Anti-erosion PDC drill bit

Abstract

The utility model discloses an anti-erosion PDC (Polycrystalline Diamond Compact) drill bit, which relates to the technical field of PDC drill bits and comprises a handle part, the top of the handle part is fixedly connected with a connecting end, the top of the connecting end is fixedly connected with a drill bit part, the outer wall of the drill bit part is fixedly connected with an anti-erosion component, and the outer wall of the drill bit part is connected with a connecting nut in a penetrating manner. The bottom of the exhaust plate is also connected with the telescopic rod and the spring rod, the exhaust pipe is inserted into one end of the mounting barrel, the exhaust device plays a role of a piston, the pressure and the speed of fluid flowing out of a nozzle of the drill bit part are reduced, the impact force acting on the drill bit part is reduced, the risk of excessive erosion of the drill bit is reduced, and the service life of the drill bit is prolonged. Object scraps generated in the drilling process can be discharged from the middle portions of the two sets of anti-impact assemblies, the top of the connecting groove and the top of the abrasion-resistant layer are high, internal air convection is facilitated, the object scraps rapidly fall off, and abrasion of the object scraps to the cutting teeth is reduced.

Description

Technical Field

[0001] This utility model relates to the field of PDC drill bit technology, and specifically to an anti-erosion PDC drill bit. Background Technology

[0002] PDC (polycrystalline diamond composite) drill bits are commonly used rock-breaking tools in oil drilling, widely used in oilfields due to their high mechanical drilling speed, long service life, and safe and reliable operation. However, with the continuous improvement of high-pressure jet drilling technology and the increasing prevalence of aggressive parameter drilling, drill bits face increasingly harsh operating conditions. In particular, the excessive erosion caused by high pump speeds and high flow rates on steel-bodied PDC drill bits is becoming increasingly prominent, sometimes resulting in cutting teeth falling out of the tooth cavity, thus affecting the lifespan of the drill bit and drilling efficiency. Therefore, improving the erosion resistance of PDC drill bits is urgent. Conventional steel-bodied PDC drill bits are made by welding WC wear-resistant alloy onto the drill bit surface, but this method can no longer meet the requirements of high-pressure jet drilling. In addition, Smith & Nephew has launched erosion-resistant drill bits using 3D-printed armor technology, but due to the complexity of the drill bit structure and manufacturing process, as well as high costs, it is not conducive to widespread application.

[0003] The existing technology has the following problems:

[0004] 1. Existing anti-erosion PDC drill bits have fixed drill bit connection ends, and there is no buffering force during the drilling process, which makes the impact force easy to cause erosion damage to the drill bit.

[0005] 2. Existing anti-erosion PDC drill bits have a straight outer profile, which easily increases the resistance of the drill bit and the waste chips cannot be discharged quickly, which easily causes wear on the cutting teeth and shortens the service life of the device. Utility Model Content

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A PDC drill bit with erosion resistance includes a shank, a connecting end fixedly connected to the top of the shank, a drill head fixedly connected to the top of the connecting end, an anti-erosion component fixedly connected to the outer wall of the drill head, a connecting nut penetrating the outer wall of the drill head, and an venting device penetrating the outer wall of the connecting end. The venting device includes a mounting cylinder, and a groove is formed on the outer wall of the connecting end. An anti-slip end is fixedly connected inside the groove.

[0008] A further improvement of this utility model is that: the inner wall of the handle is provided with a threaded groove, and a plug rod is fixedly connected to the top of the connecting end.

[0009] A further improvement of this utility model is that: one end of the mounting cylinder is inserted into the interior of the connecting end, a sliding groove is provided on the inner wall of the mounting cylinder, an exhaust plate is slidably connected inside the sliding groove, a telescopic rod is fixedly connected to one side of the exhaust plate, a spring rod is sleeved on one end of the telescopic rod, and an exhaust pipe is connected through one end of the mounting cylinder.

[0010] A further improvement of this utility model is that one end of the exhaust pipe is connected to the inner wall of the connecting end, and one end of the telescopic rod is fixedly connected to the inside of the mounting cylinder.

[0011] A further improvement of the present invention is that the drill bit includes a connecting cylinder, the top of the connecting cylinder is provided with a connecting groove, the outer wall of the connecting cylinder is fixedly connected with a fixed end, the outer wall of the fixed end is fixedly connected with a cutting tooth, and the outer wall of the cutting tooth is fixedly connected with a wear-resistant layer.

[0012] A further improvement of this utility model is that the cutting teeth are installed on one side of the wear-resistant layer, and one end of the connecting groove faces the middle part of the two sets of fixed ends.

[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0014] This utility model provides an anti-erosion PDC drill bit. The outer wall of the connecting end is inserted into an exhaust device. The mounting cylinder of the exhaust device is fixedly installed inside the connecting end. An exhaust plate is installed inside the groove. The bottom of the exhaust plate is also connected to a telescopic rod and a spring rod. An exhaust pipe is inserted into one end of the mounting cylinder. The exhaust pipe discharges the internal gas of the connecting end from one side of the mounting cylinder. The exhaust device acts as a piston. The fluid pressure and velocity flowing out of the nozzle of the drill bit are reduced, thereby reducing the impact force acting on the drill bit and reducing the risk of excessive erosion of the drill bit.

[0015] This utility model provides an anti-erosion PDC drill bit. The top of the drill bit has a connecting groove that opens into the middle part of two anti-erosion components. The cutting teeth are rotated by the motor to start drilling. During the drilling process, the debris generated can be discharged from the middle part of the two anti-erosion components. The connecting groove and the top of the wear-resistant layer are relatively high, which facilitates internal air convection and allows debris to fall off quickly, thereby reducing the wear of debris on the cutting teeth and making the drill bit last longer. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the anti-erosion PDC drill bit of this utility model.

[0017] Figure 2 This is a schematic diagram of the handle of this utility model;

[0018] Figure 3 This is a schematic diagram of the exhaust device of this utility model;

[0019] Figure 4 This is a schematic diagram of the anti-impact component of this utility model.

[0020] In the diagram: 1. Shank; 2. Connecting end; 3. Drill head; 4. Anti-impact component; 5. Connecting nut; 6. Venting device; 7. Groove; 8. Anti-slip end; 11. Threaded groove; 21. Insert rod; 31. Connecting cylinder; 32. Connecting groove; 41. Fixed end; 42. Gear cutter; 43. Wear-resistant layer; 61. Mounting cylinder; 62. Slide groove; 63. Venting plate; 64. Telescopic rod; 65. Spring rod; 66. Venting pipe. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to embodiments:

[0022] Example 1

[0023] like Figure 1-4 As shown, this utility model provides an anti-erosion PDC drill bit, including a shank 1, a connecting end 2 fixedly connected to the top of the shank 1, a drill head 3 fixedly connected to the top of the connecting end 2, an anti-erosion component 4 fixedly connected to the outer wall of the drill head 3, a connecting nut 5 penetrating the outer wall of the drill head 3, an exhaust device 6 penetrating the outer wall of the connecting end 2, the exhaust device 6 including a mounting cylinder 61, a groove 7 formed on the outer wall of the connecting end 2, and an anti-slip end 8 fixedly connected inside the groove 7.

[0024] The inner wall of the handle 1 is provided with a threaded groove 11, and the top of the connecting end 2 is fixedly connected with a plug rod 21.

[0025] In this embodiment, the combined action of the handle 1, the connecting end 2, and the drill head 3 makes the device easier to use. The top of the handle 1 is fixedly connected to the bottom of the drill head 3 through the connecting end 2. The inner wall of the handle 1 is provided with a threaded groove 11 to facilitate the threaded connection between the drill head and the output end of the machine gun. The top of the connecting end 2 is fixedly connected with a plug rod 21, which is fixedly inserted into the inside of the drill head 3. The connection between the two is more stable, and the hardness of the drill head 3 is also increased, making the use of the drill head more robust.

[0026] Example 2

[0027] like Figure 1-4As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, one end of the mounting cylinder 61 is inserted into the interior of the connecting end 2, the inner wall of the mounting cylinder 61 is provided with a sliding groove 62, an exhaust plate 63 is slidably connected inside the sliding groove 62, a telescopic rod 64 is fixedly connected to one side of the exhaust plate 63, a spring rod 65 is sleeved on one end of the telescopic rod 64, and an exhaust pipe 66 is connected through one end of the mounting cylinder 61.

[0028] One end of the exhaust pipe 66 is connected to the inner wall of the connecting end 2, and one end of the telescopic rod 64 is fixedly connected to the inside of the mounting cylinder 61.

[0029] In this embodiment, the device is made more convenient to use by the combined action of the connecting end 2 and the exhaust device 6. The outer wall of the connecting end 2 is inserted into the exhaust device 6, and the mounting cylinder 61 of the exhaust device 6 is fixedly installed inside the connecting end 2. The exhaust plate 63 is installed inside the slide groove 62, and the bottom of the exhaust plate 63 is also connected to the telescopic rod 64 and the spring rod 65. One end of the mounting cylinder 61 is inserted into the exhaust pipe 66, which discharges the internal gas of the connecting end 2 from one side of the mounting cylinder 61. The exhaust device 6 acts as a piston, and the fluid pressure and velocity flowing out of the nozzle of the drill bit 3 are reduced, thereby reducing the impact force acting on the drill bit 3 and reducing the risk of excessive erosion of the drill bit.

[0030] Example 3

[0031] like Figure 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, the drill bit 3 includes a connecting cylinder 31, the top of the connecting cylinder 31 is provided with a connecting groove 32, the outer wall of the connecting cylinder 31 is fixedly connected to a fixed end 41, the outer wall of the fixed end 41 is fixedly connected to a cutting tooth 42, and the outer wall of the cutting tooth 42 is fixedly connected to a wear-resistant layer 43.

[0032] The cutting teeth 42 are installed on one side of the wear-resistant layer 43, and one end of the connecting groove 32 faces the middle part of the two sets of fixed ends 41.

[0033] In this embodiment, the combined action of the drill head 3 and the anti-impact component 4 makes the device more convenient to use. The top of the drill head 3 is provided with a connecting groove 32, which is located in the middle of the two sets of anti-impact components 4. The cutting teeth 42 are rotated by the motor, and the drilling begins. During the drilling process, the debris generated can be discharged from the middle of the two sets of anti-impact components 4. The connecting groove 32 and the top of the wear-resistant layer 43 are relatively high, which facilitates internal air convection and allows the debris to fall off quickly, thereby reducing the wear of the cutting teeth 42 by the debris and making the drill head 3 last longer.

[0034] The working principle of this erosion-resistant PDC drill bit will be explained in detail below.

[0035] like Figure 1-4 As shown, when this erosion-resistant PDC drill bit is in use, the top of the shank 1 is fixedly connected to the bottom of the drill head 3 via the connecting end 2. The inner wall of the shank 1 is provided with a threaded groove 11 to facilitate threaded connection between the drill bit and the output end of the machine gun. A connector rod 21 is fixedly connected to the top of the connecting end 2, and the connector rod 21 is fixedly inserted into the inside of the drill head 3, making the connection more stable and increasing the hardness of the drill head 3, thus making the drill bit more robust. The outer wall of the connecting end 2 is inserted into the venting device 6, and the mounting cylinder 61 of the venting device 6 is fixedly installed inside the connecting end 2. An venting plate 63 is installed inside the sliding groove 62, and the bottom of the venting plate 63 is also connected to a telescopic rod 64 and a spring rod 65. One end of the mounting cylinder 61 is inserted into an venting pipe 66. The venting pipe 66 is... The internal gas of the connecting end 2 is discharged from one side of the mounting cylinder 61. The exhaust device 6 acts as a piston, and the fluid pressure and velocity flowing out of the nozzle of the drill head 3 are reduced, thereby reducing the impact force on the drill head 3 and reducing the risk of excessive erosion of the drill bit. The top of the drill head 3 is provided with a connecting groove 32, which is located in the middle part of the two sets of anti-impact components 4. The cutting teeth 42 are rotated by the motor, and the drilling begins. During the drilling process, the debris generated can be discharged from the middle part of the two sets of anti-impact components 4. The connecting groove 32 and the top of the wear-resistant layer 43 are relatively high, which facilitates internal air convection and allows debris to fall off quickly, thereby reducing the wear of debris on the cutting teeth 42 and making the drill head 3 last longer.

[0036] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An erosion-resistant PDC drill bit, comprising a shank (1), characterized in that: The top of the handle (1) is fixedly connected to a connecting end (2), the top of the connecting end (2) is fixedly connected to a drill bit (3), the outer wall of the drill bit (3) is fixedly connected to an anti-impact component (4), the outer wall of the drill bit (3) is connected through a connecting nut (5), the outer wall of the connecting end (2) is connected through an exhaust device (6), the exhaust device (6) includes an installation cylinder (61), the outer wall of the connecting end (2) is provided with a groove (7), and the inside of the groove (7) is fixedly connected to an anti-slip end (8).

2. The erosion-resistant PDC drill bit according to claim 1, characterized in that: The inner wall of the handle (1) is provided with a threaded groove (11), and the top of the connecting end (2) is fixedly connected with a plug rod (21).

3. The erosion-resistant PDC drill bit according to claim 1, characterized in that: One end of the mounting cylinder (61) is inserted into the interior of the connecting end (2). The inner wall of the mounting cylinder (61) is provided with a sliding groove (62). An exhaust plate (63) is slidably connected inside the sliding groove (62). A telescopic rod (64) is fixedly connected to one side of the exhaust plate (63). A spring rod (65) is sleeved on one end of the telescopic rod (64). An exhaust pipe (66) is connected through one end of the mounting cylinder (61).

4. The erosion-resistant PDC drill bit according to claim 3, characterized in that: One end of the exhaust pipe (66) is connected to the inner wall of the connecting end (2), and one end of the telescopic rod (64) is fixedly connected to the inside of the mounting cylinder (61).

5. The erosion-resistant PDC drill bit according to claim 1, characterized in that: The drill bit (3) includes a connecting cylinder (31), the top of which is provided with a connecting groove (32), a fixed end (41) is fixedly connected to the outer wall of the connecting cylinder (31), a cutting tooth (42) is fixedly connected to the outer wall of the fixed end (41), and a wear-resistant layer (43) is fixedly connected to the outer wall of the cutting tooth (42).

6. The erosion-resistant PDC drill bit according to claim 5, characterized in that: The cutting teeth (42) are installed on one side of the wear-resistant layer (43), and one end of the connecting groove (32) faces the middle part of the two sets of fixed ends (41).

Images