Tool for disassembling special metal seal for thermal recovery wellhead device

Abstract

The invention belongs to the technical field of oil exploitation, and discloses a tool for disassembling a special metal seal for a thermal recovery wellhead device, the tool comprises a plane plate, a four-way shell is arranged at the bottom end of the plane plate, the plane plate and the four-way shell are fixedly connected through a fixing nut, and the surface of the fixing nut is in threaded sleeve connection with a connecting bolt; the device moves upwards in the component metal sealing sleeve together, in the process, the rotary connecting rod and the rotary connecting block are combined to apply horizontal dispersion force to the component metal sealing sleeve, under continuous driving of the component handle, the dispersion force is converted into jacking force enabling the component metal sealing sleeve to be disassembled outwards, and the metal sealing sleeve is promoted to move upwards and be taken out; the component rotating connecting block is initially gathered by the spring ring, is stable when rotating and expanding, and automatically resets under the elastic force of the spring ring after the metal seal is taken out, so that the inner surface of the component four-way shell is prevented from being damaged or scratched when the component metal seal sleeve is taken out.

Description

Technical Field

[0001] This invention belongs to the field of petroleum extraction technology, specifically a tooling for disassembling a special metal seal for thermal wellhead equipment. Background Technology

[0002] In the field of oil extraction, thermal recovery wellhead equipment plays a crucial role, and its sealing performance directly affects the safety and efficiency of extraction operations. Currently, most thermal recovery wellhead equipment adopts a combination of metal seals and graphite seals.

[0003] Taking the metal seal on the upper part of the hanger as an example, during the operation of the thermal recovery wellhead device, the metal seal will be subjected to a high temperature and high pressure environment for a long time. Under the continuous action of high temperature and high pressure, the metal material will undergo plastic deformation, resulting in changes in its size and shape. When maintenance, replacement or repair of the thermal recovery wellhead device is required, the deformed metal seal will be tightly stuck in the upper flange body and difficult to remove.

[0004] Currently, there is a lack of professional and effective tools and methods for removing metal seals. Operators often have to resort to brute force using simple tools such as screwdrivers. However, this method of brute force has many drawbacks. Screwdrivers and similar tools are difficult to control precisely in terms of force and direction, easily causing scratches, bumps, and other damage to the surface of the metal seal. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention provides a tooling for disassembling a special metal seal for thermal recovery wellhead equipment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a tooling for disassembling a special metal seal for a thermal recovery wellhead device, comprising a flat plate, a four-way housing at the bottom end of the flat plate, the flat plate and the four-way housing being fixedly connected by a fixing nut, a connecting bolt being threaded onto the surface of the fixing nut, a metal sealing sleeve being provided inside the top end of the four-way housing, a rotating connecting rod located inside the metal sealing sleeve being threaded onto the inside of the flat plate, a handle being fixedly installed at the top end of the surface of the rotating connecting rod, and a rotating connecting block located inside the metal sealing sleeve being fitted onto the bottom end of the surface of the rotating connecting rod.

[0007] Preferably, the bottom end of the rotating connecting rod and the top end of the rotating connecting block are respectively provided with inclined surfaces, and the angles of the two inclined surfaces are the same.

[0008] Preferably, the flat plate has an internal thread, the rotating connecting rod has an external thread, and the surface of the rotating connecting rod is in contact with the inner wall of the flat plate.

[0009] Preferably, the number of fixing nuts and connecting bolts is four, and they are arranged in an array on the surface of the flat plate and the four-way housing.

[0010] Preferably, a plug located on the surface of the handle is inserted into the interior of the top end of the rotating connecting rod.

[0011] Preferably, the rotating connecting block is formed by multiple wire cutting operations.

[0012] Preferably, the surface of the metal sealing sleeve is provided with a sealing ring, and the surface of the sealing ring is in contact with the inner wall of the four-way housing.

[0013] Preferably, the interior of both the top and bottom ends of the metal sealing sleeve are chamfered.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention involves rotating the component handle, which drives the connected component rotating connecting rod to rotate. Because the component rotating connecting rod is threadedly connected to the component flat plate, it moves upward along the threaded trajectory when rotating, cooperating with the component rotating connecting block. Together, they move upward inside the component's metal sealing sleeve. During this process, the rotating connecting rod and the rotating connecting block apply a horizontal dispersive force to the component's metal sealing sleeve. Under the continuous drive of the component handle, the dispersive force is transformed into a pushing force that causes the component's metal sealing sleeve to be disassembled, causing the metal seal to move upward and be removed. The component rotating connecting block is initially gathered by the spring ring, and is stable during rotational expansion. After the metal seal is removed, it automatically resets under the elastic force of the spring ring, avoiding damage or scratches to the inner surface of the component's four-way housing when removing the component's metal sealing sleeve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the four-way housing of the present invention; Figure 3 This is a schematic diagram illustrating the rotating connecting block of the present invention; Figure 4 For the present invention Figure 3 Enlarged diagram of point A in the diagram; Figure 5 This is a schematic diagram showing the handle of the present invention.

[0016] In the diagram: 1. Flat plate; 2. Fixing nut; 3. Handle; 4. Rotating connecting rod; 5. Connecting bolt; 6. Metal sealing sleeve; 7. Rotating connecting block; 8. Four-way housing. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figures 1 to 5 As shown, the present invention provides a tooling for disassembling a special metal seal for a thermal wellhead device, including a flat plate 1, a four-way housing 8 at the bottom end of the flat plate 1, the flat plate 1 and the four-way housing 8 being fixedly connected by a fixing nut 2, a metal sealing sleeve 6 being provided inside the top end of the four-way housing 8, a rotating connecting rod 4 located inside the metal sealing sleeve 6 being threadedly connected inside the flat plate 1, a handle 3 being fixedly installed at the top end of the surface of the rotating connecting rod 4, and a rotating connecting block 7 located inside the metal sealing sleeve 6 being fitted onto the bottom end of the surface of the rotating connecting rod 4.

[0019] The operator manually rotates component handle 3. When handle 3 starts to rotate, it drives the connected component rotating connecting rod 4 to rotate as well. Since the component rotating connecting rod 4 is threadedly connected to the component flat plate 1, it moves upward along the threaded path as it rotates. At this time, the upward-moving component rotating connecting rod 4 cooperates with the component rotating connecting block 7, and the two move upward together inside the component metal sealing sleeve 6. During this movement, the combination of rotating connecting rod 4 and rotating connecting block 7 applies a force distributed towards the horizontal plane to the component metal sealing sleeve 6. Immediately afterwards, with the continuous rotation of component handle 3... Under the driving force, this dispersed force will be further transformed into a top force that disassembles the metal sealing sleeve 6 of the component to the outside. This top force can cause the metal seal to be stressed and move upward, and finally complete the removal of the metal seal smoothly. At the same time, the rotating connecting block 7 of the component is tightly gathered together by the spring ring in the initial state. When the rotating connecting block 7 is rotated and expanded, it can ensure that it plays a stable role in the removal process. After the metal seal is successfully removed, the rotating connecting block will return to the initial state by itself under the action of the spring ring. This design effectively avoids damage or scratches to the inner surface of the four-way housing 8 of the component when removing the metal sealing sleeve 6 of the component.

[0020] like Figure 4 and Figure 5 As shown, the bottom end of the rotating connecting rod 4 and the top end of the rotating connecting block 7 are respectively provided with inclined surfaces, and the angles of the two inclined surfaces are the same.

[0021] By rotating the connecting rod 4 and the connecting block 7, a 30-degree inclined plane is set at the bottom of the connecting rod 4 and the top of the connecting block 7 respectively. By operating the rotating handle 3, the connecting rod 4 is rotated and moved upward. The connecting rod 4 and the connecting block 7 move upward inside the metal sealing sleeve 6 by means of the inclined plane. During the movement, the connecting rod 4 and the connecting block 7 combine to apply a horizontal dispersed force to the metal sealing sleeve 6, which is then converted into a top force to move the metal seal upward and remove it.

[0022] like Figure 1 and Figure 2 As shown, the interior of the flat plate 1 is provided with internal threads, the surface of the rotating connecting rod 4 is provided with external threads, and the surface of the rotating connecting rod 4 is in contact with the inner wall of the flat plate 1. There are four connecting bolts 5, which are arranged in an array on the surface of the flat plate 1 and the four-way housing 8.

[0023] By designing the planar plate 1, which has internal threads and external threads on the surface of the rotating connecting rod 4, the rotating connecting rod 4 will rotate along the inner wall of the thread groove when it rotates, thus realizing the movement of the rotating connecting rod 4. By designing the connecting bolts 5, which have four bolts, the stability between the planar plate 1 and the four-way housing 8 can be increased, ensuring the reliable operation of the device.

[0024] like Figure 4 and Figure 5 As shown, the top of the rotating connecting rod 4 is inserted with a rod located on the surface of the handle 3, and the rotating connecting block 7 is made by multiple wire cuttings.

[0025] The above solution is adopted as follows: By designing the rotating connecting rod 4, the handle 3 is connected to the rotating connecting rod 4 through a plug, thus fixing the handle 3 to the top of the rotating connecting rod 4, which facilitates the rotation of the handle 3 and the rotating connecting rod 4. By designing the rotating connecting block 7, which is made by multiple wire cuttings and connected by spring rings, the flexibility and restoring force of the spring rings are utilized to provide reliable buffering and connection when the rotating connecting block 7 is subjected to forces of different directions and degrees, effectively enhancing the overall performance and stability of the rotating connecting block 7.

[0026] like Figure 4 As shown, the surface of the metal sealing sleeve 6 is provided with a sealing ring, and the surface of the sealing ring is in contact with the inner wall of the four-way housing 8. The inside of the top and bottom ends of the metal sealing sleeve 6 are both chamfered.

[0027] The above solution is adopted: Through the design of the metal sealing sleeve 6, since the surface of the metal sealing sleeve 6 is provided with a sealing ring, the sealing between the rotating connecting block 7 and the four-way housing 8 is ensured. Through the design of the metal sealing sleeve 6, since the inside of the top and bottom ends of the metal sealing sleeve 6 are chamfered, the friction between it and the rotating connecting block 7 can be reduced, making it easier for the rotating connecting block 7 to be inserted into the metal sealing sleeve 6. Furthermore, the chamfer inside the bottom end contacts the chamfer of the rotating connecting block 7, making it easier for the rotating connecting block 7 to be pushed out of the metal sealing sleeve 6.

[0028] Working principle and usage process of this invention: First, check all parts of the tooling to ensure that the flat plate 1 and the four-way housing 8 are securely connected by the fixing nut 2, the threaded connection of the connecting bolt 5 on the surface of the fixing nut 2 is normal, the top insert of the rotating connecting rod 4 is securely connected to the handle 3, and the rotating connecting block 7 is tightly gathered by the spring ring in the initial state. Next, the operator manually rotates the component handle 3, causing the connected component rotating connecting rod 4 to rotate. Because the rotating connecting rod 4 is threadedly connected to the flat plate 1, and the inner wall of the flat plate 1 and the surface of the rotating connecting rod 4 are threadedly fitted, the rotating connecting rod 4 will move upward along the threaded trajectory. The bottom end of the rotating connecting rod 4 cooperates with the 30-degree inclined surface at the top of the rotating connecting block 7. The two move upward together inside the metal sealing sleeve 6, so that the metal sealing sleeve 6 is subjected to a horizontally dispersed force. This force is converted into a top force, causing the metal sealing sleeve 6 to be moved upward under force. During this process, the rotating connecting block 7 is cut by multiple wires, and the spring ring provides cushioning and connection, enhancing its performance and stability, and preventing damage to the metal sealing sleeve 6 or scratches on the inner surface of the four-way housing 8 when it is removed. The sealing ring on the surface of the metal sealing sleeve 6 ensures the seal with the four-way housing 8. The chamfered design at its top and bottom reduces friction with the rotating connecting block 7, making it easy for the rotating connecting block 7 to insert and eject the metal sealing sleeve 6, thus completing the final operation process.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tooling for disassembling a special metal seal for a thermal recovery wellhead device, comprising a flat plate (1), characterized in that: The bottom end of the flat plate (1) is provided with a four-way housing (8). The flat plate (1) and the four-way housing (8) are fixedly connected by a fixing nut (2). The surface of the fixing nut (2) is threaded with a connecting bolt (5). The top end of the four-way housing (8) is provided with a metal sealing sleeve (6). The interior of the flat plate (1) is threaded with a rotating connecting rod (4) located inside the metal sealing sleeve (6). The top end of the surface of the rotating connecting rod (4) is fixedly installed with a handle (3). The bottom end of the surface of the rotating connecting rod (4) is fitted with a rotating connecting block (7) located inside the metal sealing sleeve (6).

2. The tooling for disassembling the special metal seal of a thermal recovery wellhead device according to claim 1, characterized in that: The bottom end of the rotating connecting rod (4) and the top end of the rotating connecting block (7) are respectively provided with inclined surfaces, and the angles of the two inclined surfaces are the same.

3. The tooling for disassembling the special metal seal of a thermal recovery wellhead device according to claim 1, characterized in that: The interior of the flat plate (1) is provided with internal threads, the surface of the rotating connecting rod (4) is provided with external threads, and the surface of the rotating connecting rod (4) is in contact with the inner wall of the flat plate (1).

4. The tooling for disassembling the special metal seal of a thermal recovery wellhead device according to claim 1, characterized in that: The number of the fixing nuts (2) and connecting bolts (5) is four, and they are arranged in an array on the surface of the flat plate (1) and the four-way housing (8).

5. The tooling for disassembling the special metal seal of a thermal recovery wellhead device according to claim 1, characterized in that: The top of the rotating connecting rod (4) is inserted with a plug located on the surface of the handle (3).

6. The tooling for disassembling the special metal seal of a thermal recovery wellhead device according to claim 1, characterized in that: The rotating connecting block (7) is made by multiple wire cuttings.

7. The tooling for disassembling the special metal seal of a thermal recovery wellhead device according to claim 1, characterized in that: The surface of the metal sealing sleeve (6) is provided with a sealing ring, and the surface of the sealing ring is in contact with the inner wall of the four-way housing (8).

8. The tooling for disassembling the special metal seal of a thermal recovery wellhead device according to claim 1, characterized in that: The metal sealing sleeve (6) has chamfered interiors at both the top and bottom.

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