Casing head device for oil extraction well mouths with various calibers

Abstract

The invention discloses an oil extraction wellhead casing head device for various calibers. The oil extraction wellhead casing head device comprises a pipeline body, a connecting disc, a plurality of clamping mechanisms and a supporting mechanism. According to the oil extraction wellhead casing head device for the multiple calibers, the multiple fixing grooves with the different inner diameters are formed in the connecting disc, and the multiple clamping mechanisms are matched, so that the oil extraction wellhead casing head device can be flexibly matched in the wellheads with the different calibers, parts do not need to be replaced, and rapid adjustment and installation are facilitated. By means of the design, the universality and adaptability of the device are greatly improved, and the limitation that in the prior art, parts need to be replaced due to the well mouth size difference is overcome. And through the arrangement of the supporting mechanism, a more stable supporting function can be provided for the oil extraction wellhead casing head device, so that the oil extraction wellhead casing head device keeps high stability in a dynamic working state.

Description

Technical Field

[0001] The present invention relates to the technical field of oil production wellhead casing, and particularly to an oil production wellhead casing head device for multiple calibers. Background Art

[0002] The basic structure of an oil production wellhead casing head device suitable for multiple calibers generally includes the following main parts: Casing head body: The casing head body is made of high-pressure and high-temperature resistant steel or alloy materials, and its shape is usually cylindrical. It is internally provided with multiple adapter joints and a sealing system for connecting with wellhead pipelines or other equipment. This structural design mainly ensures the sealing performance and strength of the wellhead, preventing oil and gas leakage in the well. Adapter joint: The adapter joint adopts an adjustable design and can flexibly adapt to casings of different calibers. By adjusting the sealing ring and thread of the joint, the casing head can effectively connect with casings of different outer diameters, ensuring reliable sealing at the connection. Sealing system: The casing head is designed with multiple sealing rings to cope with pressure changes at different wellheads. These sealing rings are generally made of high-temperature and corrosion-resistant materials (such as PTFE or rubber), which can effectively prevent oil and gas leakage and ensure the safety of operations. External protection device: A protective cover or coating is provided on the outside of the casing head to resist corrosion and physical impact from the external environment and extend the service life of the equipment. This design principle ensures that it can flexibly meet the requirements of different calibers and environmental conditions through the adjustment of the sealing system and adapter joints, and thus is widely applicable to various oil production wellheads.

[0003] Although the existing oil production wellhead casing head devices can adapt to casings of different calibers, there are still several technical defects, which are mainly reflected in the following aspects: Most of the current casing head devices adopt a single sealing ring design, and may not be able to provide long-term sealing effects when facing different pressure, temperature conditions or oil and gas compositions. Especially in harsh environments, leakage is likely to occur. The existing adapter joints often have the defect of limited adjustment range and cannot quickly and effectively respond to changes in different wellhead calibers. Especially when the wellhead caliber changes greatly, the existing technology cannot ensure the stability and safety of the connection. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an oil production wellhead casing head device for multiple calibers.

[0005] The technical solution adopted by the present invention to solve its technical problems is to construct an oil production wellhead casing head device for multiple calibers, which includes a pipeline main body, a connection disk, a plurality of clamping mechanisms and a support mechanism;

[0006] A central flow pipe is arranged in the inner cavity of the pipeline main body, the connection disk is fixedly connected with the pipeline main body, a plurality of fixing grooves with inconsistent inner diameters are arranged in the inner cavity of the connection disk, the fixing grooves are used for connecting with the casing, and the casing is communicated with the central flow pipe;

[0007] The clamping mechanism is connected to the connecting disc, and a plurality of the clamping mechanisms are used to clamp the casing.

[0008] The supporting mechanism is connected to the connecting disc, and the supporting mechanism is used for positioning and connecting to the casing.

[0009] In some embodiments, a flange is connected to the top end of the pipeline body, end covers and control valves are respectively connected to both sides of the circumferential end of the pipeline body, and a turntable is connected to the control valve.

[0010] In some embodiments, three fixing grooves are provided in the inner cavity of the connecting disc, namely a first fixing groove, a second fixing groove and a third fixing groove, and the inner diameters of the first fixing groove, the second fixing groove and the third fixing groove decrease in sequence.

[0011] In some embodiments, the clamping mechanism includes a fixed block, a limiting sleeve, an acting member and a limiting clamping piece;

[0012] The fixed block is fixedly connected to the connecting disc, the limiting sleeve is fixedly connected to the fixed block, the acting member is movably connected to the limiting sleeve, the acting member passes through the fixed block, and one end of the acting member is connected to the limiting clamping piece.

[0013] In some embodiments, an operation groove is provided on the acting member, and a clamping groove and a groove corresponding to the outer wall of the casing are provided on one side of the limiting clamping piece facing away from the fixed block;

[0014] The oil production well casing head device further includes a sealing member installed on the groove.

[0015] In some embodiments, the number of the clamping mechanisms is five, and the five clamping mechanisms are uniformly arranged along the circumferential direction of the connecting disc.

[0016] In some embodiments, the supporting mechanism includes a plurality of support rods, a support disc, a plurality of support feet and a plurality of limiting blocks;

[0017] Two ends of the support rod are respectively connected to the connecting disc and the support disc, and the support foot is connected to the bottom end of the support disc;

[0018] A through hole and a plurality of connection holes are provided on the support disc, the limiting blocks are installed on the connection holes, and the through hole is used for the casing to pass through.

[0019] In some embodiments, an elastic member is connected to the side wall of the limiting block.

[0020] In some embodiments, a docking groove for docking with the connection disk is provided on the support rod, and a pressure sensor is provided on the docking groove.

[0021] In some embodiments, a flow tube sleeve is provided inside the central flow tube.

[0022] Implementing the present invention has the following beneficial effects: The oil production wellhead casing head device for multiple calibers can be flexibly adapted to different-caliber wellheads by setting multiple fixing grooves with inconsistent inner diameters in the connection disk and through the cooperation of multiple clamping mechanisms, without the need to replace components, facilitating quick adjustment and installation. This design greatly improves the versatility and adaptability of the device, and solves the limitation in the prior art that components need to be replaced due to differences in wellhead sizes. Moreover, through the setting of the support mechanism, a more stable support function can be provided for the oil production wellhead casing head device, enabling the oil production wellhead casing head device to maintain a high degree of stability in the dynamic working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the present invention, the present invention will be further described below in conjunction with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts. In the drawings:

[0024] Figure 1 is the overall structural schematic diagram of the oil production wellhead casing head device for multiple calibers in some embodiments of the present invention;

[0025] Figure 2 is the overall structural schematic diagram of the oil production wellhead casing head device for multiple calibers in another direction in some embodiments of the present invention;

[0026] Figure 3 is the upper structural schematic diagram of the oil production wellhead casing head device for multiple calibers in some embodiments of the present invention;

[0027] Figure 4 is the structural schematic diagram of the clamping mechanism in some embodiments of the present invention;

[0028] Figure 5 is the upper structural schematic diagram of the oil production wellhead casing head device in another direction in some embodiments of the present invention;

[0029] Figure 6 is the structural schematic diagram of the support mechanism in some embodiments of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the accompanying drawings and are constructed and operated in a specific orientation, and are only for the convenience of describing the present technical solution, rather than indicating that the indicated devices or elements must have a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0031] It should also be noted that, unless otherwise clearly defined and limited, terms such as "installation", "connection", "attachment", "fixation", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. When an element is referred to as being "above" or "below" another element, the element can be "directly" or "indirectly" located above the other element, or there may also be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Please refer to Figures 1 to 5 , the present invention discloses an oil production wellhead casing head device for multiple calibers, which includes a pipeline main body 1, a connection disk 2, a plurality of clamping mechanisms 3, and a support mechanism 4. A central flow pipe 11 is provided in the inner cavity of the pipeline main body 1. The connection disk 2 is fixedly connected to the pipeline main body 1. A plurality of fixing grooves 21 with inconsistent inner diameters are provided in the inner cavity of the connection disk 2. The fixing grooves 21 are used for connecting with the casing, and the casing is communicated with the central flow pipe 11; the clamping mechanisms 3 are connected to the connection disk 2, and the plurality of clamping mechanisms 3 are used for clamping the casing; the support mechanism 4 is connected to the connection disk 2, and the support mechanism 4 is used for positioning and connecting to the casing.

[0033] Understandably, the oil production wellhead casing head device for multiple calibers can be flexibly adapted to wellheads of different calibers through the arrangement of multiple fixing grooves 21 with inconsistent inner diameters in the connection disk 2 and the cooperation of multiple clamping mechanisms 3, without the need to replace components, facilitating quick adjustment and installation. This design greatly improves the versatility and adaptability of the device, solving the limitation in the prior art that components need to be replaced due to differences in wellhead sizes. Moreover, through the arrangement of the support mechanism 4, a more stable support function can be provided for the oil production wellhead casing head device, enabling the oil production wellhead casing head device to maintain a high degree of stability in the dynamic working state.

[0034] As Figure 3 shown, a flange 12 is connected to the top end of the pipeline main body 1, and end caps 13 and control valves 14 are respectively connected to both sides of the peripheral end of the pipeline main body 1. A turntable 15 is connected to the control valve 14. Specifically, the flange 12 is used to connect external pipelines or wellhead equipment and can flexibly match multiple standards, ensuring stable connection of wellheads with different calibers, avoiding the trouble of replacing components in traditional devices, and ensuring a tight connection between the oil production wellhead casing head device and the external system. The end cap 13 can enclose a part of the pipeline main body 1 and provide a sealing function to prevent oil and gas leakage, enhancing the safety of the pipeline main body 1. The control valve 14 is used to adjust the flow rate or the direction of the fluid inside the pipeline main body 1, and the turntable 15 is designed for easy operation to quickly adjust the flow rate.

[0035] In addition, a flow tube sleeve 16 is provided inside the central flow tube 11. The central flow tube 11 is used for the normal transmission of fluid, and the flow tube sleeve 16 further optimizes the guidance and flow of the fluid, reducing frictional losses and improving the fluid transmission efficiency.

[0036] As Figure 5 shown, three fixing grooves 21 are provided in the inner cavity of the connection disk 2. The three fixing grooves 21 are respectively a first fixing groove 211, a second fixing groove 212, and a third fixing groove 213, and the inner diameters of the first fixing groove 211, the second fixing groove 212, and the third fixing groove 213 decrease in sequence. In this embodiment, the lower part of the connection disk 2 is provided with a first fixing groove 211, a second fixing groove 212, and a third fixing groove 213 from outside to inside in sequence. The widths of the first fixing groove 211 and the second fixing groove 212 are the same and are twice that of the third fixing groove 213, and the interval widths between the first fixing groove 211, the second fixing groove 212, and the third fixing groove 213 are the same. This design can ensure excellent compatibility when connecting with casing joints of different specifications, solving the limitation of traditional devices that can only be adapted to a fixed caliber, and enabling the device to quickly adapt to wellheads of different calibers.

[0037] As Figure 4 and Figure 5As shown, the clamping mechanism 3 includes a fixed block 31, a limiting sleeve 32, an action member 33 and a limiting clamping piece 34. The fixed block 31 is fixedly connected to the connecting disk 2, the limiting sleeve 32 is fixedly connected to the fixed block 31, the action member 33 is movably connected to the limiting sleeve 32, the action member 33 is inserted through the fixed block 31, and one end of the action member 33 is connected to the limiting clamping piece 34. Specifically, the action member 33 is a connecting bolt. The upper side of the fixed block 31 is fixedly connected to the lower side of the connecting disk 2, the side wall of the fixed block 31 is fixedly connected to the limiting sleeve 32, the connecting bolt is threadedly connected to the limiting sleeve 32 and inserted through the fixed block 31, the connecting bolt is rotatably connected to the limiting clamping piece 34, and the connecting bolt can drive the limiting clamping piece 34 to move. The connection between the fixing block 31 and the connecting plate 2 ensures the stability of the entire device and enhances the sealing effect. In addition, the arrangement of the acting member 33 and the limiting clamping piece 34 makes the force of the clamping mechanism 3 more uniform and the sealing performance is significantly improved.

[0038] like Figure 4 As shown, the action member 33 is provided with an operation groove 331, which is specifically a hexagonal groove, which is convenient for adjustment and tightening by tools, so as to better control the clamping force and ensure that the oil wellhead casing head device can maintain long-term sealing and stability in various complex environments. The limiting clamping piece 34 is provided with a clamping groove 341 and a groove 342 corresponding to the outer wall of the casing on the side away from the fixed block 31. The clamping groove 341 is an arc groove, which matches the shape of the outer wall of the casing, and the oil wellhead casing head device also includes a seal installed on the groove 342, which can be a sealing ring. The groove 342 is divided into two, and the two grooves 342 are arranged up and down. The seal is installed on the groove 342 to ensure the sealing and clamping stability of the clamping mechanism 3 for the casing. The multi-layer sealing system effectively enhances the sealing performance through the cooperation of the arc groove and multiple seals, especially in the environment of high pressure, high temperature and complex oil and gas components, it can continuously maintain a stable sealing effect, avoiding the problem of sealing failure of the traditional single sealing ring under different working conditions. Furthermore, the provision of the clamping groove 341 and the groove 342 makes the installation of the fixed block 31 and the limiting clamping plate 34 easier and more stable. In actual use, the operator only needs to adjust the action member 33 to quickly replace and adjust the clamping mechanism 3, and no additional adaptation processing is required for each caliber. This not only improves the installation efficiency, but also greatly reduces the complexity of the operation and human errors.

[0039] In this embodiment, the number of the clamping mechanisms 3 is five, and the five clamping mechanisms 3 are evenly arranged along the circumferential direction of the connecting disk 2, that is, the five clamping mechanisms 3 are distributed in a ring array. In some other embodiments, the number and arrangement of the clamping mechanisms 3 can be set according to actual conditions, and no specific setting is made here.

[0040] likeFigure 6 As shown in the figure, the support mechanism 4 includes a plurality of support rods 41, a support disk 42, a plurality of support feet 43 and a plurality of limit blocks 44. The two ends of the support rod 41 are respectively connected to the connection disk 2 and the support disk 42. The support feet 43 are connected to the bottom end of the support disk 42. The support disk 42 is provided with a through hole 421 and a plurality of connection holes 422. The limit blocks 44 are installed in the connection holes 422, and the through hole 421 is used for the sleeve to pass through. In this embodiment, the number of the support rods 41 and the support feet 43 is five each. The five support rods 41 and the support feet 43 are evenly arranged along the circumferential direction of the support disk 42 and are distributed in an annular array. The support feet 43 can support on the connection structure of the sleeve. The through hole 421 is oval, the connection holes 422 are threaded holes, and the plurality of connection holes 422 are equidistantly distributed along the edge of the through hole 421. The limit blocks 44 can be installed in the connection holes 422 by bolts. The number of the limit blocks 44 is two, and the side walls of the limit blocks 44 can abut against the side wall of the sleeve to fix the relative position between the support mechanism 4 and the sleeve. Through the limit blocks 44 and the oval through hole 421, the support mechanism 4 can support sleeves with different diameters and ensure the stability of the device in complex environments such as high pressure and high temperature at the wellhead. At the same time, the limit blocks 44 can prevent the device from displacing due to pressure fluctuations during operation.

[0041] Furthermore, an elastic member 45 is connected to the side wall of the limit block 44. The elastic member 45 is an elastic sheet. The elastic sheet forms an effective seal by closely fitting the side wall of the sleeve to prevent leakage. This sealing effect can remain stable under various temperature and pressure conditions, ensuring the safe operation of the pipeline system. And the elastic sheet can absorb vibrations caused by temperature changes, pressure fluctuations or other external factors, thereby protecting the entire pipeline system from damage. This helps to reduce the impact of equipment vibrations on the sleeve and extend the service life of the sleeve.

[0042] The support rod 41 is provided with a docking groove 411 for docking with the connection disk 2, and a pressure sensor 5 is arranged on the docking groove 411. The pressure sensor 5 can be electrically connected to an external power supply and is used to detect the working state and pressure changes of the system in real time, ensuring that the device always operates under safe working conditions. This detection function, through cooperation with the support mechanism 4, provides timely data feedback to the operator and enables rapid response measures to be taken in case of abnormalities, thus effectively improving the safety and reliability of the system.

[0043] Understandably, the above embodiments only represent the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several modifications and improvements can also be made, which all fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. An oil production wellhead casing head device for multiple calibers, characterized in that, It comprises a pipeline body (1), a connecting plate (2), a plurality of clamping mechanisms (3) and a supporting mechanism (4); The inner cavity of the pipeline body (1) is provided with a central flow tube (11), the connecting plate (2) is fixedly connected to the pipeline body (1), the inner cavity of the connecting plate (2) is provided with a plurality of fixing grooves (21) with different inner diameters, the fixing grooves (21) are used to be connected to a sleeve, and the sleeve is in communication with the central flow tube (11); The clamping mechanism (3) is connected to the connecting plate (2), and a plurality of the clamping mechanisms (3) are used to clamp the sleeve; The supporting mechanism (4) is connected to the connecting plate (2), and the supporting mechanism (4) is used for positioning and connecting to the sleeve.

2. The casing head device for oil production wellheads with multiple diameters according to claim 1, characterized in that, The top end of the pipeline body (1) is connected to a flange (12), and both sides of the peripheral end of the pipeline body (1) are respectively connected to an end cover (13) and a control valve (14), and the control valve (14) is connected to a rotating disk (15).

3. The casing head device for oil production wellheads with multiple diameters according to claim 1, characterized in that, The inner cavity of the connection plate (2) is provided with three fixing grooves (21), the three fixing grooves (21) are respectively a first fixing groove (211), a second fixing groove (212) and a third fixing groove (213), and the inner diameters of the first fixing groove (211), the second fixing groove (212) and the third fixing groove (213) decrease in sequence.

4. The oil production wellhead casing head device for multiple calibers according to claim 1, characterized in that, The clamping mechanism (3) comprises a fixing block (31), a limiting sleeve (32), an action member (33) and a limiting clamping sheet (34); The fixing block (31) is fixedly connected to the connecting plate (2), the limiting sleeve (32) is fixedly connected to the fixing block (31), the action member (33) is movably connected to the limiting sleeve (32), the action member (33) is inserted into the fixing block (31), and one end of the action member (33) is connected to the limiting clamping piece (34).

5. The oil production wellhead casing head device for multiple calibers according to claim 4, characterized in that, The action member (33) is provided with an operating groove (331), and the side of the position-limiting clamping piece (34) facing away from the fixing block (31) is provided with a clamping groove (341) and a groove (342) corresponding to the outer wall of the sleeve; The oil production wellhead casing head device also includes a sealing member installed on the groove (342).

6. The casing head device for oil production wellheads with multiple diameters according to claim 1, characterized in that, The number of the clamping mechanisms (3) is five, and the five clamping mechanisms (3) are evenly arranged along the circumferential direction of the connecting disk (2).

7. The casing head device for oil production wellheads with multiple diameters according to claim 1, characterized in that, The support mechanism (4) comprises a plurality of support rods (41), a support plate (42), a plurality of support legs (43) and a plurality of limit blocks (44); The two ends of the support rod (41) are respectively connected to the connection plate (2) and the support plate (42), and the support foot (43) is connected to the bottom end of the support plate (42); The support plate (42) is provided with a through hole (421) and a plurality of connection holes (422); the limit block (44) is mounted on the connection hole (422); and the through hole (421) is used for the sleeve to pass through.

8. The oil production wellhead casing head device for multiple calibers according to claim 7, characterized in that, An elastic member (45) is connected to the side wall of the limiting block (44).

9. The oil production wellhead casing head device for multiple calibers according to claim 7, characterized in that, The support rod (41) is provided with a docking groove (411) for docking with the connection disk (2), and a pressure sensor (5) is arranged on the docking groove (411).

10. The oil production wellhead casing head device for multiple diameters according to claim 1, characterized in that, A flow tube sleeve (16) is arranged inside the central flow tube (11).

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