Deep geothermal drilling detection device and detection method
By designing a radially expandable protective flap and protective plate structure and linkage mechanism, the probe head was fully sealed during the deep geothermal drilling process, solving the problems of equipment damage and data distortion, and improving the reliability and data accuracy of the probe equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA UNIV OF MINING & TECH
- Filing Date
- 2026-04-14
- Publication Date
- 2026-05-29
AI Technical Summary
Existing geothermal drilling and detection equipment is prone to collision and damage with the well wall during the lowering and lifting process, and the downhole environment causes pollution and corrosion to the probe head, lacking a fully enclosed protection mechanism.
A deep geothermal drilling exploration device was designed, which adopts a protective structure composed of protective petals and protective plates that can be radially retracted and expanded. The probe head is fully sealed and protected during the lowering process through a linkage mechanism, and automatically unfolds to conduct exploration after reaching the target depth.
This effectively avoids collisions between the equipment and the well wall, as well as damage to the probe from the downhole environment, ensuring data accuracy and equipment lifespan, and improving the intelligence and reliability of the operation.
Smart Images
Figure CN122106559A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of geothermal resource exploration and development and drilling engineering technology, specifically a deep geothermal drilling detection equipment and method. Background Technology
[0002] As a clean and renewable energy source, geothermal resources are becoming increasingly important for exploration and development. In the process of deep geothermal drilling, it is usually necessary to lower the detection equipment to a certain depth in order to collect key data such as temperature, pressure and rock structure. The underground environment is extremely complex and harsh, with high temperature, high pressure, possible hard rock cuttings or the risk of collision with the well wall, which poses a serious threat to the precision and expensive detection sensors.
[0003] Currently, common detection equipment typically exposes the probe head directly or uses only a simple fixed protective cover. This method makes the probe head highly susceptible to scratches and collisions with the well wall during lowering and raising, leading to distorted detection data or even equipment failure. Furthermore, during lowering, raising, and downhole standby, solid impurities such as rock cuttings and silt from the well wall can easily adhere to, clog, or wear down the sensitive components of the probe head. Simultaneously, high-pressure water vapor, corrosive fluids, and rainwater and moisture from the surface can easily cause electrical short circuits and oxidation corrosion of the detection components, leading to performance degradation and increasing exploration costs and operational risks. Although some equipment has attempted to add protective structures, these often suffer from complex structures, cumbersome operations, or incomplete protection. In particular, there is a lack of an intelligent protection mechanism that provides full-scale enclosed protection during the lowering process and automatically and systematically deploys only after reaching the target working depth.
[0004] Therefore, there is an urgent need for a new type of equipment that can provide effective protection during the deployment of the detector and can automatically deploy and conduct detection after reaching the designated working position, in order to solve the above-mentioned technical problems. To this end, we provide a deep geothermal drilling detection equipment and detection method to solve the problems mentioned above. Summary of the Invention
[0005] The purpose of this invention is to provide a deep geothermal drilling detection device and method that can provide effective protection during the lowering and raising of the detector, and automatically extend the detection device from the protective structure to conduct detection only after reaching the designated working position, thereby solving the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: A deep geothermal drilling and exploration device includes a main frame, on which an upper fixed seat and a movable seat are arranged sequentially from top to bottom. The upper fixed seat is fixed to the main frame, and the movable seat is driven to move up and down by a first driving device arranged on the main frame. The movable base is fixedly installed with a protective cylinder with an open bottom. The inner cavity at the bottom of the protective cylinder is provided with a probe head for detecting deep geothermal wells. The bottom opening of the protective cylinder is provided with multiple protective petals that are circumferentially distributed at equal angles and can move radially synchronously. Each protective petal has a protective plate fixed at its bottom. The multiple protective petals and the protective plate together form a ring structure, which covers the outside of the probe head and provides protection for the probe head. The protective cylinder, protective flaps, and probe are connected by a linkage mechanism. When the protective cylinder descends to a set height, it will first drive multiple protective flaps to expand radially in sync. As the protective cylinder continues to descend, the linkage mechanism will further drive the probe to move downward, so that the probe extends out from the inside of the unfolded protective flaps.
[0007] A deep geothermal drilling and exploration device as described above: the first driving device includes a cylinder fixed on the main frame of the device, a piston rod is provided at the output end of the cylinder, the piston rod passes through the upper fixed seat and is fixedly connected to the movable seat, and a limiting component for the movable seat to rise and fall is provided between the movable seat and the upper fixed seat.
[0008] A deep geothermal drilling and exploration device as described above: the limiting component includes multiple guide rods fixed on a movable seat, the guide rods passing through the upper fixed seat.
[0009] As described above, a deep geothermal drilling and detection device has sealing strips fixedly adhered to the edges of multiple protective petals and protective sheets to seal the gaps between adjacent protective petals and protective sheets.
[0010] A deep geothermal drilling and exploration device as described above: the linkage mechanism includes a fixed sleeve fixed inside the protective cylinder and a first transmission sleeve rotatably installed inside the protective cylinder. A rod and a piston are slidably fitted from top to bottom inside the fixed sleeve. A connecting spring is fixedly connected between the rod and the piston. One end of the rod is fixed on the upper fixed seat. The piston has a lifting column fixed at its bottom, which passes through the fixed sleeve and extends into the first transmission sleeve. A guide seat is fixed inside the protective sleeve. An external thread head is fixed at the end of the first transmission sleeve. A threaded slider that is threadedly engaged with the external thread head is fixed on the protective flap. The threaded slider is slidably engaged inside the guide seat by the first limiting component. The inner through hole of the external threaded head is provided with a second transmission sleeve that is rotatably mounted on the first transmission sleeve and sleeved on the lifting column. A sleeve is inserted into the second transmission sleeve and the top end of the sleeve is threadedly engaged with the bottom end of the second transmission sleeve. A prism groove is opened in the lifting column. A prism that is slidably engaged in the prism groove is fixed in the sleeve. The probe head is fixedly mounted on the bottom end of the sleeve. The sleeve passes through the external threaded head. The lifting column is installed through the first transmission sleeve, and the lifting column is engaged with the first transmission sleeve and the second transmission sleeve through a groove structure.
[0011] A deep geothermal drilling and detection device as described above: the first limiting component includes a guide groove formed on the inner wall of the guide seat and a guide key fixed on the outer wall of the threaded slider, wherein the guide key is slidably engaged inside the guide groove.
[0012] A deep geothermal drilling and exploration device as described above: the groove structure includes a composite groove formed on the lifting column, a first ball embedded and locked in the inner wall of the first transmission sleeve, and a second ball embedded and locked in the inner wall of the second transmission sleeve. The first ball and the second ball are respectively movably locked in the track where the composite groove is located. The composite groove includes a first spiral track, a vertical track and a second spiral track connected sequentially from top to bottom.
[0013] As described above, in a deep geothermal drilling and exploration device: the second transmission sleeve is rotatably mounted on the inner wall of the first transmission sleeve via a bearing.
[0014] As described above, a deep geothermal drilling and exploration device has an external thread on the outer periphery of the top end of the casing and an internal thread on the inner wall of the bottom end of the second transmission sleeve, wherein the external thread and the internal thread are threadedly engaged.
[0015] A detection method for the deep geothermal drilling detection equipment includes the following steps: S1. The movable seat is driven to descend by the first driving device, which in turn lowers the protective cylinder fixed thereto, the probe inside, and the protective flap in the retracted state to the depth of the well. S2. When the protective cylinder descends to the set height, the lifting column moves up relative to the fixed sleeve to the set first height through the linkage mechanism. When the lifting column continues to move up relative to the fixed sleeve, the first transmission sleeve is driven to rotate through the groove structure while the second transmission sleeve does not rotate. Then, through the threaded engagement between the external thread head and the threaded slider, all protective petals are driven to expand radially synchronously and no longer surround the probe head. S3. After the protective flap expands, the protective sleeve continues to move downwards. At the same time, the lifting column moves upwards relative to the fixed sleeve to the set second height and continues to move upwards. At this time, the grooving structure drives the first transmission sleeve to stop rotating and drives the second transmission sleeve to rotate. The second transmission sleeve and the casing thread engage, causing the casing to move downwards relative to the second transmission sleeve, thereby pushing the probe fixed at its bottom to extend downwards until it is fully exposed in the center of the expanded protective flap, and the geothermal drilling exploration operation begins. S4. After the detection operation is completed, the first drive device drives the movable seat to rise, and the linkage mechanism operates in the opposite order. First, the lifting column moves down relative to the fixed sleeve, and the sleeve and probe head are retracted into the protective petals through the grooving structure. Then, the lifting column continues to move down relative to the fixed sleeve, and the first transmission sleeve is reversed through the grooving structure, which drives all the protective petals to retract radially, covering and protecting the probe head again. Finally, the entire equipment is lifted to the ground.
[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention achieves full-process sealed protection of the probe head during equipment lowering, lifting and downhole non-working periods by setting up a protective structure composed of radially retractable and expandable protective petals and protective plates, as well as a precise linkage mechanism. This not only effectively avoids collisions and scraping between the equipment and the well wall during deep geothermal drilling exploration, but also isolates the precision probe head from the adhesion, blockage, wear and corrosion of harmful substances such as rock cuttings, mud, high-pressure water vapor and corrosive fluids, greatly extending the service life of the equipment. Since the probe head is always in a clean and safe sealed environment before reaching the target depth, it effectively avoids the problem of data distortion caused by the contamination or damage of the sensors on the probe head during the journey, ensuring the accuracy and authenticity of the collected key data such as temperature and pressure, and providing a high-quality data foundation for geothermal resource assessment. Furthermore, this invention integrates complex multi-stage actions into a single linkage mechanism by setting a unique groove structure combined with threaded transmission. With only the lifting drive of a single protective cylinder, the two actions of "radial expansion of the protective petal and protective plate" and "axial extension of the probe head" can be completed automatically and reliably in sequence. This process does not require an additional drive source for control, the action sequence is accurate, avoids misoperation, and ensures that the probe head is only exposed to work in a safe working position, thereby improving the intelligence level and reliability of the operation. Attached Figure Description
[0017] Figure 1 This is a first-person view schematic diagram of the overall structure of a deep geothermal drilling and exploration device.
[0018] Figure 2 This is a schematic diagram of the overall structure of a deep geothermal drilling and exploration device from a second perspective.
[0019] Figure 3 for Figure 2 A schematic diagram of the decomposed part of the structure.
[0020] Figure 4 for Figure 3 A schematic diagram of the structure after partial cross-section of the fixing sleeve.
[0021] Figure 5 for Figure 4 A schematic diagram of the decomposed part of the structure.
[0022] Figure 6 for Figure 5 A magnified structural diagram at point A in the diagram.
[0023] Figure 7 This is a schematic diagram of a partial cross-sectional view of a deep geothermal drilling and exploration device.
[0024] Figure 8 for Figure 5 A schematic diagram of the decomposed part of the structure.
[0025] Figure 9 for Figure 8 A schematic diagram of the decomposed structure.
[0026] Figure 10 for Figure 9 A structural diagram from another perspective.
[0027] Figure 11 This is a schematic diagram of a partial cross-sectional view of a deep geothermal drilling and exploration device.
[0028] In the diagram: 1. Main frame of the equipment; 2. Cylinder; 3. Piston rod; 4. Movable seat; 5. Upper fixed seat; 6. Guide rod; 7. Fixed sleeve; 8. Protective flap; 9. Probe head; 10. Insert rod; 11. Piston; 12. Connecting spring; 13. Lifting column; 14. First transmission sleeve; 15. External thread head; 16. Threaded slider; 17. Guide seat; 18. Guide key; 19. Guide groove; 20. Composite groove; 21. First ball bearing; 22. Second transmission sleeve; 23. Prismatic groove; 24. Prism; 25. Second ball bearing; 26. Protective plate; 27. Protective cylinder; 29. Sleeve; 31. External thread; 32. Internal thread; 33. Bearing. Detailed Implementation
[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0030] Please see Figure 1-11 As an embodiment of the present invention, a deep geothermal drilling and exploration device includes a main frame 1. An upper fixed seat 5 and a movable seat 4 are arranged sequentially from top to bottom on the main frame 1. The upper fixed seat 5 is fixed on the main frame 1, and the movable seat 4 is driven to move up and down by a first driving device arranged on the main frame 1. A protective cylinder 27 with a bottom opening is fixedly installed on the movable base 4. A probe head 9 for detecting deep geothermal wells is set in the inner cavity at the bottom end of the protective cylinder 27. Multiple protective petals 8 are arranged in a circular pattern at equal angles and can move radially synchronously. A protective plate 26 is fixed at the bottom of each protective petal 8. The multiple protective petals 8 and the protective plate 26 together form a ring structure, which covers the probe head 9 and protects the probe head 9. The protective cylinder 27, protective petals 8, and probe head 9 are connected by a linkage mechanism. When the protective cylinder 27 descends to the set height, it will first drive multiple protective petals 8 to expand radially in sync. When the protective cylinder 27 continues to descend, the linkage mechanism will further drive the probe head 9 to move downward, so that the probe head 9 extends out from the inside of the unfolded protective petals 8.
[0031] In this embodiment, when the equipment is working, the first drive device drives the movable seat 4 to move downward along the main frame 1 of the equipment, which in turn drives the protective cylinder 27 fixed thereon, the protective petals 8 in a retracted state, and the probe head 9 to a predetermined depth in the well. When the protective cylinder 27 descends to the set height, the linkage mechanism is triggered: the continuous descent of the protective cylinder 27 first drives multiple protective petals 8 and protective plates 26 to expand radially in sync, so that the annular protective structure that originally surrounded the probe head 9 opens and forms a detection channel. Subsequently, as the protective cylinder 27 continues to descend, the linkage mechanism further pushes the probe head 9 downward, so that it extends out from the inside of the unfolded protective petals 8 and enters the drilling environment to perform the detection task. After the operation is completed, the equipment rises, and the linkage mechanism operates in the reverse order. First, it drives the probe head 9 to retract into the protective cylinder 27, and then drives the protective petals 8 and protective plates 26 to close radially, re-covering the probe head 9, and then lifting the equipment to the surface.
[0032] As a further embodiment of the present invention, the first driving device includes a cylinder 2 fixed on the main frame 1 of the equipment. A piston rod 3 is provided at the output end of the cylinder 2. The piston rod 3 passes through the upper fixed seat 5 and is fixedly connected to the movable seat 4. A limiting component for the movable seat 4 to rise and fall is provided between the movable seat 4 and the upper fixed seat 5.
[0033] In this embodiment, the starting cylinder 2 drives the piston rod 3 to extend and retract, thereby causing the movable seat 4 to rise and fall linearly in the vertical direction. The set limit component can ensure that the movable seat 4 always moves smoothly along the predetermined trajectory, effectively preventing deviation or jamming during operation and ensuring the reliability of the equipment.
[0034] As a further embodiment of the present invention, the limiting component includes a plurality of guide rods 6 fixed on the movable seat 4, and the guide rods 6 are disposed through the upper fixed seat 5.
[0035] In this embodiment, the four guide rods 6 and the four guide holes on the upper fixed seat 5 are fitted with high precision, which not only provides accurate guidance for the lifting and lowering movement of the movable seat 4, but also effectively prevents it from rotating or deviating during the lifting and lowering process, ensuring the stability and accuracy of the equipment operation.
[0036] As a further aspect of the present invention, sealing strips are fixedly adhered to the edges of multiple protective petals 8 and protective plates 26 to seal the gaps between adjacent protective petals 8 and protective plates 26.
[0037] In this embodiment, the high-quality sealing strip can effectively seal all gaps between adjacent components when the protective flap 8 and the protective plate 26 are in a fully closed state. This reliably prevents impurities such as mud, rock cuttings, high-pressure water vapor, and other corrosive fluids from entering the interior of the protective structure, ensuring that the precision probe 9 remains clean and dry during underground transportation and waiting, and greatly extending the service life of the equipment.
[0038] As a further embodiment of the present invention, the linkage mechanism includes a fixed sleeve 7 fixed inside the protective cylinder 27 and a first transmission sleeve 14 rotatably installed inside the protective cylinder 27. The fixed sleeve 7 has a sliding fit between a rod 10 and a piston 11 from top to bottom. A connecting spring 12 is fixedly connected between the rod 10 and the piston 11. One end of the rod 10 is fixed on the upper fixed seat 5. A lifting column 13 is fixed at the bottom of the piston 11, which is set through the fixed sleeve 7 and extends into the first transmission sleeve 14. A guide seat 17 is fixed inside the protective sleeve 27. An external thread head 15 is fixed at the end of the first transmission sleeve 14. A threaded slider 16 that is threaded with the external thread head 15 is fixed on the protective flap 8. The threaded slider 16 is slidably engaged inside the guide seat 17 by the first limiting component, so that it can only move radially and cannot rotate. A second transmission sleeve 22 is provided at the inner through hole of the external thread head 15, which is rotatably mounted on the first transmission sleeve 14 and sleeved on the lifting column 13. A sleeve 29 is inserted into the second transmission sleeve 22 and the top end of the sleeve 29 is threadedly engaged with the bottom end of the second transmission sleeve 22. A prism groove 23 is opened in the lifting column 13. A prism 24 is fixed in the sleeve 29 and slidably engaged in the prism groove 23. The probe head 9 is fixedly installed at the bottom end of the sleeve 29. The sleeve 29 passes through the external thread head 15. The lifting column 13 is installed through the first transmission sleeve 14, and the lifting column 13 is engaged with the first transmission sleeve 14 and the second transmission sleeve 22 through a grooving structure. When the lifting column 13 moves up to the set first height relative to the fixed sleeve 7 and continues to move up, the grooving structure first drives the first transmission sleeve 14 to rotate, thereby driving the external thread head 15 to rotate. Then, through the thread engagement, all threaded sliders 16 and protective petals 8 are driven to expand radially synchronously. When the lifting column 13 moves up to the set second height relative to the fixed sleeve 7 and continues to move up, the first transmission sleeve 14 stops rotating, and the second transmission sleeve 22 starts to rotate. Then, through the thread engagement between the second transmission sleeve 22 and the sleeve 29, the sleeve 29 is driven to move down relative to the second transmission sleeve 22, thereby driving the probe head 9 on the second transmission sleeve 22 to move down along the inner through hole of the external thread head 15, and finally protruding from the center of the expanded protective petals 8.
[0039] In this embodiment, the external thread head 15 is a conical shape with a central opening. The shapes of the threaded slider 16 and the guide seat 17 are adapted to the external thread head 15. The two sides of the threaded slider 16 are respectively attached to the outer wall of the external thread head 15 and the inner wall of the guide seat 17. The initial state of the connecting spring 12 is a compressed state. When the protective cylinder 27 drives the fixed sleeve 7 downward, the insertion rod 10 is stationary because it is fixed on the upper fixed seat 5. The downward movement of the fixed sleeve 7 causes the connecting spring 12 to gradually change from a compressed state to a free state. During this process, the elastic force of the connecting spring 12 will squeeze the piston 11, so that the piston 11 is always located at the bottom of the fixed sleeve 7 and does not have relative displacement with the fixed sleeve 7. When the protective cylinder 27 drives the fixed sleeve 7 downward to a certain depth in the well and continues to move downward, the connecting spring 12 changes from a free state to a stretched state. The tension is then transmitted to the piston 11, which will force the piston 11 to move relative to the fixed sleeve 7. The fixed sleeve 7 moves upward, thereby pulling the lifting column 13 upward relative to the fixed sleeve 7. When the lifting column 13 moves upward relative to the fixed sleeve 7 to the set first height and continues to move upward, the rolling groove structure on it will first drive the first transmission sleeve 14 to rotate, thereby driving the external thread head 15 to rotate. Then, through the threaded engagement, all threaded sliders 16 and protective petals 8 will be driven to expand radially synchronously. When the lifting column 13 continues to move upward relative to the fixed sleeve 7 to the set second height and continues to move upward, the first transmission sleeve 14 stops rotating, and the second transmission sleeve 22 starts to rotate. Then, through the threaded engagement between the second transmission sleeve 22 and the sleeve 29, the sleeve 29 is driven to move downward relative to the second transmission sleeve 22, thereby driving the probe head 9 on the second transmission sleeve 22 to move downward along the inner through hole of the external thread head 15, and finally protruding from the center of the expanded protective petals 8, thus successfully realizing the detection function.
[0040] As a further embodiment of the present invention, the first limiting component includes a guide groove 19 formed on the inner wall of the guide seat 17 and a guide key 18 fixed on the outer wall of the threaded slider 16, wherein the guide key 18 is slidably engaged inside the guide groove 19.
[0041] In this embodiment, the guide key 18 and the guide groove 19 form a sliding pair. When the external thread head 15 rotates, the threaded slider 16 cannot rotate because the guide key 18 is restricted in the guide groove 19. The threaded engagement of the external thread head 15 and the threaded slider 16 is then used to force the threaded slider 16 to expand along the precise radial oblique line of the guide groove 19, thereby ensuring the synchronous and smooth expansion and contraction of all protective petals 8.
[0042] As a further embodiment of the present invention, the groove structure includes a composite groove 20 formed on the lifting column 13, a first ball 21 embedded and locked in the inner wall of the first transmission sleeve 14, and a second ball 25 embedded and locked in the inner wall of the second transmission sleeve 22. The first ball 21 and the second ball 25 are respectively movably locked in the track where the composite groove 20 is located and can roll along the track where the composite groove 20 is located. The composite groove 20 includes a first spiral track, a vertical track and a second spiral track connected from top to bottom.
[0043] In this embodiment, when the lifting column 13 moves upward relative to the first transmission sleeve 14 to a first height and continues to move upward, the first ball 21 enters the first section of the spiral track of the composite groove 20. At this time, the second ball 25 is in the vertical track of the composite groove 20. During this stage, the first section of the spiral track forces the first ball 21 to drive the first transmission sleeve 14 to rotate, thereby expanding the protective flap 8, while the second transmission sleeve 22 does not rotate. When the lifting column 13 moves upward relative to the first transmission sleeve 14 to a second height and continues to move upward, the first ball 21 enters the vertical track section, and the second ball 25 enters the second section of the spiral track. During this stage, the vertical track section causes the first ball 21 to stop rotating, and the first transmission sleeve 14 stops rotating. At the same time, the second ball 25 enters the second spiral track section and begins to drive the second transmission sleeve 22 to rotate, thereby causing the probe head 9 to extend.
[0044] As a further embodiment of the present invention, the second transmission sleeve 22 is rotatably mounted on the inner wall of the first transmission sleeve 14 via the bearing 33, so that it can only rotate and cannot move axially along the first transmission sleeve 14.
[0045] In this embodiment, the bearing 33 provides stable rotational support for the second transmission sleeve 22, fixing its axial position and ensuring that the rotation of the second transmission sleeve 22 can be accurately converted into the pure linear motion of the sleeve 29 through the threaded pair, without axial movement.
[0046] As a further embodiment of the present invention, the outer periphery of the top end of the sleeve 29 is provided with an external thread 31, and the inner wall of the bottom end of the second transmission sleeve 22 is provided with an internal thread 32, and the external thread 31 and the internal thread 32 are threadedly engaged.
[0047] In this embodiment, the threaded pair is the key mechanism for converting the rotational motion of the second transmission sleeve 22 into the linear motion of the sleeve 29. With the guiding effect between the prism groove 23 in the lifting column 13 and the prism 24 fixed in the sleeve 29, the precise conversion of the motion mode is achieved.
[0048] The working principle of this invention is as follows: In the initial stage of equipment descent, the starting cylinder 2 drives the piston rod 3 to extend and retract, causing the movable seat 4 to rise and fall vertically, thus lowering the protective cylinder 27 at a constant speed. The linkage mechanism is not triggered, and the protective flap 8 is in a closed state, providing full protection for the probe head 9 during descent. When the equipment reaches the set position in the well, the protective cylinder 27 and the fixed sleeve 7 decelerate due to the elastic force of the connecting spring 12. The connecting spring 12 then pulls the piston 11 upward relative to the fixed sleeve 7, causing the lifting column 13 to move upward. The lifting column 13 rises to the first set height, the first ball 21 is located in the first section of the spiral track of the composite groove 20, driving the first transmission sleeve 14 and the external thread head 15 to rotate. The rotation of the external thread head 15 is converted into the synchronous radial expansion of all the protective petals 8 by means of the radial constraint of the guide key 18 in the guide groove 19 through its threaded engagement with each threaded slider 16, and by means of the radial constraint of the guide key 18 in the guide groove 19, thus opening the detection channel. After the protective flap 8 is fully deployed, the lifting column 13 continues to rise to the second set height. At this time, the first ball bearing 21 enters the vertical track section of the composite groove 20, the first transmission sleeve 14 stops rotating, and the protective flap 8 remains in an expanded state. At the same time, the second ball bearing 25 enters the second spiral track from the vertical track of the composite groove 20 and begins to drive the second transmission sleeve 22 to rotate. The rotation of the second transmission sleeve 22 is transmitted to the sleeve 29 through its threaded engagement with the top of the sleeve 29. Since the prism 24 on the sleeve 29 is restricted within the axial prism groove 23 of the lifting column 13 and cannot rotate, the rotation of the second transmission sleeve 22 is forcibly converted into the downward linear motion of the sleeve 29 and the probe 9 fixed at its bottom end, so that it can smoothly extend to the working position for detection.
[0049] The above embodiments are exemplary and not restrictive. Therefore, any technical solutions that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention are included within the scope of the present invention.
Claims
1. A deep geothermal drilling and exploration device, comprising a main frame (1), characterized in that, The main frame (1) of the equipment is provided with an upper fixed seat (5) and a movable seat (4) from top to bottom. The upper fixed seat (5) is fixed on the main frame (1) of the equipment, and the movable seat (4) is driven by a first driving device provided on the main frame (1) of the equipment to achieve lifting and lowering movement. The movable seat (4) is fixedly installed with a protective cylinder (27) with an open bottom. The inner cavity at the bottom end of the protective cylinder (27) is provided with a probe head (9) for detecting deep geothermal wells. The bottom opening of the protective cylinder (27) is provided with multiple protective petals (8) that are circumferentially distributed at equal angles and can move synchronously radially. Each protective petal (8) has a protective plate (26) fixed at its bottom. The multiple protective petals (8) and the protective plate (26) together form a ring structure, which covers the probe head (9) and protects the probe head (9). The protective cylinder (27) cooperates with the protective petals (8) and the probe (9) through a linkage mechanism. When the protective cylinder (27) descends to a set height, it will first drive multiple protective petals (8) to expand radially in sync. When the protective cylinder (27) continues to descend, the linkage mechanism will further drive the probe (9) to move downward, so that the probe (9) extends out from the inside of the unfolded protective petals (8).
2. The deep geothermal drilling and detection equipment according to claim 1, characterized in that, The first driving device includes a cylinder (2) fixed on the main frame (1) of the equipment. A piston rod (3) is provided at the output end of the cylinder (2). The piston rod (3) passes through the upper fixed seat (5) and is fixedly connected to the movable seat (4). A limiting component for the movable seat (4) when it rises and falls is provided between the movable seat (4) and the upper fixed seat (5).
3. The deep geothermal drilling and detection equipment according to claim 2, characterized in that, The limiting component includes multiple guide rods (6) fixed on the movable seat (4), and the guide rods (6) pass through the upper fixed seat (5).
4. The deep geothermal drilling and detection equipment according to claim 1, characterized in that, Sealing strips are fixedly adhered to the edges of the multiple protective petals (8) and protective sheets (26) to seal the gaps between adjacent protective petals (8) and protective sheets (26).
5. The deep geothermal drilling and detection equipment according to claim 1, characterized in that, The linkage mechanism includes a fixed sleeve (7) fixed inside the protective cylinder (27) and a first transmission sleeve (14) rotatably installed inside the protective cylinder (27). The fixed sleeve (7) has a sliding fit between a rod (10) and a piston (11) from top to bottom. A connecting spring (12) is fixedly connected between the rod (10) and the piston (11). One end of the rod (10) is fixed on the upper fixed seat (5). The piston (11) has a lifting column (13) fixed at the bottom, which is set through the fixed sleeve (7) and extends into the first transmission sleeve (14). The protective sleeve (27) has a guide seat (17) fixed inside. The end of the first transmission sleeve (14) has an external thread head (15) fixed. The protective flap (8) has a threaded slider (16) that is threadedly engaged with the external thread head (15). The threaded slider (16) is slidably engaged inside the guide seat (17) by the first limiting component. The inner through hole of the external threaded head (15) is provided with a second transmission sleeve (22) which is rotatably mounted on the first transmission sleeve (14) and sleeved on the lifting column (13). A sleeve (29) is inserted into the second transmission sleeve (22) and the top end of the sleeve (29) is threadedly engaged with the bottom end of the second transmission sleeve (22). A prism groove (23) is opened in the lifting column (13). A prism (24) is fixedly slidably engaged in the prism groove (23) inside the sleeve (29). The probe (9) is fixedly installed at the bottom end of the sleeve (29). The sleeve (29) is set through the external threaded head (15). The lifting column (13) is installed through the first transmission sleeve (14), and the lifting column (13) is engaged with the first transmission sleeve (14) and the second transmission sleeve (22) through a groove structure.
6. The deep geothermal drilling and detection equipment according to claim 5, characterized in that, The first limiting component includes a guide groove (19) formed on the inner wall of the guide seat (17) and a guide key (18) fixed on the outer wall of the threaded slider (16), wherein the guide key (18) is slidably engaged inside the guide groove (19).
7. The deep geothermal drilling and detection equipment according to claim 5, characterized in that, The groove structure includes a composite groove (20) opened on the lifting column (13), a first ball (21) embedded and locked in the inner wall of the first transmission sleeve (14), and a second ball (25) embedded and locked in the inner wall of the second transmission sleeve (22). The first ball (21) and the second ball (25) are respectively movably locked in the track where the composite groove (20) is located. The composite groove (20) includes a first spiral track, a vertical track and a second spiral track connected from top to bottom.
8. The deep geothermal drilling and detection equipment according to claim 5, characterized in that, The second transmission sleeve (22) is rotatably mounted on the inner wall of the first transmission sleeve (14) via a bearing (33).
9. A deep geothermal drilling and detection device according to claim 5, characterized in that, The top outer periphery of the sleeve (29) is provided with an external thread (31), and the inner wall of the bottom end of the second transmission sleeve (22) is provided with an internal thread (32). The external thread (31) and the internal thread (32) are threadedly engaged.
10. A detection method based on the deep geothermal drilling detection equipment according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Drive the movable seat (4) to descend through the first drive device, and lower the protective cylinder (27) fixed thereto, the probe (9) inside it, and the protective petal (8) in the retracted state together into the drilling depth; S2. When the protective cylinder (27) descends to the set height, the lifting column (13) moves up relative to the fixed sleeve (7) to the set first height through the linkage mechanism. When the lifting column (13) continues to move up relative to the fixed sleeve (7), the first transmission sleeve (14) is driven to rotate through the grooving structure while the second transmission sleeve (22) does not rotate. Then, through the threaded engagement of the external thread head (15) and the threaded slider (16), all protective petals (8) are driven to expand radially synchronously and no longer surround the probe head (9). S3. After the protective petal (8) has expanded, the protective cylinder (27) continues to move downward. At the same time, the lifting column (13) moves upward relative to the fixed sleeve (7) to the set second height and continues to move upward. At this time, the grooving structure drives the first transmission sleeve (14) to stop rotating and drives the second transmission sleeve (22) to rotate. By using the threaded engagement between the second transmission sleeve (22) and the casing (29), the casing (29) moves downward relative to the second transmission sleeve (22), thereby pushing the probe head (9) fixed at its bottom to extend downward until it is completely exposed in the center of the expanded protective petal (8) and the geothermal drilling exploration operation begins. S4. After the detection operation is completed, the first drive device drives the movable seat (4) to rise, and the linkage mechanism operates in the opposite order. First, the lifting column (13) moves down relative to the fixed sleeve (7), and through the grooving structure, it drives the sleeve (29) and the probe head (9) to retract into the protective petal (8). Then, the lifting column (13) continues to move down relative to the fixed sleeve (7), and through the grooving structure, it drives the first transmission sleeve (14) to reverse, driving all the protective petals (8) to radially retract, and re-covering and protecting the probe head (9). Finally, the entire equipment is lifted to the ground.