Drill bit assembly and drilling equipment

Abstract

The invention provides a drill bit assembly and drilling equipment. The drill bit assembly comprises a drill bit, a drill rod and a heat conduction piece. The drill rod is connected with the drill; the heat conduction piece comprises a first part and a second part which are connected with each other, and the first part is arranged in the drill rod and extends in the direction away from the joint face; the second part is arranged on the joint face of the drill rod and the drill bit, the second part is bent in the joint face, the heat exchange area of the heat conduction piece and the drill bit can be increased, and then the heat dissipation efficiency of the drill bit can be improved.

Description

Technical Field

[0001] The present application belongs to the field of exploration technology, and in particular relates to a drill bit assembly and drilling equipment. Background Art

[0002] In the field of geological exploration technology, drilling operations are a key step in obtaining underground resource information, conducting geological structure research, and resource exploitation. In this process, the drill bit is a tool that directly acts on rocks or soil, and its performance and stability are directly related to the efficiency and results of the drilling operation.

[0003] However, in the actual drilling process, the friction between the drill bit and the rock or soil will generate a lot of heat, causing the temperature of the drill bit to rise sharply. Especially in a near-vacuum environment such as the moon, the heat dissipation efficiency of the drill bit is lower, which greatly affects the normal operation of the drill bit.

[0004] Therefore, how to improve the heat dissipation capacity of the drill bit is a problem that those skilled in the art currently need to solve. Summary of the invention

[0005] The purpose of the present application is to provide a drill bit assembly and drilling equipment, aiming to solve the problem of insufficient heat dissipation capacity of the current drill bit.

[0006] A first aspect of an embodiment of the present application provides a drill bit assembly, comprising:

[0007] drill;

[0008] A drill rod connected to the drill bit;

[0009] The heat conducting member comprises a first part and a second part which are connected to each other, wherein the first part is arranged in the drill rod and extends in the direction away from the joint surface; the second part is arranged on the joint surface between the drill rod and the drill bit, and the second part is bent in the joint surface.

[0010] In some embodiments of the present application, the second portion is disposed around the boundary of the joint surface.

[0011] In some embodiments of the present application, there are multiple heat-conducting members, and the second portions of the multiple heat-conducting members are arranged at intervals along the boundary of the joint surface.

[0012] In some embodiments of the present application, the first portions of the plurality of heat conducting members are spaced apart along the circumference of the drill rod, and the first portions are extended along the length direction of the drill rod.

[0013] In some embodiments of the present application, a plurality of the heat conducting members are evenly spaced apart.

[0014] In some embodiments of the present application, the drill rod is a hollow structure, and the first portion is disposed within a side wall of the drill rod.

[0015] In some embodiments of the present application, the drill bit assembly further includes a heat-conducting layer, the heat-conducting layer is filled on the joint surface, and at least a portion of the heat-conducting layer is disposed on the same layer as the second portion.

[0016] In some embodiments of the present application, the heat conducting member is a tubular structure, and a coolant is disposed in the heat conducting member.

[0017] In some embodiments of the present application, the heat conducting member has an inner wall, a capillary structure is provided on the inner wall, and the capillary structure is used to condense the coolant.

[0018] In a second aspect, the present application also provides a drilling device, comprising the above-mentioned drill bit assembly.

[0019] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the above-mentioned drill bit assembly and drilling equipment, the drill bit assembly includes a drill bit, a drill rod and a heat conductor; the drill rod is connected to the drill bit; the heat conductor includes a first part and a second part that are connected to each other, the first part is arranged in the drill rod, and extends in a direction away from the joint surface; in the present application, by arranging the second part on the joint surface between the drill rod and the drill bit, and the second part is bent in the joint surface, it is beneficial to increase the heat exchange area between the heat conductor and the drill bit, and thus it is beneficial to improve the heat dissipation efficiency of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A structural schematic diagram of a drill bit assembly provided in one embodiment of the present application;

[0021] Figure 2 An embodiment of the present application provides Figure 1 Schematic diagram of the local A enlarged structure;

[0022] Figure 3 A structural schematic diagram of a drill bit assembly provided in one embodiment of the present application;

[0023] Figure 4 An embodiment of the present application provides Figure 3 AA section view;

[0024] Figure 5 An embodiment of the present application provides Figure 4 Schematic diagram of the local B enlarged structure;

[0025] Figure 6 A structural schematic diagram of a drill bit assembly provided in one embodiment of the present application;

[0026] Figure 7A structural schematic diagram of a drill bit assembly provided in one embodiment of the present application;

[0027] Figure 8 A structural schematic diagram of a drill bit assembly provided in one embodiment of the present application;

[0028] Fig. 9 A structural schematic diagram of a drill bit assembly provided in one embodiment of the present application;

[0029] Fig.10 A schematic diagram of the structure of a heat conducting member provided in one embodiment of the present application.

[0030] Specific element symbol description: 100-drill bit, 200-drill rod, 210-jointing surface, 300-heat conductive part, 310-second part, 320-first part, 330-capillary structure, 400-cooling liquid. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "up", "down", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] It is important to know that in the field of geological exploration and resource extraction, drilling operations play a vital role. It is not only the basic means of obtaining underground resource information and conducting geological structure research, but also a key step in the resource extraction process. The efficiency and results of drilling operations directly depend on the performance and stability of the drill bit. However, in the actual drilling process, the friction between the drill bit and the rock or soil will generate a lot of heat, causing the drill bit temperature to rise sharply, thus affecting its normal operation and service life.

[0036] Especially in extreme environments such as the moon, the challenges faced by drilling operations are even more severe. The near-vacuum environment on the lunar surface makes conventional heat dissipation methods, such as thermal convection and thermal radiation, almost ineffective. Since there is no atmosphere on the moon, it is impossible to dissipate heat through air convection, and the thermal radiation efficiency on the lunar surface is much lower than that of the earth's environment. Under such conditions, the heat dissipation of drilling equipment mainly depends on heat conduction, which often cannot meet the heat dissipation requirements during high-speed rotation and friction drilling. During the drilling process, the drill bit accumulates a lot of heat during high-speed rotation and friction, causing the drill bit to have to be frequently shut down for cooling. This not only seriously affects the drilling efficiency, but also increases the risk and cost of the mission.

[0037] Therefore, the present application improves the relevant drill bit assembly and drilling equipment based on this.

[0038] See also Figure 1 and Figure 2 , Figure 1 FIG. 1 shows a schematic structural diagram of a drill bit assembly provided in this embodiment. Figure 2 This embodiment provides Figure 1 The drill bit assembly of this embodiment includes a drill bit 100, a drill rod 200 and a heat conducting member 300, and the drill rod 200 is connected to the drill bit 100.

[0039] It should be explained that the drill bit 100 is a tool that directly acts on rock or soil, and the drill bit 100 undertakes key functions such as crushing and cutting. The drill rod 200 is a key component connecting the drill bit 100 and the main body of the drilling equipment, responsible for transmitting torque and axial force, and supporting the drill bit 100 for drilling operations. The length and diameter of the drill rod 200 need to be adjusted according to the drilling depth and operating conditions. The heat conductor 300 realizes efficient conduction and dissipation of heat inside the drill bit assembly. Exemplarily, the drill bit 100 and the drill rod 200 are threadedly connected.

[0040] Please add reference Figures 3 to 6 , Figure 3 FIG. 1 shows a schematic structural diagram of a drill bit assembly provided in this embodiment. Figure 4 This embodiment provides Figure 3 AA section view, Figure 5FIG. 2 shows a schematic diagram of a local B enlarged structure provided in this embodiment, Figure 6 A schematic structural diagram of the drill bit assembly provided in the present embodiment is shown; the heat conductor 300 of the present embodiment includes a first portion 320 and a second portion 310 connected to each other, the first portion 320 is arranged in the drill rod 200, and is extended in a direction away from the joint surface 210; the second portion 310 is arranged on the joint surface 210 of the drill rod 200 and the drill bit 100, and the second portion 310 is bent in the joint surface 210.

[0041] It can be understood that the second part 310 can more effectively capture and conduct the high heat generated by the drill bit 100 due to drilling friction, and at the same time, the bending structure is used to increase the heat dissipation area and improve the heat absorption efficiency of the second part 310. The first part 320 is arranged inside the drill rod 200 and extends in a direction away from the joint surface 210 of the drill rod 200 and the drill bit 100. The main function of this part of the heat conductor 300 is to conduct the heat absorbed by the second part 310 along a set path to a farther heat dissipation area or an external heat dissipation system.

[0042] In the related art, heat dissipation is only performed through air, which has extremely low heat dissipation efficiency. The drilling equipment needs to be shut down for over-temperature protection, which greatly reduces the drilling efficiency. However, in the present application, the heat dissipation of the drill bit 100 is performed by providing a heat conductor 300, which is beneficial to improving the heat dissipation efficiency. In the present application, the second part 310 is provided on the joint surface 210 between the drill rod 200 and the drill bit 100, and the second part 310 is bent in the joint surface 210, which is beneficial to improving the heat exchange area of ​​the heat conductor 300 and the drill bit 100, thereby improving the heat dissipation efficiency of the drill bit 100.

[0043] In some embodiments of this application, please continue to refer to Figure 2 and Figure 6 In this embodiment, the second portion 310 is disposed around the boundary of the joint surface 210. In this way, the second portion 310 can be disposed as long as possible, which is beneficial to increasing the heat exchange area between the second portion 310 and the drill bit 100, and further beneficial to improving the heat dissipation efficiency of the drill bit 100.

[0044] For example, if the joint surface 210 is a circular surface, the second portion 310 is an arc-shaped structure and is arranged along the boundary of the circular surface. If the joint surface 210 is a polygonal surface, the second portion 310 can be a linear structure and is arranged along only one edge of the joint surface 210, or the second portion 310 can be a polyline structure and can be arranged along multiple adjacent edges of the joint surface 210.

[0045] In some embodiments of this application, please continue to refer to Figure 2 and Figure 6In this embodiment, there are multiple heat conducting members 300 , and the second portions 310 of the multiple heat conducting members 300 are arranged at intervals along the boundary of the joint surface 210 .

[0046] It can be understood that providing a plurality of heat conductors 300 is beneficial to improving the heat dissipation efficiency of the drill bit 100 , and arranging the second portions 310 of the plurality of heat conductors 300 at intervals along the boundary of the joint surface 210 is beneficial to utilizing the boundary space to arrange more second portions 310 , so as to improve the heat dissipation efficiency of the drill bit 100 .

[0047] In some embodiments of this application, please refer to Figure 7 , Figure 7 The first parts 320 of the plurality of heat conducting members 300 of the embodiment are arranged at intervals along the circumference of the drill rod 200 , and the first parts 320 are extended along the length direction of the drill rod 200 .

[0048] It can be understood that the spacing between two adjacent first parts 320 is beneficial to leaving a heat dissipation space between the two first parts 320 and can also reduce the thermal interference between the two adjacent first parts 320 .

[0049] In some embodiments of this application, please continue to refer to Figure 7 In this embodiment, the plurality of heat conducting members 300 are evenly spaced, which is beneficial to ensure the heat uniformity on the drill rod 200 .

[0050] For example, please refer to Figure 7 , Figure 7 The number of the first parts 320 is 4 and they are evenly spaced around the center of the drill rod 200. The angle between two adjacent first parts 320 is 90°.

[0051] See also Figure 8 , Figure 8 A schematic structural diagram of a drill bit assembly provided in this embodiment is shown; Figure 8 The number of the first parts 320 is 6 and they are evenly spaced around the center of the drill rod 200. The angle between two adjacent first parts 320 is 60°.

[0052] See also Fig. 9 , Fig. 9 A schematic structural diagram of a drill bit assembly provided in this embodiment is shown; Figure 8 The number of the first parts 320 is 8 and they are evenly spaced around the center of the drill rod 200. The angle between two adjacent first parts 320 is 45°.

[0053] In some embodiments of this application, please continue to refer to Figure 4In this embodiment, the drill rod 200 is a hollow structure, and the first part 320 is arranged in the side wall of the drill rod 200. In this way, it is beneficial to reduce the occupied space of the first part 320, and the side wall of the drill rod 200 can also be used to protect the first part.

[0054] In some embodiments of the present application, the drill bit assembly further includes a heat-conducting layer, which is filled on the joint surface 210 , and at least a portion of the heat-conducting layer is disposed on the same layer as the second portion 310 .

[0055] It is understandable that since it is difficult for the second part 310 to completely cover the joint surface 210, there is still a gap between the drill bit 100 and the joint surface 210 where the second part 310 is not set. If the thermal conductivity of the gap is low, the heat of the drill bit 100 can be transferred to the second part 310 more quickly through the thermal conductive layer to improve the heat dissipation efficiency.

[0056] In some embodiments, a portion of the heat conductive layer covers the second portion 310 to fill in between the drill bit 100 and the second portion 310 .

[0057] In some embodiments, the thermally conductive layer is a thermally conductive silicone grease layer.

[0058] In some embodiments, the thermal conductivity of the thermally conductive silicone grease in the thermally conductive silicone grease layer is 2 W / m·K to 6 W / m·K.

[0059] It is understandable that, since the thermal grease has good flexibility and filling performance, the thermal grease can effectively fill the tiny gaps on the joint surface 210, ensuring that the heat generated by the drill bit 100 is efficiently transferred to the heat conductor 300 in the drill rod 200. In addition, the use of thermal grease can not only improve the efficiency of heat conduction, but also ensure the tightness and mechanical strength of the joint surface 210, avoiding local overheating due to heat accumulation. In addition, the joint surface 210 is designed to be close to the drilling part of the drill bit 100, ensuring that the heat generated during the rotation of the drill bit 100 can be quickly transferred to the bottom of the heat conductor 300, thereby efficiently dissipating heat through the heat conductor 300 system.

[0060] In some embodiments of this application, please refer to Fig.10 , Fig.10 The heat conducting member 300 provided in this embodiment is a schematic structural diagram. The heat conducting member 300 in this embodiment is a tubular structure, and a cooling liquid 400 is arranged in the heat conducting member.

[0061] It should be explained that, in the manufacturing process of the drill rod 200, copper is used as the main material of the heat conductor 300, with a thermal conductivity of 385W / m·K and a melting point of 1085°C, which can efficiently transfer heat in the extreme environment of the moon. Aluminum alloy is an ideal choice for the material of the drill rod 200 because of its light weight (thermal conductivity of about 205W / m·K, melting point of 660°C) and good processability. In the manufacturing process, a casting process is adopted to place the heat conductor 300 in a mold, and then molten aluminum alloy or other metal liquid is poured into the mold to wrap the heat conductor 300 and form an integrated drill rod 200 structure. Since the melting point of aluminum alloy is much lower than that of copper, this process can ensure that the heat conductor 300 will not be melted or damaged during the casting process, thereby achieving a close fit between the heat conductor 300 and the joint surface 210 of the drill rod 200, ensuring structural integrity, and enhancing the overall heat dissipation performance. This process is not limited to aluminum alloys, and the process can be used as long as the melting point of the drill rod 200 material is lower than that of the heat conductor 300 material.

[0062] In some embodiments of this application, please continue to refer to Fig.10 The heat conducting member 300 of this embodiment has an inner wall, on which a capillary structure 330 is disposed, and the capillary structure 330 is used to condense the coolant 400. In this way, the vaporized coolant 400 can be quickly condensed through the capillary structure 330, and the condensed coolant 400 flows back to the bottom of the heat conducting member 300 along the capillary structure 330 to continue absorbing heat.

[0063] Specifically, taking lunar drilling as an example, the entire heat dissipation process is as follows:

[0064] During the drilling process, the drill bit 100 generates a large amount of heat due to high-speed friction with the lunar rock layer. The lunar environment lacks air and cannot dissipate heat through convection or radiation. Therefore, the heat is transferred to the second portion 310 (evaporation section) by heat conduction, which is close to the joint surface 210 of the drill bit 100 and the drill rod 200.

[0065] The working fluid (coolant 400) inside the heat conducting member 300 is selected from ethanol, acetone or ammonia, which can evaporate efficiently in the vacuum and low pressure environment of the moon. When the heat is transferred to the evaporation section of the heat conducting member 300, the working fluid absorbs the heat and quickly transforms from liquid to gas. Since the daytime temperature of the moon can be as high as 127°C, ethanol or acetone works very efficiently within this temperature range and can evaporate quickly, taking away the heat from the drill bit 100 area.

[0066] The vaporized working fluid rises into the insulation section and extends along the inside of the drill pipe 200. The vacuum environment of the moon reduces heat loss, and the insulation section ensures efficient heat transfer. The copper outer wall provides high temperature tolerance and structural stability.

[0067] The gaseous working medium reaches the upper condensation section of the heat conductor 300 along the insulation section, which is located at the top of the drill pipe 200 away from the high temperature source. Here, the gaseous working medium encounters low temperatures (the temperature on the moon night can be as low as -173°C), releases the absorbed heat and recondenses into liquid. The copper outer wall plays an important role in this stage. Its high thermal conductivity ensures that the heat of the condensation section can be quickly transferred to the outside of the drill pipe 200 and dissipated to the lunar surface.

[0068] The condensed liquid working fluid flows back to the bottom (evaporation section) of the heat conductor 300 through the capillary structure 330 in the heat conductor 300, and continues to absorb the heat of the drill bit 100, forming a cycle. A powder sintering structure is selected as the capillary structure 330 of the heat conductor 300. This structure can effectively promote the reflux of the working fluid in the vacuum and low gravity environment of the moon, ensuring the smooth evaporation and condensation cycle. The high surface area and uniform pores of the powder sintering structure can adapt to extreme temperature differences and support a variety of working fluids. Regardless of whether ethanol, acetone or ammonia is selected as the working fluid, the powder sintering structure can adapt well to the flow characteristics of these working fluids, further improving the overall performance of the heat conductor 300.

[0069] Furthermore, in order to better implement the drill bit assembly in any of the above embodiments, based on the above drill bit assembly, the present application also provides a drilling device, including the above drill bit assembly.

[0070] In some embodiments, the drilling equipment may be a lunar-based fidelity coring and prospecting space robot.

[0071] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0072] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0073] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0074] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0075] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A drill bit assembly, characterized in that: include: drill; A drill rod connected to the drill bit; The heat conducting member comprises a first part and a second part which are connected to each other, wherein the first part is arranged in the drill rod and extends in a direction away from the joint surface; the second part is arranged on the joint surface between the drill rod and the drill bit, and the second part is bent in the joint surface.

2. The drill bit assembly according to claim 1, characterized in that The second portion is disposed around the boundary of the joint surface.

3. The drill bit assembly according to claim 2, characterized in that There are a plurality of heat conducting members, and the second portions of the plurality of heat conducting members are arranged at intervals along a boundary of the joint surface.

4. The drill bit assembly according to claim 3, characterized in that The first portions of the plurality of heat conducting members are spaced apart along the circumference of the drill rod, and the first portions are extended along the length direction of the drill rod.

5. The drill bit assembly according to claim 3, characterized in that: The plurality of heat conducting members are evenly spaced apart.

6. The drill bit assembly according to claim 1, characterized in that The drill rod is a hollow structure, and the first part is arranged in the side wall of the drill rod.

7. The drill bit assembly according to claim 1, characterized in that The drill bit assembly further comprises a heat-conducting layer, which is filled on the joint surface, and at least a portion of the heat-conducting layer is arranged in the same layer as the second portion.

8. The drill bit assembly according to any one of claims 1 to 7, characterized in that: The heat conducting member is a tubular structure, and a coolant is arranged in the heat conducting member.

9. The drill head assembly according to claim 8, characterized in that The heat conducting member has an inner wall, a capillary structure is arranged on the inner wall, and the capillary structure is used to condense the cooling liquid.

10. A drilling equipment, characterized in that: A drill bit assembly comprising any one of claims 1 to 9.

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