Diamond drill bit for high-efficiency drilling

Abstract

The utility model discloses a high-efficiency diamond drill bit for drilling, which comprises a hard alloy base material layer formed by sintering at high temperature and high pressure and a polycrystalline diamond layer attached on the hard alloy base material layer, and the diamond layer adopts a micro-arc structure with better sharpness. Three cutting edges and four chip discharging grooves are formed in the top face through laser etching or diamond grinding wheel grinding, the sharpness degree and the rock breaking effect of the diamond compact are further improved, secondly, the main body can be rapidly mounted and dismounted, meanwhile, the main body is mounted more stably through limiting of a fixing bolt and a rotating rod, and the service life of the main body is prolonged. The utility model has the advantages of simple structure, convenient operation, fast disassembly, reduced replacement time and improved efficiency while ensuring the normal work, and finally, the utility model has the characteristics of high rock breaking efficiency and strong impact resistance, is especially suitable for high-speed drilling operation, and can greatly improve the drilling effect and reduce the operation cost.

Description

Technical Field

[0001] The utility model relates to the technical field of superhard material manufacturing, in particular to a high-efficiency diamond drill bit for drilling. Background Art

[0002] Polycrystalline diamond composite (PDC) is an ultra-hard composite material made by sintering diamond powder and cemented carbide under high temperature and high pressure conditions. It combines the high hardness, high wear resistance, and good thermal conductivity of diamond with the strength and impact toughness of cemented carbide. It is an ideal material for manufacturing cutting tools, drilling bits, and other wear-resistant tools. It is widely used in operations such as oil drilling, geological exploration, coal drilling, and water well drilling.

[0003] The existing diamond composite drill bits have poor self-sharpening properties of the diamond layer, resulting in poor sharpness and slow drilling efficiency during high-speed drilling operations, which seriously restricts the application of diamond composite drill bits.

[0004] Secondly, most of the diamond composite sheets on the drill bit are welded or cast as one piece, which makes replacement and disassembly difficult, affecting the project progress and reducing work efficiency. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the utility model provides a high-efficiency diamond drill bit for drilling.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-efficiency diamond drill bit for drilling, comprising a main body and a quick installation mechanism, the main body being provided with a polycrystalline diamond layer, a chip removal groove and a cutting edge, the main body being made of a cemented carbide substrate layer, the polycrystalline diamond layer being fixedly mounted on the main body, the chip removal groove and the cutting edge being respectively arranged on the polycrystalline diamond layer, the quick installation mechanism comprising a connecting rod, a drill bit, a connecting plate, a fixing bolt and a rotating rod, the connecting rod being fixedly mounted on the main body, the drill bit being detachably connected to the main body, the connecting plate being mounted inside the drill bit and being rotatably connected to the drill bit, the fixing bolt being detachably connected to the connecting plate and engaging with the drill bit thread, and the rotating rod engaging with the drill bit thread.

[0009] Preferably, the cutting edges and the chip removal grooves are symmetrically distributed on the polycrystalline diamond layer, and the sizes and positions of the cutting edges and the chip removal grooves can be adjusted according to applicable working conditions to facilitate adaptation to various operating scenarios.

[0010] It is further preferred that the production methods of the cutting edge and the chip removal groove include but are not limited to high temperature and high pressure one-time molding, subsequent diamond grinding wheel processing, and laser etching, and the cross-section of the chip removal groove is an arc or a triangle, which is easy to manufacture and convenient to produce.

[0011] It is further preferred that the width of the cutting edge is 0.3-4 mm, the number is 3, the size of the cutting groove is 2-8 mm, the number is 4, so as to ensure the rock breaking effect in the face of different geological conditions and reduce the risk of edge collapse.

[0012] In a further embodiment, the diameter of the main body includes 8 mm, 10 mm, 11 mm, 13.4 mm, 16 mm and 19 mm, ranging from 4 to 25 mm, and the height range is 3 to 19 mm, so as to facilitate installation on different drill bits.

[0013] In a further embodiment, an entry hole and a sliding groove are provided on the connecting disk, the connecting rod enters the connecting disk through the entry hole, and the connecting rod slides in the sliding groove, so as to facilitate the normal operation of the quick installation mechanism.

[0014] In a further embodiment, a limit plate is provided on the connecting rod, a protrusion is provided on the connecting plate, the limit plate is separately connected to the connecting plate, and the protrusion rotates inside the drill bit to facilitate the rotation of the connecting plate.

[0015] In a further embodiment, a rotation groove is provided inside the drill bit, an insertion hole is provided on the drill bit, and the main body is detachably connected to the insertion hole, so as to facilitate the disassembly and installation of the main body.

[0016] In a further embodiment, the drill bit is provided with cutting wings, on which a polycrystalline diamond layer is fixedly mounted, so as to improve the cutting durability of the drill bit.

[0017] (3) Beneficial effects

[0018] Compared with the prior art, the present invention provides a high-efficiency diamond drill bit for drilling, which has the following beneficial effects:

[0019] The utility model provides the cutting edge and the cutting groove on the main body, so that the diamond composite sheet has the advantages of high sharpness, good self-sharpening, not easy to collapse, fast rock cutting speed, better rock crushing effect, high drilling efficiency, etc. It is particularly suitable for exploration and drilling operations in medium-hard and above strata, and can significantly improve operating efficiency.

[0020] The utility model provides a quick installation mechanism. With the cooperation of components such as the connecting rod, the drill bit, the connecting plate, the fixing bolt and the rotating rod, the device can quickly install and disassemble the main body. At the same time, the limiting of the fixing bolt and the rotating rod makes the installation of the main body more fixed. While ensuring normal operation, it can be quickly disassembled, reducing replacement time and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency diamond drill bit for drilling in the utility model;

[0022] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0023] Figure 3 This is an exploded view of the internal structure of the drill bit in this utility model.

[0024] In the figure: 1. Main body; 2. Polycrystalline diamond layer; 3. Chip removal groove; 4. Cutting edge; 5. Connecting rod; 6. Drill bit; 7. Connecting plate; 8. Fixing bolt; 9. Rotating rod; 10. Entry hole; 11. Sliding groove; 12. Limiting plate; 13. Bump; 14. Rotating groove; 15. Insertion hole; 16. Cutting wing. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1:

[0027] See also Figure 1-3 A high-efficiency diamond drill bit for drilling includes a main body 1 and a quick installation mechanism. The main body 1 is provided with a polycrystalline diamond layer 2, a cutting groove 3 and a cutting edge 4. The main body 1 is made of a cemented carbide substrate layer. The polycrystalline diamond layer 2 is fixedly installed on the main body 1. The cutting groove 3 and the cutting edge 4 are respectively arranged on the polycrystalline diamond layer 2. The quick installation mechanism includes a connecting rod 5, a drill bit 6, a connecting plate 7, a fixing bolt 8 and a rotating rod 9. The connecting rod 5 is fixedly arranged on the main body 1, and the drill bit 6 is detachably connected to the main body 1. The connecting plate 7 is installed inside the drill bit 6 and is rotatably connected to the drill bit 6. The fixing bolt is separated from the connecting plate 7 and threadedly engaged with the drill bit 6. The rotating rod 9 is threadedly engaged with the drill bit 6.

[0028] In this embodiment, the main body 1 is provided with a polycrystalline diamond layer 2, a cutting groove 3 and a cutting edge 4. During use, when the polycrystalline diamond layer 2 on the main body 1 contacts the rock, the sharp cutting edge 4 for squeezing and crushing the rock begins to squeeze and crush the rock, and then discharges it in the cutting groove 3, completing the crushing and discharge of the rock.

[0029] In this embodiment, the quick installation mechanism includes a connecting rod 5, a drill bit 6, a connecting disk 7, a fixing bolt 8 and a rotating rod 9. When in use, the connecting rod 5 is inserted into the insertion hole 15 on the drill bit 6, and the limit disk 12 on the connecting rod 5 enters the entry hole 10 of the connecting disk 7. Then the connecting disk 7 is rotated, and the protrusion 13 on the connecting disk 7 rotates in the rotating groove 14, and the connecting rod 5 slides in the sliding groove 11. At this time, the fixing bolt 8 is inserted into the connecting disk 7 to fix the connecting disk 7 installed inside the drill bit 6. Then the drill bit 6 is installed on the rotating rod 9. While engaging with the rotating rod 9 threadedly, the rotating rod 9 enters the inside of the drill bit 6 and is in close contact with the fixing bolt 8 and the limiting disk 12 respectively, forming a secondary limit to prevent the fixing bolt 8 from being shaken out due to vibration.

[0030] Example 2:

[0031] In summary, when in use, first install the drill bit 6 and the main body 1, insert the connecting rod 5 into the insertion hole 15 on the drill bit 6, and the limit plate 12 on the connecting rod 5 enters the entry hole 10 of the connecting plate 7, then rotate the connecting plate 7, the protrusion 13 on the connecting plate 7 rotates in the rotation groove 14, and makes the connecting rod 5 slide in the sliding groove 11, at this time insert the fixing bolt 8 into the connecting plate 7, thereby fixing the connecting plate 7 installed inside the drill bit 6, then install the drill bit 6 on the rotating rod 9, and while the rotating rod 9 is threadedly engaged with the rotating rod 9, the rotating rod 9 enters the drill bit. 6 and are in close contact with the fixing bolt 8 and the limit plate 12 respectively, forming a secondary limit to prevent the fixing bolt 8 from being shaken out due to vibration, and then start to operate. When the polycrystalline diamond layer 2 on the main body 1 contacts the rock, the sharp cutting edge 4 that squeezes and crushes the rock begins to squeeze and crush the rock, and then discharges it in the cutting groove 3, completing the crushing and discharge of the rock. When drilling begins, the main body 1 and the giant whale diamond layer 2 on the cutting wing 16 first contact the rock, and then the cutting wing 16 cuts it for the second time, thereby ensuring the rapid progress of the drilling process.

[0032] In all the schemes mentioned above, the connection between the two components can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection or other well-known connection methods, which will not be listed here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field 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 attached claims and their equivalents.

Claims

1. A high-efficiency diamond drill bit for drilling, comprising a main body (1) and a quick installation mechanism, characterized in that: The main body (1) is provided with a polycrystalline diamond layer (2), a cutting groove (3) and a cutting edge (4); the main body (1) is made of a hard alloy substrate layer; the polycrystalline diamond layer (2) is fixedly mounted on the main body (1); the cutting groove (3) and the cutting edge (4) are respectively arranged on the polycrystalline diamond layer (2); the quick installation mechanism comprises a connecting rod (5), a drill bit (6), a connecting plate (7), a fixing bolt (8) and a rotating rod (9); the connecting rod (5) is fixedly mounted on the main body (1); the drill bit (6) is detachably connected to the main body (1); the connecting plate (7) is mounted inside the drill bit (6) and is rotatably connected to the drill bit (6); the fixing bolt (8) is detachably connected to the connecting plate (7) and is threadably engaged with the drill bit (6); and the rotating rod (9) is threadably engaged with the drill bit (6).

2. A high-efficiency diamond drill bit for drilling according to claim 1, characterized in that: The cutting edge (4) and the chip removal groove (3) are symmetrically distributed on the polycrystalline diamond layer (2), and the size and position of the cutting edge (4) and the chip removal groove (3) can be adjusted according to applicable working conditions.

3. The high-efficiency diamond drill bit according to claim 1, characterized in that: The production methods of the cutting edge (4) and the chip removal groove (3) include, but are not limited to, high temperature and high pressure one-step forming, subsequent diamond grinding wheel grinding, and laser etching, and the cross section of the chip removal groove (3) is an arc or a triangle.

4. A high-efficiency diamond drill bit for drilling according to claim 3, characterized in that: The width of the cutting edge (4) is 0.3-4 mm, and the number is 3; the size of the cutting groove (3) is 2-8 mm, and the number is 4.

5. The high-efficiency diamond drill bit according to claim 1, characterized in that: The diameters of the main body (1) include 8 mm, 10 mm, 11 mm, 13.4 mm, 16 mm and 19 mm, ranging from 4 to 25 mm, and the height range is from 3 to 19 mm.

6. The high-efficiency diamond drill bit according to claim 1, characterized in that: An entry hole (10) and a sliding groove (11) are provided on the connecting disk (7); the connecting rod (5) enters the connecting disk (7) through the entry hole (10); and the connecting rod (5) slides in the sliding groove (11).

7. The high-efficiency diamond drill bit according to claim 1, characterized in that: A limiting disk (12) is provided on the connecting rod (5), a protrusion (13) is provided on the connecting disk (7), the limiting disk (12) is connected to the connecting disk (7) in a separate manner, and the protrusion (13) rotates inside the drill bit (6).

8. The high-efficiency diamond drill bit according to claim 7, characterized in that: A rotation groove (14) is provided inside the drill bit (6), an insertion hole (15) is provided on the drill bit (6), and the main body (1) is connected to the insertion hole (15) in a separate manner.

9. The high-efficiency diamond drill bit according to claim 8, characterized in that: The drill bit (6) is provided with a cutting wing (16), and a polycrystalline diamond layer (2) is fixedly mounted on the cutting wing (16).

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