Directional jet nozzle for PDC (polycrystalline diamond compact) drill bit

Abstract

The utility model relates to the field of PDC drill bits, in particular to a directional jet nozzle for a PDC drill bit, which comprises a column body, mounting blocks, nozzles and a mounting column, the column body is fixed at the upper end of the mounting column, the mounting blocks distributed in an annular array are fixedly welded on the outer surface of the column body, and the nozzles distributed in an annular array are further arranged on the outer surface of the column body. The nozzles and the mounting blocks are alternately designed, and a piston controlled by an elastic element is arranged in the nozzle connecting pipeline. According to the device, the function of automatically spraying oil at a high rotating speed can be utilized, and the problems that oil needs to be supplied through an external device due to the fact that an existing PDC drill bit lacks an effective oil self-adaptive supply effect, and the device is very troublesome and lacks practicability are solved.

Description

Technical Field

[0001] The utility model relates to the field of PDC drill bits, in particular to a directional jet nozzle for a PDC drill bit. Background Art

[0002] PDC drill bit is a tool used for oil and gas drilling. It is known for its excellent wear resistance and high efficiency in underground rocks. The main part of the PDC drill bit is covered by man-made synthetic diamond pieces, which can be used for efficient and long-lasting drilling in different types of geological formations.

[0003] In the existing technology, although a certain PDC drill bit oil supply effect can be achieved during use, there is a defect: the existing PDC drill bit lacks an effective oil adaptive supply effect, resulting in the need to supply oil through an external device, which is very troublesome and lacks practicality. In view of this, we propose a directional jet nozzle for PDC drill bits to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the problems existing in the background technology and proposes a directional jet nozzle for a PDC drill bit.

[0005] The technical solution of the utility model is: a directional jet nozzle for a PDC drill bit, comprising a column, a mounting block, a nozzle and a mounting column, wherein the column is fixed at the upper end of the mounting column, the mounting blocks distributed in a ring array are fixedly welded on the outer surface of the column, and nozzles distributed in a ring array are also arranged on the outer surface of the column, the nozzles and the mounting blocks are alternately designed, and a piston controlled by an elastic element is arranged inside the nozzle connection pipeline;

[0006] When the device is in use, the matching threaded column is first installed on the upper end of the drill bit, and then the device starts to rotate with the drill bit, and feeds downward during rotation to achieve drilling processing. In order to ensure a good cutting effect of the tool during drilling, it needs to be sprayed with oil, which can optimize the hole opening and protect the tool. Specifically, the oil inlet valve is used to inject lubricating oil into the oil tank, and then when the tool rotates, the centrifugal force is used to open the piston with a spring lock, and then the oil enters the fixed position of the nozzle with the help of centrifugal force for directional injection. The oil spraying state will only appear under high speed, thereby achieving optimized hole opening processing. When the speed drops, the spring will rebound and continue to close the oil pipe.

[0007] Preferably, the nozzle is located at the lower end of the mounting block, with a distance of one centimeter from the cross section of the outer wall of the mounting block, and the nozzle is arranged on the inner part of the mounting block.

[0008] Preferably, an oil tank is provided inside the column, an oil inlet valve is provided at the upper end of the column, and the oil inlet valve is communicated with the oil tank.

[0009] Preferably, the surface of the mounting post is provided with an anti-slip texture, and a threaded post is fixedly installed at the lower end of the mounting post.

[0010] Preferably, the mounting block is embedded with cutting tools distributed in a linear array along the extension.

[0011] Preferably, an oil pipe is provided on one side of the nozzle, a mounting groove is provided inside the oil pipe, and the piston is movably installed inside the mounting groove.

[0012] Preferably, a spring is fixedly connected between the piston and the inner wall of the mounting groove, and the spring is in a compressed state.

[0013] Preferably, the mounting block is designed to be twisted at thirty degrees, and a more efficient drilling process is achieved by twisting the mounting block at thirty degrees.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] 1. The utility model can utilize the oil groove and the one-way locking piston driven by the elastic element to realize the opening and closing effect under different rotation speeds, so that the lubricating oil can be automatically supplied during high-speed rotation. The oil is automatically supplied inside the device of the design, which reduces the floor space and increases practicality.

[0016] 2. Based on the first beneficial effect, the device can utilize the overall design of a 30-degree twist to increase the layer-by-layer cutting effect of the cutting knife, and has a more efficient hole-opening effect than a traditional straight-barrel drill bit.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0019] Figure 2 It is a main schematic diagram of the utility model;

[0020] Figure 3 It is a top view schematic diagram of the utility model;

[0021] Figure 4 It is a schematic diagram of the oil tank and piston of the utility model;

[0022] Figure 5 For the utility model Figure 4 A magnified schematic diagram of the structure in the middle.

[0023] Reference numerals:

[0024] 1. Cylinder; 2. Mounting block; 3. Tool; 4. Nozzle; 5. Anti-slip texture; 6. Threaded column; 7. Oil inlet valve; 8. Oil pipe; 9. Oil tank; 10. Mounting column; 11. Spring; 12. Mounting slot; 13. Piston. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0027] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0028] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Example 1

[0030] See also Figure 1-Figure 5 As shown, this embodiment is a directional jet nozzle for a PDC drill bit, comprising a column 1, a mounting block 2, a nozzle 4 and a mounting column 10, wherein the column 1 is fixed to the upper end of the mounting column 10, the mounting blocks 2 arranged in a circular array are fixedly welded to the outer surface of the column 1, and nozzles 4 arranged in a circular array are also arranged on the outer surface of the column 1, the nozzles 4 and the mounting blocks 2 are alternately designed, and a piston 13 controlled by an elastic element is arranged inside the nozzle 4 connecting pipeline;

[0031] When the device is in use, the matching threaded column 6 is first installed on the upper end of the drill bit, and then the device starts to rotate with the drill bit, and feeds downward during rotation to achieve drilling processing. When drilling, in order to ensure a good cutting effect of the tool 3, it needs to be sprayed with oil, which can optimize the hole opening and protect the tool 3. Specifically, the oil inlet valve 7 is used to inject lubricating oil into the oil tank 9, and then when the tool 3 rotates, the centrifugal force is used to open the piston 13 locked by the spring 11, and then the oil enters the fixed position of the nozzle 4 with the help of centrifugal force for directional injection. The oil spraying state will only appear under high speed, thereby achieving the optimization of the hole opening processing. When the speed drops, the spring 11 will rebound and continue to close the oil pipe 8.

[0032] Example 2

[0033] See also Figure 1-Figure 5 As shown, this embodiment is based on the embodiment 1 and also includes: the nozzle 4 is located at the lower end of the mounting block 2, and the distance from the outer wall section of the mounting block 2 is one centimeter. The nozzle 4 is arranged on the inner part of the mounting block 2 to prevent the nozzle 4 from being damaged by contact and friction with the surrounding soil, and the gap can be used to provide sufficient oil supply to the entire surface of the tool 3.

[0034] An oil tank 9 is arranged inside the column 1 , and an oil inlet valve 7 is opened at the upper end of the column 1 . The oil inlet valve 7 is connected to the oil tank 9 , and the oil inlet valve 7 can be used to regularly supply oil to the oil tank 9 .

[0035] The surface of the mounting column 10 is provided with an anti-skid texture 5, and a threaded column 6 is fixedly installed at the lower end of the mounting column 10. The anti-skid texture 5 can facilitate the user to install the device on the drill bit to prevent slipping.

[0036] The mounting block 2 is embedded with cutters 3 distributed in a linear array along the extension. The cutters 3 have a high hardness and can perform efficient grinding and drilling processing on some areas that are difficult to drill holes.

[0037] An oil pipe 8 is provided at one side of the nozzle 4, and a mounting groove 12 is provided inside the oil pipe 8. A piston 13 is movably installed inside the mounting groove 12, and a piston 13 with a one-way lock can be installed inside the mounting groove 12.

[0038] A spring 11 is fixedly connected between the piston 13 and the inner wall of the mounting groove 12. The spring 11 is in a compressed state. The piston 13 will not open if a certain rotation speed is not reached. Only when a certain rotation speed is reached, the spring 11 rebounds, and a gap is created between the piston 13 and the oil pipe 8, and oil will be supplied to the nozzle 4.

[0039] The mounting block 2 is designed to be twisted at 30 degrees, and a more efficient drilling process can be achieved by twisting the mounting block 2 at 30 degrees, which can increase the efficiency by 10% compared to the straight-through type.

[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A directional jet nozzle for a PDC drill bit, comprising a column (1), a mounting block (2), a nozzle (4) and a mounting column (10), characterized in that: A column (1) is fixed at the upper end of the mounting column (10), mounting blocks (2) distributed in a ring array are fixedly welded to the outer surface of the column (1), and nozzles (4) distributed in a ring array are also arranged on the outer surface of the column (1), the nozzles (4) and the mounting blocks (2) are designed alternately, and a piston (13) controlled by an elastic element is arranged inside the nozzle (4) connecting pipeline.

2. A directional jet nozzle for a PDC drill bit according to claim 1, characterized in that: The nozzle (4) is located at the lower end of the mounting block (2) and is one centimeter away from the cross section of the outer wall of the mounting block (2).

3. A directional jet nozzle for a PDC drill bit according to claim 1, characterized in that: An oil groove (9) is arranged inside the column (1), and an oil inlet valve (7) is opened at the upper end of the column (1), and the oil inlet valve (7) is connected to the oil groove (9).

4. A directional jet nozzle for a PDC drill bit according to claim 1, characterized in that: The surface of the installation column (10) is provided with an anti-slip texture (5), and a threaded column (6) is fixedly mounted on the lower end of the installation column (10).

5. A directional jet nozzle for a PDC drill bit according to claim 2, characterized in that: The mounting block (2) is embedded with cutting tools (3) distributed in a linear array along its extension.

6. A directional jet nozzle for a PDC drill bit according to claim 1, characterized in that: An oil pipe (8) is provided on one side of the spray head (4), a mounting groove (12) is provided inside the oil pipe (8), and the piston (13) is movably mounted inside the mounting groove (12).

7. A directional jet nozzle for a PDC drill bit according to claim 6, characterized in that: A spring (11) is fixedly connected between the piston (13) and the inner wall of the mounting groove (12), and the spring (11) is in a compressed state.

8. The directional jet nozzle for a PDC drill bit according to claim 1, characterized in that: The mounting block (2) is designed to be twisted at thirty degrees.

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