string can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the upper structure of the overall structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of the middle structure of the overall structure of an embodiment of the present invention; Figure 4 It is a schematic diagram of the lower structure of the overall structure of an embodiment of the present invention.

[0017] The markings in the figure are: 1. Upper joint; 2. Adjusting ring; 3. Upper center tube; 4. First retaining ring; 5. Rubber cylinder; 6. Spacer ring; 7. O-ring; 8. Anti-loosening pin; 9. Cone cap; 10. Second retaining ring; 11. Lower center tube; 12. Cone; 13. Cava; 14. Connecting sleeve; 15. Cava support; 16. Locking ball sleeve; 17. Spring; 18. Sheath; 19. Retaining ball sleeve; 20. Steel ball; 21. Top sleeve; 22. Straightening body; 23. Friction block; 24. Compression spring; 25. Compression ring; 26. Swivel; 27. Track pin; 28. Third retaining ring; 29. ​​Lower joint; 30. First rubber ring; 31. Second rubber ring; 32. Third rubber ring; 33. Locking block. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figures 1 to 4 As shown, a Y211 type hydraulically assisted fracturing packer comprises an upper joint 1, an upper central pipe 3, a lower central pipe 11 and a lower joint 29 which are fixedly connected in sequence, wherein a liquid inlet hole is provided at a location of the upper central pipe 3 near the upper joint 1, a packing assembly is mounted on the upper central pipe 3, a fracturing driving member is abutted at one end of the packing assembly, and a cone cap 9 is abutted at the other end, one end of the fracturing driving member abuts against the upper joint 1, a cavity is provided inside the fracturing driving member, one end of the cavity is communicated with the liquid inlet hole, an anchoring assembly and a straightening assembly are mounted on the lower central pipe 11, and one end of the anchoring assembly is arranged at Inside the cone cap 9, the other end is transmission-connected with an anchoring drive member, one end of the straightening assembly is fixedly provided with a top sleeve 21, one end of the top sleeve 21 extends to the inside of the anchoring drive member, and a long track groove and a short track groove are provided at a location of the lower center tube 11 near the lower joint 29, the long track groove and the short track groove are arranged alternately, and the bottoms of the long track groove and the short track groove are connected to each other, and the end of the straightening assembly away from the top sleeve 21 is provided with a track pin 27 that can move freely in the long track groove and the short track groove, and the switching of the track pin 27 between the long track groove and the short track groove is completed by lifting the lower center tube 11.

[0021] For example, the sealing action: during the lowering process and when the tool is lowered into place, the track pin 27 is always in the short track groove of the lower center pipe 11. At this time, the pipe string is lifted, and the upper joint 1 drives the upper center pipe 3 and the lower center pipe 11 to move upward. The straightening assembly is tightened on the casing wall and relatively motionless. The top sleeve 21 and the track pin 27 connected thereto are also fixed. The lifting is continued, and the track pin 27 is switched from the short track groove to the long track groove on the lower center pipe 11. After the switching is completed, it is lowered. Similarly, the top sleeve 21 is relatively fixed under the action of the straightening assembly. During lowering, the top sleeve 21 overcomes the anchoring drive and moves upward. When the anchoring drive falls into the top sleeve 21, the anchoring assembly is released at this time, and it is continued to be lowered. The top sleeve 21 pushes the anchoring assembly upward and outward, and is anchored on the casing wall and does not move. The lowering is continued, and the anchoring assembly starts to squeeze the sealing assembly upward. The lowering is continued, and the gravity of the lowered pipe string is converted into an extrusion force for squeezing the sealing assembly, so that the sealing assembly completes the sealing. During fracturing, pressure is injected from the oil pipe. There is a liquid inlet hole at the upper end of the upper center pipe 3. Since the upper joint 1 is connected and fixed to the upper center pipe 3, when pressure enters from the liquid inlet hole of the upper center pipe 3, it pushes the fracturing drive member downward and starts to squeeze the packing assembly. The higher the pressure injected into the oil pipe during fracturing, the greater the force applied by the hydraulic mechanism to the packing assembly, so that the packing is more thorough and the sealing is better. Unsealing action: there is no pressure in the oil pipe, and the hydraulic mechanism does not produce squeezing pressure on the sealing assembly. The pipe column is lifted, and the top sleeve 21 and the track pin 27 are relatively fixed on the casing wall under the action of the straightening assembly. When lifting, the upper joint 1 drives the upper center pipe 3 and the lower center pipe 11 upward, and the track pin 27 switches from the long track groove of the lower center pipe 11 to the short track groove. When lifting, the lower center pipe 11 drives the anchoring drive member upward and separates from the top sleeve 21. The anchoring assembly and the sealing assembly are both in an outward expanded state. When lifting, the sealing assembly and the anchoring assembly move downward depending on the friction force of the casing, and the anchoring assembly and the sealing assembly return to their initial state.

[0022] As an optional embodiment, the fracturing driving component includes: A first retaining ring 4 is sleeved on the upper central pipe 3, one end of the first retaining ring 4 is extended outwardly to be provided with a push ring, and the push ring abuts against the packing assembly; An adjusting ring 2, one end of which is sleeved on the upper joint 1 and abutted against each other, and the other end of which is sleeved on the first retaining ring 4, so that a cavity is formed between the adjusting ring 2, the first retaining ring 4 and the upper joint 1; At least one locking block 33 is inserted into the first retaining ring 4 , one end of the locking block 33 is inserted into the upper central tube 3 , and the other end is disposed close to the cavity.

[0023] As an optional embodiment, at least one first rubber ring 30 is provided between the upper joint 1 and the adjusting ring 2, at least one second rubber ring 31 is provided between the adjusting ring 2 and the first retaining ring 4, and at least one third rubber ring 32 is provided between the first retaining ring 4 and the upper center tube 3.

[0024] As an optional embodiment, the sealing assembly includes a plurality of rubber tubes 5 sleeved on the upper central tube 3 , and a spacer ring 6 is provided between each of the rubber tubes 5 .

[0025] As an optional embodiment, an O-ring 7 is provided between the upper center tube 3 and the lower center tube 11 for sealing.

[0026] For example, during fracturing, pressure is injected from the oil pipe. There is a liquid inlet hole at the upper end of the upper center pipe 3. Since the upper joint 1 is connected to the upper center pipe 3 and is fixed, when pressure enters from the liquid inlet hole of the upper center pipe 3, it pushes the adjusting ring 2 downward, the locking block 33 is released and falls into the cavity, the first baffle ring 4 is released, and the pressure pushes the adjusting ring 2 to continue downward, pushing the first baffle ring 4 downward to start squeezing the rubber cylinder 5. The higher the pressure injected into the oil pipe during fracturing, the greater the force applied to the rubber cylinder 5 by the hydraulic mechanism, the more thoroughly the rubber cylinder 5 is sealed, and the better the sealing performance.

[0027] As an optional embodiment, the anchoring assembly includes: A second retaining ring 10 is arranged inside the cone cap 9, and the second retaining ring 10 is sleeved on the upper center tube 3; A cone 12, the cone portion of which is sleeved on the lower center tube 11, and the other end is inserted between the cone cap 9 and the second retaining ring 10, the cone 12 is fixedly connected to the cone cap 9, and at least one loosening pin is fixedly arranged on the inner wall of the cone 12 and the cone cap 9, the loosening pin on the cone cap 9 passes through the upper center tube 3 and is inserted on the lower center tube 11, and the loosening pin on the cone 12 passes through the second retaining ring 10 and is inserted on the upper center tube 3; A connecting sleeve 14 is sleeved on the lower central tube 11, one end of the connecting sleeve 14 is inserted into the cone 12, and the other end is against the lower central tube 11; The cava support 15 is sleeved on the connecting sleeve 14 , one end of the cava support 15 abuts against the connecting sleeve 14 , and the other end is slidably connected with a cava 13 , and the free end of the cava 13 is fitted on the conical surface of the cone 12 .

[0028] As an optional embodiment, the anchoring driver comprises: A ball lock sleeve 16 is sleeved on the lower center tube 11, one end of the ball lock sleeve 16 is arranged between the connecting sleeve 14 and the cavatole 15, and the other end is provided with a plurality of through holes, each of which is provided with a steel ball 20, and each of the steel balls 20 is clamped on the lower center tube 11; A ball blocking sleeve 19 is sleeved on the ball locking sleeve 16, and the middle part of the ball blocking sleeve 19 abuts against the ball locking sleeve 16; A spring 17 is sleeved on the ball locking sleeve 16, and two ends of the spring 17 are respectively pressed against the cavatole 15 and the ball blocking sleeve 19; One end of the sheath 18 is sleeved on the cava holder 15 and fixedly connected, and the other end is sleeved on the top sleeve 21 , and an annular groove for releasing the steel ball 20 is provided on the inner wall of the top sleeve 21 .

[0029] For example, the track pin 27 switches from the short track groove to the long track groove on the lower center tube 11. When the switching is completed and lowered, the top sleeve 21 is relatively fixed under the action of the straightening assembly. When lowered, the top sleeve 21 overcomes the force of the spring 17 and pushes the ball-blocking sleeve 19 to move upward. When the steel ball 20 falls into the top sleeve 21, the ball-locking sleeve 16 and the connected cava holder 15 are released, and the top sleeve 21 continues to be lowered. The sleeve 18, the cava holder 15 and the cava 13 are pushed upward in turn. 13 moves upward along the cone 12 and expands outward, anchored on the casing wall and does not move, and continues to be lowered. The slip 13 pushes the cone 12, the second baffle ring 10, and the cone cap 9 upward in sequence. Since the first baffle ring 4 is fixed on the upper center pipe 3 by the locking block 33, when lowering, the slip 13 drives the cone 12, the second baffle ring 10, and the cone cap 9 to move upward and begin to squeeze the three rubber tubes 5 and the spacer ring 6. Continue to lower, and the gravity of the lowered pipe string is converted into an extrusion force for squeezing the rubber tube 5, so that the rubber tube 5 expands to complete the sealing.

[0030] As an optional embodiment, the straightening assembly includes: The centralizing body 22 is sleeved on the lower center tube 11. A plurality of grooves are provided on the outer wall of the centralizing body 22. A friction block 23 is provided inside each of the grooves. A plurality of compression springs 24 are provided inside each of the friction blocks 23. Each of the compression springs 24 passes through the friction block 23 and abuts against the bottom of the groove. The top sleeve 21 is sleeved on one end of the centralizing body 22. One end of the top sleeve 21 extends out of the groove and abuts against one end of all the friction blocks 23. A pressure ring 25 is sleeved on one end of the centralizing body 22 away from the top sleeve 21 and fixedly connected thereto, one end of the pressure ring 25 extends out of the groove to abut against all the friction rings; A swivel 26 is provided between the pressure ring 25 and the lower center tube 11, and the track pin 27 is passed through the swivel 26; One end of the third retaining ring 28 is sleeved on and fixedly connected to the pressing ring 25 , and the other end is sleeved on the lower center tube 11 .

[0031] For example, when the tool is being lowered and in place, the track pin 27 is always in the short track groove of the lower center tube 11. At this time, the pipe column is lifted, and the upper joint 1 drives the upper center tube 3 and the lower center tube 11 to move upward. The friction block 23 is tightened on the casing wall and remains relatively immobile under the action of the compression spring 24. The top sleeve 21, the stabilizing body 22, the pressure ring 25, the swivel 26, the track pin 27 and the third retaining ring 28 connected thereto are also fixed. During the unsealing action, there is no pressure in the oil pipe, and the hydraulic mechanism does not generate an extrusion force on the rubber cylinder 5. The pipe column is lifted, and the top sleeve 21, the stabilizing body 22, the pressure ring 25, the swivel 26, the track pin 27 and the third retaining ring 28 are fixed. The three-block ring 28 is relatively fixed on the wall of the sleeve under the action of the compression spring 24 and the friction block 23. When lifting, the upper joint 1 drives the upper center tube 3 and the lower center tube 11 to move upward, and the track pin 27 switches from the long track groove of the lower center tube 11 to the short track groove. When lifting, the lower center tube 11 drives the ball blocking sleeve 19 to move upward and separate from the top sleeve 21, and the steel ball returns to the locking ball sleeve 16 to lock the lower center tube 11. The ball blocking sleeve 19 moves downward under the action of the spring 17 to block the steel ball 20. The cava 13 and the rubber cylinder 5 are both in an outwardly expanded state. When lifting, the rubber cylinder 5 and the cava 13 move downward depending on the friction force of the sleeve, and the cava 13 and the rubber cylinder 5 return to their initial state.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A Y211 type hydraulically assisted fracturing packer, comprising an upper joint (1), an upper central pipe (3), a lower central pipe (11) and a lower joint (29) which are fixedly connected in sequence, wherein a liquid inlet hole is provided at a location of the upper central pipe (3) close to the upper joint (1), characterized in that: The upper central pipe (3) is provided with a packing assembly, one end of which is provided with a fracturing driving member, and the other end of which is provided with a cone cap (9). One end of the fracturing driving member is in contact with the upper joint (1), and a cavity is provided inside the fracturing driving member. One end of the cavity is communicated with the liquid inlet hole. The lower central pipe (11) is provided with an anchoring assembly and a straightening assembly. One end of the anchoring assembly is arranged inside the cone cap (9), and the other end is provided with an anchoring driving member in a transmission connection. One end of the straightening assembly is fixedly provided with a top sleeve (2 1), one end of the top sleeve (21) extends to the interior of the anchoring drive member, a long track groove and a short track groove are provided at a location of the lower center tube (11) near the lower joint (29), the long track groove and the short track groove are arranged alternately, the bottoms of the long track groove and the short track groove are connected to each other, and a track pin (27) that can move freely in the long track groove and the short track groove is provided at one end of the straightening assembly away from the top sleeve (21), and the track pin (27) can be switched between the long track groove and the short track groove by lifting the lower center tube (11); The packing assembly comprises a plurality of rubber tubes (5) sleeved on the upper central tube (3), and a spacer ring (6) is provided between each of the rubber tubes (5); The anchor assembly comprises: A second retaining ring (10) is arranged inside the cone cap (9), and the second retaining ring (10) is sleeved on the upper center tube (3); A cone (12), the cone portion of which is sleeved on the lower center tube (11), and the other end of which is inserted between the cone cap (9) and the second retaining ring (10); the cone (12) is fixedly connected to the cone cap (9); at least one loosening pin is fixedly provided on the inner walls of the cone (12) and the cone cap (9); the loosening pin on the cone cap (9) passes through the upper center tube (3) and is inserted on the lower center tube (11); and the loosening pin on the cone (12) passes through the second retaining ring (10) and is inserted on the upper center tube (3); A connecting sleeve (14) is sleeved on the lower central tube (11), one end of the connecting sleeve (14) is inserted into the cone (12), and the other end abuts against the lower central tube (11); A cava support (15) is sleeved on the connecting sleeve (14), one end of the cava support (15) is against the connecting sleeve (14), and the other end is slidably connected with a cava (13), and the free end of the cava (13) is fitted on the conical surface of the cone (12); The righting assembly comprises: A straightening body (22) is sleeved on the lower center tube (11), a plurality of grooves are arranged on the outer wall of the straightening body (22), a friction block (23) is arranged inside each of the grooves, a plurality of compression springs (24) are arranged inside each of the friction blocks (23), each of the compression springs (24) passes through the friction block (23) and abuts against the bottom of the groove, the top sleeve (21) is sleeved on one end of the straightening body (22), one end of the top sleeve (21) extends out of the groove and abuts against one end of all the friction blocks (23); A pressure ring (25) is sleeved on one end of the centralizing body (22) away from the top sleeve (21) and fixedly connected thereto, one end of the pressure ring (25) extending out of the groove to abut against all the friction rings; A swivel (26) is arranged between the pressure ring (25) and the lower center tube (11), and the track pin (27) is passed through the swivel (26); A third retaining ring (28) has one end sleeved on the pressure ring (25) and fixedly connected thereto, and the other end sleeved on the lower center tube (11).

2. A Y211 type hydraulically assisted fracturing packer according to claim 1, characterized in that: The fracturing driving component comprises: A first retaining ring (4) is sleeved on the upper central pipe (3), one end of the first retaining ring (4) extending outwards is provided with a push ring, and the push ring abuts against the packing assembly; An adjusting ring (2), one end of which is sleeved on the upper joint (1) and abutted against each other, and the other end of which is sleeved on the first retaining ring (4), so that a cavity is formed between the adjusting ring (2), the first retaining ring (4) and the upper joint (1); At least one locking block (33) is inserted into the first retaining ring (4), one end of the locking block (33) is inserted into the upper center tube (3), and the other end is arranged close to the cavity.

3. A Y211 type hydraulically assisted fracturing packer according to claim 2, characterized in that: At least one first rubber ring (30) is provided between the upper joint (1) and the adjusting ring (2), at least one second rubber ring (31) is provided between the adjusting ring (2) and the first retaining ring (4), and at least one third rubber ring (32) is provided between the first retaining ring (4) and the upper center tube (3).

4. A Y211 type hydraulically assisted fracturing packer according to claim 1, characterized in that: An O-type rubber ring (7) is provided between the upper central tube (3) and the lower central tube (11) for sealing.

5. A Y211 type hydraulically assisted fracturing packer according to claim 1, characterized in that: The anchor drive comprises: A ball locking sleeve (16) is sleeved on the lower central tube (11), one end of the ball locking sleeve (16) is arranged between the connecting sleeve (14) and the cavatole (15), and the other end is provided with a plurality of through holes, each of the through holes is provided with a steel ball (20), and each of the steel balls (20) is clamped on the lower central tube (11); A ball blocking sleeve (19) is sleeved on the ball locking sleeve (16), and a middle portion of the ball blocking sleeve (19) abuts against the ball locking sleeve (16); A spring (17) is sleeved on the ball locking sleeve (16), and two ends of the spring (17) are respectively pressed against the cavatole (15) and the ball blocking sleeve (19); The protective sleeve (18) has one end sleeved on the cava holder (15) and fixedly connected thereto, and the other end sleeved on the top sleeve (21), and an annular groove for releasing the steel ball (20) is provided on the inner wall of the top sleeve (21).

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