A coring device for drilling

Abstract

The utility model relates to geological exploration equipment technical field provides a kind of drilling coring device, including frame, rotating gear, motor, iron cable, extension casing, connecting device and roller bit etc., frame installs motor and drives rotating gear by driving gear, rotating gear drives lower extension casing rotation by iron cable, extension casing inside is linked with growth pipe by detachable connecting device, growth pipe lower end connects roller bit, extension casing lower end connects cutting pipe, and the synchronous crushing drilling of inside and outside layer or the independent coring of outside layer is realized by the dismounting of control connecting device.The utility model passes through the flexible transmission of iron cable and combines double-layer pipe body switching structure, solves the problem that single equipment is difficult to take into account efficient drilling and complete coring, has the advantages such as operation flexible, efficient, complete coring and structure stable.

Description

Technical Field

[0001] This utility model relates to the field of geological exploration equipment technology, and in particular to a drilling and coring device. Background Technology

[0002] In the process of geological resource exploration and mineral development, drilling is the most direct and crucial means of obtaining information about underground rock strata. It requires using drilling rigs to drive drilling tools to drill deep underground and break rocks into powder and fragments to form wellbores. As the exploration depth increases and the requirements for the accuracy of geological structure research improve, simple fracturing drilling can no longer meet the needs of comprehensive analysis of the physical properties of rock strata.

[0003] To obtain more detailed geological data, workers need to extract complete cylindrical rock core samples at specific depths. However, existing conventional drilling equipment mostly adopts a single-function structural design, that is, the full-face drill bit used to break rocks and the core extraction drill bit used to extract rock cores are independent of each other. This means that in actual operations, if it is necessary to switch between drilling and core extraction in the same borehole, the operator must lift the entire drill string downhole to the surface to replace the end actuator.

[0004] This frequent drilling operation not only greatly increases auxiliary operation time and seriously reduces overall construction efficiency, but also poses risks of wellbore collapse and wear at equipment connections in deep well environments due to frequent drill pipe disassembly and assembly. In addition, existing drilling equipment lacks a mechanism that can flexibly switch power transmission modes at deep formations, making it difficult to achieve both efficient rock breaking and slag removal and precise independent coring operations without changing drill bits. This fails to meet the urgent needs of modern geological exploration for high efficiency and multi-functional integration.

[0005] Therefore, this utility model proposes a drilling and coring device to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems existing in the drilling and coring equipment, such as the inability to flexibly switch between rock crushing and core extraction functions in deep well operation environments, the need for frequent tripping of drill strings to change the end effector, resulting in long auxiliary operation time, low construction efficiency, and easy risk of wellbore collapse, this utility model aims to provide a drilling and coring equipment with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a drilling and coring device, including: a frame, a rotating gear, a motor, a driving gear, a hydraulic cylinder, a pressing surface, an iron cable, a cutting tube, an extension sleeve, a connecting surface, an extension tube, a connecting column, a roller cone drill, a pumping pipe, a mounting surface, a spiral water pump, ball bearings, screws, a connecting device, a reinforcing column, and an extension tube.

[0008] The mounting surface is fixedly connected to the side wall of the frame, the motor is fixedly mounted on the mounting surface, the output end of the motor is fixedly connected to the drive gear, the drive gear meshes with the rotating gear, and the motor drives the drive gear to drive the large-diameter rotating gear to perform circular motion on the top of the frame, providing initial rotational power for the entire device.

[0009] Furthermore, the rotating gear is rotatably mounted on the upper part of the frame, and the lower end of the iron cable is fixedly connected to the upper surface of the rotating gear. The upper end of the iron cable is fixedly connected to the connecting surface, and the connecting surface is fixedly connected to the outer wall of the extension sleeve by the screw. The rotational torque at the top is transmitted to the lower sleeve structure through the flexible iron cable. The lower end of the extension sleeve is threadedly connected to the cutting tube, and the inner wall of the extension sleeve is fixedly connected to the outer ring of the connecting device by the screw. The inner ring of the connecting device is sleeved on the upper end of the growth tube. The detachable connecting device realizes the power linkage control of the inner and outer tubes. The lower end of the growth tube is threadedly connected to the upper end of the connecting column, and the lower end of the connecting column is fixedly connected to the roller cone drill. The upper inner side of the frame is fixedly connected to the hydraulic cylinder, and the output end of the hydraulic cylinder is fixedly connected to the extrusion surface. The extrusion surface is set facing the outer wall of the extension sleeve for stable clamping of the drill bit during pipe connection operation.

[0010] Preferably, a reinforcing column is provided between the connecting column and the growth tube. The two ends of the reinforcing column are threaded to the opening in the middle of the connecting column and the opening in the middle of the growth tube, respectively. Multiple reinforcing columns form a triangular structure between the growth tube and the connecting column. This triangular support system constructed by the reinforcing columns can effectively enhance the bending resistance and structural stability of the internal slender tube.

[0011] Preferably, the water pumping pipe is installed inside the triangular structure formed by the reinforcing column, and the upper end of the water pumping pipe is threaded to the extension pipe. The spiral water pump is installed inside the water pumping pipe and the extension pipe. The structural design makes full use of the internal space. The mud mixed with rock cuttings at the bottom of the well is discharged in real time through the water pumping pipe by the follow-up spiral water pump, which ensures the continuity of deep hole drilling.

[0012] Preferably, there are two extrusion surfaces, with the arcuate portions of the two extrusion surfaces facing each other. The hydraulic cylinder is fixedly connected to the side of the extrusion surface away from the arcuate portion. The opposing arcuate extrusion surfaces can better fit the circular pipe wall, providing a uniform and strong clamping force to prevent the drill rod from slipping or falling during the connection and disconnection process.

[0013] Preferably, the inner ring of the rotating gear is installed on the outer side of the upper ring of the frame, and the ball is installed in the gap between the rotating gear and the frame. The rolling friction contact achieved by the ball greatly reduces the mechanical wear and energy loss between the rotating components and improves the transmission efficiency.

[0014] Preferably, an arc-shaped handle is provided on the connecting surface, the upper end of the iron cable is connected to the arc-shaped handle on the connecting surface by welding, and the lower end of the iron cable is connected to the upper end of the rotating gear by welding. The welding connection method ensures the structural strength and reliability of the connection point under conditions of high torque and tension.

[0015] Preferably, a through hole is formed inside the connecting column and a through hole is formed on the roller cone drill. The through hole inside the connecting column and the through hole on the roller cone drill are aligned with each other to ensure that the externally injected cooling water can smoothly pass through the internal pipeline to the bottom of the drill bit, thus playing a dual role in cooling the drill bit and flushing away rock powder.

[0016] Preferably, the connecting device includes an outer ring and an inner ring. The outer ring of the connecting device is fitted with the inner ring of the extension sleeve, and the inner ring of the connecting device is fitted with the outer wall of the upper end of the growth tube. The structure realizes the effective transmission of torque between the inner and outer tubes, and the on / off control of the power flow can be realized through disassembly and assembly.

[0017] This utility model has the following beneficial effects: 1. This utility model solves the problem in the prior art that a single drilling device is difficult to flexibly switch between rock breaking drilling and complete core extraction modes by setting a detachable connection device between the extension casing and the growth tube. It achieves the effect of significantly improving the efficiency of geological exploration by selecting synchronous rotation of inner and outer layers for efficient drilling or independent core extraction of only the outer layer, depending on the stage of operation.

[0018] 2. This utility model solves the problem that slender drill pipes are prone to bending deformation or insufficient torsional stiffness in deep well operations due to uneven stress by setting reinforcing columns at the inner pipe connections and forming a triangular support structure. It achieves the effect of effectively dispersing lateral stress by utilizing the stability of the triangle and greatly enhancing the strength and stability of the core pipe system structure inside the device.

[0019] 3. This utility model solves the problem in the prior art that it is difficult to remove the rock and stone debris at the bottom of the well during deep hole drilling, which leads to stuck drill bit or severe overheating and wear of the drill bit. It can achieve the effect of pumping mud mixed with rock and stone out of the ground in real time according to the depth of the drill bit to ensure smooth drilling and extend the service life of the equipment. Attached Figure Description

[0020] Figure 1 This is a perspective view of a drilling and coring device proposed in this utility model; Figure 2 This is a cross-sectional view of the cutting tube in a core drilling device proposed in this utility model; Figure 3 This is a split view of the frame in a core drilling device proposed in this utility model; Figure 4 This is an exploded view of the roller cone drill in a core drilling device proposed in this utility model.

[0021] Legend: 1. Frame; 2. Rotary gear; 3. Motor; 4. Drive gear; 5. Hydraulic cylinder; 6. Extrusion surface; 7. Iron cable; 8. Cutting tube; 9. Extension sleeve; 10. Connecting surface; 11. Extension tube; 12. Connecting column; 13. Rotary drill; 14. Pumping pipe; 15. Mounting surface; 16. Spiral water pump; 17. Ball bearing; 18. Screw; 19. Connecting device; 20. Reinforcing column; 21. Extension tube. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Example:

[0023] Please refer to Figures 1 to 4 This utility model provides a drilling core sampling device, which aims to solve the structural defects of existing geological exploration equipment in deep drilling, which makes it difficult to simultaneously handle rock breaking drilling, debris removal, and complete core extraction. Figure 1 and Figure 2As shown, the drilling and coring device includes a frame 1 and a rotating gear 2 rotatably mounted on the upper part of the frame 1. The frame 1 serves as a support base for the entire device and provides installation positions for various functional components. The rotating gear 2 receives and transmits rotational power to drive the drilling tool assembly below to operate. A mounting surface 15 is fixedly connected to the side wall of the frame 1. The mounting surface 15 carries the power source. A motor 3 is fixedly mounted on the upper surface of the mounting surface 15. The motor 3 serves as the main power output mechanism for the entire device. A drive gear 4 is fixedly connected to the output shaft end of the motor 3. The drive gear 4 meshes with the rotating gear 2 for transmission. The motor 3 drives the drive gear 4 to rotate, thereby driving the large-diameter rotating gear 2 to perform circumferential motion on the top of the frame 1. The inner ring of the rotating gear 2 is mounted on the outer side of the upper ring of the frame 1. A ball bearing 17 is installed in the gap between the rotating gear 2 and the frame 1. The ball bearing 17 is used to reduce the frictional resistance between the rotating gear 2 and the frame 1 and to ensure the smoothness of the rotation process.

[0024] A steel cable 7 is fixedly connected to the upper surface of the rotating gear 2. The steel cable 7 serves as a flexible transmission medium to transmit the rotational torque at the top to the drilling pipe below. A connecting surface 10 is fixedly connected to the end of the steel cable 7 furthest from the rotating gear 2. The connecting surface 10 connects to and seals the top opening of the lower pipe. An extension sleeve 9 is fixedly connected to the connecting surface 10 by screws 18. The extension sleeve 9 serves as an outer pipe structure to transmit torque and protect internal components. An arc-shaped handle is provided on the connecting surface 10. The upper end of the steel cable 7 is welded to the arc-shaped handle of the connecting surface 10, and the lower end of the steel cable 7 is welded to the upper end of the rotating gear 2. The connection of cable 7 enables rotational linkage between the rotating gear 2 and the extension casing 9, while allowing for a certain degree of flexible buffering during drilling. The extension casing 9 is equipped with a connecting device 19 and a growth tube 21. The connecting device 19 is used to control the power transmission state between the outer extension casing 9 and the inner growth tube 21. The growth tube 21 serves as the inner spindle for connecting the bottom drill bit assembly. The outer ring of the connecting device 19 is fixedly connected to the inner wall of the extension casing 9 by screws 18. The inner ring of the connecting device 19 is fitted onto the upper end of the growth tube 21. The locking action of the connecting device 19 allows the growth tube 21 to rotate synchronously with the extension casing 9.

[0025] To solve the technical problems of inner and outer casing fit and drill string extension fixation in deep drilling and coring operations, the core of the technical solution of this embodiment is that it also includes a drilling execution component at the bottom and a hydraulic fixing component at the top. Furthermore, the drilling execution component forms a specific inner and outer casing fit and connection relationship with the aforementioned extension casing 9 and growth tube 21, and the hydraulic fixing component forms a stable support fit relationship with the frame 1.

[0026] Please refer to Figure 2 and Figure 4The lower end of the extension casing 9 is threadedly connected to a cutting tube 8, which serves as an outer cutting mechanism for rotary cutting cylindrical rock cores in core sampling mode. The lower end of the growth tube 21 is threadedly connected to the upper end of the connecting post 12. The lower end of the connecting post 12 is fixedly connected to a roller cone drill 13, which serves as an inner crushing mechanism for grinding rocks in drilling mode. The connecting post 12 has a through hole inside, and the roller cone drill 13 has a through hole on its surface. The through hole inside the connecting post 12 and the through hole on the roller cone drill 13 are aligned with each other. This through hole alignment structure ensures that the water flow can reach the bottom of the drill bit for cooling and flushing during drilling. The connecting device 19 includes an outer ring and an inner ring. The outer ring of the connecting device 19 is fitted with the inner ring of the extension casing 9, and the inner ring of the connecting device 19 is fitted with the upper outer wall of the growth tube 21. The connecting device 19 locks the outer extension casing 9 and the inner growth tube 21 together to achieve synchronous rotation, or the connecting device 19 can be removed to achieve dynamic separation of the inner and outer layers.

[0027] Meanwhile, to prevent slippage of the drill bit during connection or disassembly, a hydraulic cylinder 5 is fixedly connected to the inner wall of the upper end of the frame 1. The hydraulic cylinder 5 serves as a clamping power source to provide lateral thrust. A pressing surface 6 is fixedly connected to the output end of the hydraulic cylinder 5. The pressing surface 6 is used to directly contact the pipe wall to generate frictional resistance. There are two pressing surfaces 6, which are arranged opposite each other at their arc-shaped points. This arc-shaped structure can tightly fit the outer circumferential surface of the extension sleeve 9. The hydraulic cylinder 5 is fixedly connected to the side of the pressing surface 6 away from the arc-shaped point. When the device needs to be fixed, the hydraulic cylinder 5 pushes the pressing surface 6 towards the center to clamp the extension sleeve 9, ensuring the stability and safety of the device when the extension sleeve 9 is connected.

[0028] As a preferred embodiment, in order to further improve the structural strength and torsional resistance of the drill pipe assembly inside the device, a reinforcing column 20 is provided between the connecting column 12 and the growth tube 21. The two ends of the reinforcing column 20 are threaded to the opening in the middle of the connecting column 12 and the opening in the middle of the growth tube 21, respectively. Multiple reinforcing columns 20 form a triangular structure between the growth tube 21 and the connecting column 12. This triangular structure formed by the reinforcing columns 20 can effectively disperse the lateral stress generated during drilling and prevent the internal pipe components from deforming.

[0029] As another preferred embodiment, in order to realize the real-time slag removal function in deep well operations and prevent gravel from clogging the borehole, a water pumping pipe 14 is installed inside the triangular structure formed by the reinforcing column 20. An extension pipe 11 is threaded to the upper end of the water pumping pipe 14. A spiral water pump 16 is installed inside the water pumping pipe 14 and the extension pipe 11. The spiral water pump 16 can descend synchronously with the roller cone drill 13 and pump the mud water mixed with stones through the water pumping pipe 14 and the extension pipe 11 to the ground. The water pumping pipe 14, the extension pipe 11 and the spiral water pump 16 can be flexibly disassembled and used according to different actual conditions.

[0030] As another preferred embodiment, to ensure the reliability of torque transmission by addressing the connection details of the flexible transmission components, an arc-shaped handle is provided on the connection surface 10. The upper end of the iron cable 7 is connected to the arc-shaped handle on the connection surface 10 by welding, and the lower end of the iron cable 7 is fixedly connected to the upper end of the rotating gear 2 by welding. This welding and fixing method ensures the firmness of the connection point during high torque transmission. The design of the arc-shaped handle helps to disperse the tension on the iron cable 7 and optimize the force distribution.

[0031] As another preferred embodiment, in order to reduce mechanical transmission loss and ensure the cooling effect of the drill bit, the inner ring of the rotating gear 2 is installed on the outer side of the upper ring of the frame 1, and the ball bearing 17 is installed in the gap between the rotating gear 2 and the frame 1. The ball bearing 17 is used to achieve rolling friction contact to reduce rotational resistance. In addition, a through hole is opened inside the connecting column 12 and a through hole is opened on the roller cone drill 13. The through hole inside the connecting column 12 and the through hole on the roller cone drill 13 are aligned with each other to ensure that the externally injected water can pass smoothly through the internal pipe and continuously inject water to cool the bottom grinding surface.

[0032] Working principle: When in use, the motor 3 is started to drive the gear 4 to rotate, which in turn drives the rotating gear 2 to rotate. The rotation direction of the rotating gear 2 is the same as that of the extension sleeve 9 and the cutting tube 8. The rotating gear 2 drives the extension sleeve 9 to rotate through the iron cable 7. At this time, the connecting device 19 is installed inside the extension sleeve 9 and sleeved on the growth tube 21. The connecting device 19 drives the growth tube 21 to rotate synchronously with the extension sleeve 9. The roller cone drill 13 grinds the underground rock by its own weight and rotation. Water is continuously injected into the grinding surface through the hole at the bottom of the roller cone drill 13. The water flow cools the device and pushes the crushed stones to the top. The spiral water pump 16 pumps the water mixed with stones out of the ground, so as not to affect the normal operation of the device. When the device is excavated to a certain depth and a pipe connection is needed, the hydraulic cylinder 5 is activated to push the extrusion surface 6. The extrusion surface 6 presses and fixes the extension sleeve 9 so that the device will not move up and down. At this time, the extension sleeve 9, the extension pipe 11, and the growth pipe 21 are reinstalled. The connecting surface 10 and the connecting device 19 are removed and installed on the newly added extension sleeve 9, and the excavation operation is carried out again. When the appropriate depth is reached and core sampling is required, the connecting device 19 is removed. At this time, the power transmission between the extension sleeve 9 and the growth tube 21 is disconnected, the roller cone drill 13 stops rotating, and the cutting tube 8 continues to work alone to cut a cylindrical rock core downwards. Due to the vibration generated by the device, the rock core will break inside the cutting tube 8 or at the cutting point. The rock core will get stuck in the tube due to friction with the inside of the cutting tube 8. Finally, the device is pulled out of the ground to complete the drilling and core sampling work.

Claims

1. A drilling and coring device, comprising a frame (1), a rotating gear (2), a motor (3), a driving gear (4), a hydraulic cylinder (5), a pressing surface (6), an iron cable (7), a cutting tube (8), an extension sleeve (9), a connecting surface (10), an extension tube (11), a connecting column (12), a roller cone drill (13), a water pumping pipe (14), a mounting surface (15), a spiral water pump (16), a ball bearing (17), a screw (18), a connecting device (19), a reinforcing column (20), and an extension tube (21); the mounting surface (15) is fixedly connected to the side wall of the frame (1), the motor (3) is fixedly mounted on the mounting surface (15), the output end of the motor (3) is fixedly connected to the driving gear (4), and the driving gear (4) meshes with the rotating gear (2); characterized in that, The rotating gear (2) is rotatably mounted on the upper part of the frame (1); the upper surface of the rotating gear (2) is fixedly connected to the lower end of the iron cable (7), the upper end of the iron cable (7) is fixedly connected to the connecting surface (10), the connecting surface (10) is fixedly connected to the outer wall of the extension sleeve (9) by the screw (18); the lower end of the extension sleeve (9) is threadedly connected to the cutting tube (8); the inner wall of the extension sleeve (9) is fixedly connected to the outer ring of the connecting device (19) by the screw (18), the inner ring of the connecting device (19) is sleeved on the upper end of the growth tube (21); the lower end of the growth tube (21) is threadedly connected to the upper end of the connecting column (12), the lower end of the connecting column (12) is fixedly connected to the roller cone drill (13); the upper inner side of the frame (1) is fixedly connected to the hydraulic cylinder (5), the output end of the hydraulic cylinder (5) is fixedly connected to the extrusion surface (6), the extrusion surface (6) is set facing the outer wall of the extension sleeve (9).

2. The drilling and coring device according to claim 1, characterized in that, A reinforcing column (20) is provided between the connecting column (12) and the growth tube (21). The two ends of the reinforcing column (20) are threaded to the opening in the middle of the connecting column (12) and the opening in the middle of the growth tube (21), respectively. Multiple reinforcing columns (20) form a triangular structure between the growth tube (21) and the connecting column (12).

3. The drilling and coring device according to claim 2, characterized in that, The water pump (14) is installed inside the triangular structure formed by the reinforcing column (20). The upper end of the water pump (14) is threaded to the extension pipe (11). The spiral water pump (16) is installed inside the water pump (14) and the extension pipe (11).

4. The drilling and coring device according to claim 1, characterized in that, The extrusion surface (6) is provided in two parts, with the arc-shaped parts of the two extrusion surfaces (6) facing each other, and the hydraulic cylinder (5) is fixedly connected to the side of the extrusion surface (6) away from the arc-shaped part.

5. A drilling and coring device according to claim 1, characterized in that, The inner ring of the rotating gear (2) is installed on the outer side of the upper ring of the frame (1), and the ball (17) is installed in the gap between the rotating gear (2) and the frame (1).

6. A drilling and coring device according to claim 1, characterized in that, An arc-shaped handle is provided on the connecting surface (10). The upper end of the iron cable (7) is connected to the arc-shaped handle of the connecting surface (10) by welding. The lower end of the iron cable (7) is connected to the upper end of the rotating gear (2) by welding.

7. A drilling and coring device according to claim 1, characterized in that, The connecting post (12) has a through hole inside, and the roller cone drill (13) has a through hole on it. The through hole inside the connecting post (12) and the through hole on the roller cone drill (13) are aligned with each other.

8. A drilling and coring device according to claim 1, characterized in that, The connecting device (19) includes an outer ring and an inner ring. The outer ring of the connecting device (19) is fitted with the inner ring of the extension sleeve (9), and the inner ring of the connecting device (19) is fitted with the upper outer wall of the growth tube (21).

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