Wellhead sealing rubber gate

Abstract

The utility model belongs to rubber skin gate technical field especially for wellhead sealing rubber skin gate, including fixed bolster, two fixed boards, moving frame and be equipped with wellhead gate replacement device body on fixed bolster, two groups of adjusting assembly are respectively equipped with the both sides of moving frame's top, be used for adjusting the position of moving frame on fixed board, in the utility model, through design adjusting assembly, can realize the accurate regulation of wellhead sealing rubber skin gate pressure replacement process, avoided traditional device regulation complicated, the problem of insufficient precision, improved the accuracy and efficiency of replacement operation, at the same time, the reliable locking design of ratchet pawl ensures the stability of the device after adjustment, further improves the safety and reliability of operation, in addition, the stability design of connecting plate and reinforcing plate and other structures, strengthens the overall strength of the device, prevents the damage deformation of parts in the adjustment process, prolongs the service life of the device.

Description

Technical Field

[0001] This utility model belongs to the technical field of rubber gates, specifically relating to wellhead sealing rubber gates. Background Technology

[0002] In wellhead equipment in oil and gas fields, the wellhead sealing rubber gate valve is a core component for controlling oil and gas transportation. It is fixedly connected to the wellhead casing via flanges or clamps, and the casing contains tubing. The sealing function of this gate valve relies entirely on the internal rubber sealing components. After oil and gas flow out of the annulus, they enter the gate valve through the connection between the casing and the gate valve. The opening and closing of the rubber sealing components controls the flow of oil and gas. Due to the harsh working conditions at the wellhead, the rubber sealing components must withstand high-pressure oil and gas impacts, media corrosion, and wear caused by frequent opening and closing. They are prone to aging, cracking, or local damage. Once the rubber sealing components fail, it will directly lead to gate leakage and incomplete closure, which not only wastes oil and gas resources but also causes safety hazards. Therefore, it is necessary to repair or replace failed wellhead sealing rubber gate valves in a timely manner.

[0003] To avoid the drawbacks of traditional replacement methods that require depressurization and production stoppage, existing technologies (such as the Chinese utility model patent with authorization announcement number CN214303776U) disclose a "device for replacing wellhead gates under pressure". This device, through the cooperation of a screw, a sealing unit, a squeezing unit, and a fastening unit, can disassemble a damaged gate (including a wellhead sealing rubber gate) under pressure at the wellhead: first, open the opening of the damaged gate, insert the screw and seal the opening through the sealing unit, then use the squeezing unit to seal the wellhead four-way pipe opening, and after disassembling the damaged gate, temporarily support the squeezing unit through the fastening unit, and finally realize the gate replacement.

[0004] However, in the actual replacement of wellhead sealing rubber gates, this pressurized replacement device has obvious defects: in order to adapt to the installation height of wellhead four-way valves or gates of different specifications, it is necessary to adjust the position of the first fixing plate of the fixing unit in the device (the fixing unit is used to support the screw, and its height directly affects the screw's pushing accuracy); but the existing adjustment method requires rotating multiple nuts on the first connecting rod and the second connecting rod by thread, and the upper nut of the first fixing plate must be adjusted first, and then the lower nut must be adjusted. This easily leads to the nuts on the two connecting rods not being able to be horizontally aligned, and repeated adjustments are required to keep the first fixing plate horizontal. This is not only cumbersome and time-consuming, but also difficult to guarantee the adjustment accuracy, which in turn affects the stability of the screw's pushing and the sealing effect of the squeezing unit, ultimately reducing the replacement efficiency of the wellhead sealing rubber gate. To solve the above problems, this application proposes a wellhead sealing rubber gate. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a wellhead sealing rubber gate.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wellhead sealing rubber gate, comprising a fixed frame, two fixed plates, a movable frame, and a wellhead gate replacement device body disposed on the fixed frame. Two fixed plates are symmetrically arranged at the bottom of the fixed frame, and two square holes are provided on the movable frame. The movable frame is slidably connected to the two fixed plates through the square holes. Two sets of adjustment components are respectively located on the top two sides of the movable frame, used to adjust the position of the movable frame on the fixed plate.

[0007] Preferably, the adjustment assembly includes two symmetrically distributed toothed plates disposed on one side of the two fixed plates; The top of the movable frame is provided with two symmetrically distributed support plates, and a bidirectional lead screw is rotatably connected between the two support plates. The outer wall of the bidirectional lead screw is threaded with two movable plates. One side of the two movable plates is provided with a toothed plate that meshes with the toothed plate. One end of the bidirectional lead screw passes through one of the support plates and is connected to a handwheel. A pair of fixed rods are provided between the two support plates, and the movable plate is slidably connected to the fixed rods through a through hole.

[0008] Preferably, a scale is provided on one side of both toothed plates.

[0009] Preferably, the other end of the bidirectional lead screw passes through one of the support plates and is provided with a ratchet, and a pawl that cooperates with the ratchet is rotatably connected to one side of the support plate.

[0010] Preferably, a magnet is provided on one side of the support plate above the pawl.

[0011] Preferably, a connecting plate is provided between the two fixed plates below the movable frame.

[0012] Preferably, both the fixed frame and the movable frame have two pairs of reinforcing plates at their bottom, with one side of each pair of reinforcing plates abutting against one side of each pair of toothed plates.

[0013] Compared with the prior art, the beneficial effects of this utility model are: In this invention, by designing an adjustment component, precise adjustment can be achieved during the pressurized replacement of the wellhead sealing rubber gate, avoiding the problems of cumbersome adjustment and insufficient precision of traditional devices, thus improving the accuracy and efficiency of the replacement operation. At the same time, the reliable locking design of the ratchet and pawl ensures the stability of the device after adjustment, effectively solving the problem of unstable locking, and further improving the safety and reliability of the operation. In addition, the stability design of the connecting plate and reinforcing plate enhances the overall strength of the device, prevents damage and deformation of components during the adjustment process, and extends the service life of the device.

[0014] Other additional advantages and benefits of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the installation structure of the toothed plate in this utility model; Figure 3 This is a schematic diagram of the installation structure of the fixing rod in this utility model; Figure 4 In this utility model Figure 2 A magnified structural diagram at point A; Figure 5 In this utility model Figure 3 A magnified structural diagram at point B.

[0016] In the diagram: 1. Fixed frame; 2. Main body of wellhead gate replacement device; 3. Fixed plate; 4. Connecting plate; 5. Moving frame; 6. Square hole; 7. Toothed plate; 8. Scale; 9. Reinforcing plate; 10. Support plate; 11. Two-way lead screw; 12. Moving plate; 13. Toothed plate; 14. Fixed rod; 15. Handwheel; 20. Ratchet; 21. Pad; 22. Magnet. Detailed Implementation

[0017] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0018] Please see Figures 1-5 This utility model provides the following technical solution: a wellhead sealing rubber gate, including a fixed frame 1, two fixed plates 3, a movable frame 5, and a wellhead gate replacement device body 2 mounted on the fixed frame 1. Two fixed plates 3 are symmetrically arranged at the bottom of the fixed frame 1. Two square holes 6 are opened on the movable frame 5. The movable frame 5 is slidably connected to the two fixed plates 3 through the square holes 6. Two sets of adjustment components are respectively located on the top two sides of the movable frame 5, and are used to adjust the position of the movable frame 5 on the fixed plate 3. The adjustment components include two symmetrically distributed toothed plates 7 located on one side of the two fixed plates 3. The top of the movable frame 5 is provided with two symmetrically distributed support plates 10. A bidirectional screw 11 is rotatably connected between the two support plates 10. Two movable plates 12 are threadedly connected to the outer wall of the bidirectional screw 11. A toothed plate 13 that meshes with the toothed plate 7 is provided on one side of the two movable plates 12. One end of the bidirectional screw 11 passes through one of the support plates 10 and is connected to a handwheel 15. A pair of fixed rods 14 are provided between the two support plates 10. The movable plate 12 is slidably connected to the fixed rods 14 through the through hole. A scale 8 is provided on one side of each of the two toothed plates 7. When in use, the operator first adjusts the position of the movable frame 5 according to the installation height of the wellhead sealing rubber gate to be replaced by adjusting the component: turn the handwheel 15, and the double-acting screw 11 will rotate accordingly. Since the double-acting screw 11 has a double-acting thread structure, the two movable plates 12 connected by the thread on its outer wall will move in opposite or opposite straight lines along the fixed rod 14. When the moving plate 12 drives the toothed plate 13 to mesh with the toothed plate 7 on one side of the fixed plate 3, the position of the moving frame 5 is locked; if the handwheel 15 is turned in the opposite direction, the toothed plate 13 and the toothed plate 7 are separated, and the moving frame 5 can slide up and down along the square hole 6 of the fixed plate 3. During this process, the scale 8 on one side of the toothed plate 7 can intuitively display the adjustment height, ensuring that the adjustment accuracy on both sides of the moving frame 5 is consistent, and avoiding the problem of repeated alignment of traditional nut adjustment. After the moving frame 5 is adjusted to the appropriate height, the wellhead gate replacement device body 2 (such as the existing technology which includes a screw, sealing unit, and extrusion unit for pressurized replacement) can be quickly aligned with the wellhead sealing rubber gate to be replaced through the precise positioning of the moving frame 5. Then, the pressurized replacement procedure is followed: open the valve plate of the damaged gate, insert the screw into the channel and seal the opening through the sealing unit; push the extrusion unit to seal the wellhead four-way pipe opening, remove the damaged gate and use the fastening unit to temporarily support the extrusion unit; finally, install the new wellhead sealing rubber gate set, remove the extrusion unit and screw after the replacement is completed, and close the new gate.

[0019] Preferably, by Figure 2 , Figure 3 and Figure 5As shown, in this embodiment, the other end of the bidirectional lead screw 11 passes through one of the support plates 10 and is provided with a ratchet 20. A pawl 21 that cooperates with the ratchet 20 is rotatably connected to one side of the support plate 10. A magnet 22 is provided on one side of the support plate 10 above the pawl 21. When the moving frame 5 is adjusted to the required height, the pawl 21 is tightly engaged with the ratchet 20 under the action of gravity, forming a one-way locking structure. At this time, if the bidirectional lead screw 11 has a tendency to rotate in the opposite direction due to vibration or external force, the tooth groove of the ratchet 20 will immediately lock the pawl 21 and prevent it from rotating back, thereby ensuring that the meshing state between the moving plate 12 and the toothed plate 7 is stable, and preventing the moving frame 5 from accidentally sliding due to equipment vibration or oil and gas pressure fluctuations during the pressure replacement process, further improving the reliability of the adjustment component. Using the attraction force of the magnet 22, when the bidirectional lead screw 11 needs to be rotated counterclockwise, the operator only needs to rotate the pawl 21 upwards, causing it to lift upwards around the axis of rotation of the support plate 10, releasing the one-way lock on the ratchet 20, and keeping the pawl 21 in the raised state by adhering to the bottom of the magnet 22. At this time, the bidirectional lead screw 11 can rotate freely in the opposite direction to adjust the position of the moving frame 5. After the adjustment is completed, the pawl 21 is lowered so that it re-engages into the tooth groove of the ratchet 20 under the combined action of gravity and magnetic force, forming an instant lock. This design realizes the automatic return function of the pawl 21 through the magnet 22, which not only avoids the cumbersome manual operation required by the traditional mechanical locking structure, but also ensures the stability of the pawl 21 in the non-operational state through magnetic adsorption, preventing it from falling off due to equipment vibration, and further improving the safety and ease of operation of the adjustment component.

[0020] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, a connecting plate 4 is provided between the two fixed plates 3 below the movable frame 5. When the movable frame 5 moves upward, the connecting plate 4 can play an auxiliary support role, preventing the fixed plates 3 from deforming due to gravity or external forces during long-term use. At the same time, the connecting plate 4 can also enhance the structural stability between the two fixed plates 3, ensuring that the movable frame 5 remains stable during sliding and will not cause sliding jamming or position displacement due to slight deformation of the fixed plates 3, thereby improving the stability and reliability of the entire wellhead sealing rubber gate replacement device.

[0021] Preferably, by Figure 1 , Figure 2 and Figure 3As shown, in this embodiment, both the fixed frame 1 and the movable frame 5 are provided with two pairs of reinforcing plates 9 at their bottoms. One side of each pair of reinforcing plates 9 abuts against one side of each pair of toothed plates 7. The reinforcing plates 9 enhance the strength of the contact points between the fixed frame 1 and the movable frame 5 and the toothed plates 7. When the movable frame 5 is adjusted on the toothed plates 7, a certain force is generated because the bidirectional lead screw 11 drives the movable plate 12 and the toothed plate 13 to mesh with the toothed plates 7. The reinforcing plates 9 can withstand this force, preventing the fixed frame 1 and the movable frame 5 from being damaged or deformed due to excessive force at the contact points with the toothed plates 7. This ensures the smooth progress of the adjustment process and the integrity of the entire device structure, and extends the service life of the device.

[0022] Components not described in detail in this article are existing technologies.

[0023] The working principle and usage process of this utility model are as follows: During use, the operator first adjusts the position of the movable frame 5 according to the installation height of the wellhead sealing rubber gate to be replaced: Hold the handwheel 15 and rotate it clockwise. The double-ended lead screw 11 rotates synchronously. Because the double-ended lead screw 11 has a double-threaded structure, the two movable plates 12 on its outer wall move in opposite directions along the fixed rod 14, causing the toothed plate 13 to gradually approach the toothed plate 7 on one side of the fixed plate 3. During this process, the adjustment height can be visually read through the scale 8 next to the toothed plate 7 to ensure... The adjustment accuracy on both sides of the movable frame 5 is consistent. When the toothed plate 13 and the toothed plate 7 are fully engaged, stop turning the handwheel 15. At this time, the pawl 21 automatically engages with the tooth groove of the ratchet 20 under the action of gravity, forming a one-way lock. Even if the equipment is vibrated or the oil and gas pressure fluctuates, the two-way screw 11 cannot rotate in the opposite direction. The position of the movable frame 5 is stably locked. If fine adjustment is required, the pawl 21 can be lifted up so that it is attracted to the bottom of the magnet 22. After unlocking, turn the handwheel 15 in the opposite direction. After adjustment, put down the pawl 21 to lock it again. After the mobile frame 5 is precisely positioned, the wellhead gate replacement device body 2, with the precise support of the mobile frame 5, quickly aligns with the wellhead sealing rubber gate to be replaced, and then operates according to the pressurized replacement procedure: First, open the valve plate of the damaged gate to expose the end opening; insert the screw into the channel, and seal the opening through the sealing unit fitted on the screw, and open the vent valve of the sealing unit to balance the internal and external pressure; push the extrusion unit at the end of the screw to seal the wellhead four-way pipe opening, and continue to maintain the sealing state by supporting the extrusion unit through the screw; remove the damaged gate from the four-way pipe opening (still fitted on the screw), and then fasten the openable fastening unit to the outside of the four-way pipe opening so that it supports the extrusion unit to replace the screw; separate the screw and the extrusion unit, remove the damaged gate, and fit the new wellhead sealing rubber gate on the screw, and reconnect the screw and the extrusion unit; remove the fastening unit, fix the new gate to the four-way pipe opening, remove the extrusion unit and the screw, close the new gate, and complete the pressurized replacement operation of the entire wellhead sealing rubber gate; Throughout the process, the connecting plate 4 enhances the structural stability of the two fixed plates 3, preventing jamming caused by deformation of the fixed plates 3 when the moving frame 5 slides; the reinforcing plate 9 strengthens the contact area between the fixed frame 1 and the moving frame 5 and the toothed plate 7, withstands the force during the adjustment process, and prevents damage and deformation of the components. This device, through precise adjustment of the adjustment components, reliable locking of the ratchet 20 and pawl 21, and the stability design of each structure, significantly improves the efficiency and reliability of the pressurized replacement of the wellhead sealing rubber gate, effectively solving the problems of cumbersome adjustment, insufficient precision, and unstable locking of traditional devices.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wellhead sealing rubber gate, comprising a fixed frame (1), two fixed plates (3), a movable frame (5), and a wellhead gate replacement device body (2) disposed on the fixed frame (1), characterized in that: Two fixed plates (3) are symmetrically arranged at the bottom of the fixed frame (1). Two square holes (6) are opened on the movable frame (5). The movable frame (5) is slidably connected to the two fixed plates (3) through the square holes (6). Two sets of adjustment components are respectively located on the top two sides of the movable frame (5) for adjusting the position of the movable frame (5) on the fixed plate (3); The adjustment assembly includes two symmetrically distributed toothed plates (7) located on one side of the two fixed plates (3).

2. The wellhead sealing rubber gate according to claim 1, characterized in that: The top of the movable frame (5) is provided with two symmetrically distributed support plates (10), and a bidirectional lead screw (11) is rotatably connected between the two support plates (10). The outer wall of the bidirectional lead screw (11) is threaded with two movable plates (12). One side of the two movable plates (12) is provided with a toothed plate (13) that meshes with the toothed plate (7). One end of the bidirectional lead screw (11) passes through one of the support plates (10) and is connected to a handwheel (15). A pair of fixed rods (14) are provided between the two support plates (10), and the movable plate (12) is slidably connected to the fixed rods (14) through a through hole.

3. The wellhead sealing rubber gate according to claim 2, characterized in that: A scale (8) is provided on one side of each of the two toothed plates (7).

4. The wellhead sealing rubber gate according to claim 2, characterized in that: The other end of the bidirectional lead screw (11) passes through one of the support plates (10) and is provided with a ratchet (20). A pawl (21) that cooperates with the ratchet (20) is rotatably connected to one side of the support plate (10).

5. The wellhead sealing rubber gate according to claim 4, characterized in that: A magnet (22) is provided on one side of the support plate (10) above the pawl (21).

6. The wellhead sealing rubber gate according to claim 1, characterized in that: A connecting plate (4) is provided between the two fixed plates (3) located below the movable frame (5).

7. The wellhead sealing rubber gate according to claim 2, characterized in that: The bottom of both the fixed frame (1) and the movable frame (5) is provided with two pairs of reinforcing plates (9), and one side of each pair of reinforcing plates (9) abuts against one side of each pair of toothed plates (7).

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