Petroleum drilling bit convenient to replace

Abstract

The utility model relates to the technical field of petroleum drilling, in particular to a petroleum drilling bit convenient to replace. According to the technical scheme, the petroleum drilling bit convenient to replace comprises a drill rod, a drill bit body and a drill bit fixing piece; the drill bit body is arranged on the drill rod; the drill bit fixing piece is detachably arranged on the drill rod and used for fixing the drill bit body to the drill rod. The utility model provides a petroleum drilling bit convenient to replace. The petroleum drilling bit solves the technical problem that an existing drill bit is prone to falling off when being subjected to rotating force.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling technology, and in particular to an easily replaceable oil drilling bit. Background Technology

[0002] Oil drilling is an exploration project aimed at discovering hydrocarbons such as oil and natural gas. Drilling plays an irreplaceable and important role in the development of the oil and natural gas industry.

[0003] Existing replaceable drill bits used in oil drilling are fixed to the drill pipe by threaded connection. In order to ensure that the drill bit is not affected by rotational force during drilling and thus does not fall off, threadlocker needs to be applied to the threads of the drill bit for fixation.

[0004] However, in actual drilling operations, if the rotational force is too great, even the use of threadlocker can cause the drill bit to fall off. Utility Model Content

[0005] This invention provides an easy-to-replace oil drilling bit, solving the technical problem that existing drill bits are prone to falling off when subjected to rotational force.

[0006] To achieve this technical objective, the present invention adopts the following solution: an easily replaceable oil drilling bit, comprising a drill pipe, a drill bit body, and a drill bit fixing component;

[0007] The drill bit body is mounted on the drill pipe;

[0008] The drill bit holder is detachably mounted on the drill rod and is used to secure the drill bit body to the drill rod.

[0009] Furthermore, the bottom of the drill pipe is provided with external threads, a spline sleeve is embedded in the bottom of the drill pipe, and a guide rod is provided inside the drill pipe;

[0010] The guide rod extends along the axial direction of the drill rod. The upper part of the guide rod is fixedly connected to the drill rod through a connecting plate. The middle part of the guide rod is provided with an annular first top plate, and the lower part of the guide rod is slidably fitted with a clamping assembly.

[0011] Furthermore, the clamping assembly includes a sleeve and a spring;

[0012] The sleeve is slidably fitted on the lower part of the guide rod, and the top of the sleeve is provided with a second top plate corresponding to the first top plate. The bottom of the sleeve and the top of the drill bit body abut against each other.

[0013] The spring is sleeved on the guide rod, and the two ends of the spring abut against the first top plate and the second top plate, respectively.

[0014] Furthermore, the drill bit body is inserted at the bottom of the drill rod, the drill bit body is provided with a spline that mates with the spline sleeve, and an annular baffle is provided in the middle of the drill bit body, the baffle abutting against the bottom of the drill rod.

[0015] Furthermore, the drill bit holder and the bottom of the drill rod are threaded together, the drill bit holder and the baffle abut against each other, and the drill bit body extends out from inside the drill bit holder.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. In this utility model, the drill bit body is fixed to the drill rod by a drill bit fixing component, rather than being directly connected to the drill rod by a thread. This ensures that the rotational force between the drill rod and the drill bit body does not affect the stability of the connection between the drill rod and the drill bit body, thereby preventing the drill bit from falling off.

[0018] 2. The drill bit body and the drill bit are connected by a spline connection. The rotational force between the drill rod and the drill bit body is applied to the spline, not to the threaded connection between the drill bit fixing part and the drill rod, thus further preventing the drill bit body from falling off the drill bit.

[0019] 3. In the non-working state, the clamping component presses the drill bit body downwards, and the drill bit body presses the drill bit fixing component, thereby increasing the friction at the connection between the drill bit fixing component and the drill rod, preventing the drill bit fixing component from loosening, and further preventing the drill bit body from falling off the drill rod. Attached Figure Description

[0020] Figure 1 A schematic diagram of an easily replaceable oil drilling bit provided for an embodiment of this utility model;

[0021] Figure 2 Exploded view of an easily replaceable oil drilling bit provided for an embodiment of this utility model:

[0022] Figure 3 Another schematic diagram of an easily replaceable oil drilling bit provided for an embodiment of this utility model (with the drill pipe set to a transparent state).

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Drill rod; 11. Spline sleeve; 12. Guide rod; 13. Connecting plate; 14. First top plate; 15. External thread; 2. Drill bit body; 21. Spline; 22. Baffle; 3. Drill bit fixing component; 4. Clamping assembly; 41. Sleeve; 42. Spring; 43. Second top plate. Detailed Implementation

[0025] To fully understand the purpose, features and effects of this utility model, the following specific embodiments will be used to describe this utility model in detail, but this utility model is not limited thereto.

[0026] like Figures 1 to 3As shown, this utility model provides an easily replaceable oil drilling bit, including a drill pipe 1, a drill bit body 2, and a drill bit fixing component 3. The drill bit body 2 is mounted on the drill pipe 1; the drill bit fixing component 3 is detachably mounted on the drill pipe 1 and is used to fix the drill bit body 2 to the drill pipe 1.

[0027] Please refer to Figure 2 and Figure 3 The bottom of the drill rod 1 is provided with an external thread 15, and a spline sleeve 11 is embedded in the bottom of the drill rod 1, that is, the spline sleeve 11 is fixed on the drill rod 1. The drill rod 1 is provided with a guide rod 12 inside, and the bottom of the guide rod 12 does not contact the drill bit body 2, and there is a certain gap between the two.

[0028] The guide rod 12 extends along the axial direction of the drill rod 1. The upper part of the guide rod 12 is fixedly connected to the drill rod 1 through the connecting plate 13. The middle part of the guide rod 12 is provided with an annular first top plate 14. A certain space is left between the lower part of the guide rod 12 and the drill rod 1. The lower part of the guide rod 12 is slidably fitted with a clamping component 4. The clamping component 4 can slide up and down along the guide rod 12 in the space between the guide rod 12 and the drill rod 1.

[0029] Please refer to Figure 2 and Figure 3 The clamping assembly 4 includes a sleeve 41 and a spring 42. The sleeve 41 is slidably sleeved on the lower part of the guide rod 12, and the top of the sleeve 41 is provided with a second top plate 43 corresponding to the first top plate 14. The bottom of the sleeve 41 abuts against the top of the drill bit body 2. The spring 42 is sleeved on the guide rod 12, and both ends of the spring 42 abut against the first top plate 14 and the second top plate 43, respectively.

[0030] The drill bit body 2 is inserted at the bottom of the drill rod 1. The drill bit body 2 is provided with a spline 21 that mates with the spline sleeve 11. The drill bit body 2 is provided with an annular baffle 22 in the middle. The baffle 22 is located outside the drill rod 1 and abuts against the bottom of the drill rod 1.

[0031] The drill bit holder 3 can be a cylindrical structure. The drill bit holder 3 is threaded to the bottom of the drill rod 1. The drill bit holder 3 abuts against the baffle 22. The drill bit body 2 extends out from the inside of the drill bit holder 3.

[0032] In use, first insert the drill bit body 2 into the drill rod 1 from the bottom, so that the top of the drill bit body 2 presses against the bottom of the sleeve 41. Then, put the drill bit retainer 3 on the outside of the drill bit body 2, so that the internal thread of the drill bit retainer 3 engages with the external thread 15 at the bottom of the drill rod 1. Continuously tighten the drill bit retainer 3 until it is completely fixed to the bottom of the drill rod 1. At this time, the baffle 22 is limited inside the drill bit retainer 3. In other words, the drill bit retainer 3 abuts against the baffle 22, further fixing the drill bit body 2 to the drill rod 1. In this state, the spring 42 is in a compressed state. By setting the spring 42, the downward pressure of the drill bit body 2 on the drill bit retainer 3 is increased, thereby increasing the friction between the internal thread and the external thread 15 and preventing the drill bit retainer 3 from loosening. When it is necessary to replace the drill bit body 2, simply unscrew the drill bit retainer 3 to replace the drill bit body 2.

[0033] Finally, it should be noted that the above-listed embodiments are merely preferred embodiments of the present invention. Of course, those skilled in the art can make modifications and variations to the present invention. If such modifications and variations fall within the scope of the claims of the present invention and their equivalents, they should be considered as being within the protection scope of the present invention.

Claims

1. A petroleum drilling bit that facilitates replacement, characterized by, Drill rod (1), drill bit body (2) and drill bit fixing part (3) are included. The drill bit body (2) is arranged on the drill rod (1), the bottom of the drill rod (1) is provided with external thread (15), the bottom of the drill rod (1) is embedded with spline sleeve (11), the inside of the drill rod (1) is provided with guide rod (12). The guide rod (12) extends along the axial direction of the drill rod (1), the upper part of the guide rod (12) is fixedly connected with the drill rod (1) through the connecting plate (13), the middle part of the guide rod (12) is provided with annular first top plate (14), the lower part of the guide rod (12) is slidably sleeved with compression assembly (4). The drill bit fixing part (3) is detachably arranged on the drill rod (1), which is used for fixing the drill bit body (2) on the drill rod (1).

2. A petroleum drilling bit of the type described in claim 1 wherein, The compression assembly (4) includes sleeve (41) and spring (42). The sleeve (41) is slidably sleeved on the lower part of the guide rod (12), the top of the sleeve (41) is provided with second top plate (43) corresponding to the first top plate (14), the bottom of the sleeve (41) and the top of the drill bit body (2) abut; The spring (42) is sleeved on the guide rod (12), and the two ends of the spring (42) abut against the first top plate (14) and the second top plate (43) respectively.

3. A petroleum drilling bit of the type described in claim 2 wherein, The drill bit body (2) is inserted into the bottom of the drill rod (1), the drill bit body (2) is provided with spline (21) matched with the spline sleeve (11), the middle part of the drill bit body (2) is provided with annular baffle (22), the baffle (22) and the bottom of the drill rod (1) abut.

4. A drill bit for oil drilling according to claim 3, wherein The drill bit fixing part (3) and the bottom of the drill rod (1) are threadedly connected, the drill bit fixing part (3) and the baffle (22) abut, and the drill bit body (2) extends out from the inside of the drill bit fixing part (3).

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