An ultra-d-shaped passive packoff device

Abstract

The utility model discloses a kind of super-large D passive packer, including positioning cylinder, the bottom side of the positioning cylinder is provided with annular limit seat, sealing element is provided on the limit seat, protective cylinder is sleeved outside the sealing element, the one end of the positioning cylinder away from the limit seat is provided with limit cylinder, two first rotating shafts are symmetrically provided on the limit cylinder, the limit cylinder is rotatably connected with the first rotating shaft, thread groove is opened in the positioning cylinder, thread is opened in the outside of the first rotating shaft, the first rotating shaft is screw thread connected with the thread groove, transmission assembly for controlling the rotation of the first rotating shaft is provided on the limit cylinder.In the application, when packer is put into or taken out pipeline, protective cylinder will cover sealing element, so it can effectively prevent excessive wear of sealing element, when packer is placed in place, protective cylinder will move upwards along positioning cylinder, and sealing element is exposed, so the service life of packer is improved.

Description

Technical Field

[0001] This utility model relates to the field of sealing device technology, and in particular to an ultra-large D-type passive sealing device. Background Technology

[0002] Packers are critical tools in oil and gas well engineering for operations such as section isolation, fracturing, water injection, and testing; their reliability directly determines the success or failure of these operations. The sealing function of a packer mainly relies on a sealing element made of elastic materials (such as hydrogenated nitrile rubber). When a packer is run into the wellbore, it needs to pass through thousands of meters of casing. During this process, the outer surface of the rubber ring continuously rubs and scrapes against the inner wall of the casing, which may lead to excessive wear of the rubber ring and reduce the service life of the packer. Summary of the Invention

[0003] The purpose of this utility model is to provide an ultra-large D-type passive sealing device in order to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An extra-large D-type passive packer includes a positioning cylinder, an annular limiting seat on the bottom side of the positioning cylinder, a sealing element on the limiting seat, a protective cylinder sleeved on the outside of the sealing element, a limiting sleeve at the end of the positioning cylinder away from the limiting seat, two first rotating shafts symmetrically arranged on the limiting sleeve, the limiting sleeve and the first rotating shafts being rotatably connected, a threaded groove on the positioning cylinder, and threads on the outside of the first rotating shafts, the first rotating shafts being threadedly connected to the threaded groove, and a transmission component for controlling the rotation of the first rotating shafts on the limiting sleeve.

[0005] Preferably, the transmission assembly includes a second transmission ring, which is rotatably connected to the upper end face of the limiting cylinder. A drive gear is provided on the outer side of the second transmission ring, and a driven gear is provided on the top of the first rotating shaft. The driven gear and the drive gear are meshed together. Multiple transmission grooves are provided inside the second transmission ring.

[0006] Preferably, the top of the limiting cylinder is provided with a limiting ring, and both the limiting ring and the limiting seat are provided with multiple arc-shaped grooves on their sides, and ball bearings are movably connected in each of the arc-shaped grooves.

[0007] Preferably, a first transmission ring is sleeved on the outer side of the positioning cylinder, and an annular protrusion is provided on the bottom side of the first transmission ring. The first rotating shaft passes through the annular protrusion, and the first rotating shaft and the annular protrusion are threadedly connected.

[0008] Preferably, a plurality of positioning seats are evenly distributed on the side of the positioning cylinder, a positioning plate is provided on the inner side of the positioning seat, one end of the positioning plate is rotatably connected to the positioning seat, a second spring is provided between the positioning plate and the side of the positioning cylinder, the top side of the first transmission ring abuts against the positioning plate, and a plurality of positioning teeth are evenly distributed on the outer side of the positioning plate.

[0009] Preferably, the bottom of the limiting cylinder has a plurality of first through holes evenly distributed therein, a transmission rod is slidably connected in the first through hole, and a squeezing plate is fixedly connected to the bottom of the transmission rod. The inner side of the positioning cylinder has a plurality of liquid inlet channels, each of which corresponds to one of the first through holes and is interconnected with the first through holes.

[0010] Preferably, a transmission piston is provided at the top of the transmission rod, the transmission piston and the transmission rod are slidably connected, a limiting groove is formed in the first through hole, a reset plate is provided on the outside of the transmission rod, and a first spring is provided between the reset plate and the bottom of the limiting groove.

[0011] Preferably, the plurality of first through holes are distributed in a ring with equal spacing about the positioning cylinder, and the plurality of positioning seats are distributed in a ring with equal spacing about the positioning cylinder.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: In this application, when the packer is placed into or removed from the pipeline, the protective sleeve will cover the seal, which can effectively prevent excessive wear of the seal. After the packer is installed, the protective sleeve will move up along the positioning sleeve to expose the seal, thus improving the service life of the packer. Attached Figure Description

[0013] Figure 1 A schematic diagram of the sealing device structure provided according to an embodiment of the present invention is shown; Figure 2 A cross-sectional structural schematic diagram of the sealing device provided according to an embodiment of the present invention is shown; Figure 3 A schematic cross-sectional view of the limiting cylinder provided according to an embodiment of the present utility model is shown; Figure 4 A schematic diagram of the cross-sectional structure of the protective cylinder according to an embodiment of the present invention is shown; Figure 5 A bottom view of the first transmission ring structure according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of the second transmission ring structure provided according to an embodiment of the present invention is shown; Figure 7A schematic diagram of the transmission groove distribution structure provided according to an embodiment of the present invention is shown.

[0014] Legend: 1. Positioning cylinder; 2. Limiting seat; 3. Seal; 4. Extrusion plate; 5. Limiting cylinder; 6. Limiting ring; 7. Ball bearing; 8. First through hole; 9. Limiting groove; 10. Transmission rod; 11. Transmission piston; 12. Reset plate; 13. First spring; 14. Liquid inlet channel; 15. Protective cylinder; 16. Threaded groove; 17. First rotating shaft; 18. First transmission ring; 19. Annular protrusion; 20. Positioning seat; 21. Positioning plate; 22. Second spring; 23. Positioning tooth; 24. Driven gear; 25. Second transmission ring; 26. Drive gear; 27. Transmission groove. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-7 This utility model provides a technical solution: An extra-large D-type passive packer includes a positioning cylinder 1, an annular limiting seat 2 on the bottom side of the positioning cylinder 1, a sealing element 3 on the limiting seat 2, a protective cylinder 15 sleeved on the outside of the sealing element 3, a limiting cylinder 5 at the end of the positioning cylinder 1 away from the limiting seat 2, two first rotating shafts 17 symmetrically arranged on the limiting cylinder 5, the limiting cylinder 5 and the first rotating shafts 17 being rotatably connected, a threaded groove 16 on the positioning cylinder 1, and a thread on the outside of the first rotating shafts 17, the first rotating shafts 17 and the threaded groove 16 being threadedly connected, a transmission component for controlling the rotation of the first rotating shafts 17 is provided on the limiting cylinder 5; the sealing element 3 is a rubber product and can deform, when the sealing element 3 deforms, the sealing element 3 will fill the pipe, completing the sealing of the pipe, under normal conditions, the protective cylinder 15 covers the sealing element 3 to prevent the sealing element 3 from contacting the inner wall of the pipe and causing wear, the first rotating shafts 17 drive the protective cylinder 15 to move up and down along the positioning cylinder 1, thereby protecting the sealing element 3; D represents the model of the packer.

[0017] Specifically, such as Figure 2 , Figure 6 and Figure 7As shown, the transmission assembly includes a second transmission ring 25, which is rotatably connected to the upper end face of the limiting cylinder 5. A drive gear 26 is provided on the outer side of the second transmission ring 25, and a driven gear 24 is provided on the top of the first rotating shaft 17. The driven gear 24 and the drive gear 26 are meshed together. Multiple transmission grooves 27 are provided inside the second transmission ring 25. A limiting ring 6 is provided on the top of the limiting cylinder 5. Multiple arc-shaped grooves are provided on the sides of the limiting ring 6 and the limiting seat 2. Ball bearings 7 are movably connected in the arc-shaped grooves. The transmission grooves 27 are used to engage with the anchor. The anchor can drive the drive gear 26 to rotate, and the drive gear 26 can drive the two driven gears 24 to rotate synchronously. The ball bearings 7 contact the inside of the pipe, which can effectively reduce the friction between the sealing device and the pipe and reduce the risk of the sealing device being stuck.

[0018] Specifically, such as Figure 4 and Figure 5 As shown, a first transmission ring 18 is sleeved on the outer side of the positioning cylinder 1. An annular protrusion 19 is provided on the bottom side of the first transmission ring 18. A first rotating shaft 17 passes through the annular protrusion 19 and is threadedly connected to the annular protrusion 19. Multiple positioning seats 20 are evenly distributed on the side of the positioning cylinder 1. A positioning plate 21 is provided on the inner side of the positioning seat 20. One end of the positioning plate 21 is rotatably connected to the positioning seat 20. A second spring 22 is provided between the positioning plate 21 and the side of the positioning cylinder 1. The top side of the first transmission ring 18 abuts against the positioning plate 21. Multiple positioning teeth 23 are evenly distributed on the outer side of the positioning plate 21. The first rotating shaft 17 drives the first transmission ring 18 to move up and down along the positioning cylinder 1. When the first transmission ring 18 moves upward, it can open the positioning plate 21, compress the second spring 22, and make the positioning teeth 23 fit against the inner wall of the pipe, thus achieving the setting of the sealing device. When the first transmission ring 18 moves downward, under the action of the second spring 22, the positioning plate 21 separates from the inner wall of the pipe, thus achieving the unsealing of the sealing device.

[0019] Specifically, such as Figure 2 and Figure 3As shown, the bottom of the limiting cylinder 5 has multiple first through holes 8 evenly distributed. A transmission rod 10 is slidably connected inside the first through hole 8. A squeezing plate 4 is fixedly connected to the bottom of the transmission rod 10. Multiple liquid inlet channels 14 are opened on the inner side of the positioning cylinder 1. The liquid inlet channels 14 correspond one-to-one with the first through holes 8 and are interconnected. A transmission piston 11 is provided at the top of the transmission rod 10. The transmission piston 11 and the transmission rod 10 are slidably connected. A limiting groove 9 is opened inside the first through hole 8. A reset plate 12 is provided on the outer side of the transmission rod 10. A first spring 13 is provided between the bottom of the reset plate 12 and the limiting groove 9. The multiple first through holes 8 are distributed in a ring with equal spacing about the positioning cylinder 1. The multiple positioning seats 20 are also distributed in a ring with equal spacing about the positioning cylinder 1. The opening direction of the liquid inlet channel 14 is funnel-shaped, which can increase the flow rate of the liquid and thus increase the pressure of the liquid on the transmission piston 11. The multiple first through holes 8 are distributed in a ring with equal spacing about the positioning cylinder 1, so that the squeezing plate 4 is subjected to uniform force, which can improve the service life of the sealing device.

[0020] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A super-large D-type passive containment device, comprising a positioning cylinder (1), characterized in that, The bottom side of the positioning cylinder (1) is provided with an annular limiting seat (2), the limiting seat (2) is provided with a sealing element (3), the outer side of the sealing element (3) is provided with a protective cylinder (15), the end of the positioning cylinder (1) away from the limiting seat (2) is provided with a limiting cylinder (5), the limiting cylinder (5) is symmetrically provided with two first rotating shafts (17), the limiting cylinder (5) and the first rotating shafts (17) are rotatably connected, the positioning cylinder (1) is provided with a threaded groove (16), the outer side of the first rotating shaft (17) is provided with a thread, the first rotating shaft (17) and the threaded groove (16) are threadedly connected, the limiting cylinder (5) is provided with a transmission component for controlling the rotation of the first rotating shaft (17).

2. The ultra-large D-type passive containment device according to claim 1, characterized in that, The transmission assembly includes a second transmission ring (25), which is rotatably connected to the upper end face of the limiting cylinder (5). A drive gear (26) is provided on the outer side of the second transmission ring (25), and a driven gear (24) is provided on the top of the first rotating shaft (17). The driven gear (24) and the drive gear (26) are meshed together. Multiple transmission grooves (27) are provided inside the second transmission ring (25).

3. The ultra-large D-type passive containment device according to claim 2, characterized in that, The top of the limiting cylinder (5) is provided with a limiting ring (6), and the sides of the limiting ring (6) and the limiting seat (2) are provided with multiple arc-shaped grooves, and ball bearings (7) are movably connected in the arc-shaped grooves.

4. The ultra-large D-type passive containment device according to claim 2, characterized in that, The outer side of the positioning cylinder (1) is fitted with a first transmission ring (18), and the bottom side of the first transmission ring (18) is provided with an annular protrusion (19). The first rotating shaft (17) passes through the annular protrusion (19), and the first rotating shaft (17) and the annular protrusion (19) are threadedly connected.

5. The ultra-large D-type passive containment device according to claim 4, characterized in that, The positioning cylinder (1) has multiple positioning seats (20) evenly distributed on its side. A positioning plate (21) is provided on the inner side of the positioning seat (20). One end of the positioning plate (21) is rotatably connected to the positioning seat (20). A second spring (22) is provided between the positioning plate (21) and the side of the positioning cylinder (1). The top side of the first transmission ring (18) abuts against the positioning plate (21). Multiple positioning teeth (23) are evenly distributed on the outer side of the positioning plate (21).

6. The ultra-large D-type passive containment device according to claim 5, characterized in that, The bottom of the limiting cylinder (5) is evenly distributed with a plurality of first through holes (8), and a transmission rod (10) is slidably connected in the first through hole (8). The bottom of the transmission rod (10) is fixedly connected with a squeezing plate (4). The inner side of the positioning cylinder (1) is provided with a plurality of liquid inlet channels (14), and the liquid inlet channels (14) correspond one-to-one with the first through holes (8). The liquid inlet channels (14) and the first through holes (8) are interconnected.

7. The ultra-large D-type passive containment device according to claim 6, characterized in that, A transmission piston (11) is provided at the top of the transmission rod (10). The transmission piston (11) and the transmission rod (10) are slidably connected. A limiting groove (9) is provided in the first through hole (8). A reset plate (12) is provided on the outside of the transmission rod (10). A first spring (13) is provided between the bottom of the reset plate (12) and the limiting groove (9).

8. The ultra-large D-type passive containment device according to claim 7, characterized in that, The plurality of first through holes (8) are distributed in a ring at equal intervals with respect to the positioning cylinder (1), and the plurality of positioning seats (20) are distributed in a ring at equal intervals with respect to the positioning cylinder (1).

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