Drill jamming prevention coreless drilling device for water source 2000 drilling machine

Through the combination of track transmission and high-frequency vibration mechanism, the problem of drilling in the water source 2000 drilling rig during the surface drilling stage is solved, efficient and safe drilling operations are achieved, and the passing and stability of the device in complex terrain is improved.

CN120273627APending Publication Date: 2025-07-08SHAANXI XINXIN YUANFEI EXPLORATION CO LTD
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Patent Information

Application Number
CN202510614724.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-13
Publication Date
2025-07-08

AI Technical Summary

Technical Problem

In the early stage of the surface drilling stage of the existing water source 2000 drilling rig, gravel is easily embedded in key parts of the drilling device, causing drilling to be stuck, relying on manpower to remove the card time and effort, affecting efficiency and safety.

Method used

The moving mechanism and high-frequency vibration mechanism designed with a crawler transmission are adopted. The crawler increases the contact area and reduces the pressure. The vibrating mechanism quickly releases the drill by combining the drive motor and the turntable. The limit groove and connection block ensure the accurate vibration direction, and the guide system ensures the vertical and stable drill bit.

Benefits of technology

It improves the efficiency and safety of drilling operations, reduces drilling time and labor costs, and enhances the passability and reliability of the device in harsh environments.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the related technical field of drilling equipment, in particular to a drill jamming prevention coreless drilling device for a water source 2000 drilling machine. The drill jamming prevention coreless drilling device comprises a shell, a fixing base is fixedly connected to the surface of one side of the shell, a fixing rod is slidably connected to the surface of one side of the fixing base, and a connecting plate is fixedly connected to the surface of the upper portion of the shell. According to the anti-jamming coreless drilling device for the water source 2000 drilling machine, due to the arrangement of the vibration mechanism, the jamming relieving time and labor cost are effectively reduced, due to the combination of a driving motor and a rotating disc, electric energy can be quickly converted into mechanical vibration, the starting response time is short, quick intervention can be achieved when a drill bit is just jammed, crisis is relieved through high-frequency vibration, and the drilling efficiency is improved. The emergency processing capacity of drilling operation is greatly improved, the vibration piece is matched with a limiting structure of a limiting groove and a connecting block, the excessive displacement of components caused by vibration is effectively reduced while stable vibration output is guaranteed, and the reliability and durability of the mechanism are enhanced.
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Description

Technical Field

[0001] The present invention relates to the technical field of drilling equipment, and particularly to a coreless drilling device for a water source 2000 drill rig that prevents drill sticking. Background Art

[0002] In the technical field of drilling equipment, the water source 2000 drill rig is a drilling equipment with excellent performance and wide application. It adopts advanced mechanical design and power transmission systems, has powerful drilling capabilities and stability, can adapt to various complex geological conditions, and can carry out efficient drilling operations in different strata. Its equipped high-precision control system can accurately control key parameters such as drilling speed and pressure to ensure the accuracy and reliability of the drilling process. At the same time, the drill rig also has a good operation interface and user-friendly design, which is convenient for operators to operate and maintain, greatly improving work efficiency. In addition, it has excellent performance in the field of water source exploration, providing strong technical support for finding rich and high-quality underground water resources. Therefore, there is a particular need for a coreless drilling device for a water source 2000 drill rig that prevents drill sticking.

[0003] However, for an existing coreless drilling device for a water source 2000 drill rig that prevents drill sticking, during the initial surface layer drilling stage, it still faces severe challenges. The surface soil layer often contains gravel of various shapes and hardness levels. These gravels are like hidden "traps" that can easily embed into key parts of the drilling device, causing the drill bit to get stuck. Once drill sticking occurs, relying solely on manual assistance to release the stuck drill not only requires a large amount of time and physical effort but also places a heavy burden on the staff, and may even pose safety hazards due to high-intensity operations, greatly affecting the efficiency and safety of the drilling operation. Summary of the Invention

[0004] The purpose of the present invention is to provide a coreless drilling device for a water source 2000 drill rig that prevents drill sticking, so as to solve the problems raised in the above background art, that is, during the initial surface layer drilling stage, it still faces severe challenges. The surface soil layer often contains gravel of various shapes and hardness levels. These gravels are like hidden "traps" that can easily embed into key parts of the drilling device, causing the drill bit to get stuck. Once drill sticking occurs, relying solely on manual assistance to release the stuck drill not only requires a large amount of time and physical effort but also places a heavy burden on the staff, and may even pose safety hazards due to high-intensity operations, greatly affecting the efficiency and safety of the drilling operation.

[0005] To achieve the above object, the present invention provides the following technical solution: a coreless drilling device for anti-sticking drilling of a water source 2000 drill, including a housing. One surface of the housing is fixedly connected with a fixed base. One surface of the fixed base is slidably connected with a fixed rod. The upper surface of the housing is fixedly connected with a connecting plate. The upper surface of the connecting plate is fixedly connected with a support device. One surface of the support device is fixedly connected with a hydraulic device. One surface of the hydraulic device is slidably connected with a moving part. One surface of the moving part is fixedly connected with a connecting head. The outer surface of the connecting head is slidably connected with a coreless drill bit. One surface of the connecting head is fixedly connected with a pipeline. One surface of the connecting plate is provided with a moving mechanism, and one surface of the connecting plate is provided with a vibration mechanism;

[0006] The vibration mechanism includes a collar. The collar is slidably connected to one surface of the connecting plate. One surface of the collar is provided with an activity hole. The lower surface of the collar is fixedly connected with a vibration part. One surface of the vibration part is provided with a limiting groove. The inner surface of the collar is slidably connected with a turntable. One surface of the turntable is fixedly connected with a driving motor. The vibration part is slidably connected with a connecting column. One surface of the connecting block is fixedly connected with a guiding block. One surface of the guiding block is provided with a guiding hole. One surface of the connecting block is slidably connected with a fixing part.

[0007] Preferably, there are four fixed bases and fixed rods with the same size, and they are symmetrically distributed along the housing.

[0008] Preferably, the height of the activity hole is the same as the diameter of the turntable, and the collar and the turntable are parallelly distributed.

[0009] Preferably, the connecting block is rectangular in design. The outer wall size of the connecting block matches the inner wall size of the limiting groove, and the connecting block and the limiting groove are parallelly distributed.

[0010] Preferably, there are two fixing parts with the same size. The inner wall size of the guiding hole matches the outer wall size of the coreless drill bit.

[0011] Preferably, the moving mechanism includes a guiding rod. The guiding rod is fixedly connected to one surface of the connecting plate. The lower surface of the guiding rod is fixedly connected with a support seat. The upper surface of the support seat is fixedly connected with a strong spring. One surface of the support seat is penetrated and connected with a connecting rod. One surface of the connecting rod is fixedly connected with a rotating shaft. The outer surface of the rotating shaft is slidably connected with a crawler. One surface of the rotating shaft is penetrated and connected with a driving rod. One surface of the driving rod is fixedly connected with a double-headed motor.

[0012] Preferably, there are two groups of rotating shafts with the same size, and each group has three, and they are symmetrically distributed along the horizontal center line of the housing.

[0013] Preferably, four identical strong springs are provided, and two identical connecting rods are provided and are distributed in parallel.

[0014] Preferably, two tracks of the same size are provided and are symmetrically distributed along the horizontal center line of the connecting rod, and two identical driving rods are provided and are symmetrically distributed along the horizontal center line of the double-headed motor.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: for this anti-sticking coreless drilling device for a water source 2000 drill rig, 1. Through the setting of the moving mechanism, its crawler drive design increases the contact area with the ground compared with the traditional wheeled moving method, reduces the pressure per unit area, can easily cope with soft ground such as swamps and mud, and greatly improves the passability of the drill rig in harsh environments; the dual-power output mode of the double-headed motor can flexibly adjust the speed and torque according to the terrain conditions, realizing low-speed high-torque climbing or high-speed stable movement, meeting diverse traveling needs, significantly improving the operation efficiency. The elastic buffer system composed of the strong spring and the support seat can not only dampen vibrations but also adaptively adjust the pressure between the crawler and the ground, extending the service life of the crawler and providing a solid guarantee for the continuous and efficient operation of the water source 2000 drill rig.

[0016] 2. Through the setting of the vibration mechanism, the time and labor costs for releasing jams are effectively reduced. The combination of the drive motor and the turntable can quickly convert electrical energy into mechanical vibrations, with a short start-up response time. It can intervene quickly when the drill bit just gets stuck and resolve the crisis with high-frequency vibrations, greatly improving the emergency handling ability of the drilling operation. The vibration parts cooperate with the limiting structure of the limiting groove and the connecting block, effectively reducing the excessive displacement of the components due to vibrations while ensuring the stable output of vibrations, enhancing the reliability and durability of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 is a schematic diagram of the coreless drill bit separation structure of the present invention;

[0019] Figure 3 is a schematic diagram of the side structure of the present invention;

[0020] Figure 4 is a schematic diagram of the structure of the moving mechanism of the present invention;

[0021] Figure 5 is a schematic diagram of the overall structure of the vibration mechanism of the present invention;

[0022] Figure 6 is a schematic diagram of the disassembled structure of the vibration mechanism of the present invention.

[0023] In the figure: 1. Outer shell; 2. Fixed base; 3. Fixed rod; 4. Armature plate; 5. Bracket device; 6. Hydraulic device; 7. Movable part; 8. Connector; 9. Coreless drill bit; 10. Pipe; 11. Moving mechanism; 1101. Guide rod; 1102. Strong spring; 1103. Support base; 1104. Connecting rod; 1105. Rotating shaft; 1106. Crawler; 1107. Driving rod; 1108. Double-headed motor; 12. Vibration mechanism; 1201. Ferrule; 1202. Movable hole; 1203. Vibration part; 1204. Limit groove; 1205. Turntable; 1206. Driving motor; 1207. Connecting block; 1208. Guide block; 1209. Guide hole; 1210. Fixed part. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figure 1-6 , the present invention provides a technical solution: a coreless drilling device for preventing drill sticking in a water source 2000 drill, including an outer shell 1, a fixed base 2 is fixedly connected to one side surface of the outer shell 1, a fixed rod 3 is slidably connected to one side surface of the fixed base 2, a ferrule 4 is fixedly connected to the upper surface of the outer shell 1, a bracket device 5 is fixedly connected to the upper surface of the ferrule 4, a hydraulic device 6 is fixedly connected to one side surface of the bracket device 5, a movable part 7 is slidably connected to one side surface of the hydraulic device 6, a connector 8 is fixedly connected to one side surface of the movable part 7, a coreless drill bit 9 is slidably connected to the outer surface of the connector 8, a pipe 10 is fixedly connected to one side surface of the connector 8, a moving mechanism 11 is arranged on one side surface of the ferrule 4, and a vibration mechanism 12 is arranged on one side surface of the ferrule 4;

[0026] The vibration mechanism 12 includes a ferrule 1201. The ferrule 1201 is slidably connected to one side surface of the armature plate 4. An activity hole 1202 is provided on one side surface of the ferrule 1201. A vibration member 1203 is fixedly connected to the lower surface of the ferrule 1201. A limiting groove 1204 is provided on one side surface of the vibration member 1203. A turntable 1205 is slidably connected to the inner surface of the ferrule 1201. A driving motor 1206 is fixedly connected to one side surface of the turntable 1205. A connecting column 1207 is slidably connected to the vibration member 1203. A guiding block 1208 is fixedly connected to one side surface of the connecting block 1207. A guiding hole 1209 is provided on one side surface of the guiding block 1208. A fixing member 1210 is slidably connected to one side surface of the connecting block 1207. Through the settings of the ferrule 1201, the activity hole 1202, the vibration member 1203, the limiting groove 1204, the turntable 1205, the driving motor 1206, the connecting block 1207, the guiding block 1208, the guiding hole 1209 and the fixing member 1210, when in use, when the coreless drill bit 9 is stuck, the driving motor 1206 is started, driving the turntable 1205 to rotate at a high speed inside the ferrule 1201. The generated force causes the ferrule 1201 to slide downward along the armature plate 4, and the vibration member 1203 fixed thereto moves downward synchronously. At this time, the limiting groove 1204 on the vibration member 1203 closely cooperates with the connecting block 1207 to ensure that the vibration direction is accurately controllable; the vibration member 1203 impacts the ground through high-frequency vibration, directly transmitting the vibration force to the surrounding of the drill bit, effectively loosening the crushed stones and soil stuck by the drill, breaking the deadlock. The guiding system composed of the guiding block 1208, the guiding hole 1209 and the fixing member 1210 not only ensures the stable operation of the components when the drill rig moves, but also provides support and guidance for the drill bit during the vibration operation, assisting the coreless drill bit 9 to exert force accurately, effectively reducing the time and labor costs for releasing the stuck situation, and reducing the work burden of the staff

[0027] Further, there are four fixing bases 2 and fixing rods 3 with the same size, and they are symmetrically distributed along the housing 1. Through the settings of the fixing bases 2 and the fixing rods 3, when in use, when reaching the predetermined position, the fixing base 2 extends the fixing rod 3 to make it contact the ground, increasing the grounding area. Through the setting of the four symmetric distributions, the device is more stable during operation and is not prone to deviation.

[0028] Further, the height of the activity hole 1202 is the same as the diameter of the turntable 1205, and the ferrule 1201 and the turntable 1205 are parallelly distributed. Through the settings of the activity hole 1202, the ferrule 1201 and the turntable 1205, when in use, when the turntable 1205 rotates inside the activity hole 1202, it drives the turntable 1205 to rise or fall, completing the vibration of the ground. The vibration frequency can be adjusted by adjusting the rotation speed of the turntable 1205.

[0029] Further, the connecting block 1207 is designed in a rectangular shape. The outer wall dimensions of the connecting block 1207 match the inner wall dimensions of the limiting groove 1204, and the connecting block and the limiting groove 1204 are distributed in parallel. Through the settings of the connecting block 1207 and the limiting groove 1204, during use, due to the characteristic that the rectangular connecting block 1207 matches the dimensions of the limiting groove 1204, it is tightly fitted into the limiting groove 1204, restricting the displacement of the vibrating member 1203 in the horizontal direction and only allowing it to perform vibration operations in the vertical direction. Through precise positioning, it ensures that the vibration direction always acts vertically on the sticking point, avoiding the dispersion of the vibration force and greatly improving the vibration efficiency.

[0030] Further, there are two fixing members 1210 with the same dimensions. The inner wall dimensions of the guiding hole 1209 match the outer wall dimensions of the coreless drill bit 9. Through the settings of the guiding hole 1209 and the coreless drill bit 9, during use, the guiding hole 1209 and the coreless drill bit 9 are precisely matched in dimensions, which can provide stable guiding support for the coreless drill bit 9 and ensure that it always remains vertical during the drilling process, effectively reducing the risk of sticking caused by the deviation of the drill bit.

[0031] Further, the moving mechanism 11 includes a guiding rod 1101. The guiding rod 1101 is fixedly connected to one side surface of the armature plate 4. A support seat 1103 is fixedly connected to the lower surface of the guiding rod 1101. A strong spring 1102 is fixedly connected to the upper surface of the support seat 1103. A connecting rod 1104 penetrates through one side surface of the support seat 1103. A rotating shaft 1105 is fixedly connected to one side surface of the connecting rod 1104. A crawler 1106 is slidably connected to the outer surface of the rotating shaft 1105. A driving rod 1107 penetrates through one side surface of the rotating shaft 1105. A double-headed motor 1108 is fixedly connected to one side surface of the driving rod 1107. Through the settings of the guiding rod 1101, the strong spring 1102, the support seat 1103, the connecting rod 1104, the rotating shaft 1105, the crawler 1106, the driving rod 1107 and the double-headed motor 1108, during use, after the double-headed motor 1108 is started, the driving rod 1107 drives the rotating shaft 1105 to rotate, making the crawler 1106 rotate cyclically, providing driving force for the drill rig to adapt to complex terrains. The guiding rod 1101 is fixed to the armature plate 4, playing a role of precise guiding to ensure that the drill rig moves along the predetermined trajectory; the strong spring 1102 and the support seat 1103 form a buffer system. When the drill rig encounters ground protrusions or depressions, the strong spring 1102 absorbs vibrations through compression or extension, making the crawler 1106 always closely adhere to the ground, enhancing the grip. The connecting rod 1104 stably connects the rotating shaft 1105, ensuring the tension and transmission stability of the crawler 1106. The crawler structure increases the contact area, reduces the ground pressure, and improves the ground passability.

[0032] Further, there are two sets of rotating shafts 1105 with the same size, each set having three, and they are symmetrically distributed along the horizontal center line of the housing 1. Through the setting of the rotating shafts 1105, the rotating shafts 1105 drive the crawlers 1106 to rotate during use. The setting of multiple rotating shafts 1105 effectively enhances the power transmission of the crawlers 1106.

[0033] Further, there are four identical strong springs 1102 and two identical connecting rods 1104, and they are distributed in parallel. Through the setting of the strong springs 1102, during use, the four identical strong springs 1102 are symmetrically distributed above the support base 1103. When the drill encounters terrain undulations or vibration impacts during travel, each spring is synchronously stressed and deforms, absorbing and dispersing the impact force through elastic expansion and contraction, which can effectively reduce the vibration impact of the drill on bumpy roads and protect the core components of the equipment.

[0034] Further, there are two crawlers 1106 with the same size, and they are symmetrically distributed along the horizontal center line of the connecting rod 1104. There are two identical drive rods 1107, and they are symmetrically distributed along the horizontal center line of the double-headed motor 1108. Through the setting of the double-headed motor 1108 and the drive rods 1107, during use, the double-headed motor 1108 drives the drive rods 1107 on both sides to rotate. The symmetrical distribution ensures the stability of power transmission, effectively avoiding equipment skew or jamming caused by uneven force on one side and ensuring the accuracy of the travel route.

[0035] Working principle: During the operation of the water source 2000 drill, the moving mechanism 11 and the vibration mechanism 12 complement each other to build an efficient and stable operation system. In the moving mechanism 11, the double-headed motor 1108 serves as the power source. After starting, it transmits power to the drive rod 1107 in an orderly manner. The drive rod 1107 then drives the rotating shaft 1105 to rotate at a high speed, driving the track 1106 to rotate cyclically, endowing the drill with the ability to move freely in complex terrains such as mountains and muddy lands. The guide rod 1101, like an accurate navigator, is firmly fixed to the connecting plate 4 to calibrate the trajectory of the traveling direction. The elastic buffer structure composed of the strong spring 1102 and the support seat 1103, like a sensitive shock absorber, senses the ground undulation in real time, absorbs vibrations through the deformation of the spring, ensures that the track 1106 is in close contact with the ground, and prevents slipping and instability. The stable connection between the connecting rod 1104 and the rotating shaft 1105 continuously ensures the tension state of the track 1106 and maintains efficient transmission. When the coreless drill bit 9 is accidentally stuck, the vibration mechanism 12 immediately responds, and the drive motor 1206 starts quickly, driving the turntable 1205 to rotate at a high speed inside the ferrule 1201. The centrifugal force generated causes the ferrule 1201 to slide downward along the connecting plate 4, and the vibration part 1203 fixed to it moves downward synchronously. At this time, the limit groove 1204 on the vibration part 1203 is closely matched with the connecting block 1207 to ensure that the vibration direction is accurately controllable. The vibration part 1203 impacts the ground through high-frequency vibrations, directly transmitting the vibration force to the surrounding of the drill bit, effectively loosening the crushed stones and soil stuck to the drill, breaking the deadlock of being stuck. The guiding system composed of the guiding block 1208, the guiding hole 1209, and the fixing part 1210 not only ensures the stable operation of the components during the movement of the drill, but also provides support and guidance for the drill bit during the vibration operation, assisting the coreless drill bit 9 to exert force accurately. In this way, the use process of an anti-stuck coreless drilling device for a water source 2000 drill is completed.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coreless drilling device for preventing drill sticking in a water source 2000 drill, comprising a housing (1), characterized in that: One side surface of the said housing (1) is fixedly connected with a fixed base (2). One side surface of the fixed base (2) is slidably connected with a fixed rod (3). The upper surface of the housing (1) is fixedly connected with an armature plate (4). The upper surface of the armature plate (4) is fixedly connected with a bracket device (5). One side surface of the bracket device (5) is fixedly connected with a hydraulic device (6). One side surface of the hydraulic device (6) is slidably connected with a moving part (7). One side surface of the moving part (7) is fixedly connected with a connecting head (8). The outer surface of the connecting head (8) is slidably connected with a coreless drill bit (9). One side surface of the connecting head (8) is fixedly connected with a pipeline (10). One side surface of the armature plate (4) is provided with a moving mechanism (11). One side surface of the armature plate (4) is provided with a vibration mechanism (12). The said vibration mechanism (12) includes a collar (1201). The collar (1201) is slidably connected to one side surface of the armature plate (4). One side surface of the collar (1201) is provided with an activity hole (1202). The lower surface of the collar (1201) is fixedly connected with a vibration part (1203). One side surface of the vibration part (1203) is provided with a limit groove (1204). The inner surface of the collar (1201) is slidably connected with a turntable (1205). One side surface of the turntable (1205) is fixedly connected with a driving motor (1206). The vibration part (1203) is slidably connected with a connecting column (1207). One side surface of the connecting block (1207) is fixedly connected with a guiding block (1208). One side surface of the guiding block (1208) is provided with a guiding hole (1209). One side surface of the connecting block (1207) is slidably connected with a fixing part (1210).

2. The non-core drilling device for preventing drill sticking of a 2000 water source drill rig according to claim 1, characterized in that: There are four fixed bases (2) and fixed rods (3) with the same size, and they are symmetrically distributed along the housing (1).

3. The non-core drilling device for preventing drill sticking of a 2000 water source drill rig according to claim 1, characterized in that: The height of the said activity hole (1202) is the same as the diameter of the turntable (1205), and the collar (1201) and the turntable (1205) are parallelly distributed.

4. The non-core drilling device for preventing drill sticking of a water source 2000 drill according to claim 1, characterized in that: The said connecting block (1207) is designed in a rectangular shape. The outer wall size of the connecting block (1207) matches the inner wall size of the limit groove (1204), and the connecting block and the limit groove (1204) are parallelly distributed.

5. A non-core drilling device for preventing drill sticking of a water source 2000 drilling rig according to claim 1, characterized in that: There are two fixing parts (1210) with the same size. The inner wall size of the guiding hole (1209) matches the outer wall size of the coreless drill bit (9).

6. A non-core drilling device for preventing drill sticking of a water source 2000 drill rig according to claim 1, characterized in that: The moving mechanism (11) includes a guide rod (1101), the guide rod (1101) is fixedly connected to one side surface of the armature plate (4), a support seat (1103) is fixedly connected to the lower surface of the guide rod (1101), a strong spring (1102) is fixedly connected to the upper surface of the support seat (1103), a connecting rod (1104) penetrates and is connected to one side surface of the support seat (1103), a rotating shaft (1105) is fixedly connected to one side surface of the connecting rod (1104), a crawler belt (1106) is slidably connected to the outer surface of the rotating shaft (1105), a driving rod (1107) penetrates and is connected to one side surface of the rotating shaft (1105), and a double-headed motor (1108) is fixedly connected to one side surface of the driving rod (1107).

7. A non-core drilling device for preventing drill sticking of a 2000 water source drill, characterized in that: Two sets of the rotating shafts (1105) with the same size are provided, three are provided in each set, and they are symmetrically distributed along the horizontal center line of the housing (1).

8. A coreless drilling device for preventing drill sticking of a 2000 water source drill, characterized in that: Four of the same strong springs (1102) are provided, two of the same connecting rods (1104) are provided, and they are distributed in parallel.

9. The anti-sticking coreless drilling device for a water source 2000 drill rig according to claim 6, characterized in that: Two of the same crawler belts (1106) are provided, and they are symmetrically distributed along the horizontal center line of the connecting rod (1104). Two of the same driving rods (1107) are provided, and they are symmetrically distributed along the horizontal center line of the double-headed motor (1108).