Joint mechanism and downhole tool detection device with same

Abstract

The invention relates to a joint mechanism and a downhole tool detection device with the same. The joint mechanism comprises a working platform, a lifting mechanism, a pushing mechanism and a fixed platform, the working platform is provided with an inner cavity, a boss is assembled at the lower end of the working platform, the pushing mechanism is installed in the boss, the upper end of the pushing mechanism extends into the inner cavity of the working platform, and the lifting mechanism is installed in the inner cavity of the working platform and matched with the upper end of the pushing mechanism. The fixing platform is a shell base matched with the boss, arranged outside the boss and connected with the lower end of the pushing mechanism, a rebound mechanism is arranged between the pushing mechanism and the boss, the lifting mechanism is used for making contact with the upper end of the pushing mechanism, pushing the pushing mechanism downwards and compressing the rebound mechanism, and a first operator fixing device is arranged at the lower end of the fixing platform. The device has the advantages that through the joint mechanism, a worker on the fixed platform can quickly and safely arrive at the underground deep position to carry out an operation task needing to be completed.

Description

Technical Field

[0001] The invention relates to the technical field of natural gas and oil exploitation, and in particular to a joint mechanism and a downhole tool detection device having the same. Background Art

[0002] The downhole tool detection device is a device used to detect various tools used in oil extraction and drilling operations. It mainly tests the physical, electrical, and magnetic properties of the tool to verify whether its performance meets the specified standards, thereby ensuring the safety and efficiency of downhole operations and reducing the risk of accidents.

[0003] However, there is currently a lack of reliable equipment for detecting whether the downhole tool has reached a preset position in the well. At present, in most cases, the position of the downhole tool can only be determined by experience, which has low accuracy. In some cases, the position of the downhole tool in the well may also be indirectly calculated based on parameters such as the fluid pressure in the well, the friction between the downhole tool and the well, the weight of the downhole tool, and time, which also has the problem of low accuracy.

[0004] In order to solve the above problems, for example, a Chinese patent, with the announcement number: CN109538192A, discloses a downhole tool detection device. The downhole tool detection device provided by the embodiment of the invention is used to be connected to the wellbore of an oil and gas well, and the contact head extends into the wellbore. When the downhole tool moves to the contact head, the downhole tool applies pressure to the contact head, forcing the contact head to move in the direction of the position detector. The contact head approaches the position detector and then drives the trigger to approach the position detector. At this time, the position detector outputs a position detection signal, and the position where the downhole tool reaches the downhole tool detection device can be determined based on the position detection signal.

[0005] However, in actual use, most of today's downhole tool detection devices are unable to achieve remote or unattended vibration monitoring underground, which will bring potential risks to physical safety in environments such as industrial production and mining operations. For example, if there are unexpected events such as collapse, earthquake, explosion, fire, etc., even if they can be discovered in time when no one is around, emergency measures and rescue actions cannot be taken immediately; at the same time, if the downhole tool detection device cannot be used to enable workers on the fixed platform to quickly and safely reach deep underground locations, it will not only affect the stability and efficiency of industrial production and mining operations, but will also threaten the lives of underground workers.

[0006] Therefore, it is necessary to develop a joint mechanism and related detection devices to solve the above problems. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a joint mechanism and a downhole tool detection device having the same, which effectively overcomes the defects of the prior art.

[0008] The technical solution of the present invention to solve the above technical problems is as follows:

[0009] A joint mechanism includes a working platform, a lifting mechanism, a pushing mechanism and a fixed platform. The working platform has an inner cavity. The lower end of the working platform is equipped with a boss. The pushing mechanism is installed in the boss, and the upper end extends into the inner cavity of the working platform. The lifting mechanism is installed in the inner cavity of the working platform and cooperates with the upper end of the pushing mechanism. The fixed platform is a shell seat adapted to the boss, and is arranged on the outside of the boss and connected to the lower end of the pushing mechanism. A rebound mechanism is provided between the pushing mechanism and the boss. The lifting mechanism is used to contact the upper end of the pushing mechanism, push the pushing mechanism downward, and compress the rebound mechanism. A first operator fixing device is provided at the lower end of the fixed platform.

[0010] Based on the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the lower part of the above-mentioned boss is configured to be a cone-shaped, and the above-mentioned boss is provided with an assembly hole extending vertically to its upper end. The above-mentioned pushing mechanism is installed in the above-mentioned assembly hole, and its lower end passes through the lower end of the above-mentioned boss. The above-mentioned fixed platform is a cone-shaped platform with a hollow interior. The above-mentioned fixed platform can move upward with the above-mentioned pushing mechanism to be wrapped outside the above-mentioned boss, or move downward to be separated from the above-mentioned boss.

[0012] Furthermore, the push mechanism comprises a vertical push rod, a limit block is provided in the middle of the push rod, and the rebound mechanism is connected between the limit block and the bottom of the assembly hole.

[0013] Furthermore, an auxiliary platform horizontally extending to all sides of the fixed platform is fixed on the upper part of the fixed platform, and a second operator fixing device and a mechanical arm are provided at the lower end of the auxiliary platform.

[0014] Furthermore, the lifting mechanism is connected to a vertical guide rod, the lower end of which passes through the bottom of the working platform and is connected and fixed to the auxiliary platform.

[0015] Furthermore, a cardboard base is fixed to the bottom of the working platform, the upper end of the boss is embedded in a matching hole on the cardboard base, and the lower end of the guide connecting rod passes through the cardboard base.

[0016] The lifting mechanism comprises a push rod, a push plate, a guide rod and a slide plate. The push rod is vertically arranged, and its upper end passes through the top of the inner cavity of the working platform. The push rod is horizontally arranged and is connected and fixed with the lower end of the push rod. The lower end of the push plate is provided with a slide groove extending to one end thereof, and the slide plate is horizontally assembled in the slide groove. The guide rod is inclinedly arranged, and its lower end is connected and fixed with the bottom wall of the inner cavity of the working platform. One end of the slide plate is provided with a guide hole obliquely passing through it, and one end of the push plate is provided with an opening that passes through the guide hole. The upper end of the guide rod passes through the guide hole and extends into the opening, and the lower end of the other end of the push plate is provided with an extrusion slope surface, and the push rod is used to drive the push plate to move up and down under the action of external force, so that the slide plate slides horizontally along the guide rod and the slide groove, and when the push rod moves downward, the other end of the slide slides horizontally toward the upper end of the pushing mechanism and squeezes the pushing mechanism downward to move.

[0017] Furthermore, the bottom wall of the slide groove is provided with a plurality of continuous slots, the slots all extend toward both sides of the push plate, and the plurality of slots are continuously distributed along both ends of the push plate, the longitudinal section of the slot is arc-shaped, and a positioning hole is provided at the upper part of the other end of the slide plate, and a limiting ball in contact with the bottom wall of the slide groove is installed in the positioning hole through an elastic member, and during the horizontal movement of the slide plate, the limiting ball can move to any one of the slots.

[0018] The beneficial effect is that the joint mechanism can enable the workers on the fixed platform to quickly and safely reach the deep position underground to carry out the work tasks that need to be completed.

[0019] A downhole tool detection device is also provided, comprising a joint mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural cross-sectional view of the joint mechanism of the present invention.

[0021] Figure 2 It is a structural cross-sectional view of the joint mechanism of the present invention when in use.

[0022] Figure 3 for Figure 2 A magnified view of the structure at center.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Working platform; 2. Lifting mechanism; 3. Pushing mechanism; 4. Fixed platform; 5. Boss; 6. Rebound mechanism; 7. Auxiliary platform; 8. Guide connecting rod; 11. Card base; 21. Push rod; 22. Push plate; 23. Guide rod; 24. Slide plate; 25. Card slot; 31. Push rod; 32. Limit block; 241. Limit ball. DETAILED DESCRIPTION

[0025] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0026] Example 1

[0027] like Figure 1 and 2 As shown, the joint mechanism of this embodiment includes a working platform 1, a lifting mechanism 2, a pushing mechanism 3 and a fixed platform 4. The working platform 1 has an inner cavity D. The lower end of the working platform 1 is equipped with a boss 5. The pushing mechanism 3 is installed in the boss 5, and the upper end extends into the inner cavity of the working platform 1. The lifting mechanism 2 is installed in the inner cavity of the working platform 1 and cooperates with the upper end of the pushing mechanism 3. The fixed platform 4 is a shell seat adapted to the boss 5, and is arranged on the outside of the boss 5 and connected to the lower end of the pushing mechanism 3. A rebound mechanism 6 is provided between the pushing mechanism 3 and the boss 5. The lifting mechanism 2 is used to contact the upper end of the pushing mechanism 3, push the pushing mechanism 3 downward, and compress the rebound mechanism 6. The lower end of the fixed platform 4 is provided with a first operator fixing device.

[0028] During use, a cylinder or oil cylinder is provided on the top of the working platform 1, and the rod of the cylinder or oil cylinder is connected to the lifting mechanism 2 to provide lifting power for the lifting mechanism 2. Before use, the operator fixes himself at the lower end of the fixed platform 4 through the first operator fixing device, and drives the lifting mechanism 2 to descend by controlling the extension of the cylinder or oil cylinder, thereby pushing the push mechanism 3 downward. During the downward movement, the push mechanism 3 drives the fixed platform 4 to move downward, thereby transporting the staff at the lower end of the fixed platform 4 to the deep position underground for work. When the work is completed, the cylinder or oil cylinder is controlled to move back (upward), and the push mechanism 3 moves upward under the elastic force of the rebound mechanism 6. The push mechanism 3 drives the fixed platform 4 to move upward, thereby moving the lower end of the fixed platform 4, thereby driving the staff at the lower end of the fixed platform 4 to the initial position of the operation. The whole joint mechanism is reasonably designed, so that the staff on the fixed platform can quickly and safely reach the deep position underground and perform the tasks that need to be completed.

[0029] In this embodiment, the first operator fixing device can adopt a structure in which a frame and a binding belt cooperate. Specifically, the frame is installed at the lower end of the fixed platform 4, and the binding belt is installed on the frame, which can restrain the operator's body to the frame, thereby ensuring the safety of the operator when performing underground operations.

[0030] As a preferred embodiment, the lower part of the above-mentioned boss 5 is set to be a cone shape, and the above-mentioned boss 5 is provided with an assembly hole c extending vertically to its upper end. The above-mentioned pushing mechanism 3 is installed in the above-mentioned assembly hole, and its lower end passes through the lower end of the above-mentioned boss 5. The above-mentioned fixed platform 4 is a cone-shaped platform with a hollow interior. The above-mentioned fixed platform 4 can move upward with the above-mentioned pushing mechanism 3 to be wrapped outside the above-mentioned boss 5, or move downward to separate from the above-mentioned boss 5.

[0031] In the above implementation scheme, in the initial state, the fixed platform 4 is sleeved on the outside of the boss 5, and the two are tightly matched and will not shift horizontally, which is conducive to the operator moving to the lower end of the fixed platform 4 and fixing the body. When it is necessary to go down the well, the fixed platform 4 can move downward smoothly relative to the boss 5.

[0032] As a preferred embodiment, the push mechanism 3 includes a vertical push rod 31, a limit block 32 is provided in the middle of the push rod 31, and the rebound mechanism 6 is connected between the limit block 32 and the bottom of the assembly hole.

[0033] In the above embodiment, the push mechanism 3 uses a simple push rod 31 as a core component, and its structural design is simple. Moreover, through the design of the limit block 32, the rebound mechanism 6 can be stably assembled. Specifically, the rebound mechanism 6 is a spring, and is sleeved outside the push rod 31. Its upper and lower ends are respectively connected to the limit block 32 and the bottom of the assembly hole. When the push rod 31 is driven by the lifting mechanism 2 to move downward, the rebound mechanism 6 is compressed and deformed to store force. When the driving state of the lifting mechanism 2 and the push rod 31 is released (that is, when the lifting mechanism 2 moves upward and returns to its original position), the rebound mechanism 6 can restore the deformation and drive the limit block 32 and the push rod 31 to move upward and return to their original position through elastic force. Its structural design is relatively simple and reasonable, and it is easy to operate and use.

[0034] As a preferred embodiment, an auxiliary platform 7 horizontally extending to the surrounding areas is fixedly mounted on the upper part of the fixed platform 4, and a second operator fixing device and a mechanical arm are disposed at the lower end of the auxiliary platform 7.

[0035] In the above-mentioned implementation scheme, a device similar in structure to the first operator fixing device is arranged at the lower end of the auxiliary platform 7, and a mechanical arm is provided. Before work, the staff can be fixed at the lower end of the auxiliary platform 7 by the second operator fixing device, so as to ensure their safety when performing work. During the downward movement of the lifting mechanism 2, the auxiliary platform 7 moves downward synchronously with the fixed platform 4, and the staff on the auxiliary platform 7 can perform work requirements at the shallow position underground. At the same time, the staff on the auxiliary platform 7 can also provide necessary demand support for the staff on the fixed platform 4, and the two parties can work together and cooperate with each other to ensure construction efficiency and safety. At the same time, in an emergency, the auxiliary platform 7 can also play the role of contact transfer to ensure smooth communication between all staff members underground, avoid the situation where the staff on the fixed platform 4 lose contact with the ground due to being too deep, and reduce the occurrence of accidents. In general, this design can improve the safety and production efficiency of underground work. In addition, the lower end of the auxiliary platform 7 is fixedly connected with a mechanical arm by bolts (the mechanical arm is connected to the controller signal, and the specific structure of the mechanical arm can refer to the patent with announcement number CN111590554A), and the staff on the auxiliary platform 7 can pass the required items to the staff on the fixed platform 4 through the mechanical arm to provide assistance to the staff on the fixed platform 4. Through the application of the mechanical arm, automated item delivery and processing operations can be realized, and errors and labor intensity problems existing in the process of the staff can be avoided; the mechanical arm has the characteristics of high speed and precision, and can quickly and accurately transfer items to the required position, thereby improving work efficiency and reducing working time; through the application of the mechanical arm, some repetitive and dangerous work can be eliminated, and the safety and comfort of the workplace can be improved.

[0036] As a preferred embodiment, the lifting mechanism 2 is connected with a vertical guide rod 8 , the lower end of the guide rod 8 passes through the bottom of the working platform 1 , and is connected and fixed to the auxiliary platform 7 .

[0037] In the above embodiment, during operation, the lifting mechanism 2 drives the guide link 8 to move downward, thereby driving the auxiliary platform 7 connected to the guide link 8 to descend synchronously with the fixed platform 4, meeting the needs of the workers on the auxiliary platform 7 and the fixed platform 4 to work together. In addition, the structural design can effectively ensure the synchronous movement of the auxiliary platform 7 and the fixed platform 4, and the installation of the auxiliary platform 7 is more stable.

[0038] In this embodiment, a cardboard base 11 is also fixed to the bottom of the working platform 1, and the upper end of the boss 5 is embedded in the adapted hole on the cardboard base 11, and the lower end of the guide connecting rod 8 passes through the cardboard base 11. A limiting groove 1 with a larger hole diameter than the cardboard base 11 is provided on the upper edge of the hole of the cardboard base 11, and a flange 1 is provided on the upper edge of the boss 5, and the flange 1 is snapped into the limiting groove 1, so that the assembly of the boss 5 is more secure. In addition, a positioning hole is provided on the auxiliary platform 7, and the fixed platform 4 passes through the positioning hole, and a limiting groove 2 with a larger hole diameter than the cardboard base 11 is provided at the lower edge of the positioning hole, and a flange 2 is provided on the outer periphery of the upper end of the fixed platform 4, and the flange 2 is snapped into the limiting groove 2. The assembly of the fixed platform 4 and the auxiliary platform 7 is made tighter, and the two will not be skewed relative to each other.

[0039] As a preferred embodiment, the lifting mechanism 2 includes a push rod 21, a push plate 22, a guide rod 23 and a slide plate 24. The push rod 21 is vertically arranged, and its upper end passes through the top of the inner cavity of the working platform 1. The push rod 21 is horizontally arranged and connected and fixed with the lower end of the push rod 21. The lower end of the push plate 22 is provided with a slide groove a extending to one end thereof. The slide plate 24 is horizontally assembled in the slide groove. The guide rod 23 is tilted, and its lower end is connected and fixed with the bottom wall of the inner cavity of the working platform 1. One end of the slide plate 24 is provided with an inclined penetrating The guide hole is provided at one end of the push plate 22, and an opening is provided which is connected with the guide hole. The upper end of the guide rod 23 passes through the guide hole and extends into the opening. The lower end of the other end of the push plate 22 is provided with an extrusion slope surface. The push rod 21 is used to drive the push plate 22 to move up and down under the action of external force, so that the slide plate 24 slides horizontally along the guide rod 23 and the slide groove, and when the push rod 21 moves downward, the other end of the slide plate 24 slides horizontally toward the upper end of the push mechanism 3, and squeezes the push mechanism 3 downward to move.

[0040] In the above-mentioned implementation scheme, when in use, the worker fixes himself on the first worker fixing device (that is, the lower end of the fixed platform 4), and starts the air cylinder or oil cylinder through the controller, and the air cylinder or oil cylinder drives the push rod 21, and the push rod 21 drives the push plate 22. When the push plate 22 moves downward, it moves along the guide rod 23. Since the guide rod 23 is inserted into the guide hole (oblique hole) of the slide plate 24, the slide plate 24 will be pulled by the guide rod 23 to move along the slide groove; when the slide plate 24 moves to the other end close to the upper end of the push mechanism 3, it will gradually squeeze from the side. The push plate 22 is pressed into the upper end of the push mechanism 3, and the push mechanism 3 is pushed downward as the push plate 22 moves downward. The push mechanism 3 drives the fixed platform 4 to move downward, thereby transporting the staff on the fixed platform 4 to a deep position underground for work. When the work is completed, the cylinder or oil cylinder moves back, and the push plate 22 is pulled back by the guide rod 23 and the push rod 21 moves upward. Under the elastic force of the rebound mechanism 6, the push mechanism 3 and the fixed platform 4 are driven to move upward until they return to the position before the initial operation. The whole structure is reasonably designed and the construction efficiency is improved. Through the coordinated operation of the guide rod 23, the slide plate 24 and the guide rod 23, accurate positioning and movement are achieved, so that the staff on the fixed platform 4 can quickly and safely reach the deep position underground and perform the work tasks that need to be completed. For mines with greater depths, it can also avoid the safety hazards of staff climbing and sinking to the greatest extent, and effectively reduce the probability of various risks and threats during underground operations.

[0041] As a preferred embodiment, Figure 1 , 2 As shown in Figures 3 and 4, the bottom wall of the slide groove is provided with a plurality of continuous slots 25, and the slots 25 extend toward both sides of the push plate 22, and the plurality of slots 25 are continuously distributed along the two ends of the push plate 22, and the longitudinal section of the slots 25 is arc-shaped, and a positioning hole is provided at the upper part of the other end of the slide plate 24, and a limiting ball 241 in contact with the bottom wall of the slide groove is installed in the positioning hole through an elastic member e, and the limiting ball 241 can move to any one of the slots 25 during the horizontal movement of the slide plate 24.

[0042] In the above embodiment, when the slide plate 24 slides along the slide groove, the limiting ball 241 in the positioning hole will gradually slide into a slot 25 near the slide plate 24 due to elastic contact with the bottom wall of the slide groove as the slide plate 24 moves, thereby limiting and fixing the slide plate 24. The buffering effect of the elastic member can reduce the vibration and impact of the slide plate 24 caused by external forces during the movement, thereby improving the vibration resistance of the entire device; the limiting ball 241 and the slot 25 and other components can be used to control and position the movement axis (specifically, each operation can make the slide plate 24 slide the distance of one or more slots 25, and as the slide plate 24 continues to move, the limiting ball 241 will slide horizontally from one slot 25 to another slot 25), thereby ensuring the accuracy and stability of the system.

[0043] In this embodiment, the lower ends of the fixed platform 4 and the auxiliary platform 7 can be fixedly connected with foot fixing frames by bolts (the foot fixing frames can refer to the patent of an adjustment device of a foot fixing frame of an inverted machine with the announcement number: CN208927530U). The specific implementation process is as follows: when the staff performs inverted work, the foot fixing frame can firmly fix the legs of the staff, thereby increasing stability and helping the staff to better control their posture to prevent accidents due to loss of balance; through the application of the foot fixing frame, the burden of the staff during inverted work can be reduced, the labor intensity can be reduced, and the center of gravity can be adjusted to the lower part of the body while protecting the legs, making the operation more scientific; when the staff needs to perform inverted work at a height, the use of the foot fixing frame can effectively prevent falls and other physical injuries, and ensure the safety of the staff working at a height; the design of the foot fixing frame enables the staff to complete the tasks that require inverted work more easily, effectively reducing unnecessary leg shaking and movement during work, and avoiding various problems such as inability to complete tasks.

[0044] Example 2

[0045] The downhole tool detection device of this embodiment includes the joint mechanism in Example 1, and also includes various other adapted detection instruments. The various detection instruments are sent to the position to be detected underground through the joint mechanism, thereby realizing the detection of relevant information underground.

[0046] Among them, the detection instrument may include a vibration detection instrument, which includes a closed-end shell, in which a battery, a sliding resistor, an electric light and a camera are arranged, the sliding resistor is electrically connected to the battery, the electric light and the camera are electrically connected to the battery through the sliding resistor respectively, and the camera is connected to a controller.

[0047] In this embodiment, the staff sends the vibration detection instrument into the deep well through the joint mechanism and installs it at the position underground that needs to be detected. When vibration occurs at the place underground that needs to be detected, the vibration will cause the movement of the outer shell, thereby driving the sliding resistor to move together. The movement of the sliding resistor can control the current in the circuit, thereby driving the light to flicker or adjust the brightness. The controller controls the camera to take a picture of the light, and then transmits the picture to the staff's mobile terminal through the controller. The staff judges the vibration amplitude of the position underground that needs to be detected by comparing the brightness of the light in the photo.

[0048] It should be emphasized that: in the actual application scenario, the electric lamp is connected in series with the sliding resistor. When the sliding resistor changes with the vibration position, its resistance value also changes, so that the total resistance of the circuit changes, which will cause the current size to change, and the current transmitted to the electric lamp will change accordingly. Therefore, the movement of the sliding resistor can control the size of the current in the circuit, thereby driving the electric lamp to flicker or adjust the brightness. When the electric lamp is connected in series with the sliding resistor, the larger the resistance, the smaller the circuit current leading to the electric lamp will be. At the same time, according to Ohm's law I=U / R, the voltage will remain unchanged, and the current passing through the electric lamp will also decrease, and the light emitted by the electric lamp will also become dimmer. Therefore, when the vibration amplitude is small, the moving distance of the sliding resistor decreases, its resistance value increases, and the brightness of the electric lamp will decrease. Conversely, when the resistance value of the sliding resistor decreases, the brightness of the electric lamp will increase. Therefore, when the brightness of the electric lamp in the photo is brighter, it means that the vibration amplitude of the detection position is larger; conversely, when the brightness of the electric lamp in the photo is darker, it means that the vibration amplitude of the detection position is smaller, and the device body is used.

[0049] In summary, when there is a positive correlation between the brightness of the light in the photo and the vibration amplitude at the detection position, the vibration conditions of the underground detection position can be indirectly understood by observing the changes in the brightness of the light, thereby realizing remote or unattended vibration monitoring; it has the advantages of easy installation and low cost, and by combining with computers and other equipment, it can realize automated, real-time monitoring and early warning.

[0050] In this embodiment, a mounting frame is fixedly connected to one side of the housing by bolts. Fixing the housing by the mounting frame can improve the stability and reliability of the housing. Since the fixed suspension of the mounting frame can bear part of the weight and inertia of the equipment, the pressure on the housing is reduced, and the accidental shaking of the housing can be effectively avoided. The mounting frame structure designed to be easy to disassemble can make the repair and maintenance of the entire housing more convenient. Moreover, since the mounting frame is relatively independent, the impact on the housing itself is greatly reduced, and the maintenance and cleaning costs are greatly optimized. Fixing the housing on the mounting frame can provide more space and obtain a larger working space.

[0051] In this embodiment, the inner wall of the shell is fixedly connected with a waterproof layer by bolts. The waterproof layer on the inner side of the shell can effectively prevent moisture from entering the shell, avoid moisture, rust and other problems in the battery, sliding resistor, electric light and camera inside the shell, and reduce the damage caused by bacteria and mold to the inside of the shell; the structure of the waterproof layer can improve the sealing of the shell and enhance the pressure bearing capacity of the shell. In some specific environments, such as seriously polluted industrial environments or severe climatic conditions, the application of the waterproof layer can greatly increase the maintenance cycle of the shell and reduce maintenance time and costs.

[0052] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction 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 any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A joint mechanism, characterized in that: The invention comprises a working platform (1), a lifting mechanism (2), a pushing mechanism (3) and a fixed platform (4); the working platform (1) has an inner cavity; the lower end of the working platform (1) is equipped with a boss (5); the pushing mechanism (3) is installed in the boss (5), and the upper end thereof extends into the inner cavity of the working platform (1); the lifting mechanism (2) is installed in the inner cavity of the working platform (1) and cooperates with the upper end of the pushing mechanism (3); the fixed platform (4) is a shell seat adapted to the boss (5), and is arranged outside the boss (5) and connected to the lower end of the pushing mechanism (3); a rebound mechanism (6) is arranged between the pushing mechanism (3) and the boss (5); the lifting mechanism (2) is used to contact the upper end of the pushing mechanism (3), push the pushing mechanism (3) downward, and compress the rebound mechanism (6); and a first operator fixing device is arranged at the lower end of the fixed platform (4).

2. A joint mechanism according to claim 1, characterized in that: The boss (5) is configured to be in the shape of a cone at the bottom, and a mounting hole is provided in the boss (5) and extends vertically to the upper end thereof. The pushing mechanism (3) is installed in the mounting hole, and its lower end passes through the lower end of the boss (5). The fixed platform (4) is in the shape of a cone and is hollow inside. The fixed platform (4) can move upward with the pushing mechanism (3) to be wrapped outside the boss (5), or move downward to be separated from the boss (5).

3. A joint mechanism according to claim 2, characterized in that: The push mechanism (3) comprises a vertical push rod (31), a limit block (32) is provided in the middle of the push rod (31), and the rebound mechanism (6) is connected between the limit block (32) and the bottom of the assembly hole.

4. A joint mechanism according to claim 1, characterized in that: An auxiliary platform (7) extending horizontally in all directions is fixedly mounted on the upper part of the fixed platform (4), and a second operator fixing device and a mechanical arm are provided at the lower end of the auxiliary platform (7).

5. A joint mechanism according to claim 4, characterized in that: The lifting mechanism (2) is connected to a vertical guide rod (8), the lower end of which passes through the bottom of the working platform (1) and is connected and fixed to the auxiliary platform (7).

6. A joint mechanism according to claim 5, characterized in that: A cardboard base (11) is also fixed to the bottom of the working platform (1), the upper end of the boss (5) is embedded in a matching hole on the cardboard base (11), and the lower end of the guide connecting rod (8) passes through the cardboard base (11).

7. A joint mechanism according to any one of claims 1 to 6, characterized in that: The lifting mechanism (2) comprises a push rod (21), a push plate (22), a guide rod (23) and a slide plate (24). The push rod (21) is vertically arranged, and its upper end passes through the top of the inner cavity of the working platform (1). The push rod (21) is horizontally arranged and is connected and fixed to the lower end of the push rod (21). The lower end of the push plate (22) is provided with a slide groove extending to one end thereof. The slide plate (24) is horizontally assembled in the slide groove. The guide rod (23) is inclinedly arranged, and its lower end is connected and fixed to the bottom wall of the inner cavity of the working platform (1). One end of the slide plate (24) is provided with a guide rod obliquely passing through it. The push plate (22) is provided with an opening which is connected with the guide hole at one end, the upper end of the guide rod (23) passes through the guide hole and extends into the opening, and the lower end of the other end of the push plate (22) is provided with an extrusion slope surface, and the push rod (21) is used to drive the push plate (22) to move up and down under the action of external force, so that the slide plate (24) slides horizontally along the guide rod (23) and the slide groove, and when the push rod (21) moves downward, the other end of the slide plate (24) slides horizontally toward the upper end of the push mechanism (3) and squeezes the push mechanism (3) downward to move.

8. A joint mechanism according to claim 7, characterized in that: The bottom wall of the slide groove is provided with a plurality of continuous slots (25), and the slots (25) are extended toward both sides of the push plate (22), and the plurality of slots (25) are continuously distributed along the two ends of the push plate (22), and the longitudinal section of the slots (25) is arc-shaped. A positioning hole is provided at the upper part of the other end of the slide plate (24), and a limiting ball (241) in contact with the bottom wall of the slide groove is installed in the positioning hole through an elastic member. During the horizontal movement of the slide plate (24), the limiting ball (241) can move to any one of the slots (25).

9. A downhole tool detection device, characterized in that: Comprising a joint mechanism as described in any one of claims 1-8.

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