High performance pdc bit

Abstract

This utility model discloses a high-efficiency PDC drill bit, relating to the field of drill bit technology. The high-efficiency PDC drill bit includes a drill bit body and a drill rod disposed on the surface of the drill bit body. The surface of the drill rod is fixedly provided with a plurality of cutting teeth. A first cutting groove is fixedly provided on one side of the surface of each cutting tooth, and a second cutting groove is fixedly provided in the middle of the surface of each cutting tooth. Through the arrangement of the first, second, and third cutting grooves, during drilling and cutting, the drill rod drives the cutting teeth to cut. The first, second, and third cutting grooves form three ridges, reducing the contact area between the drill bit body and the wellbore, increasing the specific pressure on each single cutting tooth, making it easier for the drill bit body to penetrate the formation, and allowing for three simultaneous cuts. The three smooth, wavy protrusions form a continuous, smoothly transitioning fracture surface, making the rock fracturing process more continuous and efficient.

Description

Technical Field

[0001] This utility model relates to the field of drill bit technology, specifically to a high-efficiency PDC drill bit. Background Technology

[0002] PDC composite drill bits are short for polycrystalline diamond composite (PDC) drill bits. They consist of polycrystalline diamond cutting blocks inlaid or sintered into the drill bit body and are mainly used for drilling operations in soft to medium-hard formations. Their cutting teeth achieve efficient rock breaking through the diamond composite blocks.

[0003] Utility model patent CN208184666U discloses a PDC drill bit. The advantages and positive effects of this PDC drill bit are as follows: The PDC drill bit provided by this utility model has a rotatable vibration device that can rotate during the operation of the PDC drill bit. The vibrating teeth can contact and compress the formation to pre-fracture the rock, thereby improving working efficiency. Furthermore, due to the presence of these vibrating teeth, the vibration device intermittently contacts the formation during rotation, causing the PDC drill bit to vibrate, which reduces frictional heat generation and extends the service life of the PDC drill bit.

[0004] However, this PDC drill bit has only one cutting groove on its cutting teeth, making it difficult to drill into the soil layer and resulting in low efficiency. In addition, it is not easy to accelerate the water flow out of the drill bit, and the slow water flow speed will affect the removal of rock cuttings. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency PDC drill bit to solve the problems mentioned in the background art, such as the cutting teeth having only one cutting pattern, making it difficult to drill into the soil layer, resulting in low efficiency. In addition, it is not convenient to accelerate the water flow out of the drill bit, and the slow water flow speed will affect the rock cuttings removal effect.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency PDC drill bit, comprising a drill bit body, and further comprising: a drill tooth rod disposed on the surface of the drill bit body, wherein a plurality of cutting teeth are fixedly disposed on the surface of the drill tooth rod, a first cutting pattern is fixedly disposed on one side of the surface of the cutting teeth, a second cutting pattern is fixedly disposed in the middle of the surface of the cutting teeth, and a third cutting pattern is fixedly disposed on the other side of the surface of the cutting teeth; a connector disposed at the bottom of the drill bit body, wherein a water inlet channel is provided inside the connector, one end of the water inlet channel is connected to a first jet channel, one end of the first jet channel is connected to a second jet channel, and one end of the second jet channel is connected to a bifurcated water outlet channel.

[0007] As a preferred embodiment of this utility model, a long reinforcing rib is fixedly provided on one side of the surface of the drill rod, and a short reinforcing rib is fixedly provided on the other side of the surface of the drill rod. The long and short reinforcing ribs are used to strengthen the edge of the drill rod.

[0008] As a preferred technical solution of this utility model, a number of reinforcing rings are fixedly provided on the surface of the drill bit body. The two ends of the reinforcing rings are fixedly connected to long reinforcing ribs and short reinforcing ribs, respectively, and the reinforcing rings further strengthen the drill bit rod.

[0009] As a preferred embodiment of this utility model, the bottom surface of the connector is threaded with a drill collar, and the edge of the top surface of the drill collar is provided with a sealing groove, so that the drill collar can be easily connected to the connector.

[0010] As a preferred embodiment of this utility model, a metal sealing ring is fixedly provided on the bottom surface of the connector. The metal sealing ring is inserted into the inside of the sealing groove and is used to seal the connection between the connector and the drill collar.

[0011] As a preferred technical solution of this utility model, the number of cutting teeth is several, and the several cutting teeth are arranged in a ring array from top to bottom. The cutting teeth are used for cutting and drilling.

[0012] As a preferred embodiment of this utility model, the bifurcated water outlet channels are arranged in five groups in a circular array, and the bifurcated water outlet channels extend to the top surface of the drill bit body. The bifurcated water outlet channels are used to eject water flow.

[0013] As a preferred technical solution of this utility model, the number of drill rods is four sets, and the four sets of drill rods are distributed in a ring array, which facilitates rotary drilling.

[0014] As a preferred embodiment of this utility model, the long reinforcing rib and the short reinforcing rib are made of tungsten carbide, and the surface of the connector is provided with NC threads, which make the connector firmly connected.

[0015] Compared with the prior art, this utility model provides a high-efficiency PDC drill bit, which has the following beneficial effects:

[0016] 1. This high-efficiency PDC drill bit, through the setting of the first, second and third cutting grooves, allows the drill rod to drive the cutting teeth to cut during the cutting and drilling process. The first, second and third cutting grooves form three edges, which reduce the contact area between the drill bit body and the well, increase the specific pressure on the single cutting tooth, and make it easier for the drill bit body to penetrate the formation. It can also perform three cuts at the same time. The three smooth wavy protrusions form a continuous and smooth transition of the fracture surface, making the rock fracture process more continuous and efficient.

[0017] 2. This high-efficiency PDC drill bit, through the setting of the first jet channel and the second jet channel, after the water source is introduced into the water inlet channel, the flow velocity increases when it passes through the throat of the first jet channel, and then enters the second jet channel. The second jet channel is also equipped with a constricting throat, which makes the water flow accelerated a second time and ejected from the bifurcated water outlet channel, resulting in a stronger impact force on the rock cuttings at the bottom of the well and more effectively removing rock cuttings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the drill rod structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the short reinforcing rib structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the cutting tooth structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the first jet channel and the second jet channel of this utility model;

[0023] Figure 6 This is a schematic diagram of the connector structure of this utility model.

[0024] In the diagram: 1. Drill bit body; 2. Drill rod; 3. Cutting teeth; 4. First cutting groove; 5. Second cutting groove; 6. Third cutting groove; 7. Connector; 8. Water inlet channel; 9. First jet channel; 10. Second jet channel; 11. Branched water outlet channel; 12. Long reinforcing rib; 13. Short reinforcing rib; 14. Reinforcing ring; 15. Drill collar; 16. Metal sealing ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-6This utility model discloses a high-efficiency PDC drill bit, including a drill bit body 1 and a drill rod 2 disposed on the surface of the drill bit body 1. A plurality of cutting teeth 3 are fixedly disposed on the surface of the drill rod 2. A first cutting pattern 4 is fixedly disposed on one side of the surface of the cutting teeth 3, a second cutting pattern 5 is fixedly disposed in the middle of the surface of the cutting teeth 3, and a third cutting pattern 6 is fixedly disposed on the other side of the surface of the cutting teeth 3. With the arrangement of the first cutting pattern 4, the second cutting pattern 5 and the third cutting pattern 6, when the drill bit body 1 cuts and drills, the drill rod 2 drives the cutting teeth 3 to cut. The first cutting pattern 4, the second cutting pattern 5 and the third cutting pattern 6 form three edges, which reduces the contact area between the drill bit body 1 and the well, increases the specific pressure on the single cutting tooth 3, makes it easier for the drill bit body 1 to penetrate the formation, and can perform three cuts at the same time. The three smooth wavy protrusions form a continuous and smooth transition fracture surface, making the rock crushing process more continuous and efficient.

[0027] A connector 7 is located at the bottom of the drill bit body 1. The connector 7 has an inlet channel 8 inside. One end of the inlet channel 8 is connected to a first jet channel 9, and one end of the first jet channel 9 is connected to a second jet channel 10. One end of the second jet channel 10 is connected to a branched outlet channel 11. With the setting of the first jet channel 9 and the second jet channel 10, after the water source is introduced into the inlet channel 8, the flow velocity increases when it passes through the throat of the first jet channel 9, and then enters the second jet channel 10. The second jet channel 10 is also equipped with a constricting throat, which makes the water flow accelerated a second time and ejected from the branched outlet channel 11. The impact force on the rock cuttings at the bottom of the well is stronger, and the rock cuttings can be removed more effectively.

[0028] Specifically, a long reinforcing rib 12 is fixedly provided on one side of the surface of the drill rod 2, and a short reinforcing rib 13 is fixedly provided on the other side of the surface of the drill rod 2.

[0029] In this embodiment, the long reinforcing rib 12 and the short reinforcing rib 13 are used to reinforce the joint between the drill rod 2 and the drill body 1.

[0030] Specifically, several sets of reinforcing rings 14 are fixedly provided on the surface of the drill bit body 1, and the two ends of the reinforcing rings 14 are fixedly connected to the long reinforcing ribs 12 and the short reinforcing ribs 13 respectively.

[0031] In this embodiment, the reinforcing ring 14 is used to further strengthen the drill rod 2.

[0032] Specifically, the bottom surface of the connector 7 is threaded with a drill collar 15, and a sealing groove is provided on the edge of the top surface of the drill collar 15.

[0033] In this embodiment, the drill collar 15 is used to connect to the connector 7.

[0034] Specifically, a metal sealing ring 16 is fixedly provided on the bottom surface of the connector 7, and the metal sealing ring 16 is inserted into the inside of the sealing groove.

[0035] In this embodiment, the metal sealing ring 16 is used to seal the connection between the connector 7 and the drill collar 15.

[0036] Specifically, there are several cutting teeth 3, which are arranged in a circular array from top to bottom.

[0037] In this embodiment, the cutting tooth 3 is used for drilling cutting.

[0038] Specifically, the branched water outlet channels 11 are arranged in five groups in a ring array, and the branched water outlet channels 11 extend to the top surface of the drill bit body 1.

[0039] In this embodiment, the branched water outlet channel 11 is used to remove rock debris.

[0040] Specifically, there are four sets of drill rods 2, which are arranged in a circular array.

[0041] In this embodiment, the drill rod 2 works in conjunction with the cutting teeth 3 to perform drilling and cutting.

[0042] Specifically, the long reinforcing rib 12 and the short reinforcing rib 13 are made of tungsten carbide, and the surface of the connector 7 is provided with NC threads.

[0043] In this embodiment, NC threads are used to improve the connection strength of the drill body 1.

[0044] The working principle and usage process of this utility model are as follows: the drill bit body 1 is connected to the drill collar 15, the metal sealing ring 16 is used to seal the connection, and the long reinforcing rib 12, the short reinforcing rib 13 and the reinforcing ring 14 are used to improve the overall strength of the drill rod 2.

[0045] When the drill bit body 1 is cutting and drilling, the drill rod 2 drives the cutting teeth 3 to cut. The first cutting pattern 4, the second cutting pattern 5 and the third cutting pattern 6 form three edges, which reduce the contact area between the drill bit body 1 and the well, increase the specific pressure on the single cutting tooth 3, make it easier for the drill bit body 1 to penetrate the formation, and can perform three cuts at the same time. The three smooth wavy protrusions form a continuous and smooth transition of the fracture surface, making the rock crushing process more continuous and efficient.

[0046] After the water source is introduced into the inlet channel 8, the flow velocity increases when it passes through the throat of the first jet channel 9, and then enters the second jet channel 10. The second jet channel 10 is equipped with a constricting throat, which accelerates the water flow a second time and ejects it from the branch outlet channel 11. This results in a stronger impact on the rock cuttings at the bottom of the well and more effectively removes the rock cuttings.

[0047] In summary, this high-efficiency PDC drill bit connects the drill body 1 to the drill collar 15. The metal sealing ring 16 is used to seal the connection. The long reinforcing rib 12, the short reinforcing rib 13, and the reinforcing ring 14 are used to improve the overall strength of the drill rod 2. When the drill body 1 is cutting and drilling, the drill rod 2 drives the cutting teeth 3 to cut. The first cutting groove 4, the second cutting groove 5, and the third cutting groove 6 form three cutting edges. After the water source is introduced into the water inlet channel 8, the flow velocity increases when it passes through the throat of the first jet channel 9 and then enters the second jet channel 10. The second jet channel 10 is equipped with a constricting throat, which accelerates the water flow a second time and ejects it from the bifurcated water outlet channel 11.

[0048] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high performance PDC bit comprising a bit body (1) characterised in that, Also includes: A drill rod (2) is provided on the surface of the drill bit body (1). Several cutting teeth (3) are fixedly provided on the surface of the drill rod (2). A first cutting pattern (4) is fixedly provided on one side of the surface of the cutting teeth (3). A second cutting pattern (5) is fixedly provided in the middle of the surface of the cutting teeth (3). A third cutting pattern (6) is fixedly provided on the other side of the surface of the cutting teeth (3). A connector (7) is provided at the bottom of the drill bit body (1). A water inlet channel (8) is provided inside the connector (7). One end of the water inlet channel (8) is connected to a first jet channel (9). One end of the first jet channel (9) is connected to a second jet channel (10). One end of the second jet channel (10) is connected to a bifurcated water outlet channel (11).

2. The high performance PDC bit of claim 1, wherein: A long reinforcing rib (12) is fixedly provided on one side of the surface of the drill rod (2), and a short reinforcing rib (13) is fixedly provided on the other side of the surface of the drill rod (2).

3. The high performance PDC bit of claim 2, wherein: The surface of the drill bit body (1) is fixedly provided with several sets of reinforcing rings (14), and the two ends of the reinforcing rings (14) are fixedly connected to the long reinforcing ribs (12) and the short reinforcing ribs (13) respectively.

4. The high performance PDC bit of claim 1, wherein: The bottom surface of the connector (7) is threaded with a drill collar (15), and a sealing groove is provided on the edge of the top surface of the drill collar (15).

5. The high performance PDC bit of claim 4, wherein: A metal sealing ring (16) is fixedly provided on the bottom surface of the connector (7), and the metal sealing ring (16) is inserted into the inside of the sealing groove.

6. The high performance PDC bit of claim 1, wherein: The number of cutting teeth (3) is several, and the several cutting teeth (3) are arranged in a ring array from top to bottom.

7. The high-efficiency PDC drill bit according to claim 1, characterized in that: The bifurcated water outlet channels (11) are in five groups and arranged in a ring array, and the bifurcated water outlet channels (11) extend to the top surface of the drill bit body (1).

8. The high-efficiency PDC drill bit according to claim 1, characterized in that: The number of drill rods (2) is four sets, and the four sets of drill rods (2) are arranged in a ring array.

9. The high-efficiency PDC drill bit according to claim 2, characterized in that: The long reinforcing rib (12) and short reinforcing rib (13) are made of tungsten carbide, and the surface of the connector (7) is provided with NC threads.

Images