Fracturing wellhead device not prone to inclination

Abstract

The invention discloses a fracturing wellhead device not prone to inclination. The fracturing wellhead device comprises a wellhead device body. The wellhead device body is composed of a Christmas tree, a flat valve, a tubing head and a casing head. The supporting assembly is used for preventing the wellhead device body from inclining; the supporting assembly comprises a plurality of vertical rods which are symmetrically and evenly distributed on the two sides of the well mouth device body. Due to the fact that the position of the well head device body is fixed, the well head device body cannot move in the horizontal direction and only possibly inclines, when the well head device body needs to incline, the first supporting plate and the second supporting plate are limited in the fixed double transverse plates, and therefore angle deviation of the first supporting plate and the second supporting plate can be limited; therefore, under the extreme pressure working condition, auxiliary fixing can be carried out on the connecting joints of the wellhead device body, the connecting strength of the connecting parts is improved, the wellhead device body is prevented from inclining after being used for a long time, and the purpose of avoiding potential safety hazards is achieved.

Description

Technical Field

[0001] This invention relates to the field of fracturing wellhead technology, and more specifically to a fracturing wellhead device that is not easily tilted. Background Technology

[0002] The fracturing wellhead assembly is a high-pressure control system specifically designed for hydraulic fracturing operations. It consists of high-strength flanges, valves (especially inverted main valves and wing valves), and a four-way valve with multiple high-pressure fluid inlets (side ports). Its core function is to withstand and control the enormous pressure generated during fracturing fluid injection, providing a safe and reliable passage for the manifold connecting to the fracturing pump truck, and possessing multiple critical safety barriers. It is a key wellhead device ensuring the safe and smooth operation of fracturing operations.

[0003] When using fracturing wellhead equipment, improper operation, disrepair over the years, or external factors may cause the high-pressure seal inside the tubing to fail, leading to unexpected flow or blowout. If the fracturing wellhead equipment tilts at this time, the high-pressure fluid will be ejected at high speed along the tilt direction instead of vertically upward, which may impact nearby workers and cause a safety accident.

[0004] After prolonged use, fracturing wellhead equipment often tilts due to factors such as foundation settlement or instability, structural deformation caused by ultra-high pressure operations, and massive lateral force impacts, leading to safety hazards. In particular, under extreme pressure conditions (especially approaching or exceeding the equipment's design limits), the wellhead equipment itself or certain critical connections may undergo permanent plastic deformation. This deformation is often asymmetrical, resulting in tilting and damage to the equipment, thus presenting certain limitations. Summary of the Invention

[0005] The purpose of this invention is to provide a fracturing wellhead device that is not prone to tilting, thereby solving the technical problem that in the prior art, fracturing wellhead devices are prone to tilting after long-term use due to factors such as foundation settlement or instability, structural deformation caused by ultra-high pressure operations, and huge lateral force impacts, which leads to safety hazards of the equipment.

[0006] The objective of this invention can be achieved through the following technical solutions: A non-tilting fracturing wellhead device includes a wellhead device body; the wellhead device body is composed of a Christmas tree, a flat plate valve, a tubing head, and a casing head; it also includes a support assembly to prevent the wellhead device body from tilting; the support assembly includes multiple uprights symmetrically and evenly distributed on both sides of the wellhead device body; it also includes double horizontal plates that are connected to the uprights using connectors; each of the double horizontal plates has a hole corresponding to the position of each upright; connecting assemblies are provided between the Christmas tree and the uppermost flat plate valve, between the lowermost flat plate valve and the tubing head, and between the tubing head and the casing head; the connecting assemblies include a double-threaded rod with an integrally formed limiting part in the lower middle part of the double-threaded rod; the connecting assemblies also include a first support plate located above the uppermost flat plate valve and below the lowermost flat plate valve, and a second support plate located below the tubing head; both the first and second support plates are connected to the wellhead device body by the double-threaded rod and a second nut.

[0007] Preferably, the outer surface of the upright has anti-slip texture; the connector includes a first connecting block and a second connecting block that can be interlocked; the first connecting block and the second connecting block have a vertical circular hole in the vertical direction; the first connecting block and the second connecting block have two horizontal square holes in the horizontal direction; the second connecting block has multiple anti-slip protrusions corresponding to the positions inside the vertical circular holes.

[0008] Preferably, the first connecting block has multiple insert rods fixedly connected to the side near the second connecting block. The outer end of each insert rod is detachably provided with a wing nut. The second connecting block has a corresponding through hole at the position of the insert rod. After the first connecting block and the second connecting block are fastened together, the insert rod is inserted into the through hole and the outer end is locked and fixed by the wing nut.

[0009] Preferably, after the first connecting block and the second connecting block are engaged, they are fitted onto the upright through the vertical round hole; after the first connecting block and the second connecting block are engaged, they are fitted onto the double horizontal plate through the horizontal square hole; after the first connecting block and the second connecting block are engaged with each other, the anti-slip protrusions and anti-slip textures engage to fix the double horizontal plate at the designated position on the upright.

[0010] Preferably, both the first support plate and the second support plate are provided with nail holes that correspond one-to-one with the flange holes; the first support plate and the second support plate are also provided with cuts, the inner side of which is respectively a semi-circular structure that fits the upper part of the uppermost flat valve, the lower part of the lowermost flat valve and the lower part of the oil pipe head.

[0011] Preferably, the connection between the wellhead and the uppermost flat valve, and between the lowermost flat valve and the tubing head, is completed by direct engagement of a double-threaded rod with the threaded hole of the flange provided thereon. The connection between the tubing head and the casing head is completed by engagement of a double-threaded rod with the first nut.

[0012] Preferably, the double horizontal plates are provided in three sets, and are respectively located at the same height as the two first support plates and the second support plate, and the two ends of the first support plate and the second support plate are respectively inserted into the middle of the corresponding double horizontal plates.

[0013] Preferably, each of the uprights is provided with a connecting plate above the connecting member, and the two ends of the connecting plate are fixedly connected to the sleeves, which are sleeved on the uprights to connect the uprights on both sides of the wellhead device body.

[0014] Preferably, the fracturing wellhead device includes the following setup steps: S1. Using the cone at the lower end of the upright, insert the uprights on both sides of the wellhead device body, with each upright located in the middle between adjacent wellhead device bodies. S2. Use connectors to fix the three double horizontal plates to the designated positions on the uprights, and use connecting plates to connect the uprights on both sides of the wellhead device body. S3. First, connect the casing head to the wellhead, then place the tubing head on the upper part of the casing head. After they are coaxial, use the double-ended threaded rod and the first nut to connect and fix them. Then, put the second support plate along the length of the double horizontal plate from the cut to the lower part of the tubing head. Then rotate the second support plate 90° so that both ends of the second support plate enter the middle of the double horizontal plate. Finally, use the double-ended threaded rod, the second nut and the nail hole to fix the second support plate. S4. Place the flat valve on the oil pipe head, and after it is coaxial, use the double-threaded rod and the flange thread hole to connect and fix the flat valve to the oil pipe head; then, in the same way as the second support plate, put one of the first support plates on the bottom of the flat valve, and use the double-threaded rod, the second nut and the nail hole to fix the first support plate. S5. Place the tree on the top plate valve, and after it is coaxial, use the same method as in step S4 to connect and fix the tree to the plate valve, as well as fix the other first support plate.

[0015] Preferably, in step S2, the first connecting block is inserted into the double horizontal plate from the inside, and the second connecting block is inserted into the double horizontal plate from the outside. The first connecting block and the second connecting block are engaged simultaneously, so that the anti-slip protrusions and anti-slip patterns are engaged. Finally, a wing nut is used to fix it.

[0016] The beneficial effects of this invention are: 1. This invention uses two first support plates and one second support plate to support the main connection nodes of the wellhead device body. Since the position of the wellhead device body is fixed and cannot move horizontally, it can only tilt. Therefore, when the wellhead device body is about to tilt, the first and second support plates are restricted from angular displacement because they are confined inside the fixed double horizontal plates. This allows for auxiliary fixation of the connection nodes of the wellhead device body under extreme pressure conditions, improving the connection strength of the connection parts and preventing the wellhead device body from tilting after long-term use, thus avoiding safety hazards.

[0017] 2. In this invention, after the entire support assembly, connecting assembly, and wellhead device body are erected, the uprights, double horizontal plates, and connecting plates together form a cage structure. This not only improves the connection stability of the double horizontal plates and effectively limits the first and second support plates, enhancing the anti-tilting capability of the wellhead device body, but also encloses the wellhead device body internally, preventing it from tilting due to huge lateral force impacts. In addition, because the uprights, double horizontal plates, and connecting plates form a cage structure, multiple connections are made between the uprights and the foundation, effectively resisting foundation settlement or instability factors. Then, the two ends of the first and second support plates are supported, indirectly supporting the wellhead device body and achieving the anti-tilting capability of the wellhead device body.

[0018] 3. Since the Christmas tree, flat valve, and tubing head in the wellhead device body are all supported and fixed by the first support plate or the second support plate, if any one of the Christmas tree, flat valve, tubing head, or casing head needs maintenance, it can be removed individually without removing other parts at the same time. This improves convenience for subsequent installation and disassembly. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the mating structure of the wellhead device body and the connecting components in this invention; Figure 3 This is a schematic diagram of the structure of the wellhead device body in this invention; Figure 4 This is a partial structural schematic diagram of the connecting component in this invention; Figure 5 This is another structural schematic diagram of the connecting component in this invention; Figure 6 This is a schematic diagram of the supporting component in this invention; Figure 7 yes Figure 6 A magnified view of a section at point A in the middle; Figure 8 This is a schematic diagram of the structure of the upright pole in this invention; Figure 9 This is a schematic diagram of the double horizontal plate structure in this invention; Figure 10 This is a schematic diagram of the connector structure in this invention; Figure 11 This is a schematic diagram of the structure of the first connecting block in this invention; Figure 12 This is a schematic diagram of the structure of the second connecting block in this invention; Figure 13 This is a schematic diagram of the connecting plate in this invention.

[0021] In the diagram: 1. Wellhead assembly body; 11. Christmas tree; 12. Flat plate valve; 13. Tubing head; 14. Casing head; 15. Connecting assembly; 151. Double-ended threaded rod; 152. First nut; 153. Second nut; 154. First support plate; 155. Second support plate; 156. Nail hole; 157. Cut; 2. Support assembly; 21. Vertical rod; 211. Anti-slip texture; 212. Conical head; 22. Double horizontal plate; 221. Insertion hole; 23. Connector; 231. First connecting block; 232. Second connecting block; 233. Vertical round hole; 234. Horizontal square hole; 24. Connecting plate; 241. Casing; 2311. Insertion rod; 2312. Wing nut; 2321. Through hole; 2322. Anti-slip protrusion. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-3 As shown, a fracturing wellhead device that is not prone to tilting includes a wellhead device body 1 and a support assembly 2 to prevent the wellhead device body 1 from tilting. The wellhead device body 1 consists of a Christmas tree 11, a flat valve 12, a tubing head 13, and a casing head 14 connected sequentially from top to bottom via flanges, wherein the casing head 14 is connected to the wellhead. Since the specific model, connection method, and connection structure of the wellhead device body 1 are existing technologies, they will not be described in detail in this embodiment.

[0024] Please refer to it again. Figures 2-5As shown, this embodiment differs from the prior art in that: connecting components 15 are provided between the tree 11 and the uppermost flat valve 12, between the lowermost flat valve 12 and the tubing head 13, and between the tubing head 13 and the casing head 14. The connecting components 15 are used to complete the assembly and connection of the tree 11, flat valve 12, tubing head 13 and casing head 14 in the wellhead device body 1. The connecting components 15 and the support components 2 work together to achieve anti-tilting support for the wellhead device body 1.

[0025] Please refer to it again. Figure 4 and Figure 5 As shown, the connecting assembly 15 includes a double-ended threaded rod 151 located between the Christmas tree 11 and the uppermost flat valve 12, between the lowermost flat valve 12 and the tubing head 13, and between the tubing head 13 and the casing head 14. The lower part of the double-ended threaded rod 151 is provided with an integrally formed limiting part, which is preferably but not limited to... Figure 4 The nut-shaped structure in the middle can be, for example, circular; the connection between the production tree 11 and the uppermost plate valve 12, and between the lowermost plate valve 12 and the tubing head 13, is completed by directly engaging the flange threaded hole provided on it with the double-ended threaded rod 151; the connection between the tubing head 13 and the casing head 14 is completed by engaging the first nut 152 with the double-ended threaded rod 151.

[0026] like Figures 2-3 As shown, the connecting assembly 15 also includes a first support plate 154 located above the uppermost plate valve 12 and below the lowermost plate valve 12, and a second support plate 155 located below the tubing head 13; the first support plate 154 and the second support plate 155 are both connected to the wellhead device body 1 by a double-threaded rod 151 and a second nut 153.

[0027] like Figure 5 As shown, the first support plate 154 and the second support plate 155 are each provided with nail holes 156 that correspond one-to-one with the flange holes. The nail holes 156 are used to fit the double-threaded rod 151 and the second nut 153. The first support plate 154 and the second support plate 155 are also provided with slits 157. The inner side of the slits 157 is respectively a semi-circular structure that fits the upper part of the uppermost flat valve 12, the lower part of the lowermost flat valve 12 and the lower part of the tubing head 13, so as to facilitate the operator to install the first support plate 154 and the second support plate 155 on the wellhead device body 1.

[0028] Please refer to it again. Figure 1 and Figures 6-9As shown, the support assembly 2 includes multiple uprights 21 symmetrically and evenly distributed on both sides of the wellhead device body 1; the outer surface of the uprights 21 is provided with anti-slip texture 211; the lower end of the uprights 21 is provided with a cone head 212; it also includes double horizontal plates 22 that are connected to the uprights 21 by connectors 23; each of the double horizontal plates 22 is provided with a hole 221 corresponding to the position of each upright 21, the diameter of the hole 221 being equal to the diameter of the upright 21; there are three sets of double horizontal plates 22, which are located at the same height as the two first support plates 154 and the second support plate 155, and the two ends of the first support plate 154 and the second support plate 155 are respectively inserted into the middle of the corresponding double horizontal plates 22.

[0029] Please refer to it again. Figure 6 and Figures 10-12 As shown, both the first support plate 154 and the second support plate 155 are fixed to a designated height position on the upright 21 by the connector 23. Specifically, the connector 23 includes a first connecting block 231 and a second connecting block 232 that interlock with each other; the first connecting block 231 and the second connecting block 232 have a vertical circular hole 233 in the vertical direction, the diameter of which is equal to the diameter of the upright 21, and the first connecting block 231 and the second connecting block 232 are fitted onto the upright 21 through the vertical circular hole 233 after being interlocked; the first connecting block 231 and the second connecting block 232 have two horizontal square holes 234 in the horizontal direction, the diameter of which is equal to the cross-sectional size of the double horizontal plate 22, and the first connecting block 231 and the second connecting block 232 are fitted onto the double horizontal plate 22 through the horizontal square holes 234 after being interlocked.

[0030] Multiple insert rods 2311 are fixedly connected to the side of the first connecting block 231 near the second connecting block 232. The outer end of the insert rod 2311 is detachably provided with a wing nut 2312. The second connecting block 232 has a corresponding through hole 2321 at the position of the insert rod 2311. After the first connecting block 231 and the second connecting block 232 are engaged, the insert rod 2311 is inserted into the through hole 2321, and the outer end is locked and fixed by the wing nut 2312. The second connecting block 232 has multiple anti-slip protrusions 2322 at the position of the vertical round hole 233. The anti-slip protrusions 2322 fit with the anti-slip texture 211. After the first connecting block 231 and the second connecting block 232 are engaged, the anti-slip protrusions 2322 and the anti-slip texture 211 are engaged, thereby fixing the double horizontal plate 22 to the designated position on the upright 21.

[0031] Please refer to it again. Figure 6 and Figure 13 As shown, further, each of the uprights 21 is provided with a connecting plate 24 above the connector 23. The two ends of the connecting plate 24 are fixed with sleeves 241, and the diameter of the hole on the sleeve 241 is equal to the diameter of the upright 21. The sleeves are fitted onto the uprights 21 and are used to connect the uprights 21 on both sides of the wellhead device body 1.

[0032] To facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process will be described in detail below: First, set up support component 2. The specific steps are as follows: A1. Using the cone 212 at the lower end of the upright 21, the upright 21 is inserted on both sides of the wellhead device body 1, and each upright 21 is located in the middle position between adjacent wellhead device bodies 1.

[0033] A2. Use connector 23 to fix the three double horizontal plates 22 to the designated positions on the uprights 21, and use connecting plate 24 to connect the uprights 21 on both sides of the wellhead device body 1.

[0034] In step A2, when fixing the double horizontal plate 22 to the upright 21 using connector 23, the first connecting block 231 is inserted into the double horizontal plate 22 from the inside (i.e., the side closest to the wellhead device body 1), and the second connecting block 232 is inserted into the double horizontal plate 22 from the outside. The first connecting block 231 and the second connecting block 232 are engaged simultaneously, so that the anti-slip protrusion 2322 engages with the anti-slip texture 211. Finally, the wing nut 2312 is used to fix it. Disassembly can be done by reversing the operation. The fixing method is simple, requires no tools, and is convenient to use.

[0035] Then, the main body of the wellhead device 1 is erected, and the specific steps are as follows: B1. First, connect the casing head 14 to the wellhead. Then, place the tubing head 13 on top of the casing head 14. After they are coaxial, use the double-threaded rod 151 and the first nut 152 to connect and fix them. Then, slide the second support plate 155 along the length of the double horizontal plate 22 from the cut 157 onto the lower part of the tubing head 13, and then... Figure 1 The arrow shown rotates the second support plate 155 by 90° so that both ends of the second support plate 155 enter the middle of the double horizontal plate 22. Finally, the second support plate 155 is fixed by the cooperation of the double-headed threaded rod 151, the second nut 153 and the nail hole 156.

[0036] B2. Next, place the flat valve 12 onto the oil pipe head 13. After they are coaxial, use the engagement of the double-threaded rod 151 and the flange threaded hole to connect and fix the flat valve 12 and the oil pipe head 13. Then, in the same way as the second support plate 155, put one of the first support plates 154 on the lower part of the bottom flat valve 12, and use the engagement of the double-threaded rod 151, the second nut 153 and the nail hole 156 to fix the first support plate 154.

[0037] B3. Finally, place the tree 11 on the top plate valve 12, and after they are coaxial, use the same method as in step S4 to connect and fix the tree 11 and the plate valve 12, as well as fix the other first support plate 154.

[0038] In the above steps, the fracturing wellhead device provided by the present invention supports each of the main connection nodes of the wellhead device body 1 through two first support plates 154 and one second support plate 155 respectively. Since the position of the wellhead device body 1 is fixed and cannot move in the horizontal direction, it can only tilt. Therefore, when the wellhead device body 1 is about to tilt, the first support plates 154 and the second support plates 155 are restricted to angular displacement because they are confined inside the fixed double horizontal plates 22. This allows for auxiliary fixation of the connection nodes of the wellhead device body 1 under extreme pressure conditions, improving the connection strength of the connection parts and preventing the wellhead device body 1 from tilting after long-term use, thus achieving the purpose of avoiding safety hazards.

[0039] In this structure, after the entire support assembly 2, connecting assembly 15, and wellhead device body 1 are erected, the upright 21, double horizontal plates 22, and connecting plate 24 together form a cage structure. This not only improves the connection stability of the double horizontal plates 22 and effectively limits the first support plate 154 and the second support plate 155, enhancing the anti-tilting capability of the wellhead device body 1, but also encloses the wellhead device body 1 internally, preventing it from tilting due to huge lateral force impact. In addition, the cage structure formed by the upright 21, double horizontal plates 22, and connecting plate 24 connects the upright 21 to the foundation at multiple points, effectively resisting foundation settlement or instability factors. Then, it supports the two ends of the first support plate 154 and the second support plate 155, indirectly supporting the wellhead device body 1 and achieving the anti-tilting capability of the wellhead device body 1.

[0040] In addition, since the wellhead equipment body 1 has a tree 11, a flat valve 12 and a tubing head 13, all of which are supported and fixed by the first support plate 154 or the second support plate 155, if any of the tree 11, the flat valve 12, the tubing head 13 and the casing head 14 need to be repaired, they can be removed individually without removing the other parts at the same time. This improves the convenience of subsequent installation and disassembly.

[0041] It should be noted that, in this document, terms such as “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.

[0042] 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.

Claims

1. A non-tilting fracturing wellhead device, comprising a wellhead device body (1); the wellhead device body (1) is composed of a Christmas tree (11), a flat valve (12), a tubing head (13), and a casing head (14); characterized in that: It also includes a support assembly (2) to prevent the wellhead device body (1) from tilting; the support assembly (2) includes multiple uprights (21) symmetrically and evenly distributed on both sides of the wellhead device body (1); it also includes a double horizontal plate (22) that is connected to the uprights (21) by a connector (23); the double horizontal plate (22) is provided with a hole (221) corresponding to the position of each upright (21). A connecting assembly (15) is provided between the tree (11) and the uppermost flat valve (12), between the lowermost flat valve (12) and the tubing head (13), and between the tubing head (13) and the casing head (14). The connecting assembly (15) includes a double-threaded rod (151), the lower part of which is provided with an integrally formed limiting part. The connecting assembly (15) also includes a first support plate (154) located above the uppermost flat valve (12) and below the lowermost flat valve (12), and a second support plate (155) located below the tubing head (13). The first support plate (154) and the second support plate (155) are connected to the wellhead device body (1) by the double-threaded rod (151) and the second nut (153).

2. The fracturing wellhead device that is not easily tilted according to claim 1, characterized in that: The outer side of the upright (21) is provided with anti-slip texture (211); the connector (23) includes a first connecting block (231) and a second connecting block (232) that can be interlocked with each other; the first connecting block (231) and the second connecting block (232) are provided with a vertical round hole (233) in the vertical direction; the first connecting block (231) and the second connecting block (232) are provided with two horizontal square holes (234) in the horizontal direction; the second connecting block (232) is provided with a plurality of anti-slip protrusions (2322) corresponding to the position inside the vertical round hole (233).

3. The fracturing wellhead device that is not easily tilted according to claim 2, characterized in that: The first connecting block (231) has multiple insert rods (2311) fixedly connected to the side of the first connecting block (232) near the second connecting block (232). The outer end of the insert rod (2311) is detachably provided with a wing nut (2312). The second connecting block (232) has a corresponding through hole (2321) at the position of the insert rod (2311). After the first connecting block (231) and the second connecting block (232) are fastened together, the insert rod (2311) is inserted into the through hole (2321), and the outer end is locked and fixed by the wing nut (2312).

4. The fracturing wellhead device that is not easily tilted according to claim 2, characterized in that: After the first connecting block (231) and the second connecting block (232) are fastened together, they are fitted onto the upright (21) through the vertical round hole (233); after the first connecting block (231) and the second connecting block (232) are fastened together, they are fitted onto the double horizontal plate (22) through the horizontal square hole (234); after the first connecting block (231) and the second connecting block (232) are fastened together, the anti-slip protrusion (2322) and the anti-slip texture (211) engage to fix the double horizontal plate (22) at the designated position on the upright (21).

5. A fracturing wellhead device that is not easily tilted according to claim 1, characterized in that: The first support plate (154) and the second support plate (155) are provided with nail holes (156) that correspond one-to-one with the flange holes; the first support plate (154) and the second support plate (155) are also provided with cuts (157), the inner side of which is respectively a semi-circular structure that fits the upper part of the uppermost flat valve (12), the lower part of the lowermost flat valve (12) and the lower part of the oil pipe head (13).

6. The fracturing wellhead device that is not easily tilted according to claim 1, characterized in that: The oil well (11) is connected to the uppermost flat valve (12), and the lowermost flat valve (12) is connected to the tubing head (13) by a double-ended threaded rod (151) directly engaging with the flange threaded hole on it. The tubing head (13) is connected to the casing head (14) by a double-ended threaded rod (151) engaging with the first nut (152).

7. The fracturing wellhead device that is not easily tilted according to claim 1, characterized in that: The double horizontal plates (22) are provided in three sets, and are respectively located at the same height as the two first support plates (154) and the second support plate (155), and the two ends of the first support plate (154) and the second support plate (155) are respectively inserted in the middle of the corresponding double horizontal plates (22).

8. A fracturing wellhead device that is not easily tilted according to claim 1, characterized in that: Each of the uprights (21) is provided with a connecting plate (24) above the connector (23). The two ends of the connecting plate (24) are fixed with a sleeve (241), and the sleeve (241) is sleeved on the upright (21) to connect the uprights (21) on both sides of the wellhead device body (1).

9. A non-tilting fracturing wellhead device according to any one of claims 1-8, characterized in that: The fracturing wellhead device includes the following setup steps: S1. Using the cone (212) at the lower end of the upright (21), the upright (21) is inserted on both sides of the wellhead device body (1), and each upright (21) is located in the middle between adjacent wellhead device bodies (1). S2. Use connectors (23) to fix three double horizontal plates (22) to the designated positions on the uprights (21), and use connecting plates (24) to connect the uprights (21) on both sides of the wellhead device body (1). S3. First, connect the casing head (14) to the wellhead, then place the tubing head (13) on the upper part of the casing head (14). After they are coaxial, use the double-ended threaded rod (151) and the first nut (152) to achieve connection and fixation. Then, put the second support plate (155) along the length of the double horizontal plate (22) from the cut (157) on the lower part of the tubing head (13), then rotate the second support plate (155) 90° so that the two ends of the second support plate (155) enter the middle of the double horizontal plate (22). Finally, use the double-ended threaded rod (151), the second nut (153) and the nail hole (156) to fix the second support plate (155). S4. Place the flat plate valve (12) on the oil pipe head (13), and after they are coaxial, use the double-ended threaded rod (151) and the flange threaded hole to connect and fix the flat plate valve (12) and the oil pipe head (13); then, in the same way as the second support plate (155), put one of the first support plates (154) on the lower part of the flat plate valve (12), and use the double-ended threaded rod (151), the second nut (153) and the nail hole (156) to fix the first support plate (154); S5. Place the tree (11) on the top plate valve (12), and after it is coaxial, use the same method as in step S4 to connect and fix the tree (11) and the plate valve (12), and fix the other first support plate (154).

10. A fracturing wellhead device that is not prone to tilting according to claim 9, characterized in that: In S2, the first connecting block (231) is inserted into the double horizontal plate (22) from the inside, and the second connecting block (232) is inserted into the double horizontal plate (22) from the outside. The first connecting block (231) and the second connecting block (232) are engaged simultaneously, so that the anti-slip protrusion (2322) engages with the anti-slip texture (211). Finally, the butterfly nut (2312) is used for fixing.

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