A high temperature and high pressure resistant packer for deep oil fields

Abstract

The present invention belongs to the technical field of packers, and discloses a high-temperature and high-pressure resistant packer for deep oilfield applications, which includes a packer body provided with slips; a mounting ring arranged on the packer body, and a mounting and dismounting assembly is provided at the top of the mounting ring for mounting and dismounting the slips. The mounting and dismounting assembly includes: two moving rings connected to the bottom of the slips, a first fixing groove is formed on the side where the two moving rings are close to each other, a first limiting assembly is arranged in the first fixing groove, a first limiting groove is formed on the packer body, and the first limiting assembly is inserted into the first limiting groove for fixing the slips on the packer body. Through the moving rings, the first limiting assembly and the second limiting assembly, it is convenient to install and disassemble multiple slips at the same time. At the same time, the first limiting assembly is protected and limited by the protective block, improving the stability and convenience during the installation and disassembly of the slips, and thus facilitating the use of the packer.

Description

Technical Field

[0001] The present invention belongs to the technical field of packers, and particularly relates to a high-temperature and high-pressure resistant packer for deep oilfield applications. Background Art

[0002] In the exploitation of oil and natural gas, packers are required to achieve zonal isolation in deep wells under high-temperature and high-pressure environments, and seal the annular space between the tubing and the casing or the open-hole wellbore. Packers mainly feature high-temperature and high-pressure resistance, good sealing performance, and excellent anchoring ability. After the packer is lowered into the well to the designed position along with the tubing, the rubber cylinder is expanded and deformed through hydraulic, mechanical, or other means to seal the annular space between the tubing and the casing, thereby achieving zonal isolation.

[0003] However, in the existing process, the slips on the packer are worn after long-term use. When it affects the use, the slips need to be installed and removed one by one, and multiple slips cannot be installed and removed simultaneously, which is not convenient for improving the convenience of installation and removal. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention proposes the following technical solutions:

[0005] A high-temperature and high-pressure resistant packer for deep oilfield applications, comprising:

[0006] A packer body provided with slips;

[0007] An installation ring disposed on the packer body, and an installation and removal assembly is provided at the top of the installation ring for installing and removing the slips;

[0008] The installation and removal assembly includes:

[0009] Two moving rings connected to the bottom of the slips. A first fixing groove is formed on the side where the two moving rings are close to each other, and a first limiting component is arranged in the first fixing groove;

[0010] A first limiting groove is formed on the packer body, and the first limiting component is inserted into the first limiting groove for fixing the slips on the packer body;

[0011] A second limiting component is arranged between the installation ring and the two moving rings.

[0012] As a preference of the above technical solution, the packer body includes:

[0013] A locator connected to a fracturer, the fracturer is connected to a casing, the installation ring is connected to the fracturer, the moving ring is arranged outside the bottom end of the casing, and the first limiting groove is formed on the outside of the casing;

[0014] A hydraulic injector connected to the top of the casing, and a safety release is arranged at the top of the hydraulic injector;

[0015] The rubber sleeve is sleeved outside the sleeve.

[0016] As an optimization of the above technical solution, the first limiting component includes:

[0017] The first limiting block is arranged inside the moving ring, and the first limiting block is inserted into the first limiting groove;

[0018] The arc-shaped block is slidably arranged in the first fixing groove;

[0019] The connecting rod is connected to one side of the first limiting block, and one end of the connecting rod passes through the first limiting block and is connected with a limiting plate;

[0020] The limiting plate is arranged at the outer connection of the two moving rings, and the limiting plate and the arc-shaped block are connected with the telescopic rod through the first elastic member.

[0021] As an optimization of the above technical solution, the second limiting component includes:

[0022] The fixed block is connected to the bottoms of the two moving rings;

[0023] Two protective blocks are slidably connected to the top of the mounting ring for protecting the fixed block;

[0024] The limiting member is arranged on the inner walls of the two protective blocks;

[0025] The slot is opened on one side of the fixed block, and the limiting member is inserted into the slot.

[0026] As an optimization of the above technical solution, the two protective blocks are located between the mounting ring and the moving ring, the number of the limiting members is the same as that of the fixed blocks, and they are all located between the two protective blocks and the fracturing device.

[0027] As an optimization of the above technical solution, a clamping block is arranged on one side of the slip near the fracturing device, a first movable opening is opened on one side of the clamping block, a mounting groove is opened on one side of the fracturing device near the clamping block, and the clamping block is inserted into the mounting groove for limiting the position of the slip;

[0028] A protective adjusting component is arranged on one side of the mounting groove and on the slip, a pushing member is connected in the mounting groove, and the pushing member includes:

[0029] The push rod is connected to the inner wall of the mounting groove;

[0030] The extrusion block is connected to one side of the push rod, and the shape of the extrusion block is trapezoidal for pushing the protective adjusting component to move.

[0031] As an optimization of the above technical solution, the protective adjusting component includes:

[0032] Two movable blocks are slidably arranged inside the slip, the two movable blocks are connected by a second elastic member, and the sides of the two movable blocks close to each other are inclined planes;

[0033] A moving block, connected to the top of the movable block;

[0034] A groove, arranged on both sides of the slip, and the moving block is slidably connected to the inside of the groove;

[0035] A support plate, hinged between the groove and the moving block.

[0036] As an optimization of the above technical solution, moving openings are provided on both sides of the bottom end of the slip for the movement of the two movable blocks, and the groove communicates with the moving openings.

[0037] The beneficial effects of the present invention are as follows:

[0038] (1) Through the moving ring, the first limiting component and the second limiting component, the present invention facilitates the installation and disassembly of multiple slips at the same time. Meanwhile, the first limiting component is protected and limited by the protection block, improving the stability and convenience during the installation and disassembly of the slips, and thus facilitating the use of the packer;

[0039] (2) Through the function of the clamping block, the present invention further improves the accuracy and stability of the installation position of the slip. Meanwhile, through the functions of the push rod and the extrusion block, and with the cooperation of the movable block, the moving block and the support plate, the contact area between the slip and the moving ring is increased, improving the stability of the installation and use of the slip, reducing the phenomenon of slip deformation that affects the disassembly and installation effect, and thus increasing the service life of the slip. Description of the Drawings

[0040] Figure 1 Shows the overall structural schematic diagram of the embodiment;

[0041] Figure 2 Shows the structural diagram of the clamping position and the installation and disassembly component of the embodiment;

[0042] Figure 3 Shows the structural diagram of the second limiting component of the embodiment;

[0043] Figure 4 Shows the structural diagram of the installation ring, the fracturing tool and the locator of the embodiment;

[0044] Figure 5 Shows the structural diagram of the slip and the moving ring of the embodiment;

[0045] Figure 6 Shows the structural diagram of the protection and adjustment component of the embodiment;

[0046] Figure 7 Shows the structural diagram of the moving ring, the fixed block and the limiting member of the embodiment;

[0047] Figure 8 Shows the cross-sectional view of the moving ring of the embodiment.

[0048] In the figure: 1, slip; 2, mounting ring; 3, moving ring; 4, locator; 5, fracturing device; 6, casing; 7, hydraulic injector; 8, safety release; 9, rubber sleeve; 10, first limiting block; 11, arc-shaped block; 12, connecting rod; 13, limiting plate; 14, first elastic member; 15, telescopic rod; 16, fixing block; 17, protective block; 18, connecting block; 19, second limiting block; 20, slot; 21, clamping block; 22, push rod; 23, extrusion block; 24, movable block; 25, second elastic member; 26, moving block; 27, support plate. Specific embodiments

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0050] The present invention provides a high-temperature and high-pressure resistant packer for deep oilfield applications, as Figures 1 to 4 shown, including a packer body, a slip 1, a mounting ring 2, and an installation and disassembly assembly. A slip 1 is provided on the packer body, and the mounting ring 2 is arranged on the packer body. The number of mounting rings 2 is two, and one side of them is in contact. An installation and disassembly assembly is provided at the top of the mounting ring 2. Through the mounting ring 2 and the installation and disassembly assembly, it is convenient to install the slip 1 on the packer body. The installation and disassembly assembly is used for installing and disassembling the slip 1. The installation and disassembly assembly includes two moving rings 3, a first fixing groove, a first limiting component, a first limiting groove, and a second limiting component. The two moving rings 3 are fixedly connected to the bottom of the slip 1. The number of slips 1 is four, and they are arranged around the outer side of the bottom end of the casing 6. Two slips 1 are provided at the top of each moving ring 3. A first fixing groove is opened on the side where the two moving rings 3 are close to each other. A first limiting component is arranged in the first fixing groove. The first limiting groove is opened on the packer body. The first limiting component is inserted into the first limiting groove to fix the slip 1 on the packer body. Through the first limiting component, the two moving rings 3 and the slip 1 can be connected to and disassembled from the packer body. The second limiting component is arranged between the mounting ring 2 and the two moving rings 3 to further limit the installation of the slip 1 and the packer body.

[0051] Install the two mounting rings 2 on the packer body. Through the mounting ring 2, the two moving rings 3 and the slip 1 are positioned outside the packer body, so that multiple slips 1 are aligned with the position to be installed. Move the two moving rings 3, and insert and limit them through the first limiting component and the first fixing groove, so that multiple slips 1 can be installed and fixed on the packer body at one time. Under the action of the second limiting component, the first limiting component is limited again to improve the stability of the first limiting component, so that the installation of the slip 1 is limited, thereby improving the stability and convenience of the installation.

[0052] When it is necessary to disassemble the slip 1, move the second limiting component to release the limitation on the first limiting component, and then move the first limiting component so that the first limiting component no longer limits the slip 1, and the slip 1 is no longer limited on the packer body. Move the moving ring 3 away from both sides of the packer body, so that the moving ring 3 drives the slip 1 away from the packer body. Then, drive the moving ring 3, the first limiting component and the second limiting component away from the packer body by the mounting ring 2, so that multiple slips 1 can be replaced at one time, improving the convenience during disassembly and facilitating use.

[0053] As Figures 1 to 4 shown, the packer body includes a locator 4, a fracturer 5, a casing 6, a hydraulic injector 7, a safety release 8 and a rubber sleeve 9. The top of the locator 4 is fixedly connected to the fracturer 5, the top of the fracturer 5 is fixedly connected to the casing 6, the mounting ring 2 is fixedly connected to the fracturer 5, the moving ring 3 is arranged outside the bottom end of the casing 6, the mounting ring 2 is located at the bottom of the moving ring 3, a first limiting groove is formed on the outside of the casing 6, the hydraulic injector 7 is fixedly connected to the top of the casing 6, the safety release 8 is arranged on the top of the hydraulic injector 7, and the rubber sleeve 9 is sleeved on the outside of the casing 6 for sealing.

[0054] During use, the casing 6 is lowered into the oil well, and then the fracturer 5 and the hydraulic injector 7 are positioned at the target formation through the locator 4. Hydraulic injection and fracturing are carried out through the hydraulic injector 7 and the fracturer 5, and then the rubber sleeve 9 is compressed to expand and fit the casing 6 to form a seal. Finally, the tool is withdrawn using the safety release 8. By installing the mounting ring 2 on the fracturer 5, the first limiting component, the moving ring 3, the second limiting component and the slip 1 can be installed, facilitating the installation of the slip 1 on the casing 6. Through the movement of the first limiting component, it can be inserted into the first limiting groove on one side of the fracturer 5 to limit the installation of the slip 1.

[0055] As Figure 5 、 Figure 7 、 Figure 8As shown, in order to be able to install and disassemble multiple slips 1 simultaneously and improve the stability of installation and the convenience of disassembly, the first limiting component includes a first limiting block 10, an arc-shaped block 11, a connecting rod 12, a limiting plate 13, a first elastic member 14 and a telescopic rod 15. The first limiting block 10 is arranged at the connection part inside the moving ring 3. The first limiting block 10 is inserted into the first limiting groove. Both ends of the arc-shaped block 11 are located inside the first fixing grooves of the two moving rings 3 respectively, and the arc-shaped block 11 is slidably connected to the inner wall of the first fixing groove. The connecting rod 12 is fixedly connected to one side of the first limiting block 10. A second moving opening is formed in the middle of the first limiting block 10. One end of the connecting rod 12 passes through the second moving opening and is fixedly connected to the limiting plate 13. The limiting plate 13 is arranged at the outer connection part of the two moving rings 3. One side of the limiting plate 13 is in contact with the outer walls of the two moving rings 3. The limiting plate 13 and the arc-shaped block 11 are connected by the first elastic member 14 and the telescopic rod 15. One end of the first elastic member 14 is fixedly connected to one side of the limiting plate 13, and the other end is fixedly connected to one side of the arc-shaped block 11. The first elastic member 14 is located outside the second moving opening and between the telescopic rods 15. Two second fixing grooves are formed in one side of the arc-shaped block 11 close to the limiting plate 13. The telescopic rod 15 is fixedly installed in the second fixing groove, and one end of the telescopic rod 15 passes through the second fixing groove and is fixedly connected to one side of the limiting plate.

[0056] When starting to install the slip 1, after the installation ring 2 is installed on the fracturing tool 5 and the second limiting component and the moving ring 3 are located outside the casing 6, align the first limiting block 10 with the first limiting groove, pull the limiting plate 13 to drive the first elastic member 14 to stretch. Through the action of the first elastic member 14, the telescopic rod 15 is pushed to elongate. The elongation of the telescopic rod 15 further limits the position of the limiting plate 13. When the limiting plate 13 drives the connecting rod 12 to drive the first limiting block 10 to move into the second moving opening, push the moving ring 3 in the direction close to the casing 6, so that the moving ring 3 drives the slip 1 to move. When the two sides of the moving ring 3 are in contact, the slip 1 is moved to the position where the casing 6 needs to be installed. Then push the limiting plate in the direction of the moving ring 3 to make the first elastic member 14 contract. The first elastic member 14 can be a compression spring. Through the elastic action of the first spring member and drive the telescopic rod 15 to contract, the limiting plate 13 drives the connecting rod 12 to push the first limiting block 10 to move into the first limiting groove. At this time, the limiting plate 13 moves to the outer connection part of the two moving rings 3 to limit the two moving rings 3. At the same time, the first limiting block 10 and the first limiting groove are inserted and limited, so that multiple slips 1 are installed on the casing 6 simultaneously, improving the stability of the installation of the slip 1.

[0057] When it is necessary to disassemble the slip 1, pull the limit plate 13 in the direction away from the moving ring 3, so that the first elastic member 14 stretches to drive the telescopic rod 15 to extend. At the same time, the connecting rod 12 drives the first limiting block to move into the first movable port, so that the first limiting block 10 is no longer inserted into the first limiting groove. Then push the moving ring 3 in the direction away from the casing 6, so that the two moving rings 3 move along the arc-shaped block 11, driving the slip 1 away from the casing 6, and taking the moving ring 3 and the slip 1 off from the second limiting component, so that the slip 1 can be replaced.

[0058] As Figure 3 , Figure 7 shown, in order to limit the positions of the two moving rings 3 and the slip 1 and prevent the slip 1 from deforming and moving, which is not convenient for installation and disassembly, the second limiting component includes a fixed block 16, two protective blocks 17 and a limiting member. The fixed block 16 is fixedly connected to the bottoms of the two moving rings 3. The two protective blocks 17 are slidably connected to the top of the mounting ring 2 for protecting the fixed block 16. Two arc-shaped grooves are formed in the top of the mounting ring 2. The limiting member is connected to the inner walls of the two protective blocks 17. The two protective blocks 17 are located between the mounting ring 2 and the moving ring 3. The number of the limiting members is the same as that of the fixed block 16, and they are both located between the two protective blocks 17 and the fracturing tool 5. The limiting member includes a connecting block 18 and a second limiting block 19. The connecting block 18 is fixedly installed on the inner wall of the protective block 17. The bottom of the connecting block 18 is slidably connected to the inner wall of the arc-shaped groove. A second limiting block 19 is fixedly connected to one side of the connecting block 18. A slot 20 is formed in one side of the fixed block 16, and the second limiting block 19 is inserted into the slot 20.

[0059] When the moving ring 3 moves to the top of the protective block 17, the moving ring 3 drives the fixed block 16 to move between the two protective blocks 17 and be located between the protective block 17 and the casing 6. The protective block 17 is installed through the mounting ring 2. After the moving ring 3 is installed, the protective block 17 supports and fixes the bottom of the moving ring 3, which is convenient for improving the installation stability of the slip 1. Then rotate the two protective blocks 17, so that the protective blocks 17 move along the top of the mounting ring 2 and drive the connecting block 18 and the second limiting block 19 to move. When the second limiting block 19 is inserted into the slot 20 on one side of the fixed block 16, the gap between the two protective blocks 17 is away from the fixed block 16, so that both of the two protective blocks 17 can shield and protect the fixed block 16, and limit the moving ring 3 again to improve the installation stability of the slip 1 and the moving ring 3. At the same time, the second limiting block 19 is inserted into the slot 20 of the fixed block 16 to limit the protective block 17 and prevent the protective block 17 from moving, affecting the protective effect on the fixed block 16.

[0060] As Figures 2 to 6As shown in the figure, in order to improve the stability of the slip 1 during installation and prevent the slip 1 from being difficult to fit tightly against the wall of the casing 6, a clamping block 21 is provided on one side of the slip 1 close to the fracturing tool 5. A first movable opening is formed on one side of the clamping block 21. The installation groove is formed on the side of the fracturing tool 5 close to the clamping block 21. The clamping block 21 is inserted into the installation groove. A protective adjustment component is provided between one side of the installation groove and the slip 1. A second limiting groove is formed inside the bottom end of the slip 1. The protective adjustment component is located inside the second limiting groove. A pushing member is connected inside the installation groove. The pushing member includes a push rod 22 and an extrusion block 23. The push rod 22 and the extrusion block 23 are arranged corresponding to the first movable opening. The first movable opening communicates with the second limiting groove. The push rod 22 is fixedly connected to the inner wall of the installation groove. The extrusion block 23 is fixedly connected to one side of the push rod 22. The shape of the extrusion block 23 is T-shaped, which is used to push the protective adjustment component to move. The protective adjustment component includes two movable blocks 24, a second elastic member 25, a moving block 26 and a support plate 27. The two movable blocks 24 are slidably connected to the second limiting groove. The two movable blocks 24 are connected by the second elastic member 25. The sides of the two movable blocks 24 close to each other are inclined planes. The moving block 26 is fixedly connected to the top of the movable block 24. Grooves are formed on both sides of the slip 1. The moving block 26 is slidably connected inside the groove. One end of the support plate 27 is hinged to the inner wall of the groove, and the other end is hinged to the moving block 26. Moving openings are formed on both sides of the bottom end of the slip 1 for the two movable blocks 24 to move. The groove communicates with the moving opening.

[0061] When the moving ring 3 is inserted into the first limiting groove through the first limiting block 10 and the two moving rings 3 are in contact with each other on one side, the slip 1 is driven to move to one side of the casing 6, so that the clamping block 21 on one side of the slip 1 is inserted into the installation groove. At the same time, the push rod 22 inside the installation groove drives the extrusion block 23 to move into the second limiting groove of the slip 1 through the first movable opening, so that the extrusion block 23 extrudes the inclined plane on one side of the movable block 24, stretching the second elastic member 25. The second elastic member 25 can be a compression spring, which is convenient to push the movable block 24 to move along the inner wall of the second limiting groove to the outside of the slip 1 through the moving opening. When one end of the movable block 24 moves to the outside of the slip 1, it drives the moving block 26 to move out of the groove. The contact area between the slip 1 and the moving ring 3 is increased through the movable block 24 and the moving block 26. At the same time, when the moving block 26 moves, it drives the support plate 27 to deflect, and the support plate 27 supports and fixes the moving block 26, improving the stability of the moving block 26, and further improving the stability of the slip 1, preventing the slip 1 from deforming and affecting the use effect.

[0062] Working principle: When in use, install the two mounting rings 2 on the fracturing device 5 so that the protective blocks 17 are located outside the fracturing device 5. Then, put the moving ring 3 and the slip 1 on the outer side of the bottom end of the casing 6, and make the fixed block 16 located in the gap between the two protective blocks 17. Support and limit the moving ring 3 through the protective blocks 17. Pull the limit plate 13 to drive the first elastic member 14 to stretch. Through the action of the first elastic member 14, push the telescopic rod 15 to extend. The extension of the telescopic rod 15 further limits the position of the limit plate 13. When the limit plate 13 moves, it also drives the connecting rod 12 to drive the first limiting block 10 to move into the second movable port. Then, push the moving ring 3 in the direction close to the casing 6, so that the moving ring 3 drives the slip 1 to move. When the two sides of the moving ring 3 are in contact, the slip 1 moves to the position where the casing 6 needs to be installed. Then, push the limiting plate in the direction of the moving ring 3 to make the first elastic member 14 contract. The first elastic member 14 can be a compression spring. Through the elastic action of the first spring member and drive the telescopic rod 15 to contract. The limit plate 13 drives the connecting rod 12 to push the first limiting block 10 to move into the first limiting groove. At this time, the limit plate 13 moves to the connection part outside the two moving rings 3 to limit the two moving rings 3. At the same time, the first limiting block 10 is inserted and limited with the first limiting groove, so that multiple slips 1 are installed on the casing 6 at the same time.

[0063] When one side of the two moving rings 3 is in contact, the moving ring 3 drives the fixed block 16 to move from the gap between the two protective blocks 17 to the position between the protective block 17 and the casing 6. Then, rotate the protective block 17 to move along the top of the mounting ring 2, so that the connecting block 18 drives the second limiting block 19 to move. When the second limiting block 19 is inserted into the slot 20 on one side of the fixed block 16, the gap between the two protective blocks 17 moves away from the fixed block 16, so that both of the two protective blocks 17 can shield and protect the fixed block 16, and limit the moving ring 3 again. At the same time, through the insertion of the second limiting block 19 into the slot 20 of the fixed block 16, the protective block 17 is limited.

[0064] When the moving ring 3 is inserted into the first limiting slot through the first limiting block 10 and one side of the two moving rings 3 is in contact, the two moving rings 3 drive the slip 1 to move to one side of the casing 6, so that the clamping block 21 on one side of the slip 1 is inserted into the mounting slot. At the same time, the push rod 22 inside the mounting slot drives the extrusion block 23 to move through the first movable port into the second limiting groove of the slip 1, so that the extrusion block 23 extrudes the inclined surface on one side of the movable block 24, so that the second elastic member 25 stretches, and pushes the movable block 24 to move along the inner wall of the second limiting groove through the movable port to the outside of the slip 1. When one end of the movable block 24 moves to the outside of the slip 1, it drives the moving block 26 to move out of the groove. The contact area between the slip 1 and the moving ring 3 is increased through the movable block 24 and the moving block 26. At the same time, when the moving block 26 moves, it drives the support plate 27 to deflect, and the support plate 27 supports and fixes the moving block 26.

[0065] After the slips 1 are installed, they are lowered to the predetermined position in the well through the locator 4. High-pressure liquid is injected into the hydraulic cavity inside the packer through the pipe string from the ground. As the pressure in the hydraulic cavity increases, the pistons in the locator 4, the fracturer 5, and the hydraulic injector 7 are simultaneously subjected to uniform hydraulic thrust. Since the pistons are connected to the slips 1 through connecting rods, when the pistons move linearly under the action of the hydraulic thrust, the linear motion of the pistons is converted into the radial motion of the slips 1, thereby expanding the slips 1. When the slips 1 move, they drive the latch blocks 21 to move, causing the push rod 22 to drive the extrusion block 23 away from the movable block 24. Under the action of the second elastic member 25, the two movable blocks 24 drive the movable block 26 to gradually move into the groove, and the support plate 27 deflects back to its original position. Furthermore, the slips 1 are continuously pushed outwards, and the teeth on their outer surface approach and contact the inner wall of the casing 6, tightly biting the wall of the casing 6, and then squeezing the rubber sleeve 9 on the casing 6, causing the rubber sleeve 9 to expand and tightly adhere to the wall of the casing 6, thereby closing the annular space between the tubing and the casing 6. The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it.

Claims

1. A high-temperature and high-pressure resistant packer for deep oil fields, characterized in that, Including: A packer body provided with slips (1). An installation ring (2) is arranged on the packer body. An installation and disassembly component is arranged at the top of the installation ring (2) for installing and disassembling the slips (1). The installation and disassembly component includes: Two moving rings (3) are connected to the bottom of the slips (1). A first fixing groove is formed on the side where the two moving rings (3) are close to each other, and a first limiting component is arranged in the first fixing groove. A first limiting groove is formed on the packer body. The first limiting component is inserted into the first limiting groove for fixing the slips (1) on the packer body. A second limiting component is arranged between the installation ring (2) and the two moving rings (3).

2. The high-temperature and high-pressure resistant packer for deep oil fields according to claim 1, wherein The packer body includes: A locator (4) is connected to a fracturer (5). The fracturer (5) is connected to a casing (6). The installation ring (2) is connected to the fracturer (5). The moving ring (3) is arranged on the outer side of the bottom end of the casing (6). The first limiting groove is formed on the outer side of the casing (6). A hydraulic injector (7) is connected to the top of the casing (6). A safety release (8) is arranged at the top of the hydraulic injector (7). A rubber sleeve (9) is sleeved on the outer side of the casing (6).

3. The high-temperature and high-pressure resistant packer for deep oilfields according to claim 2, characterized in that, The first limiting component includes: A first limiting block (10) is arranged on the inner side of the moving ring (3). The first limiting block (10) is inserted into the first limiting groove. An arc-shaped block (11) is slidably arranged in the first fixing groove. A connecting rod (12) is connected to one side of the first limiting block (10). One end of the connecting rod (12) passes through the first limiting block (10) and is connected with a limiting plate (13). The limiting plate (13) is arranged at the outer connection of the two moving rings (3). The limiting plate (13) is connected with the arc-shaped block (11) through a first elastic member (14) and a telescopic rod (15).

4. The high-temperature and high-pressure resistant packer for deep oil fields according to claim 3, wherein The second limiting component includes: A fixing block (16) is connected to the bottom of the two moving rings (3). Two protective blocks (17) are slidably connected to the top of the installation ring (2) for protecting the fixing block (16). A limiting member is arranged on the inner walls of the two protective blocks (17). A slot (20) is formed on one side of the fixing block (16). The limiting member is inserted into the slot (20).

5. The high-temperature and high-pressure resistant packer for deep oil fields according to claim 4, wherein, The two protective blocks (17) are located between the installation ring (2) and the moving ring (3). The number of the limiting members and the fixing blocks (16) is the same, and they are both located between the two protective blocks (17) and the fracturer (5).

6. The high-temperature and high-pressure resistant packer for deep oilfields according to claim 5, characterized in that, A clamping block (21) is arranged on the side of the slips (1) close to the fracturer (5). A first movable opening is formed on one side of the clamping block (21). An installation groove is formed on the side of the fracturer (5) close to the clamping block (21). The clamping block (21) is inserted into the installation groove for limiting the position of the slips (1). A protective adjustment component is arranged on one side of the installation groove and on the slips (1). A pushing member is connected in the installation groove. The pushing member includes: A push rod (22), the push rod (22) being connected to the inner wall of the installation groove; The extrusion block (23) is connected to one side of the push rod (22); the extrusion block (23) is in a trapezoidal shape and is used to push the protection adjustment component to move.

7. The high-temperature and high-pressure resistant packer for deep oilfields according to claim 6, characterized in that, The protection adjustment component comprises: Two movable blocks (24) are slidably arranged inside the slip (1), the two movable blocks (24) are connected via a second elastic member (25), and the sides of the two movable blocks (24) that are close to each other are inclined surfaces; A moving block (26) connected to the top of the movable block (24); Grooves are arranged on both sides of the slip (1), and the moving block (26) is slidably connected inside the grooves; A support plate (27) is hingedly arranged between the groove and the moving block (26).

8. The high-temperature and high-pressure resistant packer for deep oilfields according to claim 7, characterized in that, Both sides of the bottom end of the slip (1) are provided with moving openings for the two movable blocks (24) to move, and the grooves are in communication with the moving openings.

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