Anti-impact PDC drill bit

Abstract

The utility model relates to the technical field of PDC drill bits, and discloses an anti-impact PDC drill bit which comprises a PDC drill bit body, a spraying mechanism is arranged in the PDC drill bit body, an anti-impact mechanism is arranged at the upper end of the PDC drill bit body, and the upper end of the anti-impact mechanism is fixedly connected with a connecting block. The anti-impact mechanism comprises an anti-impact base, an outer protection ring, a connecting column, a sliding block, a spring, a supporting column and a sliding groove, when impact force impacts the drill bit, due to the fact that the material hardness of the supporting column is lower than that of the drill bit, the supporting column can be broken due to the impact force, and therefore no support exists between the connecting column and the anti-impact base; and meanwhile, the impact force is slowly released through the spring, so that the effect of protecting the drill bit is achieved, and the impact resistance effect of the device is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PDC drill bits, in particular to an impact-resistant PDC drill bit. Background Art

[0002] PDC drill bit, or polycrystalline diamond drill bit, is a drill bit widely used in the field of oil and gas drilling. It is composed of many small diamond crystal preforms bonded to a carbide disc. These diamond crystal preforms are designed to withstand the extremely high pressure and wear during the drilling process. The so-called impact-resistant PDC drill bit is particularly emphasized for its ability to withstand the impact load caused by complex formation conditions during the drilling process. This type of drill bit is usually designed to be more robust and have higher toughness to ensure that it will not be damaged when encountering hard or broken formations;

[0003] PDC drill bits are much cheaper than natural diamond drill bits. With the continuous advancement of material technology, PDC drill bits are adapted to more and more strata. New composite pieces can be applied to rock strata with a hardness of grade 10. The cutting teeth of existing PDC drill bits are mostly in one group and have a larger diameter. Therefore, when drilling in harder strata, the geology may be too hard, causing the drill bit to be damaged due to excessive impact force. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an impact-resistant PDC drill bit, which solves the safety problem of insufficient impact resistance of the PDC drill bit.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: an impact-resistant PDC drill bit, comprising a PDC bit body, a spraying mechanism is arranged inside the PDC bit body, an impact-resistant mechanism is arranged on the upper end of the PDC bit body, a connecting block is fixedly connected to the upper end of the impact-resistant mechanism, the impact-resistant mechanism comprises an impact-resistant base, an outer protective ring, a connecting column, a sliding block, a spring, a supporting column and a sliding groove, the lower end of the connecting column is fixedly connected to the upper end of the PDC bit body, the upper end of the connecting column is slidably connected to the outer protective ring, the upper end of the outer protective ring is fixedly connected to the impact-resistant base, a plurality of springs are fixedly connected to the lower surface of the impact-resistant base in a circumferential array, a plurality of supporting columns are fixedly connected to the lower surface of the impact-resistant base in a circumferential array, the supporting column is arranged on the inner side of the spring, and the supporting column and the lower end of the spring are both fixedly connected to the upper surface of the connecting column, and the supporting column is an alloy steel with a Rockwell hardness of about 60.

[0006] Preferably, a plurality of slide grooves are provided in a circumferential array on the inner side of the outer protective ring, a plurality of sliding blocks are fixedly connected in a circumferential array on the outer side of the connecting column, and the slide grooves are slidably connected to adjacent sliding blocks respectively.

[0007] Preferably, an inner groove is provided inside the PDC drill bit body, and through holes are provided through the middle of the PDC drill bit body and the anti-impact mechanism.

[0008] Preferably, the spraying mechanism includes a multi-head jet pump, a spray pipe, a solenoid valve and a water pipe. The multi-head jet pump is fixedly connected to the bottom of the inner tank. The upper end of the multi-head jet pump is penetrated and fixedly connected with a water pipe. The upper end of the water pipe penetrates a through hole and is fixedly connected to an external water pipe.

[0009] Preferably, each output end of the multi-head jet pump is fixedly connected to a spray pipe, and the other end of the spray pipe is fixedly connected to a solenoid valve, and all the solenoid valves are in a circular array and are fixedly connected to the outer side of the PDC drill bit body.

[0010] Preferably, a drill bit is fixedly connected to the lower end of the PDC drill bit body, and a cutting surface is fixedly connected to the outer side of the drill bit.

[0011] Beneficial Effects

[0012] The utility model provides an impact-resistant PDC drill bit. Compared with the prior art, it has the following beneficial effects:

[0013] 1. In the utility model, by setting up the anti-impact mechanism, when the drill bit is working, the support column supports the stability of the entire anti-impact mechanism. If a high-hardness geology is encountered, the hardness of the drill bit is not enough to drill a hole at the address, and its impact force will cause the drill bit to collapse. However, when the impact force hits the drill bit, because the material hardness of the support column is lower than the hardness of the drill bit, the support column will be broken due to the impact force, resulting in a lack of support between the connecting column and the anti-impact base. Therefore, the connecting column slides towards the anti-impact base due to the impact force, and the impact force is released slowly by the spring to protect the drill bit, thereby effectively improving the anti-impact effect of the device;

[0014] 2. In the utility model, by means of the spraying mechanism, when the drill is in use, the cooling liquid will be continuously infused into the interior of the multi-head jet pump through the water pipe. When the drill needs to be cooled, the solenoid valve can be opened, and then the cooling liquid will be sprayed out through each spray pipe, thereby improving the uniform cooling effect. By means of the solenoid valve, the cutting debris can be prevented from entering the interior of the multi-head jet pump when not in use, causing damage and malfunction of the equipment, thereby improving the use effect of the drill. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of an impact-resistant PDC drill bit proposed by the utility model;

[0016] Figure 2A three-dimensional diagram of an impact-resistant PDC drill bit anti-impact mechanism proposed by the utility model;

[0017] Figure 3 This is an internal diagram of an impact-resistant PDC drill bit anti-impact mechanism proposed by the utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of an impact-resistant PDC drill bit spraying mechanism proposed by the utility model.

[0019] Legend:

[0020] 1. PDC drill bit body; 2. Anti-impact mechanism; 201. Anti-impact base; 202. Outer protection ring; 203. Connecting column; 204. Sliding block; 205. Spring; 206. Support column; 207. Slide; 3. Connecting block; 4. Spraying mechanism; 401. Multi-head jet pump; 402. Spraying pipe; 403. Solenoid valve; 404. Water pipe; 5. Drill bit; 6. Cutting surface 7. Through hole; 8. Inner groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4 The utility model provides two technical solutions, which specifically include the following embodiments:

[0023] Embodiment 1:

[0024] A shock-resistant PDC drill bit comprises a PDC drill bit body 1, a spraying mechanism 4 is arranged inside the PDC drill bit body 1, an shock-resistant mechanism 2 is arranged on the upper end of the PDC drill bit body 1, a connecting block 3 is fixedly connected to the upper end of the shock-resistant mechanism 2, the shock-resistant mechanism 2 comprises an shock-resistant base 201, an outer protective ring 202, a connecting column 203, a slider 204, a spring 205, a supporting column 206 and a slide groove 207, the lower end of the connecting column 203 is fixedly connected to the upper end of the PDC drill bit body 1, the upper end of the connecting column 203 is slidably connected to the outer protective ring 202, and the upper end of the outer protective ring 202 is fixedly connected to the shock-resistant base 201, A plurality of springs 205 are fixedly connected in a circular array around the lower surface of the anti-impact base 201. A plurality of support columns 206 are fixedly connected in a circular array around the lower surface of the anti-impact base 201. The support columns 206 are arranged on the inner side of the springs 205, and the lower ends of the support columns 206 and the springs 205 are fixedly connected to the upper surface of the connecting columns 203. The support columns 206 are alloy steel with a Rockwell hardness of about 60. A plurality of slide grooves 207 are provided in a circular array on the inner side of the outer protective ring 202. A plurality of sliders 204 are fixedly connected in a circular array on the outer side of the connecting columns 203. The slide grooves 207 are slidably connected to adjacent sliders 204, respectively.

[0025] During operation, through the anti-impact mechanism 2, when the drill bit is working, the support column 206 supports the stability of the entire anti-impact mechanism 2. If a high-hardness geology is encountered, the hardness of the drill bit 5 is not enough to drill a hole at the address, and its impact force will cause the drill bit 5 to collapse. However, when the impact force hits the drill bit 5, because the material hardness of the support column 206 is lower than the hardness of the drill bit 5, the support column 206 will be broken due to the impact force, resulting in a lack of support between the connecting column 203 and the anti-impact base 201. Therefore, the connecting column 203 slides towards the anti-impact base 201 due to the impact force, and the impact force is slowly released through the spring 205 to protect the drill bit 5, thereby effectively improving the anti-impact effect of the device.

[0026] Embodiment 2:

[0027] On the basis of the first embodiment, an inner groove 8 is provided inside the PDC drill bit body 1, and a through hole 7 is provided in the middle of the PDC drill bit body 1 and the anti-impact mechanism 2. The spraying mechanism 4 includes a multi-head jet pump 401, a spray pipe 402, a solenoid valve 403 and a water pipe 404. The multi-head jet pump 401 is fixedly connected to the bottom of the inner groove 8, and the upper end of the multi-head jet pump 401 is fixedly connected with a water pipe 404, and the upper end of the water pipe 404 is fixedly connected to the through hole 7 and is fixedly connected to the external water pipe. Each output end of the multi-head jet pump 401 is fixedly connected to a spray pipe 402, and the other end of the spray pipe 402 is fixedly connected to a solenoid valve 403. All solenoid valves 403 are fixedly connected to the outer side of the PDC drill bit body 1 in a circular array. The lower end of the PDC drill bit body 1 is fixedly connected to a drill bit 5, and the outer side of the drill bit 5 is fixedly connected to a cutting surface 6;

[0028] By means of the spraying mechanism 4, when the drill is in use, the cooling liquid will be continuously infused into the interior of the multi-head jet pump 401 through the water pipe 404. When the drill needs to be cooled, the solenoid valve 403 can be opened, and then the cooling liquid can be sprayed out through each spray pipe 402, thereby improving the uniform cooling effect. By means of the solenoid valve 403, when not in use, the cutting debris can be prevented from entering the interior of the multi-head jet pump 401 to cause damage and malfunction of the equipment, thereby improving the use effect of the drill.

[0029] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the application should be included in the protection scope of the present application.

Claims

1. An impact-resistant PDC drill bit, comprising a PDC drill bit body (1), characterized in that: A spraying mechanism (4) is arranged inside the PDC drill bit body (1); an anti-impact mechanism (2) is arranged at the upper end of the PDC drill bit body (1); a connecting block (3) is fixedly connected to the upper end of the anti-impact mechanism (2); the anti-impact mechanism (2) comprises an anti-impact base (201), an outer protective ring (202), a connecting column (203), a sliding block (204), a spring (205), a supporting column (206) and a sliding groove (207); the lower end of the connecting column (203) is fixedly connected to the upper end of the PDC drill bit body (1); the connecting column (203) is fixedly connected to the upper end of the PDC drill bit body (1); The upper end of the (203) is slidably connected to an outer protective ring (202), the upper end of the outer protective ring (202) is fixedly connected to an impact-proof base (201), a plurality of springs (205) are fixedly connected to the lower surface of the impact-proof base (201) in a circular array, a plurality of support columns (206) are fixedly connected to the lower surface of the impact-proof base (201) in a circular array, the support columns (206) are arranged on the inner side of the springs (205), and the lower ends of the support columns (206) and the springs (205) are fixedly connected to the upper surface of the connecting column (203).

2. The impact-resistant PDC drill bit according to claim 1, characterized in that: The inner side of the outer protective ring (202) is provided with a plurality of slide grooves (207) in a circumferential array, the outer side of the connecting column (203) is fixedly connected with a plurality of sliders (204) in a circumferential array, and the slide grooves (207) are respectively slidably connected to adjacent sliders (204).

3. The impact-resistant PDC drill bit according to claim 1, characterized in that: An inner groove (8) is provided inside the PDC drill bit body (1), and a through hole (7) is provided through the middle of the PDC drill bit body (1) and the anti-impact mechanism (2).

4. The impact-resistant PDC drill bit according to claim 1, characterized in that: The spraying mechanism (4) comprises a multi-head jet pump (401), a spraying pipe (402), a solenoid valve (403) and a water pipe (404); the multi-head jet pump (401) is fixedly connected to the inner bottom of the inner tank (8); the upper end of the multi-head jet pump (401) is penetrated and fixedly connected with the water pipe (404); the upper end of the water pipe (404) penetrates the through hole (7) and is fixedly connected to the external water pipe.

5. The impact-resistant PDC drill bit according to claim 4, characterized in that: Each output end of the multi-head jet pump (401) is fixedly connected to a spray pipe (402), and the other end of the spray pipe (402) is fixedly connected to a solenoid valve (403). All the solenoid valves (403) are arranged in a circular array and are fixedly connected to the outer side of the PDC drill bit body (1) through all four sides.

6. The impact-resistant PDC drill bit according to claim 1, characterized in that: A drill bit (5) is fixedly connected to the lower end of the PDC drill bit body (1), and a cutting surface (6) is fixedly connected to the outer side of the drill bit (5).

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