Geothermal detection device for geological exploration

Abstract

The invention relates to the technical field of terrestrial heat detection, and discloses a geological exploration terrestrial heat detection device which comprises a machine body, a partition plate is fixedly connected in the machine body, the interior of the machine body is divided into an upper cavity and a lower cavity by the partition plate, and a walking mechanism is arranged on the outer wall of the machine body and used for driving the machine body to move in an exploration well; the drilling mechanism is mounted at the end part of the machine body and is used for removing blockages in the exploration well; the adjusting mechanism is mounted in the machine body, and the adjusting mechanism is used for adjusting the walking mechanism, so that the machine body can move in the exploration wells with different inner diameters; the walking mechanism comprises three pairs of supports which are arranged on the outer wall of the machine body at equal intervals. The adjusting mechanism and the moving rod are arranged in a matched mode, synchronous radial stretching and retracting of the three pairs of walking wheels are achieved, the device adapts to a multi-stage variable-diameter well section in real time, continuous detection of the whole well section can be completed at a time without replacing tools, the construction period is remarkably shortened, and the operation cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of geothermal exploration technology, and in particular to a geothermal exploration device for geological exploration. Background Technology

[0002] Geothermal energy, as a clean, stable, and renewable new energy source, occupies an increasingly important position in the global energy structure transformation. To accurately assess geothermal resource reserves, temperature gradients, and reservoir distribution, high-precision, large-scale in-situ downhole exploration of deep thermal anomaly zones is essential during the early geological exploration phase. In recent years, as the development of medium-deep geothermal resources has extended to depths exceeding 3000m, the well formation conditions for exploration wells have become increasingly complex, placing higher demands on the adaptability, mobility, and reliability of downhole exploration equipment.

[0003] Currently, downhole geothermal exploration equipment is mainly divided into two categories: cable-controlled type – relying on ground winches and cables for lifting and lowering, with a simple structure and reliable real-time data transmission, but it is prone to jamming when encountering sudden changes in well diameter, collapse, or scaling sections, leading to test failure or even cable breakage; autonomous crawling type – moving autonomously on the well wall through wheeled or tracked mechanisms, allowing for multiple round trips for measurement, however, its wheel track or track center distance is fixed after leaving the factory, and it is only suitable for a single designed well diameter; when the diameter of the exploration well fluctuates due to changes in casing specifications in different sections or well wall erosion and expansion, the crawler commonly slips, jams, or even falls, making it difficult to complete continuous exploration of the entire well section.

[0004] In summary, existing detection equipment cannot achieve stable movement and full-section parameter acquisition in the same multi-stage variable-diameter exploration well; once the well diameter changes beyond the adjustment range of its mechanism, it is necessary to pull the drill string to replace tools of different specifications or to work over the well, which not only prolongs the construction period but also significantly increases costs. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a geological exploration geothermal detection device to solve the problems mentioned in the background art.

[0006] This invention provides a geological exploration geothermal detection device, comprising a body, with a partition fixedly connected inside the body, dividing the body into an upper chamber and a lower chamber by the partition, and a traveling mechanism provided on the outer wall of the body for moving the body within an exploration well; further comprising: A drilling mechanism, mounted at the end of the machine body, is used to remove blockages inside an exploration well; An adjustment mechanism is installed inside the machine body and is used to adjust the traveling mechanism so that the machine body can move inside exploration wells of different inner diameters.

[0007] Preferably, the walking mechanism includes three pairs of brackets, which are equidistantly arranged on the outer wall of the machine body. Support shafts are fixedly connected to the upper and lower sides of the brackets at the end away from the machine body. Electric rollers are provided on the side wall of the support shaft located above the brackets, and driven wheels are rotatably connected to the side wall of the support shaft located below the brackets. Moving rods are symmetrically fixedly connected to the upper and lower sides of the brackets at the end closest to the machine body. The ends of the moving rods penetrate the lower cavity and are slidably connected to the wall of the machine body. The walking mechanism also includes an anti-slip component.

[0008] Preferably, the anti-slip component includes a pair of drive wheels, which are fixedly connected to the outer walls of the electric roller and the driven wheel, respectively, and the two drive wheels are connected by a track drive.

[0009] Preferably, the adjustment mechanism includes a pair of rotating disks, which are rotatably connected to the upper and lower sides of the lower chamber, respectively. A sleeve rod is fixedly connected between the pair of rotating disks. The sleeve rod is located at the axis of the rotating disk. Arc-shaped grooves are equally spaced on the opposite end face of each rotating disk. Limiting blocks are slidably connected inside the arc-shaped grooves. The end of the limiting block is fixedly connected to the side wall of the moving rod. The adjustment mechanism also includes a second drive assembly.

[0010] Preferably, the second drive assembly includes a worm gear, which is fixedly connected to the outer wall of the sleeve rod. A worm is rotatably connected to the inner wall of the lower cavity through a bearing seat. The worm meshes with the worm gear. A second servo motor is fixedly connected to the front end of the bearing seat. The output shaft of the second servo motor is fixedly connected to the front end of the worm.

[0011] Preferably, the drilling mechanism includes a connecting shaft, which is rotatably connected inside the partition. The lower side wall of the connecting shaft passes through and is rotatably connected to the sleeve rod. Both the upper and lower ends of the connecting shaft extend to the outside of the machine body and are rotatably connected to the machine body wall. Both the upper and lower ends of the connecting shaft are fixedly connected to a drill bit. The outer wall of the drill bit is provided with spiral patterns. The drilling mechanism also includes a first drive assembly.

[0012] Preferably, the first drive assembly includes a first servo motor, which is fixedly connected to the lower end of the partition. A first gear is fixedly connected to the output shaft end of the first servo motor, and a second gear meshes with the side wall of the first gear. The inner wall of the second gear is fixedly connected to the outer wall of the connecting shaft.

[0013] Preferably, the drill bit has notches at equal intervals along its edge, and a temperature sensor is embedded inside the notch in the drill bit located below the machine body. A connecting block is rotatably connected to the top of the drill bit located above the machine body.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the coordinated setting of the adjustment mechanism and the moving rod, realizes the synchronous radial extension and retraction of three pairs of traveling wheels, adapts in real time to multi-stage variable diameter well sections, and can complete continuous exploration of the entire well section in one go without changing tools, significantly shortening the construction cycle and reducing operating costs.

[0015] 2. This invention uses a tracked anti-slip component to cover the electric roller and driven wheel, forming a closed-loop traction in scaling, erosion, or water-bearing well sections, increasing the contact area and friction coefficient, completely overcoming the risks of slippage and falling, and ensuring reliable movement and data transmission in high-temperature and high-humidity environments at depths of 3000 m and above.

[0016] 3. This invention uses an integrated drilling mechanism consisting of a pair of drill bits and an embedded temperature sensor to simultaneously break up blockages and collect in-situ temperatures in real time during the drilling process. Combined with the self-cleaning function of the spiral chip removal groove, it avoids drill jamming and displacement of measuring points, achieving integrated "exploration, cleaning, and measurement" and significantly improving the accuracy of geothermal anomaly zone evaluation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall main structure of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram of section A; Figure 4 For the present invention Figure 2 Enlarged structural diagram of section B; Figure 5 This is a schematic diagram of a partial cross-sectional structure of the fuselage of the present invention; Figure 6 This is a schematic diagram of the exploded structure of the rotating disk and the limiting block of the present invention.

[0018] Numbering on the map: 1. Body; 11. Partition; 2. Walking mechanism; 21. Bracket; 22. Support shaft; 23. Electric roller; 24. Anti-slip component; 241. Drive wheel; 242. Track; 25. Moving rod; 3. Drilling mechanism; 31. Connecting shaft; 32. Drill bit; 321. Notch; 322. Temperature sensor; 33. First drive assembly; 331. First servo motor; 332. First gear; 333. Second gear; 34. Connecting block; 4. Adjustment mechanism; 41. Sleeve rod; 42. Rotating disk; 421. Arc groove; 43. Limiting block; 44. Second drive assembly; 441. Worm gear; 442. Worm; 443. Second servo motor. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1-6 As shown, the present invention has the following three specific embodiments.

[0021] Example 1 A geological exploration geothermal detection device includes a body 1, with a partition 11 fixedly connected inside the body 1, dividing the body 1 into an upper chamber and a lower chamber by the partition 11. A traveling mechanism 2 is provided on the outer wall of the body 1 for moving the body 1 within the exploration well; it also includes: Drilling mechanism 3 is installed at the end of the machine body 1 and is used to remove blockages inside the exploration well; Adjustment mechanism 4 is installed inside the body 1. Adjustment mechanism 4 is used to adjust the walking mechanism 2 so that the body 1 can move inside exploration wells of different inner diameters. The walking mechanism 2 includes three pairs of brackets 21. The brackets 21 are equidistantly arranged on the outer wall of the body 1. Support shafts 22 are fixedly connected to the upper and lower sides of the brackets 21 away from the body 1. Electric rollers 23 are provided on the side wall of the support shafts 22 above the brackets 21. Driven wheels are rotatably connected to the side wall of the support shafts 22 below the brackets 21. Moving rods 25 are symmetrically fixedly connected to the upper and lower sides of the brackets 21 near the body 1. The ends of the moving rods 25 pass through the lower cavity and are slidably connected to the wall of the body 1. The walking mechanism 2 also includes an anti-slip component 24. The anti-slip component 24 includes a pair of drive wheels 241, which are fixedly connected to the outer walls of the electric roller 23 and the driven wheel, respectively. The two drive wheels 241 are connected by a track 242.

[0022] In this embodiment, as Figure 1 , Figure 2 , Figure 4 , Figure 6As shown, before the device enters the well, the six sets of moving rods 25 are in their shortest state, and the outer diameter of the entire machine is smaller than the wellhead casing, allowing it to be lowered to the bottom of the well in one go. After reaching the target depth, the adjustment mechanism 4 is activated, the moving rods 25 extend outwards synchronously, and the tracks 242 are pressed against the well wall; the electric rollers 23 rotate, driving the tracks 242 to circulate through the drive wheel 241, and the machine body 1 begins to move upwards at a constant speed. When encountering mud cakes or debris accumulation along the way, the drilling mechanism 3 is activated, thereby causing rock cuttings to rise along the spiral groove and be carried away by the well fluid, keeping the area in front of the probe clear. When the well diameter suddenly expands, the moving rods 25 automatically continue to push outwards, and the tracks 242 always hold the well wall to avoid slippage; when encountering a section with a reduced diameter, the moving rods 25 retract accordingly, allowing the tracks 242 to maintain a constant positive pressure and achieve continuous movement. Throughout the process, the temperature sensor 322 embedded in the notch 321 of the drill bit 32 records the in-situ temperature in real time, and the data is transmitted directly to the ground via cable, completing the full-section well detection by "clearing obstacles, measuring temperature, and moving simultaneously". After the exploration is completed, the moving rod 25 is retracted, the outer diameter of the device is restored to its minimum state, and it is smoothly lifted to the wellhead by the winch.

[0023] Example 2 The difference from Embodiment 1 is that this embodiment discloses the specific structure of the adjustment mechanism 4; The adjustment mechanism 4 includes a pair of rotating disks 42, which are rotatably connected to the upper and lower sides of the lower chamber respectively. A sleeve rod 41 is fixedly connected between the pair of rotating disks 42. The sleeve rod 41 is located at the axis of the rotating disks 42. Arc-shaped grooves 421 are equally spaced on the opposite end face of the rotating disks 42. Limiting blocks 43 are slidably connected inside the arc-shaped grooves 421. The end of the limiting block 43 is fixedly connected to the side wall of the moving rod 25. The adjustment mechanism 4 also includes a second drive assembly 44. The second drive assembly 44 includes a worm gear 441, which is fixedly connected to the outer wall of the sleeve rod 41. A worm 442 is rotatably connected to the inner wall of the lower cavity through a bearing seat. The worm 442 meshes with the worm gear 441. A second servo motor 443 is fixedly connected to the front end of the bearing seat. The output shaft end of the second servo motor 443 is fixedly connected to the front end of the worm 442.

[0024] In this embodiment, as Figures 5-6As shown, when the machine body 1 needs to adapt to changes in well diameter, the second servo motor 443 drives the worm gear 442 to rotate, and the worm gear 442 drives the worm wheel 441 and the sleeve rod 41 to rotate slowly together; the upper and lower rotating disks 42 rotate synchronously with the sleeve rod 41, and the arc groove 421 generates circumferential displacement accordingly. The limiting block 43 inserted in the arc groove 421 is forced to slide along the groove wall; since the limiting block 43 is fixedly connected to the moving rod 25, the moving rod 25 can only move linearly within the radial slide of the machine body 1. Thus, the rotational motion of the arc groove 421 is converted into the radial extension and retraction motion of the moving rod 25; the six sets of moving rods 25 extend or retract simultaneously, and the positive pressure of the track 242 on the well wall remains consistent, completing the rapid adjustment during the diameter change process. The self-locking characteristic of the worm wheel 441 and worm gear 442 can automatically lock after the motor stops, preventing the well wall from pushing back and causing the moving rod 25 to retract, ensuring that the device can stay stably in any well diameter section.

[0025] Example 3 The difference from Embodiment 2 is that this embodiment discloses the specific structure of the drilling mechanism 3; The drilling mechanism 3 includes a connecting shaft 31, which is rotatably connected inside the partition plate 11. The lower side wall of the connecting shaft 31 passes through the sleeve rod 41 and is rotatably connected thereto. Both the upper and lower ends of the connecting shaft 31 pass through to the outside of the machine body 1 and are rotatably connected to the wall of the machine body 1. Both the upper and lower ends of the connecting shaft 31 are fixedly connected to the drill bit 32. The outer wall of the drill bit 32 is provided with spiral patterns. The drilling mechanism 3 also includes a first drive assembly 33. The first drive assembly 33 includes a first servo motor 331, which is fixedly connected to the lower end of the partition 11. A first gear 332 is fixedly connected to the output shaft end of the first servo motor 331. A second gear 333 meshes with the side wall of the first gear 332. The inner wall of the second gear 333 is fixedly connected to the outer wall of the connecting shaft 31. The drill bit 32 has notches 321 evenly spaced along its edge. A temperature sensor 322 is embedded inside the notch 321 in the drill bit 32 located below the body 1. A connecting block 34 is rotatably connected to the top of the drill bit 32 located above the body 1. In this embodiment, as Figures 2-3 As shown, when the device moves inside the well, the first servo motor 331 drives the second gear 333 to rotate via the first gear 332, causing the connecting shaft 31 to rotate continuously at a low speed at the center of the sleeve 41. The drill bits 32 at both ends cut synchronously, and the spiral grooves transport the broken rock cuttings upwards along the channel, keeping the area below the probe clear. A temperature sensor 322 is embedded in the notch 321 of the drill bit 32 at the lower end of the machine body 1. During the cutting process, the sensor directly contacts the newly exposed surface of the well wall, collecting in-situ temperature signals in real time. The entire drilling and temperature measurement actions are completed synchronously, realizing an integrated operation of "drilling, clearing obstacles, and measuring temperature simultaneously".

[0026] The working principle of this invention is as follows: The entire machine retracts to its minimum outer diameter and is lowered to the predetermined depth in one go by the wellhead winch; then the second servo motor 443 drives the worm gear 442 to rotate, the rotating worm gear 442 drives the worm wheel 441 to rotate, causing the rotating disk 42 to rotate, the arc groove 421 pushes the limit block 43, the six sets of moving rods 25 extend outwards synchronously, and the track 242 presses against the well wall to complete the radial positioning and initial pressure setting; The electric roller 23 drives the track 242 to rotate in a cycle via the drive wheel 241, and the machine body 1 rises and falls at a constant speed. When the well diameter changes suddenly, the rotating disk 42 continues to rotate, and the moving rod 25 extends and retracts in real time to maintain the positive pressure between the track 242 and the well wall, so as to achieve continuous anti-slip walking. The first servo motor 331 drives the connecting shaft 31 via a gear pair, and the upper and lower drill bits 32 rotate at low speeds simultaneously. The spiral pattern cuts through the blockage and transports the rock cuttings upwards, while the well fluid flows in the opposite direction to carry away the waste residue and keep the front passage open. Temperature sensor 322 inside notch 321 of the lower drill bit 32 is exposed to the fresh well wall at the moment of cutting, and the in-situ temperature signal is transmitted back to the ground in real time via cable, realizing the synchronization of "drilling-cleaning-testing"; After the exploration is completed, the second servo motor 443 rotates in the opposite direction, the moving rod 25 is fully retracted, the outer diameter is restored to its minimum, and the winch smoothly lifts the device to the wellhead. The entire process does not require tool replacement or additional well repair.

[0027] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A geological exploration geothermal detection device, comprising a fuselage (1), characterized in that, The fuselage (1) is internally fixedly connected to a partition (11), which divides the fuselage (1) into an upper chamber and a lower chamber. A traveling mechanism (2) is provided on the outer wall of the fuselage (1), which is used to move the fuselage (1) within the exploration well. The fuselage (1) also includes: Drilling mechanism (3), which is installed at the end of the body (1), is used to remove blockages inside the exploration well; Adjustment mechanism (4) is installed inside the body (1). The adjustment mechanism (4) is used to adjust the walking mechanism (2) so that the body (1) can move inside exploration wells with different inner diameters.

2. The geological exploration geothermal detection device according to claim 1, characterized in that, The walking mechanism (2) includes three pairs of brackets (21). The brackets (21) are equidistantly arranged on the outer wall of the body (1). Support shafts (22) are fixedly connected to the upper and lower sides of the bracket (21) away from the body (1). Electric rollers (23) are provided on the side wall of the support shaft (22) above the bracket (21). Driven wheels are rotatably connected to the side wall of the support shaft (22) below the bracket (21). Moving rods (25) are symmetrically fixedly connected to the upper and lower sides of the bracket (21) near the body (1). The end of the moving rod (25) passes through the lower cavity and is slidably connected to the wall of the body (1). The walking mechanism (2) also includes an anti-slip component (24).

3. The geological exploration geothermal detection device according to claim 2, characterized in that, The anti-slip component (24) includes a pair of drive wheels (241), which are fixedly connected to the outer walls of the electric roller (23) and the driven wheel, respectively, and the two drive wheels (241) are connected by a track (242).

4. The geological exploration geothermal detection device according to claim 1, characterized in that, The adjustment mechanism (4) includes a pair of rotating disks (42), which are rotatably connected to the upper and lower sides of the lower chamber respectively. A sleeve rod (41) is fixedly connected between the pair of rotating disks (42). The sleeve rod (41) is located at the axis of the rotating disk (42). Arc-shaped grooves (421) are equally spaced on one end face of the rotating disk (42). A limit block (43) is slidably connected inside the arc-shaped groove (421). The end of the limit block (43) is fixedly connected to the side wall of the moving rod (25). The adjustment mechanism (4) also includes a second drive assembly (44).

5. A geological exploration geothermal detection device according to claim 4, characterized in that, The second drive assembly (44) includes a worm gear (441), which is fixedly connected to the outer wall of the sleeve rod (41). The inner wall of the lower cavity is rotatably connected to a worm (442) through a bearing seat. The worm (442) meshes with the worm gear (441). A second servo motor (443) is fixedly connected to the front end of the bearing seat. The output shaft end of the second servo motor (443) is fixedly connected to the front end of the worm (442).

6. A geological exploration geothermal detection device according to claim 1, characterized in that, The drilling mechanism (3) includes a connecting shaft (31), which is rotatably connected inside the partition plate (11). The lower side wall of the connecting shaft (31) passes through the sleeve rod (41) and is rotatably connected thereto. Both the upper and lower ends of the connecting shaft (31) pass through to the outside of the machine body (1) and are rotatably connected to the wall of the machine body (1). Both the upper and lower ends of the connecting shaft (31) are fixedly connected to a drill bit (32). The outer wall of the drill bit (32) is provided with a spiral pattern. The drilling mechanism (3) also includes a first drive assembly (33).

7. A geological exploration geothermal detection device according to claim 6, characterized in that, The first drive assembly (33) includes a first servo motor (331), which is fixedly connected to the lower end of the partition (11). The output shaft end of the first servo motor (331) is fixedly connected to a first gear (332), and a second gear (333) meshes with the side wall of the first gear (332). The inner wall of the second gear (333) is fixedly connected to the outer wall of the connecting shaft (31).

8. A geological exploration geothermal detection device according to claim 6, characterized in that, The drill bit (32) has notches (321) at equal intervals along its edge. A temperature sensor (322) is embedded in the notch (321) of the drill bit (32) located below the body (1). A connecting block (34) is rotatably connected to the top of the drill bit (32) located above the body (1).

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