Tubing plug packoff

Abstract

The present application relates to the technical fields of packer, in particular to a tubing plugging and sealing device; comprising a central pipe body, an anchoring unit, a plugging unit and a connecting unit, the anchoring unit is fixedly connected with the central pipe body, the plugging unit is provided with a first elastic body and a second elastic body, the first elastic body and the second elastic body are sleeved on the central pipe body, after the first elastic body and the second elastic body are inserted on one side of the damaged part of the tubing, they can be separated on both sides of the damaged part of the tubing, the connecting unit is slidingly connected with the central pipe body, the connecting unit can be connected with a driving tool, the driving tool drives the connecting unit to slide, so that the first elastic body and the second elastic body are tightly sealed with the tubing, thereby the both sides of the damaged part of the tubing can be plugged, the damaged part of the tubing can not cause inconvenience to the oil production work, the damaged part of the tubing can be repaired without taking out the tubing, and the repair difficulty and cost of the damaged part of the tubing are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of packer technology, and in particular to a pipe sealing and packing device. Background Technology

[0002] In oil extraction operations, tubing is one of the commonly used tools in multiple processes such as oil testing, oil production, and water injection. For example, the oilfield production tubing disclosed in patent application number CN201620096304.7 can achieve rapid filtration and oil production by setting an oil outlet filter on the inner wall of the tubing.

[0003] However, during water injection development in oilfields, frequent changes in formation displacement and geostress, along with factors such as downhole operations and fluid corrosion, can damage the well casing and tubing. This damage manifests primarily as rupture, breakage, narrowing, and bending. If left unattended, this can contaminate the formation, reduce crude oil recovery, and alter the formation's pH profile, increasing subsequent construction costs, making construction more difficult, and reducing production efficiency.

[0004] To prevent damage to the oil pipeline from affecting the oil extraction process, the current practice is to remove the entire oil pipeline using tools and repair the damaged parts, which results in high difficulty and cost of repairing the damaged parts of the oil pipeline. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an oil pipe sealing and blocking device to solve the technical problems of high difficulty and high cost of repairing damaged parts of oil pipes in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention provides an oil pipe plugging and sealing device, comprising:

[0007] A central tube body, which is used to be inserted into an oil pipe;

[0008] An anchoring unit, which is fixedly connected to the central tube body, is used to clamp the oil pipe;

[0009] A plugging unit, comprising a first elastic body and a second elastic body, both the first elastic body and the second elastic body being sleeved on the central tube body, and the first elastic body and the second elastic body being inserted into the oil pipe through the central tube body and positioned on both sides of the damaged part of the oil pipe;

[0010] A connecting unit is slidably connected to the central tube body. The connecting unit is used for connection to a driving tool so that, driven by the driving tool, the first elastic body and the second elastic body are pressed together to seal and fit the oil pipe.

[0011] Optionally, the tubing plugging and sealing device further includes an anchoring drive component, which is slidably connected to the central tube body and located between the first elastic body and the anchoring unit. The anchoring drive component can drive the anchoring unit to engage with the tubing by pressing the first elastic body.

[0012] Optionally, the connecting unit includes a first connecting cylinder, which is slidably connected to the outside of the central tube and located on the side of the first elastic body away from the anchoring drive member. The first connecting cylinder is used for connection to the driving tool to press the first elastic body toward the anchoring drive member by the driving tool, so that the first elastic body expands radially and presses the anchoring drive member.

[0013] Optionally, the tubing sealing and packing device further includes a first breakable pin, the two ends of which are respectively fixed to the first connecting cylinder and the central tube.

[0014] Optionally, the tubing plugging and sealing device further includes a second breakable pin, the two ends of which are respectively fixed to the anchoring drive and the central tube.

[0015] Optionally, the anchoring unit includes a slip and a third breakable pin. The slip is sleeved on the central tube and located on the side of the anchoring drive member away from the first elastic body. The two ends of the third breakable pin are respectively fixed to the slip and the central tube. The anchoring drive member can drive the slip to expand and engage the oil pipe by moving towards the slip.

[0016] Optionally, the connecting unit further includes a second connecting cylinder and a driving cylinder. The second connecting cylinder is slidably connected to the inner side of the central tube body. One end of the driving cylinder is fixed to the second connecting cylinder, and the other end of the driving cylinder is slidably connected to the outer side of the central tube body and extends to one side of the second elastic body. The second connecting cylinder is used for connection to the driving tool so that the driving tool drives the driving cylinder to press the second elastic body, so that the second elastic body seals against the oil pipe.

[0017] Optionally, the connecting unit further includes a fourth breakable pin, the two ends of which are fixedly connected to the connecting cylinder and the driving cylinder, respectively.

[0018] Optionally, the tubing sealing and packing device further includes two fifth breakable pins, one end of which is fixedly connected to the central tube body, and the other end of which is fixedly connected to the second connecting cylinder and the driving cylinder, respectively.

[0019] Optionally, the tubing plugging and sealing device further includes a backstop, which is sleeved on the central tube body and located inside the connecting unit. The connecting unit and the central tube body are provided with opposing first backstop helical teeth, the inclination directions of the first backstop helical teeth of the connecting unit and the central tube body are opposite. The backstop is provided with second backstop helical teeth on both sides, and the second backstop helical teeth mesh with the first backstop helical teeth.

[0020] Compared with the prior art, the beneficial effects of the oil pipe plugging and sealing device provided by the present invention include: by setting a central tube body, an anchoring unit, a plugging unit, and a connecting unit, when plugging the damaged part of the oil pipe, the oil pipe plugging and sealing device can be inserted into the damaged part inside the oil pipe through the central tube body. The anchoring unit is fixedly connected to the central tube body, and the plugging and sealing device is anchored inside the oil pipe through snap-fit ​​with the oil pipe. The plugging unit is provided with a first elastic body and a second elastic body, which are sleeved on the central tube body. The first elastic body and the second elastic body are located at the center. After the pipe body is inserted into one side of the damaged part of the oil pipe, it can be positioned on both sides of the damaged part of the oil pipe. The connecting unit is slidably connected to the central pipe body. The connecting unit can be connected to the driving tool. The driving tool drives the connecting unit to slide, so that the connecting unit presses the first elastic body and the second elastic body, and makes the first elastic body and the second elastic body seal against the oil pipe. This can seal both sides of the damaged part of the oil pipe, which can avoid the damaged part of the oil pipe from causing inconvenience to the oil production operation. The damaged part of the oil pipe can be repaired without removing the oil pipe, effectively reducing the difficulty and cost of repairing the damaged part of the oil pipe. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the oil pipe plugging and sealing device provided in an embodiment of the present invention.

[0022] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0023] Figure 3 for Figure 1 A magnified view of a section at point B in the middle.

[0024] Figure 4 for Figure 1 A magnified view of a section at point C.

[0025] The following are the labeling elements in the figure:

[0026] 10—Center tube body 11—Upper center tube 12—Lower center tube

[0027] 13—Sealing ring; 14—Unsealing drive component; 15—Retaining ring

[0028] 16—First anti-reverse helical tooth; 20—Anchoring unit; 21—Cladle

[0029] 22—Third breakable pin; 30—Sealing unit; 31—First elastic body

[0030] 32—Second elastic body; 40—Connecting unit; 41—First connecting cylinder

[0031] 42—Second connecting cylinder; 43—Drive cylinder; 44—Fourth breakable pin

[0032] 50—Anchoring drive component; 60—First breakable pin; 70—Second breakable pin

[0033] 80—Fifth breakable pin; 90—Anti-reverse component; 91—Second anti-reverse helical tooth. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] This invention provides a tubing plugging and sealing device, such as... Figure 1 As shown, the device includes a central tube 10, an anchoring unit 20, a sealing unit 30, and a connecting unit 40. The central tube 10 is inserted into the oil pipe. The anchoring unit 20 is fixedly connected to the central tube 10 and is used to clamp the oil pipe. The sealing unit 30 includes a first elastic body 31 and a second elastic body 32. The first elastic body 31 and the second elastic body 32 can be inserted into the oil pipe through the central tube 10 and are located on both sides of the damaged part of the oil pipe. The connecting unit 40 is slidably connected to the central tube 10 and is used for connection to a driving tool. The driving tool is used to press the first elastic body 31 and the second elastic body 32 to seal and fit the oil pipe.

[0036] Specifically, by setting up a central tube body 10, an anchoring unit 20, a sealing unit 30, and a connecting unit 40, when sealing the damaged part of the oil pipe, the oil pipe sealing and packing device can be inserted into the damaged part of the oil pipe through the central tube body 10. The anchoring unit 20 is fixedly connected to the central tube body 10, and the sealing and packing device is anchored inside the oil pipe through a snap-fit ​​connection. The sealing unit 30 is equipped with a first elastic body 31 and a second elastic body 32. After the central tube body 10 is inserted into the damaged part of the oil pipe, the first elastic body 31 and the second elastic body 32 can... The connecting units 40 are slidably connected to the central pipe body 10 on both sides of the damaged section of the oil pipe. The connecting units 40 can be connected to the driving tool. The driving tool drives the connecting units 40 to slide, so that the connecting units 40 press the first elastic body 31 and the second elastic body 32, and make the first elastic body 31 and the second elastic body 32 seal against the oil pipe. This can seal both sides of the damaged section of the oil pipe, avoid the damaged section of the oil pipe from causing inconvenience to the oil production work, and achieve the repair of the damaged section of the oil pipe without removing the oil pipe, effectively reducing the difficulty and cost of repairing the damaged section of the oil pipe.

[0037] In this embodiment, damage to the oil pipe includes rupture, breakage, narrowing, bending, etc.

[0038] In this embodiment, the driving tool is a sealing tool.

[0039] Understandably, the driving tool is not limited to a setting tool, but can also be a person or other driving equipment, as long as it can push the connecting unit 40 to move along the axial direction of the central tube 10. The connecting unit 40 can move relative to the central tube 10 under the push of other tools, so that the first elastic body 31 and the second elastic body 32 seal and fit the oil pipe.

[0040] Understandably, the central tube 10 can be a single tube or a combination of multiple tubes.

[0041] In this embodiment, as Figures 1-4 As shown, the central tube body 10 includes an upper central tube 11, a lower central tube 12 and a sealing ring 13. The upper central tube 11 and the lower central tube 12 are threadedly connected, and the sealing ring 13 is installed between the upper central tube 11 and the lower central tube 12.

[0042] In this embodiment, as Figure 1 As shown, the first elastic body 31 and the second elastic body 32 are located on both sides of the anchoring unit 20. The distance between the first elastic body 31 and the second elastic body 32 can be adaptively adjusted according to the length of the damaged part of the pipeline, thereby enabling the repair of damaged parts of oil pipes with large spans. To facilitate the installation of the first elastic body 31 and the second elastic body 32, the first elastic body 31 and the second elastic body 32 are respectively sleeved on the upper central tube 11 and the lower central tube 12.

[0043] In this embodiment, the first elastic body 31 and the second elastic body 32 are rubber sleeves. The connecting unit 40 squeezes the first elastic body 31 and the second elastic body 32 under the drive of the driving tool, so that the first elastic body 31 and the second elastic body 32 expand radially. After expanding to a certain extent, they fit against the side wall of the oil pipe.

[0044] In this embodiment, as Figure 1 and 3 As shown, the oil pipe sealing and sealing device also includes an anchoring drive 50, which is slidably connected to the central pipe body 10 and located between the first elastic body 31 and the anchoring unit 20. The anchoring drive 50 can drive the anchoring unit 20 to engage the oil pipe by pressing the first elastic body 31.

[0045] Specifically, after the sealing device is lowered to the anchoring position of the oil pipe, the connecting unit 40 applies a certain pressing force to the first elastic body 31 through the driving tool, causing the first elastic body 31 to drive the anchoring drive member 50 to move. The anchoring drive member 50, through its movement, can drive the anchoring unit 20 to move and engage with the oil pipe, thereby achieving the anchoring of the anchoring unit 20 to the oil pipe. With the setting of the anchoring drive member 50, the anchoring unit 20 only needs to be driven by the driving tool to achieve the anchoring of the first elastic body 31 to the oil pipe, without the need to use an additional anchoring tool to anchor the sealing device, thus facilitating the anchoring of the sealing device and the oil pipe.

[0046] In this embodiment, as Figures 1-2 As shown, the connecting unit 40 includes a first connecting cylinder 41, which is slidably connected to the outside of the central tube 10 and located on the side of the first elastic body 31 away from the anchoring drive member 50. The first connecting cylinder 41 is used for connecting a driving tool to press the first elastic body 31 toward the anchoring drive member 50, causing the first elastic body 31 to expand radially and press the anchoring drive member 50. Specifically, during the setting of the first elastic body 31, the first connecting cylinder 41 can be connected by a driving tool and driven to slide axially toward the first elastic body 31, thereby causing the first connecting cylinder 41 to press the first elastic body 31, deforming the first elastic body 31 and pressing the anchoring drive member 50, so as to provide an axial force to the anchoring drive member 50 to move toward the anchoring unit 20.

[0047] In this embodiment, as Figures 1-2 As shown, the oil pipe sealing and sealing device also includes a first breakable pin 60, the two ends of which are fixed to the first connecting cylinder 41 and the central tube 10, respectively.

[0048] Specifically, the first breakable pin 60 can restrict the sliding of the first connecting cylinder 41 relative to the central tube 10. When driving the first connecting cylinder 41, the driving tool provides the first connecting cylinder 41 with a driving force to move the first connecting cylinder 41 axially, causing the breakable pin to break. Then, by driving the first connecting cylinder 41 to slide, the first elastic body 31 is pressed. Through the setting of the first breakable pin 60, the driving tool can store force and increase the pressing force of the driving tool on the first connecting cylinder 41, thereby increasing the pressing force of the first connecting cylinder 41 on the first elastic body 31, which facilitates the deformation of the first elastic body 31. At the same time, it can generate a reaction force on the driving tool, so that the driving tool generates a driving force to drive the deformation of the second elastic body 32, thereby facilitating the setting of the second elastic body 32 on the oil pipe.

[0049] In this embodiment, as Figure 1 and 3 As shown, the tubing plugging and sealing device also includes a second breakable pin 70, the two ends of which are fixed to the anchoring drive 50 and the central tube 10, respectively.

[0050] Specifically, the second breakable pin 70 restricts the movement of the anchoring drive member 50 relative to the central tube 10. During the anchoring of the anchoring unit 20, the first elastic body 31 presses against the anchoring drive member 50 under the drive of the first connecting cylinder 41, and the second breakable pin 70 breaks under the driving force of the first elastic body 31. This causes the first elastic body 31 to drive the anchoring drive member 50 toward the anchoring unit 20, thus anchoring the anchoring unit 20 to the oil pipe. By setting the second breakable pin 70, the driving force of the first connecting cylinder on the first elastic body 31 can be further increased, thereby facilitating the first elastic body 31 to be seated in the oil pipe. At the same time, the force of the first elastic body 31 on the anchoring drive member 50 is increased, thereby facilitating the driving of the anchoring drive member on the anchoring unit 20.

[0051] In this embodiment, as Figure 1 and 3 As shown, the anchoring unit 20 includes a slip 21 and a third breakable pin 22. The slip 21 is sleeved on the central tube 10 and located on the side of the anchoring drive 50 away from the first elastic body 31. The two ends of the third breakable pin 22 are fixed to the slip 21 and the central tube 10 respectively. The anchoring drive 50 can drive the slip 21 to expand and engage the oil pipe by moving towards the slip 21.

[0052] Specifically, during the anchoring operation of the single-transport anchor, the anchoring drive body moves towards the square shape of the slip 21 under the drive of the first elastic body 31, causing the slip 21 to expand and engage with the oil pipe, thus anchoring the slip 21 to the oil pipe. The third breakable pin 22 can fix the slip 21 to the central tube 10. At the same time, through the setting of the third breakable pin 22, when disassembling the cadmium sealing device, it is only necessary to use an external retrieval tool to act on the central tube 10, causing the central tube 10 to drive the third breakable pin 22 to break, so that the slip 21 is separated from the central tube 10, and then the central tube 10 can be retrieved, which facilitates the disassembly and assembly of the cadmium sealing device.

[0053] In this embodiment, further, as Figure 1 and 4 As shown, a release drive 14 is also fixed on the surface of the central tube 10. The release drive 14 is located inside the slip 21. The release drive 14 is used to abut against the end of the anchoring drive body by the drive of the central tube 10, and drive the anchoring drive body to move away from the slip 21, so as to disengage the slip 21 from the oil pipe, thereby realizing the release of the cadmium sealing device from the oil pipe.

[0054] In this embodiment, as Figure 1 and 4 As shown, the connecting unit 40 also includes a second connecting cylinder 42 and a driving cylinder 43. The second connecting cylinder 42 is slidably connected to the inner side of the central tube 10. One end of the driving cylinder 43 is fixed to the second connecting cylinder 42, and the other end of the driving cylinder 43 is slidably connected to the outer side of the central tube 10 and extends to one side of the second elastic body 32. The second connecting cylinder 42 is used for connecting a driving tool so that the driving tool drives the driving cylinder 43 to press the second elastic body 32, making the second elastic body 32 seal against the oil pipe. Specifically, when setting the second elastic body 32, the driving tool connects to the second connecting cylinder 42 and pulls the second connecting cylinder 42, causing the second connecting cylinder 42 to slide upward, thereby causing the driving cylinder 43 to slide and drive the second elastic body 32 to deform, thus achieving the setting of the second elastic body 32.

[0055] In this embodiment, further, as Figure 1 As shown, a retaining ring 15 is sleeved on the surface of the central tube 10. The retaining ring 15 is located on the side of the second elastic body 32 away from the driving cylinder 43. The retaining ring 15 can limit the second elastic body 32, making it convenient for the driving cylinder 43 to press the second elastic body 32.

[0056] In this embodiment, when the first elastic body 31 and the second elastic body 32 are set, the driving tool is simultaneously connected to the first connecting cylinder 41 and the second connecting cylinder 42. When the first connecting cylinder 41 is driven, the first connecting cylinder 41 generates a reaction force acting on the driving tool, which causes the driving tool to generate an upward pulling force acting on the second connecting cylinder, causing the second connecting cylinder 42 to generate a driving force acting on the driving cylinder 43, which causes the driving cylinder 43 to drive the second elastic body 32 to deform.

[0057] In this embodiment, as Figure 1 and 4 As shown, the connecting unit 40 also includes a fourth breakable pin 44, the two ends of which are fixedly connected to the connecting cylinder and the driving cylinder 43, respectively. Specifically, the fourth breakable pin 44 can fix the second connecting cylinder 42 and the driving cylinder 43. At the same time, by setting the fourth breakable pin 44, when the driving force of the driving cylinder 43 on the second elastic body 32 reaches a certain value, the fourth breakable pin 44 breaks. Then, by controlling the ultimate stress of the fourth breakable pin 44, the pressing force of the driving cylinder 43 on the second elastic body 32 can be controlled, so as to achieve stable setting of the second elastic body 32 on the oil pipe and prevent structural damage to the second elastic body 32.

[0058] In this embodiment, as Figures 1-2 As shown, the tubing sealing and packing device also includes two fifth breakable pins 80. One end of each fifth breakable pin 80 is fixedly connected to the central tube body 10, and the other end is fixedly connected to the second connecting cylinder 42 and the driving cylinder 43, respectively. Specifically, the driving tool generates an upward pulling force acting on the second connecting cylinder 42, causing the two fifth breakable pins 80 to break. Then, it drives the second connecting cylinder 42 and the driving cylinder 43 to slide, causing the driving cylinder 43 to press the second elastic body 32. The two fifth breakable pins 80 can fix the second connecting cylinder 42 and the driving cylinder 43 to the central tube body 10. At the same time, the driving tool can increase the pressure of the driving cylinder 43 acting on the second elastic body 32 by storing force, which facilitates the deformation of the second elastic body 32.

[0059] In this embodiment, after the fifth breakable pin 80 and the fourth breakable pin 44 break in sequence, the second connecting cylinder 42 detaches from the central tube 10, exposing the central tube 10, which facilitates the connection of the central tube 10 when the retrieval tool is used for retrieval, and provides convenience for the disassembly and assembly of the cadmium sealing device.

[0060] In this embodiment, as Figure 1 and 4As shown, the oil pipe sealing and packing device also includes a backstop 90, which is sleeved on the central tube body 10 and located inside the connecting unit 40. The connecting unit 40 and the central tube body 10 are provided with opposing first backstop helical teeth 16, and second backstop helical teeth 91 are provided on both sides of the backstop 90. The second backstop helical teeth 91 mesh with the first backstop helical teeth 16. Specifically, by setting the backstop 90, the first elastic body 31 and the second elastic body 32 can be prevented from deforming and driving the connecting unit 40 to retract under their own elastic force, thus preventing the first elastic body 31 and the second elastic body 32 from resetting.

[0061] In this embodiment, further, as Figures 1-2 As shown in Figure 4, the first anti-reverse helical tooth 16 of the connecting unit 40 and the central tube 10 are tilted in opposite directions.

[0062] In this embodiment, further, as Figures 1-2 As shown in Figure 4, there are two anti-return components 90. One anti-return component 90 is located between the first connecting cylinder 41 and the central tube 10, and the other anti-return component 90 is located between the driving cylinder 43 and the central tube 10. The two anti-return components 90 are used to prevent the driving cylinder 43 and the first connecting cylinder 41 from resetting. At the same time, by setting the anti-return component 90, the central tube 10 can move upward relative to the anti-return component 90 under the retrieval of the retrieval tool, and the first connecting cylinder 41 can move upward relative to the anti-return component 90 under the driving force of the unsealing driving component 14 on the cadmium sealing driving component, thereby facilitating the unsealing of the cadmium sealing device.

[0063] The specific working principle of this invention is as follows: When repairing the damaged part of the oil pipe, the connecting sealing tool for the first connecting cylinder 41 and the second connecting cylinder 42 is used to lower the sealing device to one side of the damaged part of the oil pipe, and the slip 21 is pre-fixed to the inner wall of the oil pipe. At the same time, the first elastic body 31 and the second elastic body 32 are positioned on both sides of the damaged part of the oil pipe. The sealing tool provides a driving force for the axial movement of the first connecting cylinder 41, causing the breakable pin to break. Then, by driving the first connecting cylinder 41 to slide, the first elastic body 31 is pressed, causing the first elastic body 31 to deform. When the pressing force of the first connecting cylinder 41 on the first elastic body 31 reaches a certain value, the second breakable pin 70 is detonated under the driving force of the first elastic body 31. The breakage causes the first elastic body 31 to move the anchoring drive 50 toward the anchoring unit 20, anchoring the anchoring unit 20 to the oil pipe and stabilizing the sealing device. At the same time, the setting tool generates a pulling force on the second connecting cylinder 42 under the reaction force of the first connecting cylinder 41. When the pulling force of the second connecting cylinder 42 reaches a certain value, the two fifth breakable pins 80 break. The setting tool further drives the second connecting cylinder 42 and the drive cylinder 43 to slide, causing the drive cylinder 43 to press the second elastic body 32, thus setting the second elastic body 32 to the oil pipe. When the driving force of the second connecting cylinder 42 on the drive cylinder 43 reaches a certain value, the fourth breakable pin 44 breaks, and the second connecting cylinder 42 detaches from the central tube body 10, thus repairing the damaged part of the oil pipe with the sealing device.

[0064] When disassembling the oil pipe, lower the retrieval tool and connect it to the central pipe body 10. Pull the central pipe body 10, and the central pipe body 10 will move upward against the force of the anti-reverse component 90. This will cause the unsealing drive component 14 to abut against the end of the anchoring drive body, and drive the anchoring drive body to move away from the slip 21 to disengage from the slip 21. This will disengage the slip 21 from the oil pipe, thereby unsealing the cadmium sealing device from the oil pipe. Finally, the cadmium sealing device can be retrieved using the retrieval tool.

[0065] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A pipe sealing and packing device, characterized in that, include: A central tube body, which is used to be inserted into an oil pipe; An anchoring unit, which is fixedly connected to the central tube body, is used to clamp the oil pipe; A plugging unit, comprising a first elastic body and a second elastic body, both the first elastic body and the second elastic body being sleeved on the central tube body, and the first elastic body and the second elastic body being inserted into the oil pipe through the central tube body and positioned on both sides of the damaged part of the oil pipe; A connecting unit is slidably connected to the central tube body. The connecting unit is used for connection to a driving tool so that, driven by the driving tool, the first elastic body and the second elastic body are pressed to seal and fit the oil pipe. The connecting unit includes a first connecting cylinder, which is slidably connected to the outside of the central tube and located on the side of the first elastic body away from the anchoring drive member. The first connecting cylinder is used for connection to the driving tool, so as to press the first elastic body in the direction of the anchoring drive member by the driving tool, so that the first elastic body expands radially and presses the anchoring drive member. It also includes an anchoring drive component, which is slidably connected to the central tube body and located between the first elastic body and the anchoring unit. The anchoring drive component can drive the anchoring unit to engage with the oil pipe by pressing the first elastic body. The connecting unit further includes a second connecting cylinder and a driving cylinder. The second connecting cylinder is slidably connected to the inner side of the central tube body. One end of the driving cylinder is fixed to the second connecting cylinder, and the other end of the driving cylinder is slidably connected to the outer side of the central tube body and extends to one side of the second elastic body. The second connecting cylinder is used for connection to the driving tool so that the driving tool drives the driving cylinder to press the second elastic body, so that the second elastic body seals and fits the oil pipe. During the setting of the first and second elastomers, the driving tool connects the first and second connecting cylinders simultaneously. When the first connecting cylinder is driven, it generates a reaction force that acts on the driving tool, causing the driving tool to generate an upward pulling force that acts on the second connecting cylinder. This causes the second connecting cylinder to generate a driving force that acts on the driving cylinder, causing the driving cylinder to drive the second elastomer to deform.

2. The oil pipe plugging and sealing device according to claim 1, characterized in that, It also includes a first breakable pin, the two ends of which are fixed to the first connecting cylinder and the central tube, respectively.

3. The oil pipe plugging and sealing device according to claim 1, characterized in that, It also includes a second breakable pin, the two ends of which are fixed to the anchoring drive and the central tube, respectively.

4. The oil pipe plugging and sealing device according to claim 1, characterized in that, The anchoring unit includes a slip and a third breakable pin. The slip is sleeved on the central tube and located on the side of the anchoring drive member away from the first elastic body. The two ends of the third breakable pin are respectively fixed to the slip and the central tube. The anchoring drive member can drive the slip to expand and engage the oil pipe by moving towards the slip.

5. The oil pipe plugging and sealing device according to claim 4, characterized in that, The connecting unit further includes a fourth breakable pin, the two ends of which are fixedly connected to the second connecting cylinder and the driving cylinder, respectively.

6. The tubing plugging and sealing device according to claim 4, characterized in that, It also includes two fifth breakable pins, one end of which is fixedly connected to the central tube body, and the other end of which is fixedly connected to the second connecting cylinder and the driving cylinder, respectively.

7. The tubing plugging and sealing device according to any one of claims 1 to 4, characterized in that, It also includes a backstop component, which is sleeved on the central tube and located inside the connecting unit. The connecting unit and the central tube are provided with opposing first backstop helical teeth. The inclination directions of the first backstop helical teeth of the connecting unit and the central tube are opposite. The backstop component is provided with second backstop helical teeth on both sides, and the second backstop helical teeth mesh with the first backstop helical teeth.

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