Mining equipment and method based on geothermal energy development

Abstract

The invention relates to the technical field of mining equipment, and discloses mining equipment for geothermal energy development, which comprises a rack and an underground mining assembly, the underground mining assembly comprises a mining drill bit and a telescopic drill rod, the mining drill bit is located at the bottom end of the telescopic drill rod, a gap exists between the mining drill bit and the telescopic drill rod, and the top end of the telescopic drill rod is connected with the rack. A containing cavity used for containing a driving device is formed in the bottom end of the telescopic drill rod, the driving device is arranged in the containing cavity, and the driving end of the driving device is connected with the mining drill bit through a driving shaft penetrating out of the containing cavity. A scraper assembly is further arranged outside the telescopic drill rod and is in transmission connection with the driving device through a transmission assembly, and when the driving device drives the mining drill bit to conduct rotary mining, the transmission assembly drives the scraper assembly to rotate outside the telescopic drill rod so as to scrape and clean the well wall. And the geothermal drilling exploitation efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of mining equipment, and specifically discloses a mining equipment and method for geothermal energy development. Background Art

[0002] As a clean and renewable energy, the development and utilization of geothermal energy is of great significance for reducing dependence on fossil energy and reducing greenhouse gas emissions. Geothermal energy development mainly involves the exploitation of geothermal steam and geothermal water, a process that requires specific mining equipment. Existing geothermal energy development equipment has some limitations and defects in design and function, especially in underground operating environments, where high temperature, high pressure and corrosive conditions pose severe challenges to the stability and efficiency of the equipment.

[0003] In the existing technology, geothermal mining equipment usually includes drilling equipment and downhole cleaning equipment. The drilling equipment is used to drill geothermal wells, while the downhole cleaning equipment is used to clean up the slag and rock debris generated during the drilling process. However, the existing equipment has deficiencies in the efficiency of well wall cleaning and slag collection. For example, during the rotation of the mining drill bit, slag and rock debris on the well wall are easily accumulated, resulting in drilling blockage, affecting drilling efficiency and equipment performance. In addition, the slag collection efficiency is low, resulting in increased slag treatment costs and possible environmental pollution.

[0004] Therefore, the present application specifically proposes a mining device and method for geothermal energy development. Summary of the invention

[0005] The purpose of the present invention is to provide a mining device and method for geothermal energy development to solve one of the above-mentioned technical problems existing in the prior art.

[0006] Specifically, the present invention is achieved through the following technical solutions:

[0007] A mining device for geothermal energy development, comprising a frame and an underground mining assembly, wherein the underground mining assembly comprises a mining drill bit and a telescopic drill rod, wherein the mining drill bit is located at the bottom end of the telescopic drill rod and has a gap with the telescopic drill rod, wherein the top end of the telescopic drill rod is connected to the frame, wherein a receiving chamber for receiving a driving device is provided at the bottom end of the telescopic drill rod, wherein the driving device is provided in the receiving chamber, and wherein the driving end of the driving device is connected to the mining drill bit via a driving shaft penetrating the outside of the receiving chamber;

[0008] Outside the telescopic drill pipe, a scraper assembly is further provided. The scraper assembly is传动连接 with the driving device through a transmission assembly. When the driving device drives the mining drill bit to rotate for mining, the transmission assembly drives the scraper assembly to rotate outside the telescopic drill pipe to scrape and clean the well wall. The scraper assembly includes a rotating sleeve and scraper plates. The scraper plates are arranged in an array outside the rotating sleeve, and each scraper plate includes a vertical plate and a scraper. The vertical plate is attached to the outer peripheral surface of the rotating sleeve, and the scrapers are symmetrically arranged on both sides of the vertical plate and form a U-shaped structure with the vertical plate.

[0009] Preferably, a ring-shaped groove is formed in the outer part of the telescopic drill pipe corresponding to the position of the rotating sleeve. The rotating sleeve is rotationally embedded in the ring-shaped groove. A circumferential annular cavity is formed in the lower part of the inner wall of the accommodating cavity. The annular cavity is communicated with the ring-shaped groove through a plurality of through holes.

[0010] Furthermore, the transmission assembly includes a driven gear ring, a transmission gear rod, and a driving gear. The driven gear ring is sleeved on the inner ring surface of the rotating sleeve located in the ring-shaped groove. The transmission gear rod includes a transmission rod, a first transmission wheel, and a second transmission wheel. The transmission rod is correspondingly arranged in a plurality of the through holes and is rotationally matched with them, and its two ends respectively penetrate into the ring-shaped groove and the annular cavity. The first transmission wheel is arranged in the ring-shaped groove and is connected to the end of the transmission rod penetrating into the ring-shaped groove, and the first transmission wheel meshes with the inner ring surface of the driven gear ring. The second transmission wheel is located in the annular cavity and is connected to the end of the transmission rod penetrating into the annular cavity. The driving gear is sleeved on the outer part of the driving shaft of the driving device located in the accommodating cavity, and the driving gear meshes with the second transmission wheel.

[0011] As a preferred technical solution, a cleaning mechanism is further provided on the scraper assembly. The cleaning mechanism includes a sleeve, a support rod, and a cleaning plate. The sleeve is connected to the vertical plate, and a spiral spring is coaxially arranged inside it. The support rod is sleeved in the sleeve and passes through the spiral spring, and a protruding retaining ring that abuts against the bottom end of the spiral spring is arranged on the rod body of the support rod located inside the sleeve. The cleaning plate is horizontally slidably installed on the scraper, and both ends of the cleaning plate are close to the scraper and fit with the surface of the scraper. The upper parts of the cleaning plates all extend upward and gradually approach the vertical plate to form a cleaning inclined surface.

[0012] As a further preferred technical solution, a baffle assembly is further provided in the gap between the mining drill bit and the telescopic drill pipe. The baffle assembly includes a mud guard ring sleeved on the shaft body of the driving shaft located outside the accommodating cavity, and a baffle sleeved on the outside of the mud guard ring. A pushing mechanism corresponding to the cleaning mechanism is arranged on the upper part of the baffle. The pushing mechanism includes a plurality of collision blocks arranged in an array, and a convex spherical surface that cooperates with the impact ball at the bottom end of the support rod is arranged on the upper part of each collision block.

[0013] Furthermore, it also includes a slag collection component, which includes a slag box, a slag bucket and a telescopic slag discharge pipe. The slag box is arranged on the frame, the slag bucket is arranged at the bottom of the baffle, and an opening penetrating the baffle is arranged at the top of the telescopic slag discharge pipe. The telescopic slag discharge pipe is passed through the interior of the telescopic drill rod, and the top and bottom ends of the telescopic slag discharge pipe are respectively connected to the slag box and the slag bucket.

[0014] A method for exploiting geothermal energy is provided based on an exploitation device for exploiting geothermal energy. The method comprises the following steps:

[0015] S1. Equipment deployment: deploy the mining equipment to the corresponding geothermal wellhead and ensure that the frame is stable so that the telescopic drill rod and the mining drill bit are vertically aligned with the wellhead;

[0016] S2, start the machine, start the driving device and the telescopic drill rod, the driving device drives the mining drill bit to rotate through the driving shaft, and the telescopic drill rod is extended to start the geothermal well drilling work;

[0017] S3, well wall cleaning: as the mining drill bit rotates, the driving device drives the scraper assembly to rotate through the transmission assembly, and the vertical plate and scraper on the scraper assembly scrape and clean the well wall to keep the well wall unobstructed;

[0018] S4, slag collection. During the mining process, the scraper assembly rotates and the scraper soil scraped off falls on the baffle and enters the slag collecting bucket through the opening at the bottom of the baffle. At the same time, the scraper assembly rotates and cooperates with the pushing mechanism to push the cleaning mechanism to clean the slag attached to the surface of the scraper assembly. The cleaned slag also falls on the baffle and enters the slag collecting bucket through the opening. The slag in the slag collecting bucket is transported to the slag collecting box through the telescopic slag discharge pipe to complete the slag collection;

[0019] S5. Mining process supervision: During the entire mining process, the underground temperature, pressure and other parameters are monitored in real time, and the speed of the drive device and the cleaning intensity of the scraper assembly are adjusted according to the actual situation to ensure the efficiency and safety of the mining process;

[0020] S6. After the mining is finished and the drilling to the predetermined depth is completed, the operation of the driving device and the telescopic drill rod is stopped, and the telescopic drill rod is gradually retracted to lift the mining drill bit out of the well.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] 1. Through the settings of the driving device and the scraper assembly, when the driving device drives the mining bit to rotate for mining, the scraper assembly can be driven to rotate synchronously. Since the scraper assembly includes a rotating sleeve and scraper plates, the scraper plates are arranged in an array outside the rotating sleeve and are composed of vertical plates and scrapers. Therefore, when the scraper assembly rotates outside the telescopic drill pipe, it can closely adhere to the wellbore and continuously clean the wellbore. At the same time, the scraper and the vertical plate of this solution form a U-shaped structure, which increases the contact area between the scraper and the wellbore, enabling the scraper to more thoroughly remove the muck and cuttings on the wellbore during rotation. Furthermore, it avoids the blockage of the drilling due to the falling of muck and cuttings on the wellbore during the mining process of the bit, thus greatly improving the drilling and mining efficiency of the mining bit;

[0023] 2. The present invention further sets a transmission assembly between the driving device and the scraper assembly, and transmits the power of the driving device to the scraper assembly through the transmission assembly to make the scraper assembly rotate. Since the transmission assembly includes a driven gear ring, a transmission gear rod, and a driving gear, it essentially constitutes a planetary gear set, which not only realizes the effective transmission of power but also makes the rotation direction of the scraper assembly opposite to the rotation direction of the mining bit. Therefore, when the mining bit rotates and drills downward, the cutting force exerted on the wellbore causes the muck and cuttings to be sheared and extruded. At the same time, the reverse rotation of the scraper assembly exerts a cutting force in the opposite direction on the muck and cuttings on the wellbore. This opposite force makes the muck and cuttings experience a more complex stress environment, which further accelerates the shedding of the muck and cuttings, effectively peeling and removing the muck and cuttings from the wellbore, reducing the residence time of the muck and cuttings on the wellbore, and thus improving the cleaning efficiency;

[0024] 3. The present invention further sets a cleaning mechanism and a pushing mechanism. Among them, the cleaning mechanism is composed of a sleeve, a support rod, and a cleaning plate. The sleeve is connected to the vertical plate and coaxially provided with a spiral spring inside it. The support rod is sleeved in the sleeve and passes through the spiral spring. The cleaning plate is horizontally slidably installed on the scraper, and its two ends are bent upward to form bending parts that fit the surface of the scraper. The upper parts of the cleaning plate and the bending parts both extend upward and gradually approach the vertical plate and the scraper to form a cleaning inclined surface. The pushing mechanism includes a number of collision blocks arranged in an array, and convex spherical surfaces that cooperate with the impact balls at the bottom of the support rod are provided on the upper parts of these collision blocks. Therefore, when the cleaning mechanism rotates with the scraper assembly, the convex spherical surface at the bottom of its support rod can collide with the collision blocks on the baffle periodically, thereby pushing the support rod to move reciprocally up and down in the sleeve through the collision, so that after the support rod moves reciprocally up and down, it pushes the cleaning plate to clean and scrape the muck and cuttings attached to the surfaces of the vertical plate and the scraper, thus avoiding the attachment of muck and cuttings to the vertical plate and the scraper and affecting the cleaning effect of the scraping assembly on the muck and cuttings on the wellbore, and further improving its cleaning efficiency;

[0025] 4. The present invention is ingeniously provided with a baffle assembly and a slag collecting assembly, wherein the baffle assembly includes a mud guard ring and a baffle sleeved on the outside of the mud guard ring. Since the mud guard ring is tightly sleeved on the shaft of the driving shaft located outside the accommodating cavity, and the baffle sleeved on the periphery of the mud guard ring, when the mining drill is mining, the upper part of the mining drill can be shielded and protected to prevent the well wall slag and rock cuttings from falling on the mining drill, thereby avoiding a negative impact on the drilling efficiency and structural safety of the drill, and the slag collecting assembly includes a slag collecting box , a slag collecting bucket and a telescopic slag discharge pipe, and the slag collecting box is arranged on the frame, and the slag collecting bucket is arranged at the bottom of the baffle, and an opening penetrating the baffle is arranged on the top, and the telescopic slag discharge pipe is passed through the inside of the telescopic drill rod, and the top and bottom ends are respectively connected with the slag collecting box and the slag collecting bucket, so that when the mining drill bit is in the drilling process, the slag and rock cuttings blocked by the baffle can directly fall into the slag collecting bucket through the through hole and be transported to the slag collecting box through the telescopic slag discharge pipe, so as to realize the continuous collection and transportation of slag in the drilling and mining process, and avoid the accumulation of slag and rock cuttings to affect the mining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 For the present invention Figure 1 A partial enlarged structural diagram of the A is intended to show the specific structure of the mining drill bit;

[0029] Figure 3 It is a schematic diagram of the structure of the scraper assembly of the present invention;

[0030] Figure 4 It is a schematic diagram of the top view of the scraper assembly of the present invention;

[0031] Figure 5 It is a schematic diagram of the baffle structure of the present invention;

[0032] Figure 6 Schematic diagram of the method steps of Example 2 of the present invention.

[0033] The reference numerals represent: 1. frame; 20. telescopic drill rod; 200. driving device; 201. driving shaft; 21. mining drill bit; 30. rotating sleeve; 31. scraper plate; 310. vertical plate; 311. scraper; 40. driven gear ring; 41. transmission gear rod; 410. transmission rod; 411. first transmission wheel; 412. second transmission wheel; 42. driving gear; 5. cleaning mechanism; 50. sleeve; 51. support rod; 52. cleaning plate; 520. cleaning slope; 53. impact ball; 60. mud guard ring; 61. baffle; 62. collision block; 70. slag collecting box; 71. slag collecting bucket; 72. telescopic slag discharge pipe. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation modes and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual development and use stage.

[0035] It should be understood that this technical solution proposes an integrated mining device to address the high temperature, high pressure and corrosive conditions faced by existing geothermal energy development equipment in underground operating environments, as well as the low efficiency of well wall cleaning and low efficiency of slag collection. The device achieves efficient drilling and well wall cleaning of geothermal wells through the coordinated work of the frame and underground mining components, effectively solving the defects in the prior art, as described in the following embodiments.

[0036] Embodiment 1:

[0037] See also Figures 1 to 5 As shown, this embodiment discloses a mining device for geothermal energy development, including a frame 1 and an underground mining assembly, wherein the underground mining assembly includes a mining drill bit 21 and a telescopic drill rod 20, wherein the mining drill bit 21 is located at the bottom end of the telescopic drill rod 20, and there is a gap between the mining drill bit 21 and the telescopic drill rod 20, wherein the top end of the telescopic drill rod 20 is connected to the frame 1, and a receiving cavity for receiving a driving device 200 is provided at the bottom end of the telescopic drill rod 20, wherein the driving device 200 is provided in the receiving cavity, and the driving end of the driving device 200 is connected to the mining drill bit 21 via a driving shaft 201 penetrating to the outside of the receiving cavity;

[0038] An external scraper assembly is further provided on the telescopic drill pipe 20. The scraper assembly is in transmission connection with the driving device 200 through a transmission assembly. When the driving device 200 drives the mining bit 21 to rotate for mining, the transmission assembly drives the scraper assembly to rotate outside the telescopic drill pipe 20 to scrape and clean the well wall. The scraper assembly includes a rotating sleeve 30 and scraper plates 31. The scraper plates 31 are arranged in an array outside the rotating sleeve 30. The scraper plate 31 includes a vertical plate 310 and a scraper 311. The vertical plate 310 is attached to the outer peripheral surface of the rotating sleeve 30. The scrapers 311 are symmetrically arranged on both sides of the vertical plate 310 and form a U-shaped structure with the vertical plate 310.

[0039] It should be noted that in the prior art during geothermal mining, due to the absence of a scraper assembly, during drilling and mining, muck and cuttings will accumulate between the well wall and the drill pipe, resulting in drilling blockage, affecting the drilling efficiency and equipment performance. In severe cases, it may even lead to increased wear of the drill bit and shortened service life. Therefore, to solve this problem, in this embodiment, through the arrangement of the driving device 200 and the scraper assembly, when the driving device 200 drives the mining bit 21 to rotate for mining, the scraper assembly can be driven to rotate synchronously. Specifically, the scraper assembly includes a rotating sleeve 30 and scraper plates 31. The scraper plates 31 are arranged in an array outside the rotating sleeve 30 and are composed of a vertical plate 310 and a scraper 311. Therefore, during implementation, when the scraper assembly rotates outside the telescopic drill pipe 20, it can closely adhere to the well wall and continuously clean the well wall. At the same time, the scraper of this solution forms a U-shaped structure with the vertical plate 310, which increases the contact area between the scraper and the well wall, enabling the scraper to more thoroughly remove the muck and cuttings on the well wall during rotation. Furthermore, it avoids the blockage of the drilling caused by the falling of muck and cuttings on the well wall during the mining process of the drill bit, thereby greatly improving the drilling and mining efficiency of the mining bit 21, and at the same time effectively preventing the wear of the mining bit 21 by the muck and cuttings and extending its service life.

[0040] As a specific implementation manner of the above embodiment, as Figure 2 , a ring-shaped groove is formed at the position corresponding to the rotating sleeve 30 on the outer part of the telescopic drill pipe 20. The rotating sleeve 30 is rotatably embedded in the ring-shaped groove. A circumferential cavity is formed at the lower part of the inner wall of the accommodating cavity and extends around it for one week. The circumferential cavity is communicated with the ring-shaped groove through a plurality of through holes.

[0041] It should be understood that the annular groove is provided to enable the rotating sleeve 30 to be rotatably embedded therein and to provide a stable installation foundation for it. The rotating sleeve 30 is rotatably embedded in the annular groove. Since the rotating sleeve 30 is a part of the scraper assembly, its rotation can drive the scraper plate 31 to perform cleaning operations. An annular cavity is provided at the lower part of the inner wall of the accommodating chamber. This cavity surrounds the accommodating chamber. Its purpose is to provide space for the transmission assembly. At the same time, the annular cavity and the annular groove are connected by a number of through holes. These through holes allow the two ends of the transmission rod 410 of the transmission assembly to pass through the annular groove and the annular cavity respectively, thereby realizing efficient power transmission to ensure the stable operation of the scraper assembly.

[0042] More specifically, if Figure 2 and Figure 4 The transmission assembly includes a driven gear ring 40, a transmission gear rod 41 and a driving gear 42. The driven gear ring 40 is sleeved on the inner ring surface of the rotating sleeve 30 located in the annular groove. The transmission gear rod 41 includes a transmission rod 410, a first transmission wheel 411 and a second transmission wheel 412. The transmission rod 410 is correspondingly arranged in a plurality of the through holes and rotates with them, and its two ends respectively penetrate into the annular groove and the annular cavity. The first transmission wheel 411 is arranged in the annular groove and connected to one end of the transmission rod 410 that penetrates into the annular groove, and the first transmission wheel 411 is meshed with the inner ring surface of the driven gear ring 40. The second transmission wheel 412 is located in the annular cavity and connected to one end of the transmission rod 410 that penetrates into the annular cavity. The driving gear 42 is sleeved on the outside of the driving shaft 201 of the driving device 200 located in the accommodating cavity, and the driving gear 42 is meshed with the second transmission wheel 412.

[0043] Based on the above embodiment, it should be noted that, since the transmission assembly includes the driven gear ring 40, the transmission gear rod 41 and the driving gear 42, it essentially constitutes a planetary gear set, which not only realizes the effective transmission of power, but also makes the rotation direction of the scraper assembly opposite to the rotation direction of the mining drill bit 21. Therefore, when the mining drill bit 21 is drilling downward through rotation, the cutting force it applies to the well wall causes the slag and rock cuttings to be sheared and squeezed. At the same time, the reverse rotation of the scraper assembly applies a cutting force in the opposite direction to the slag and rock cuttings on the well wall. This opposite force action causes the slag and rock cuttings to be subjected to more complex The complex force environment further accelerates the shedding of debris and rock cuttings, thereby effectively stripping and removing the debris and rock cuttings from the well wall, reducing the residence time of the debris and rock cuttings on the well wall, thereby improving the removal efficiency; that is to say, since the rotation direction of the scraper assembly is opposite to that of the mining drill bit 21, at the moment the scraper assembly contacts the well wall, the scraping force of its scraper 311 on the debris and rock cuttings is opposite to the propulsion direction of the drill bit. This reverse scraping action is similar to reverse cleaning, which can effectively strip and remove the debris and rock cuttings from the well wall, thereby reducing the residence time of the debris and rock cuttings on the well wall, thereby further improving the removal efficiency.

[0044] As a preferred implementation method, Figure 3 A cleaning mechanism 5 is also provided on the scraper assembly, and the cleaning mechanism 5 includes a sleeve 50, a support rod 51 and a cleaning plate 52. The sleeve 50 is connected to the vertical plate 310, and a coil spring is coaxially provided inside the sleeve 50. The support rod 51 is sleeved in the sleeve 50 and passes through the coil spring. A raised retaining ring abutting against the bottom end of the coil spring is provided on the rod body of the support rod 51 located inside the sleeve 50. The cleaning plate 52 is laterally slidably installed on the scraper, and both ends of the cleaning plate 52 are close to the scraper and fit with the scraper surface. The upper part of the cleaning plate 52 extends upward and gradually approaches the vertical plate 310 to form a cleaning slope 520.

[0045] It is further preferred that a baffle 61 assembly is further provided in the gap between the mining drill bit 21 and the telescopic drill rod 20, the baffle 61 assembly comprising a mud guard ring 60 sleeved on the shaft body of the driving shaft 201 located outside the accommodating chamber, a baffle 61 sleeved outside the mud guard ring 60, a pushing mechanism corresponding to the cleaning mechanism is provided on the upper part of the baffle 61, the pushing mechanism comprises a plurality of collision blocks arranged in an array, the upper part of the collision block is provided with a convex spherical surface matching with the collision ball 53 at the bottom end of the support rod 51, Figure 5 It has been shown in .

[0046] It should be noted that the cleaning mechanism 5 in this embodiment is composed of a sleeve 50, a support rod 51 and a cleaning plate 52. The sleeve 50 is connected to the vertical plate 310 and is coaxially provided with a coil spring inside the sleeve 50. The support rod 51 is sleeved in the sleeve 50 and passes through the coil spring. The cleaning plate 52 is slidably installed on the scraper plate, and its two ends are bent upward to form a bent portion that fits the scraper surface. The upper parts of the cleaning plate 52 and the bent portion extend upward and gradually approach the vertical plate 310 and the scraper 311 to form a cleaning slope 520. The pushing mechanism includes a plurality of collision blocks 62 arranged in an array, and the upper parts of these collision blocks 62 are provided with The convex spherical surface cooperates with the impact ball 53 at the bottom end of the support rod 51. Therefore, when the cleaning mechanism 5 rotates with the scraper assembly, the convex spherical surface at the bottom end of the support rod 51 can periodically collide with the collision block 62 on the baffle 61, thereby pushing the support rod 51 to move back and forth up and down in the sleeve 50 through the collision, so that after the support rod 51 moves back and forth up and down, it pushes the cleaning plate 52 to clean and scrape the debris and rock chips attached to the surface of the vertical plate 310 and the scraper 311, thereby avoiding the debris and rock chips from adhering to the vertical plate 310 and the scraper 311, and affecting the cleaning effect of the scraping assembly on the debris and rock chips on the well wall, so as to further improve its cleaning efficiency.

[0047] At the same time, based on the above embodiment, it should be supplemented that a mining equipment based on geothermal energy development also includes a slag collection component, which includes a slag box 70, a slag bucket 71 and a telescopic slag discharge pipe 72. The slag box 70 is arranged on the frame 1, and the slag bucket 71 is arranged at the bottom of the baffle 61, and an opening penetrating the baffle 61 is provided at the top thereof. The telescopic slag discharge pipe 72 is passed through the interior of the telescopic drill rod 20, and the top and bottom ends thereof are respectively connected to the slag box 70 and the slag bucket 71.

[0048] The baffle 61 assembly includes a mud guard ring 60 and a baffle 61 sleeved on the outside of the mud guard ring 60. Since the mud guard ring 60 is tightly sleeved on the shaft of the driving shaft 201 located outside the accommodating cavity, and the baffle 61 is sleeved on the periphery of the mud guard ring 60, it can shield and protect the upper part of the mining drill bit 21 when the mining drill bit 21 is mining, so as to prevent the well wall debris and rock cuttings from falling on the mining drill bit 21, thereby avoiding negative impact on the drilling efficiency and structural safety of the drill bit. The slag collection assembly includes a slag box 70, a slag bucket 71 and a telescopic slag discharge pipe 72, and the slag box 70 is arranged on the frame 1, and the slag bucket 71 is arranged at the bottom of the baffle 61, and an opening penetrating the baffle 61 is arranged on the top. The telescopic slag discharge pipe 72 is passed through the interior of the telescopic drill rod 20, and the top and bottom ends are respectively connected to the slag box 70 and the slag bucket 71, so that when the mining drill bit 21 is drilling, the slag and rock cuttings blocked by the baffle 61 can directly fall into the slag bucket 71 through the through hole, and are transported to the slag box 70 through the telescopic slag discharge pipe 72. It should be understood that the slag discharge work of the telescopic slag discharge pipe 72 is realized based on the relevant slag discharge pump, and in the present application, for the slag discharge pump, it is preferably installed in the slag box 70 and connected to the top of the telescopic slag discharge pipe 72 to facilitate its slag discharge work, thereby realizing the continuous collection and transportation of slag during drilling and mining, and avoiding the accumulation of slag and rock cuttings affecting the mining efficiency.

[0049] Embodiment 2;

[0050] See also Figure 6 As shown, based on the mining equipment for geothermal energy development proposed in Example 1, this embodiment proposes a mining method for geothermal energy development. Specifically, the method includes the following steps:

[0051] S1, equipment deployment, deploying the mining equipment to the corresponding geothermal wellhead, and ensuring that the frame 1 is stable so that the telescopic drill rod 20 and the mining drill bit 21 are vertically aligned with the wellhead;

[0052] S2, start the machine, start the driving device 200 and the telescopic drill rod 20, the driving device 200 drives the mining drill bit 21 to rotate through the driving shaft 201, and the telescopic drill rod 20 is extended to start the drilling of the geothermal well;

[0053] S3, cleaning the well wall. As the mining drill bit 21 rotates, the driving device 200 drives the scraper assembly to rotate through the transmission assembly. The vertical plate 310 and the scraper 311 on the scraper assembly scrape and clean the well wall to keep the well wall unobstructed;

[0054] S4, slag collection. During the mining process, the slag scraped by the scraper assembly falls on the baffle 61 and enters the slag collecting bucket 71 through the opening at the bottom of the baffle 61. At the same time, the scraper assembly rotates and cooperates with the pushing mechanism to push the cleaning mechanism 5 to clean the slag attached to the surface of the scraper assembly. The cleaned slag also falls on the baffle 61 and enters the slag collecting bucket 71 through the opening. The slag in the slag collecting bucket 71 is transported to the slag collecting box 70 through the telescopic slag discharge pipe 72 to complete the slag collection.

[0055] S5, mining process supervision, during the entire mining process, real-time monitoring of underground temperature, pressure and other parameters, according to the actual situation to adjust the speed of the drive device 200 and the cleaning intensity of the scraper assembly to ensure the efficiency and safety of the mining process;

[0056] S6. After the mining is finished and the drilling to the predetermined depth is completed, the operation of the driving device 200 and the telescopic drill rod 20 is stopped, and the telescopic drill rod 20 is gradually retracted to lift the mining drill bit 21 out of the well.

[0057] The above specific implementation methods further describe the purpose, technical scheme and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of the present specification are schematic diagrams, which are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can implement, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of description, and are not used to limit the scope of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the present invention without substantially changing the technical content.

Claims

1. A mining device for geothermal energy development, comprising a frame (1) and an underground mining component, characterized in that: The downhole mining assembly includes a mining bit (21) and a telescopic drill pipe (20). The mining bit (21) is located at the bottom end of the telescopic drill pipe (20), and there is a gap between the mining bit (21) and the telescopic drill pipe (20). The top end of the telescopic drill pipe (20) is connected to the frame (1). A receiving cavity for receiving a driving device (200) is formed at the bottom end of the telescopic drill pipe (20). The driving device (200) is arranged in the receiving cavity, and the driving end of the driving device (200) is connected to the mining bit (21) through a driving shaft (201) penetrating to the outside of the receiving cavity. A scraper assembly is further arranged outside the telescopic drill pipe (20). The scraper assembly is in transmission connection with the driving device (200) through a transmission assembly. The scraper assembly includes a rotating sleeve (30) and scraper plates (31). The scraper plates (31) are arranged in an array outside the rotating sleeve (30). The scraper plate (31) includes a vertical plate (310) and a scraper (311). The vertical plate (310) is attached to the outer peripheral surface of the rotating sleeve (30). The scrapers (311) are symmetrically arranged on both sides of the vertical plate (310) and form a U-shaped structure with the vertical plate (310).

2. The mining equipment for geothermal energy development according to claim 1 is characterized in that: A ring-shaped embedding groove is formed at the position of the telescopic drill pipe (20) corresponding to the rotating sleeve (30). The rotating sleeve (30) is rotatably embedded in the ring-shaped embedding groove. A circumferential annular cavity is formed at the lower part of the inner wall of the receiving cavity. The annular cavity is communicated with the ring-shaped embedding groove through a plurality of through holes.

3. The mining equipment for geothermal energy development according to claim 2 is characterized in that: The transmission assembly includes a driven gear ring (40), a transmission gear rod (41) and a driving gear (42). The driven gear ring (40) is sleeved on the inner ring surface of the rotating sleeve (30) located in the ring-shaped embedding groove. The transmission gear rod (41) includes a transmission rod (410), a first transmission wheel (411) and a second transmission wheel (412). The transmission rod (410) is correspondingly arranged in a plurality of the through holes and is in rotational cooperation with them, and its two ends respectively penetrate to the ring-shaped embedding groove and the annular cavity. The first transmission wheel (411) is arranged in the ring-shaped embedding groove and is connected to the end of the transmission rod (410) penetrating into the ring-shaped embedding groove, and the first transmission wheel (411) meshes with the inner ring surface of the driven gear ring (40). The second transmission wheel (412) is located in the annular cavity and is connected to the end of the transmission rod (410) penetrating into the annular cavity. The driving gear (42) is sleeved outside the driving shaft (201) of the driving device (200) located in the receiving cavity, and the driving gear (42) meshes with the second transmission wheel (412).

4. The mining equipment for geothermal energy development according to claim 1 is characterized in that: The scraper assembly is also provided with a cleaning mechanism (5), the cleaning mechanism (5) comprising a sleeve (50), a support rod (51) and a cleaning plate (52); the sleeve (50) is connected to the vertical plate (310), and a coil spring is coaxially arranged inside the sleeve (50); the support rod (51) is sleeved in the sleeve (50) and passes through the coil spring; a raised retaining ring abutting against the bottom end of the coil spring is arranged on the rod body of the support rod (51) located inside the sleeve (50); the cleaning plate (52) is slidably mounted on the scraper in a transverse direction, and both ends of the cleaning plate (52) are close to the scraper and fit the surface of the scraper; the upper part of the cleaning plate (52) extends upward and gradually approaches the vertical plate (310) to form a cleaning slope (520).

5. The mining equipment for geothermal energy development according to claim 4 is characterized in that: A baffle (61) assembly is also provided in the gap between the mining drill bit (21) and the telescopic drill rod (20), the baffle (61) assembly comprising a mud guard ring (60) sleeved on the shaft body of the driving shaft (201) located outside the accommodating chamber, a baffle (61) sleeved outside the mud guard ring (60), a pushing mechanism corresponding to the cleaning mechanism is provided on the upper part of the baffle (61), the pushing mechanism comprises a plurality of collision blocks (62) arranged in an array, and the upper part of the collision block (62) is provided with a convex spherical surface that matches the collision ball (53) at the bottom end of the support rod (51).

6. The mining equipment for geothermal energy development according to claim 5, characterized in that: The invention also comprises a slag collecting assembly, the slag collecting assembly comprising a slag collecting box (70), a slag collecting bucket (71) and a telescopic slag discharge pipe (72), the slag collecting box (70) being arranged on the frame (1), the slag collecting bucket (71) being arranged at the bottom of the baffle (61), and having an opening penetrating the baffle (61) at the top thereof, the telescopic slag discharge pipe (72) being arranged inside the telescopic drill rod (20), and having a top end and a bottom end thereof being respectively connected to the slag collecting box (70) and the slag collecting bucket (71).

7. A method for exploiting geothermal energy, which is based on the exploitation equipment for exploiting geothermal energy according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: S1, equipment deployment, deploying the mining equipment to the corresponding geothermal wellhead, and ensuring that the frame (1) is stable so that the telescopic drill rod (20) and the mining drill bit (21) are vertically aligned with the wellhead; S2, start the machine, start the driving device (200) and the telescopic drill rod (20), the driving device (200) drives the mining drill bit (21) to rotate through the driving shaft (201), and the telescopic drill rod (20) is extended accordingly, so as to start the drilling work of the geothermal well; S3, cleaning the well wall. As the mining drill bit (21) rotates, the driving device (200) drives the scraper assembly to rotate through the transmission assembly. The vertical plate (310) and the scraper (311) on the scraper assembly scrape and clean the well wall to keep the well wall unobstructed; S4, slag collection. During the mining process, the slag scraped off by the scraper assembly during rotation falls on the baffle (61) and enters the slag collecting bucket (71) through the opening at the bottom of the baffle (61). At the same time, the scraper assembly rotates and cooperates with the pushing mechanism to push the cleaning mechanism (5) to clean the slag attached to the surface of the scraper assembly. The cleaned slag also falls on the baffle (61) and enters the slag collecting bucket (71) through the opening. The slag in the slag collecting bucket (71) is transported to the slag collecting box (70) through the telescopic slag discharge pipe (72) to complete the slag collection. S5, monitoring the mining process, during the entire mining process, real-time monitoring of underground temperature, pressure and other parameters, adjusting the rotation speed of the driving device (200) and the cleaning intensity of the scraper assembly according to actual conditions, so as to ensure the efficiency and safety of the mining process; S6. After the mining is finished and the drilling to the predetermined depth is completed, the operation of the driving device (200) and the telescopic drill rod (20) is stopped, and the telescopic drill rod (20) is gradually retracted to lift the mining drill bit (21) out of the well.

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