An assembled synthetic drill bit
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI ZUANLONG DRILLING MASCH CO LTD
- Filing Date
- 2025-09-17
- Publication Date
- 2026-07-03
AI Technical Summary
Existing drill bits are prone to chipping during drilling due to insufficient hardness of alloy materials, while full diamond composite sheets are expensive and prone to detachment during drilling, leading to failure.
The assembled synthetic drill bit, through the design of the support body, assembly components and limiting components, uses threaded connections and positioning screws to restrict the rotation of the diamond composite sheet, and combines the advantages of alloy materials to achieve stable rock breaking and allow for individual replacement of the diamond composite sheet.
It achieves high-performance drilling at a cost-effective rate, avoids the need to replace the entire drill bit, reduces costs, and ensures drilling stability and efficiency.
Smart Images
Figure CN224452721U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of drill bit design technology, and specifically relates to an assembled composite drill bit. Background Technology
[0002] During drilling, it is inevitable to encounter rock layers, so a drill bit with high material hardness is needed to break the rock. However, using all-diamond composite sheets for drilling at present leads to using too much material for too little cost. To reduce costs, alloy materials are used, but their hardness is insufficient and they are prone to chipping when encountering rocks.
[0003] In the existing technology, the alloy material used for coal drilling and the diamond material used for rock drilling are usually connected by assembly, which can solve the above problems. However, when the two parts are combined, it cannot be guaranteed that they will separate during the drilling process, which may lead to drilling failure.
[0004] Therefore, there is an urgent need for an assembled synthetic drill bit to solve the above problems. Utility Model Content
[0005] To achieve the above objectives, this utility model provides the following technical solution: an assembled synthetic drill bit, comprising: a support body connected to an external drill rod, the support body having a threaded hole on its end face; an assembly component including a threaded post and a first rock-breaking post, the threaded post being threadedly connected to the threaded hole, the first rock-breaking post being fixed to the end face of the threaded post; and a limiting component including a limiting ring and a positioning screw, the limiting ring being fixed to the end face of the support body, the limiting ring being coaxially arranged with the limiting ring, a first screw hole being provided on the side wall of the limiting ring, a second screw hole being provided on the peripheral wall of the first rock-breaking post, and the positioning screw being threadedly connected to the first screw hole and the second screw hole;
[0006] After the threaded column is threaded into the threaded hole, it can be used to crush rocks. After the positioning screw is assembled with thread one and thread two, it can limit the first rock-breaking column, so that the first rock-breaking column can crush rocks stably.
[0007] As a further improvement of this utility model, the threaded column, the first rock-breaking column, and the threaded hole are arranged in at least two circumferential configurations.
[0008] As a further improvement of this utility model, the first rock-breaking column is configured as a diamond composite sheet.
[0009] As a further improvement of this utility model, the inner peripheral wall of the limiting ring contacts the outer peripheral wall of the first rock-breaking column, and the end of the positioning screw contacts the outer peripheral wall of the limiting ring.
[0010] As a further improvement of this utility model, it also includes a fixed drilling component, including a gauge-maintaining strip and a second rock-breaking column, wherein the gauge-maintaining strip is fixed to the end face of the support body and the second rock-breaking column is fixed to the gauge-maintaining strip;
[0011] The second rock-breaking column is used to drill through the surrounding coal seam to achieve comprehensive drilling.
[0012] As a further improvement of this utility model, the depth of the second rock-breaking column is greater than the depth of the first rock-breaking column.
[0013] As a further improvement of this utility model, the diameter-maintaining strip and the second rock-breaking column are configured as alloy materials.
[0014] As a further improvement of this utility model, multiple diameter-maintaining strips are arranged circumferentially, and multiple sets of second rock-breaking columns are arranged circumferentially, with multiple columns in each set. The second rock-breaking columns are linearly fixed on one of the diameter-maintaining strips.
[0015] As a further improvement of this utility model, the cutting radius of one of the first rock-breaking columns and each group of multiple second rock-breaking columns is equal to the radius of the hole to be drilled.
[0016] As a further improvement of this utility model, a plurality of discharge holes are provided on the end face of the support body, and a slag discharge hole is provided inside the support body, and the plurality of discharge holes are all connected to the slag discharge hole.
[0017] Compared with the prior art, the beneficial effects of this utility model are:
[0018] 1. By combining the assembly components and the limiting components, the positioning screw can restrict the first rock-breaking column from rotating under the action of the rock, preventing the first rock-breaking column from separating from the support body, thereby ensuring that the first rock-breaking column can rotate and drill stably with the support body.
[0019] 2. By setting up assembly components, the advantages of alloy materials and diamond composite sheets are combined, resulting in high cost performance. On the other hand, the first rock-breaking column can be replaced separately without replacing the entire drill bit, thus saving costs. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of an assembled composite drill bit;
[0021] Figure 2 This is a schematic diagram of the assembly component structure of an assembled synthetic drill bit;
[0022] Figure 3 A schematic diagram of the limiting component structure of an assembled synthetic drill bit;
[0023] Figure 4This is a schematic diagram showing the location distribution of slag discharge holes in an assembled synthetic drill bit.
[0024] Among them, 1. Support body; 2. Assembly component; 21. Threaded column; 22. First rock-breaking column; 3. Limiting component; 31. Limiting ring; 32. Positioning screw; 4. Drilling component; 41. Gauge retaining strip; 42. Second rock-breaking column; 11. Discharge hole; 12. Slag discharge hole. Detailed Implementation
[0025] See Figures 1 to 4 As shown, an assembled synthetic drill bit includes a support body 1, an assembly component 2, and a limiting component 3. The support body 1 is connected to an external drill rod, and a threaded hole is formed on the end face of the support body 1. The assembly component 2 includes a threaded post 21 and a first rock-breaking post 22. The threaded post 21 is threaded into the threaded hole, and the first rock-breaking post 22 is fixed to the end face of the threaded post 21. The limiting component 3 includes a limiting ring 31 and a positioning screw 32. The limiting ring 31 is fixed to the end face of the support body 1 and is coaxially arranged with the first rock-breaking post 22. A first screw hole is formed on the side wall of the limiting ring 31, and a second screw hole is formed on the peripheral wall of the first rock-breaking post 22. The positioning screw 32 is threaded into the first screw hole and the second screw hole.
[0026] Before drilling, the first rock-breaking column 22 and the threaded column 21 are twisted together to the bottom of the threaded hole, so that the first threaded hole and the second threaded hole are in a coaxial position. Then, the positioning screw 32 is twisted so that the positioning screw 32 passes through the first threaded hole and the second threaded hole. At this point, the positioning screw 32 can restrict the first rock-breaking column 22 from rotating, preventing the first rock-breaking column 22 from separating from the support body 1, thereby ensuring that the first rock-breaking column 22 can stably rotate synchronously with the support body 1 during drilling.
[0027] In a preferred embodiment, the threaded column 21, the first rock-breaking column 22, and the threaded hole are arranged in at least two circumferential configurations.
[0028] In other words, setting two sets of first rock-breaking columns 22 around the circumference can make the force on the rock evenly distributed on the two first rock-breaking columns 22, avoid local overload, and make the drilling work stable.
[0029] In a preferred embodiment, the first rock-breaking column 22 is configured as a diamond composite sheet.
[0030] It should be noted that since the first rock-breaking column 22 needs to break hard rock, its material needs to be of high hardness and not prone to chipping. The diamond composite sheet has the characteristic of high hardness, so chipping can be avoided during drilling.
[0031] In addition, the first rock-breaking column 22 may become dull after long-term use. With the design of this application, only the first rock-breaking column 22 needs to be disassembled and replaced, without replacing the entire drill bit, thus reducing the investment cost.
[0032] In a preferred embodiment, the inner peripheral wall of the limiting ring 31 contacts the outer peripheral wall of the first rock-breaking column 22, and the end of the positioning screw 32 contacts the outer peripheral wall of the limiting ring 31.
[0033] To prevent slag from entering the gap between the two assembly parts during drilling, so as to facilitate smooth disassembly and installation.
[0034] In a preferred embodiment, the system also includes a fixed drilling assembly 4, comprising a gauge bar 41 and a second rock-breaking column 42. The gauge bar 41 is fixed to the end face of the support body 1, and the second rock-breaking column 42 is fixed to the gauge bar 41.
[0035] During the rock-breaking process of the first rock-breaking column 22, the second rock-breaking column 42 rotates synchronously with the first rock-breaking column 22, which can drill the coal seam.
[0036] In a preferred embodiment, the depth of the second rock-breaking column 42 is greater than the depth of the first rock-breaking column 22.
[0037] In other words, during drilling, the first rock-breaking column 22 comes into contact with the surface to be drilled first, thus being able to contact the rock and break it, so the second rock-breaking column 42 only needs to remove drill cuttings from the coal seam.
[0038] In a preferred embodiment, the gauge bar 41 and the second rock-breaking column 42 are configured as alloy materials.
[0039] Since coal seams are less hard than rocks, using alloy materials can reduce costs while still meeting strength requirements.
[0040] In a preferred embodiment, multiple diameter-maintaining strips 41 are arranged circumferentially, and multiple sets of second rock-breaking pillars 42 are arranged circumferentially, with multiple sets in each set. The second rock-breaking pillars 42 are linearly fixed on one of the diameter-maintaining strips 41.
[0041] Each set of second rock-breaking columns 42 can evenly distribute the force of the coal seam on the two second rock-breaking columns 42, avoiding local overload and enabling the drilling work to proceed stably.
[0042] In a preferred embodiment, the cutting radius of one of the first rock-breaking columns 22 and each group of multiple second rock-breaking columns 42 is equal to the radius of the hole to be drilled.
[0043] The second rock-breaking column 42 is combined with the first rock-breaking column 22. When rotating, it can make full contact with the surface to be drilled, ensuring that the hole shape is always cylindrical and eliminating the need for secondary hole repair.
[0044] In a preferred embodiment, a plurality of discharge holes 11 are provided on the end face of the support body 1, and a slag discharge hole 12 is provided inside the support body 1, and the plurality of discharge holes 11 are all connected to the slag discharge hole 12.
[0045] In other words, during drilling, the slag will enter the slag discharge hole 12 through the discharge hole 11 and eventually be discharged into the slag collection equipment on the ground.
[0046] Specifically, during implementation, before drilling, the first rock-breaking column 22 and the threaded column 21 are screwed together to the bottom of the threaded hole, so that threaded hole one and threaded hole two are in a coaxial position. Then, the positioning screw 32 is turned so that the positioning screw 32 passes through threaded hole one and threaded hole two. The positioning screw 32 can restrict the rotation of the first rock-breaking column 22, prevent the first rock-breaking column 22 from separating from the support body 1, and ensure that the first rock-breaking column 22 can rotate and drill stably with the support body 1. During drilling, the first rock-breaking column 22 rotates to break the rock, the second rock-breaking column 42 breaks the coal, and the slag will enter the slag discharge hole 12 through multiple discharge holes 11 and finally be discharged into the slag collection equipment on the ground.
[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be primarily defined by the scope of the claims.
Claims
1. A fabricated synthetic drill bit, characterized by: include: Support body (1), the support body (1) is connected to the external drill rod, and the end face of the support body (1) is provided with a threaded hole; Assembly component (2) includes a threaded post (21) and a first rock-breaking post (22), wherein the threaded post (21) is threadedly connected in the threaded hole and the first rock-breaking post (22) is fixed to the end face of the threaded post (21); The limiting component (3) includes a limiting ring (31) and a positioning screw (32). The limiting ring (31) is fixed on the end face of the support (1). The limiting ring (31) is coaxially arranged with the limiting ring (32). A screw hole one is opened on the side wall of the limiting ring (31). A screw hole two is opened on the peripheral wall of the first rock breaking column (22). The positioning screw (32) is threadedly connected to the screw hole one and the screw hole two. The threaded column (21) is threaded into the threaded hole and can be used to crush rocks. The positioning screw (32) is assembled with thread one and thread two and can limit the first rock-breaking column (22) so that the first rock-breaking column (22) can stably break rocks.
2. A built-up synthetic drill bit according to claim 1, wherein: The threaded column (21), the first rock-breaking column (22), and the threaded hole are arranged in at least two circumferential configurations.
3. A built-up synthetic drill bit according to claim 2, wherein: The first rock-breaking column (22) is configured as a diamond composite sheet.
4. The assembled synthetic drill bit of claim 1, wherein: The inner peripheral wall of the limiting ring (31) is in contact with the outer peripheral wall of the first rock-breaking column (22), and the end of the positioning screw (32) is in contact with the outer peripheral wall of the limiting ring (31).
5. The assembled synthetic drill bit of claim 1, wherein: It also includes a fixed drilling assembly (4), including a gauge bar (41) and a second rock-breaking column (42), wherein the gauge bar (41) is fixed on the end face of the support body (1) and the second rock-breaking column (42) is fixed on the gauge bar (41); The second rock-breaking column (42) is used to drill through the surrounding coal seam to achieve full drilling.
6. A built-up synthetic drill bit as defined in claim 5 wherein: The depth of the second rock-breaking column (42) is greater than the depth of the first rock-breaking column (22).
7. A built-up synthetic drill bit as defined in claim 5 wherein: The gauge bar (41) and the second rock-breaking column (42) are configured as alloy materials.
8. A built-up synthetic drill bit as defined in claim 5 wherein: The diameter-maintaining strip (41) is arranged in multiple circumferences, and the second rock-breaking column (42) is arranged in multiple groups on the circumference, with multiple groups in each group. The second rock-breaking column (42) is linearly fixed on one of the diameter-maintaining strips (41).
9. The assembled synthetic drill bit of claim 5, wherein: The cutting radius of one of the first rock-breaking columns (22) and each group of multiple second rock-breaking columns (42) is equal to the radius of the hole to be drilled.
10. The assembled synthetic drill bit of claim 1, wherein: The support body (1) has multiple discharge holes (11) on its end face and a slag discharge hole (12) inside the support body (1). All of the discharge holes (11) are connected to the slag discharge hole (12).