Bistable folding wellhead protection device

Abstract

The bistable folding type wellhead protection device comprises a base, a protection assembly and a driving assembly, the base is arranged at a wellhead, and two sets of opposite sides are formed on the base; the protection assembly comprises two first protection bodies, a second protection body and a third protection body, and the two first protection bodies are arranged on one set of opposite sides of the base in a turnover mode; the number of the second protection bodies is two, and the second protection bodies are arranged on the other set of opposite sides of the base. The third protection body is connected with the first protection body and the second protection body; the driving assembly is arranged on the base and connected with the first protection body, and the driving assembly is suitable for driving the first protection body to turn over relative to the base and driving the second protection body to rotate relative to the base through the third protection body so that the folding type wellhead protection device can be switched between the unfolded state and the folded state. The device can form circumferential comprehensive protection on a well mouth in an unfolded state and shield and seal the well mouth in a folded state, and can meet the high-frequency opening and closing requirements of the well mouth.

Description

Technical Field

[0001] The present invention relates to the technical field of wellhead protection, and particularly to a bistable folding wellhead protection device. Background Art

[0002] In heavy industrial facilities in fields such as metallurgy, chemical industry, and energy, industrial deep wells are widely used as special operation channels, carrying out high-risk industrial activities such as material transportation and equipment maintenance. The structural characteristics of such deep wells are: the cross-section of the wellhead is in a regular geometric shape, typically rectangular or square, and the depth usually exceeds 5 meters. Based on the process requirements, the wellhead opening and closing system needs to meet the requirement of high-frequency operation (the number of daily opening and closings ≥ 20 times). In the open condition, a free-edge interface with a vertical height difference of 1.2 - 2.5 meters is formed at the four perimeters of the wellhead, presenting a significant risk of falling. In related technologies, wellhead protection mainly relies on the vertical baffle structure formed by the flipping of the manhole cover body, which can only cover the protection in the direction of two opposite sides of the wellhead, forming a continuous safety gap in the side direction, and there are relatively large safety hazards.

[0003] To address the problem of the protection gap, fixed side protection devices are mostly used in related technologies to provide supplementary protection. However, the static structural characteristics of these devices will conflict with the dynamic opening and closing requirements of the wellhead in terms of space, and even affect the setting of the emergency evacuation passage, violating the safety requirements for passage. In addition, related technologies also use a hydraulically driven separable guardrail system to improve the protection device, but the cost is relatively high. The transformation cost per well needs to be increased by 120,000 - 150,000 yuan, and the required space is relatively large, requiring an additional installation space of 0.6 - 0.8 m 3 and has poor adaptability to the industrial site. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the present invention is to provide a bistable folding wellhead protection device, which can provide circumferential comprehensive protection for the well in the unfolded state and block and close the wellhead in the folded state, and while playing a comprehensive protection role, it will not occupy the space above the well.

[0005] The present application provides a bistable foldable wellhead protection device. The foldable wellhead protection device includes a base, a protection component, and a driving component. The base is disposed at the wellhead and forms two pairs of opposite sides. The protection component includes a first protection body, a second protection body, and a third protection body. The first protection body is configured as two and is rotatably disposed on a pair of opposite sides of the base. The second protection body is configured as two and is disposed on the other pair of opposite sides of the base. The third protection body connects the first protection body and the second protection body. The driving component is disposed on the base and connected to the first protection body, and is adapted to drive the first protection body to flip relative to the base. When the first protection body flips relative to the base, the second protection body is driven to rotate relative to the base through the third protection body, so as to be adapted to switch the foldable wellhead protection device between an unfolded state and a folded state. The foldable wellhead protection device is adapted to self-hold a stable state in both the unfolded state and the folded state. When the foldable wellhead protection device is in the unfolded state, the protection component forms a circumferential closed protection for the wellhead. When the foldable wellhead protection device is in the folded state, the first protection body and the second protection body are combined to close the wellhead.

[0006] According to the foldable wellhead protection device of the present application, it can provide circumferential comprehensive protection for the well in the unfolded state, and block and close the wellhead in the folded state. While playing a comprehensive protection role, it does not occupy the space above the well, does not affect passage and operation, has a reasonable layout and high space utilization rate. At the same time, the protection component can be automatically and efficiently folded or unfolded under the drive of the driving component, with simple and efficient operation, high flexibility, low cost, and can meet the high-frequency opening and closing requirements of the wellhead. Further, the foldable wellhead protection device of the present application has good stability and can self-hold a bistable state.

[0007] According to some embodiments of the present application, the first protection body includes a first main body, a first connection portion, and a second connection portion. The first main body is rotatably disposed on the base. The first connection portion and the second connection portion are respectively fixedly connected to both sides of the first main body. The second protection body includes a second main body, a third connection portion, and a fourth connection portion. The third connection portion and the fourth connection portion are respectively fixedly connected to both sides of the second main body. Wherein the first connection portion and the third connection portion are connected by a third protection body, and the second connection portion and the fourth connection portion are connected by a third protection body.

[0008] According to some embodiments of the present application, when the foldable wellhead protection device is in the unfolded state, the extension surface of the third protection body is parallel or coincident with the extension surface of the first main body, or parallel or coincident with the extension surface of the second main body.

[0009] According to some embodiments of the present application, the first connection portion and the third protection body are rotatably connected around a first rotation center, and the first rotation center is vertically disposed with respect to the rotation center of the first protection body. The third connection portion and the third protection body are rotatably connected around a second rotation center, and the second rotation center forms a 45° angle with the first rotation center.

[0010] According to some embodiments of the present application, when the foldable wellhead protection device is in a folded state, the two first bodies extend in a first direction and are close to each other to close a part of the wellhead; the two second bodies extend in a second direction and are close to the first bodies on the side in the second direction to close a part of the wellhead.

[0011] According to some embodiments of the present application, when the foldable wellhead protection device is in a folded state, the main planes of the first protection body, the second protection body, and the third protection body are parallel or coincident.

[0012] According to some embodiments of the present application, when the foldable wellhead protection device is in a folded state, at least part of the third connection portion, the third protection body, and part of the first connection portion overlap in the vertical direction; and the thickness of the third protection body is less than the thickness of the first protection body.

[0013] According to some embodiments of the present application, the foldable wellhead protection device further includes a bearing seat, and the bearing seat is arranged on a set of opposite sides of the base; an avoidance groove is formed on the side of the first body, a rotating shaft is arranged in the avoidance groove, and the rotating shaft is rotatably connected to the bearing seat.

[0014] According to some embodiments of the present application, the third protection body is made of an elastic material; the third protection body is adapted to deform to facilitate the switching of the foldable wellhead protection device between the unfolded state and the folded state.

[0015] According to some embodiments of the present application, the first protection body and / or the second protection body, and / or the third protection body are formed with a plurality of weight reduction holes.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0018] Figure 1 is a schematic diagram of the unfolded state of a foldable wellhead protection device according to some embodiments of the present application;

[0019] Figure 2 is a schematic diagram of the folded state of a foldable wellhead protection device according to some embodiments of the present application;

[0020] Figure 3 is a schematic diagram of the folding process of a foldable wellhead protection device according to some embodiments of the present application;

[0021] Figure 4It is a schematic structural diagram of a protection component according to some embodiments of the present application;

[0022] Figure 5 It is a schematic structural diagram of a first protection body according to some embodiments of the present application;

[0023] Figure 6 It is a schematic structural diagram of a second protection body according to some embodiments of the present application;

[0024] Figure 7 It is a schematic structural diagram of a third protection body according to some embodiments of the present application;

[0025] Figure 8 It is a schematic structural diagram of the folded state of the protection component according to some embodiments of the present application;

[0026] Figure 9 It is a schematic structural diagram of a driving component according to some embodiments of the present application.

[0027] Reference signs:

[0028] Base 10; Protection component 20;

[0029] First protection body 21; First main body 211; First connecting portion 212; Second connecting portion 213; Rotating shaft 214; Second protection body 22; Second main body 221; Third connecting portion 222; Fourth connecting portion 223; Third protection body 23;

[0030] Driving component 30; Driving member 31; First driving rod 32; Second driving rod 33; Connecting seat 34;

[0031] Bearing seat 40. Detailed implementation manners

[0032] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0033] Reference will be made below to Figures 1-9 Describe a bistable folding wellhead protection device according to an embodiment of the present invention.

[0034] The present application provides a bistable foldable wellhead protection device. The foldable wellhead protection device includes a base 10, a protection component 20, and a driving component 30. The base 10 is disposed at the wellhead, and the base 10 forms two pairs of opposite sides; the protection component 20 includes a first protection body 21, a second protection body 22, and a third protection body 23. The first protection body 21 is configured as two and is rotatably disposed on a pair of opposite sides of the base 10; the second protection body 22 is configured as two and is disposed on the other pair of opposite sides of the base 10; the third protection body 23 connects the first protection body 21 and the second protection body 22; the driving component 30 is disposed on the base 10 and is connected to the first protection body 21. The driving component 30 is adapted to drive the first protection body 21 to flip relative to the base 10; when the first protection body 21 flips relative to the base 10, the second protection body 22 is driven to rotate relative to the base 10 through the third protection body 23, so as to be adapted to switch the foldable wellhead protection device between an unfolded state and a folded state. The foldable wellhead protection device is adapted to self-hold a stable state in both the unfolded state and the folded state; when the foldable wellhead protection device is in the unfolded state, the protection component 20 forms a circumferential closed protection for the wellhead; when the foldable wellhead protection device is in the folded state, the first protection body 21 and the second protection body 22 are combined to close the wellhead.

[0035] According to the foldable wellhead protection device of the present application, when the foldable wellhead protection device is in the unfolded state, the driving component 30 forms a circumferential continuous structure at the wellhead to provide circumferential protection and prevent well-drop accidents, such as Figure 1 shown; when the foldable wellhead protection device is in the folded state, the first protection body 21 and the second protection body 22 are combined to close the wellhead to prevent well-drop accidents, such as Figure 2 shown. Further, when the foldable wellhead protection device is in the folded state, the first protection body 21 drives the second protection body 22 and the third protection body 23 to fold and store, without affecting the use of the space above the well. The folding process of the foldable wellhead protection device is as shown in Figure 3 shown. The driving component 30 drives the protection component 20 to move. The first protection body 21 flips towards the well inside relative to the base 10, and at the same time drives the second protection body 22 and the third protection body 23 to move, so that the second protection body 22 flips towards the well inside relative to the base 10.

[0036] In addition, due to the motion coupling between the first protective body 21, the second protective body 22 and the third protective body 23, the first protective body 21 is restricted by the second protective body 22 and the third protective body 23, and they cannot move relative to each other arbitrarily. Considering the effects of gravity, the base 10, and the driving assembly 30 on the protective assembly 20, the foldable wellhead protection device has bistability, that is, it can self-retain its structural form in both the deployed state and the folded state, making it have good stability without the need for an additional locking structure. Specifically, in the deployed state, the driving assembly 30 can restrict the form of the first protective body 21. Combining the mutual restrictions between the structures of the protective assembly, the overall form of the foldable wellhead protection device is fixed and can self-retain its stable state. In the folded state, due to the effects of gravity, the support of the base 10, the restriction of the driving assembly 30, and the mutual restrictions between the structures, the overall form of the foldable wellhead protection device is fixed and can self-retain its stable state. At the same time, since the driving assembly 30 can apply a holding force to the first protective body 21, the foldable wellhead protection device of the present application has a high ability to resist external forces and interference.

[0037] According to the foldable wellhead protection device of the present application, it can provide comprehensive circumferential protection for the well in the deployed state and block and close the wellhead in the folded state. While playing a comprehensive protection role, it does not occupy the space above the well, does not affect passage and operation, has a reasonable layout and high space utilization rate. At the same time, the protective assembly 20 can be automatically folded or deployed efficiently under the drive of the driving assembly 30, with simple and efficient operation, high flexibility, low cost, and can meet the high-frequency opening and closing requirements of the wellhead. Further, the foldable wellhead protection device of the present application has good stability and can self-retain bistability.

[0038] In some embodiments, the base 10 is configured as an installation platform with a rectangular cross-section and a hollow interior, wrapping the square deep well wellhead.

[0039] According to some embodiments of the present application, the first protective body 21 includes a first main body 211, a first connecting portion 212, and a second connecting portion 213. The first main body 211 is rotatably arranged on the base 10. The first connecting portion 212 and the second connecting portion 213 are respectively fixedly connected to both sides of the first main body 211. The second protective body 22 includes a second main body 221, a third connecting portion 222, and a fourth connecting portion 223. The third connecting portion 222 and the fourth connecting portion 223 are respectively fixedly connected to both sides of the second main body 221. Among them, the first connecting portion 212 and the third connecting portion 222 are connected by a third protective body 23, and the second connecting portion 213 and the fourth connecting portion 223 are connected by a third protective body 23. In this embodiment, as Figures 4-8As shown, both sides of the first protective body 21 are connected to the second protective body 22 through the third protective body 23, thereby forming a circumferentially continuous structure. Among them, the first protective body 21 includes a first main body 211 and a first connecting portion 212 and a second connecting portion 213 fixedly arranged on both sides of the first main body 211. The second protective body 22 includes a second main body 221 and a third connecting portion 222 and a fourth connecting portion 223 fixedly arranged on both sides of the second main body 221. The first connecting portion 212 is connected to the third connecting portion 222 through the third protective body 23, and the second connecting portion 213 is connected to the fourth connecting portion 223 through the third protective body 23. In this way, the first protective body 21 and the second protective body 22 are more easily fitted and connected, and the structures of the first connecting portion 212, the second connecting portion 213 and the first main body 211 can be set differently, such as different thicknesses, different materials, etc., so that the adaptability of the structure is higher.

[0040] Further, the side edges of the first connecting portion 212 and the second connecting portion 213 close to the base 10 are flush with the side edges of the first main body 211 close to the base 10, and the side edges of the third connecting portion 222 and the fourth connecting portion 223 close to the base 10 are flush with the side edges of the second main body 221 close to the base 10.

[0041] According to some embodiments of the present application, when the folding wellhead protection device is in the unfolded state, the extension surface of the third protective body 23 is parallel or coincident with the extension surface of the first main body 211, or parallel or coincident with the extension surface of the second main body 221. In this embodiment, when the folding wellhead protection device is in the unfolded state, the third protective body 23, the first protective body 21 and the second protective body 22 enclose a rectangular continuous boundary to provide circumferential comprehensive protection for the wellhead, making the structure more regular. Further, the extension surface of the third protective body 23 of this embodiment is parallel or coincident with the first main body 211 or the second main body 221 in the unfolded state, which can form a structural dead point, improve the stability and anti-interference ability of the structure, and enhance the effect of the folding wellhead protection device to maintain a steady state by itself.

[0042] According to some embodiments of the present application, the first connecting portion 212 and the third protective body 23 are rotatably connected about a first rotation center, and the first rotation center is perpendicularly arranged with respect to the rotation center of the first protective body 21; the third connecting portion 222 and the third protective body 23 are rotatably connected about a second rotation center, and the second rotation center forms a 45° angle with the first rotation center. In this embodiment, with the above arrangements of the first rotation center and the second rotation center, when the folding wellhead protection device is in the deployed state, the first protective body 21 and the second protective body 22 are perpendicular to the ground, which can achieve a good circumferential protection effect; in the folded state, the first rotation center can coincide with or be parallel to the rotation center of the second protective body 22 relative to the base 10, making it convenient to fold and store the protection assembly. The folding wellhead protection device of this embodiment has a regular structure, is easy to switch states and is easy to cooperate with structures such as the base 10.

[0043] Furthermore, when the folding wellhead protection device is in the deployed state, since the protection assembly is perpendicular to the ground, it can maintain a stable shape by relying on its own gravity, and there is no need for the driving assembly 30 to apply a holding force; when the protection assembly is disturbed, the driving assembly 30 can play a limiting role on the protection assembly and apply a holding force to resist the disturbance.

[0044] In some embodiments, as Figures 1-8 shown, the cross-sections of the first main body 211 and the second main body 221 are rectangular, the cross-section of one of the first connecting portion 212 and the third connecting portion 222 is square, and the cross-section of the other is an isosceles right triangle; the cross-section of one of the second connecting portion 213 and the fourth connecting portion 223 is square, and the cross-section of the other is an isosceles right triangle. The cross-section of the third protective body 23 is an isosceles right triangle. The extending lengths of the first main body 211 and the second main body 221 are determined according to the size of the wellhead.

[0045] Furthermore, as Figure 4 、 Figure 8 shown, the folding wellhead protection device as a whole is a centrosymmetric structure. The structural forms of the second connecting portion 213 and the third connecting portion 222 are the same, and the structural forms of the first connecting portion 212 and the fourth connecting portion 223 are the same; the connection relationship between the first connecting portion 212 and the third connecting portion 222 is the same as the connection relationship between the second connecting portion 213 and the fourth connecting portion 223.

[0046] Furthermore, the side lengths of the first connecting portion 212 and the second connecting portion 213 close to the base 10 are one-third of the side length of the first main body 211 close to the base 10.

[0047] According to some embodiments of the present application, when the foldable wellhead protection device is in the folded state, the two first bodies 211 extend in the first direction and are close to each other to close a part of the wellhead; the two second bodies 221 extend in the second direction and are close to the sides of the first body 211 in the second direction to close a part of the wellhead. As Figure 2 shown, the first direction is perpendicular to the second direction. In this embodiment, the first bodies 211 are close to each other in the first direction to block a part of the wellhead, the second bodies 221 block the parts of the wellhead on both sides of the first body 211, and the first connecting portion 212, the second connecting portion 213, the third connecting portion 222 or the fourth connecting portion 223 block the remaining part of the wellhead. The structural distribution of each part is as Figure 2 shown. Such a setting makes the structures of the first body 211 and the second body 221 simple, easy to process and cooperate, and not prone to structural interference or jamming during the state switching process.

[0048] Further, when the foldable wellhead protection device is in the folded state, the maximum extension lengths of the first connecting portion 212 and the second connecting portion 213 protruding from the side of the first body 211 in the second direction are equal to the extension length of the second body 221 in the second direction. The first connecting portion 212, the second connecting portion 213 and the second body 221 cooperate to block and close the wellhead for the vacant parts on both sides of the first body 211.

[0049] Furthermore, when the foldable wellhead protection device is in the folded state, the maximum extension lengths of the first connecting portion 212 and the second connecting portion 213 in the first direction are equal to the extension length of the first body 211 in the second direction, so that when the foldable wellhead protection device is unfolded, the heights of the parts of the protection assembly 20 other than the first body 211 are equal, which is convenient for better exerting the protection effect and facilitating the cooperation between structures to achieve folding.

[0050] According to some embodiments of the present application, when the foldable wellhead protection device is in the folded state, the main planes of the first protection body 21, the second protection body 22 and the third protection body 23 are parallel or coincident. In this embodiment, the main plane refers to the structural plane with the largest area. The main planes of the first protection body 21, the second protection body 22 and the third protection body 23 are parallel or coincident, that is, the main plane is parallel to the base 10 or the ground. In this way, the surfaces of the first protection body 21, the second protection body 22 and the third protection body 23 that are close to each other after folding are in closer contact, and the stability of the foldable wellhead protection device in the folded state is higher. Further, when the foldable wellhead protection device is in the folded state, the upper surfaces of the first protection body 21 and the second protection body 22 are in the same plane, and the upper surface of the foldable wellhead protection device is flatter.

[0051] According to some embodiments of the present application, when the foldable wellhead protection device is in a folded state, at least a part of the third connecting portion 222, the third protection body 23, and a part of the first connecting portion 212 overlap in the vertical direction in sequence; and the thickness of the third protection body 23 is less than the thickness of the first protection body 21. In this embodiment, as Figures 1-3 shown, at least a part of the third connecting portion 222, the third protection body 23, and a part of the first connecting portion 212 overlap in the vertical direction in sequence. In some embodiments, as Figure 3 , Figure 8 shown, the third protection body 23 folds and covers the third connecting portion 222, and the first connecting portion 212 folds and covers the third protection body 23, so as to realize the sequential folding of the three.

[0052] In order to make the upper surface of the foldable wellhead protection device as flat as possible in the folded state, the folding thicknesses of the third connecting portion 222, the third protection body 23, and the first connecting portion 212 should be as equal as possible to the thickness of the first main body 211. Therefore, the thickness of the third protection body 23 should be less than the thickness of the first protection body 21. In some embodiments, the thicknesses of the third connecting portion 222, the third protection body 23, and the first connecting portion 212 can be constructed to be one-third of the thickness of the first main body 211; in some embodiments, considering that there may be partial overlap of the third connecting portion 222, the third protection body 23, and the first connecting portion 212 in the horizontal direction, the thickness of any one of the third connecting portion 222, the third protection body 23, and the first connecting portion 212 can exceed one-third of the thickness of the first main body 211, but should be less than the thickness of the first main body 211. In practice, the thicknesses of the respective parts of the protection assembly 20 should be flexibly designed and adjusted according to needs in combination with the cooperation relationship of the structures.

[0053] According to some embodiments of the present application, the foldable wellhead protection device further includes a bearing seat 40, and the bearing seat 40 is arranged on a set of opposite sides of the base 10; a relief groove is formed on the side of the first main body 211, and a rotating shaft 214 is arranged in the relief groove, and the rotating shaft 214 is rotatably connected to the bearing seat 40. In this embodiment, by arranging the bearing seat 40 to provide stable support for the protection assembly 20, and the bearing seat 40 and the rotating shaft 214 are arranged on the side of the first main body 211 and cooperate with the relief groove, it is possible to avoid affecting the deformation process of the protection assembly 20. In some embodiments, as Figure 1 shown, the bearing seat 40 is arranged in the exact middle of the side of the base 10 where the first protection body 21 is located, so as to maintain the balance and stability of the first protection body 21 during the rotation process.

[0054] According to some embodiments of the present application, the third protective body 23 is made of an elastic material; the third protective body 23 is adapted to deform so as to be adapted to the switching between the unfolded state and the folded state of the folding wellhead protection device. To improve the flexibility of the state switching of the folding wellhead protection device, the third protective body 23 is made of a material with good elastic performance, and can undergo small deformations during the state switching of the folding wellhead protection device, dynamically adjusting the geometric relationship of the structure, avoiding phenomena such as structural jamming, so as to adapt to the movement transmission of the structure.

[0055] According to some embodiments of the present application, the first protective body 21 and / or the second protective body 22, and / or the third protective body 23 are formed with a plurality of weight-reducing holes. In this embodiment, by providing the weight-reducing holes, the structural weight can be reduced on the basis of ensuring sufficient structural strength and good protective effect, thereby facilitating control and movement, and at the same time reducing costs.

[0056] In some embodiments, the first main body 211 can be constructed as a protective plate and provided with a plurality of weight-reducing holes; the second main body 221, the third protective body 23, the first connecting portion 212, the second connecting portion 213, the third connecting portion 222, and the fourth connecting portion 223 are constructed as a frame structure including a plurality of reinforcing beams, and the weight-reducing holes are formed between adjacent reinforcing beams.

[0057] According to some embodiments of the present application, as Figure 9 shown, the driving assembly 30 includes a driving member 31, a first driving rod 32, a second driving rod 33, and a connecting seat 34; the driving member 31 is disposed on the inner wall of the base 10, and the connecting seat 34 is disposed on the first protective body 21; the output end of the driving member 31 is connected to one end of the first driving rod 32, the other end of the first driving rod 32 is connected to one end of the second driving rod 33, and the other end of the second driving rod 33 is rotatably connected to the connecting seat 34. In this embodiment, the driving member 31 drives the first driving rod 32 to rotate, and drives the first protective body 21 to rotate relative to the base 10 through the second driving rod 33.

[0058] In some embodiments, the driving assembly 30 can also be disposed on the bearing seat 40 to control the rotation of the rotating shaft 214 relative to the bearing seat 40, thereby driving the first protective body 21 to flip.

[0059] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0060] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features.

[0061] In the description of the present invention, the meaning of "a plurality of" is two or more.

[0062] In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0063] In the description of the present invention, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature.

[0064] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0065] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A bistable folding wellhead protection device, characterized in that, Comprising: A base, which is arranged at the wellhead, and the base forms two pairs of opposite sides; A protection assembly, which includes a first protection body, a second protection body and a third protection body. The first protection body is configured to be two and is rotatably arranged on a pair of opposite sides of the base; the second protection body is configured to be two and is arranged on the other pair of opposite sides of the base; The third protection body connects the first protection body and the second protection body; A driving assembly, which is arranged on the base and connected to the first protection body to be adapted to drive the first protection body to flip relative to the base; Wherein When the first protection body flips relative to the base, the third protection body drives the second protection body to rotate relative to the base, so as to be adapted to switch the folding wellhead protection device between the unfolded state and the folded state, and the folding wellhead protection device is adapted to self-hold a stable state in the unfolded state and the folded state; When the folding wellhead protection device is in the unfolded state, the protection assembly forms a circumferential closed protection for the wellhead; when the folding wellhead protection device is in the folded state, the first protection body and the second protection body are combined to close the wellhead.

2. The bistable foldable wellhead protection device according to claim 1, wherein, The first protection body includes a first main body, a first connection part and a second connection part. The first main body is rotatably arranged on the base; the first connection part and the second connection part are respectively fixedly connected to both sides of the first main body; The second protection body includes a second main body, a third connection part and a fourth connection part. The third connection part and the fourth connection part are respectively fixedly connected to both sides of the second main body; wherein The first connection part and the third connection part are connected by one of the third protection bodies, and the second connection part and the fourth connection part are connected by one of the third protection bodies.

3. The bistable foldable wellhead protection device according to claim 2, wherein, When the folding wellhead protection device is in the unfolded state, the extension plane of the third protection body is parallel or coincident with the extension plane of the first main body, or parallel or coincident with the extension plane of the second main body.

4. The bistable foldable wellhead protection device according to claim 3, characterized in that, The first connection part and the third protection body are rotatably connected around a first rotation center, and the first rotation center is vertically arranged with respect to the rotation center of the first protection body; The third connection part and the third protection body are rotatably connected around a second rotation center, and the second rotation center forms a 45° angle with the first rotation center.

5. The bistable foldable wellhead protection device according to claim 2, wherein, When the folding wellhead protection device is in the folded state, the two first main bodies extend in a first direction and are close to each other to close a part of the wellhead; the two second main bodies extend in a second direction and are close to the side surface of the first main body in the second direction to close a part of the wellhead.

6. The bistable foldable wellhead protection device according to claim 2, characterized in that, When the folding wellhead protection device is in the folded state, the main planes of the first protection body, the second protection body and the third protection body are parallel or coincident.

7. The bistable foldable wellhead protection device according to claim 2, wherein, When the folding wellhead protection device is in the folded state, at least part of the third connection part, the third protection body and part of the first connection part overlap in the vertical direction; and the thickness of the third protection body is less than the thickness of the first protection body.

8. The bistable foldable wellhead protection device according to claim 2, wherein, Further comprising: The bearing seat is arranged on a pair of opposite sides of the base; An avoidance groove is formed on the side of the first main body, and a rotating shaft is arranged in the avoidance groove, and the rotating shaft is rotatably connected to the bearing seat.

9. The bistable foldable wellhead protection device according to claim 1, wherein, The third protective body is made of an elastic material; the third protective body is adapted to deform so as to be adapted to the switching of the folding wellhead protection device between the unfolded state and the folded state.

10. The bistable foldable wellhead protection device according to claim 1, characterized in that, The first protective body and / or the second protective body, and / or the third protective body are formed with a plurality of weight reduction holes.

Images