Petroleum drilling bit with self-cleaning function

Abstract

The utility model relates to the technical field of drill bits, and discloses a petroleum drilling drill bit with a self-cleaning function, the petroleum drilling drill bit comprises a drilling drill bit body, a connector and three groups of cutting teeth, the connector is fixedly mounted at the top of the drilling drill bit body, and the three groups of cutting teeth are fixedly mounted at the bottom of the drilling drill bit body and are uniformly distributed; the drilling bit body, the connector and the three sets of cutting teeth are integrally cast and formed, a water distribution cavity is formed in the drilling bit body, a first water channel is formed in the inner wall of the top of the water distribution cavity, a second water channel is formed in the connector and communicates with the first water channel, and a plurality of first grooves which are evenly distributed are formed in the outer side wall of the drilling bit body. The inner wall of one side of each first groove is provided with a first flow dividing channel. The drilling bit has the following advantages and effects that all-directional and multi-direction water spraying of the drilling bit body and the three sets of cutting teeth can be achieved, the efficient self-cleaning effect is achieved, and it is guaranteed that drilling operation is continuously and stably carried out.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of drill bits, in particular to an oil drilling drill bit with a self-cleaning function. BACKGROUND

[0002] During oil drilling, the drill bit as a core component directly affects the efficiency and cost of drilling operation. During drilling, a large amount of rock cuttings is generated by the drill bit cutting rock, and the rock cuttings are easily attached to the drill bit cutting teeth and the drill bit surface. The rock cutting accumulation not only increases the frictional resistance when the drill bit rotates, causes the drill bit to wear out more severely, shortens the service life of the drill bit, but also reduces the cutting efficiency of the drill bit, increases the drilling energy consumption and prolongs the drilling operation time.

[0003] At present, the traditional oil drilling drill bit usually relies on a simple water spraying structure to clean the drill bit. The water flow is unevenly distributed, it is difficult to comprehensively and effectively flush each part of the drill bit, the cleaning effect is poor, and it is difficult to meet the efficient and stable modern oil drilling operation requirements.

[0004] Therefore, the application provides an oil drilling drill bit with a self-cleaning function to solve the above problems. CONTENT OF THE INVENTION

[0005] The application aims to provide an oil drilling drill bit with a self-cleaning function, which can realize omnidirectional and multidirectional water spraying on the drill bit body and three groups of cutting teeth, realize efficient self-cleaning, and ensure the effect of continuous and stable drilling operation.

[0006] The above technical purpose of the application is achieved by the following technical scheme: an oil drilling drill bit with a self-cleaning function, comprising a drill bit body, a connecting head and three groups of cutting teeth, the connecting head is fixedly installed at the top of the drill bit body, the three groups of cutting teeth are fixedly installed at the bottom of the drill bit body and are uniformly distributed, the drill bit body, the connecting head and the three groups of cutting teeth are integrally cast into shape, a water distribution cavity is formed in the drill bit body, a water channel one is formed in the inner wall of the top of the water distribution cavity, a water channel two is formed in the connecting head, the water channel two is in communication with the water channel one, a plurality of recesses one are formed in the outer side wall of the drill bit body and are uniformly distributed, a shunt channel one is formed in the inner wall of one side of each of the plurality of recesses one, each of the plurality of shunt channels one is in communication with the water distribution cavity, and a spray head one is fixedly installed in each of the plurality of recesses one.

[0007] The application further provides that the spray head one comprises a spray head seat and a semicircular spray head body, the spray head seat is fixedly installed in the recess one, a water inlet hole is formed in the side of the spray head seat close to the shunt channel one, and the semicircular spray head body is fixedly installed in the side of the spray head seat away from the shunt channel one.

[0008] The outer surface of the semicircular nozzle body is sprayed with a tungsten carbide coating.

[0009] The bottom of the drilling bit body is provided with three recesses two arranged in an equidistant annular manner, the top inner walls of the three recesses two are each provided with a shunt passage two, the three shunt passages two are each in communication with the water distribution cavity, and the three recesses two are each fixedly provided with a nozzle two.

[0010] The nozzle two is provided in the same structure as the nozzle one.

[0011] The notch of the recess one and the notch of the recess two are both trumpet-shaped.

[0012] The water channel one is fixedly provided with a one-way valve.

[0013] The bottom inner wall of the water distribution cavity is provided with a water injection hole one at the center, and a plurality of water injection holes two are provided on the bottom inner wall of the water distribution cavity and arranged in an inclined manner, and the plurality of water injection holes two are arranged in an equidistant annular manner around the water injection hole one.

[0014] The present application has at least one of the following beneficial technical effects:

[0015] 1. The water channel one, the water channel two, the water distribution cavity, the plurality of shunt passages one, the plurality of recesses one, the plurality of nozzles one, the three recesses two, the three shunt passages two and the three nozzles two are used in cooperation to realize omnidirectional and multidirectional water injection on the drilling bit body and the three groups of cutting teeth, realize efficient self-cleaning effect, and ensure continuous and stable drilling operation.

[0016] 2. The water injection hole one and the plurality of water injection holes two arranged in an inclined manner can downwardly and obliquely spray water flow to flush the bottom and the surrounding rock debris of the oil drilling bit.

[0017] 3. The tungsten carbide coating is sprayed on the outer surface of the nozzle one, which has the characteristics of high hardness, high wear resistance and good chemical stability, enhances the wear resistance and corrosion resistance of the nozzle one, reduces the damage of long-term water flow flushing and rock debris friction to the nozzle one, prolongs the service life of the nozzle one, and further ensures the long-term stable work of the water injection system, indirectly prolongs the service life of the entire oil drilling bit. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a front view of the structure of the embodiment.

[0019] Figure 2 is a bottom view of the structure of the embodiment.

[0020] Figure 3 is a schematic diagram of the main view of the embodiment.

[0021] Figure 4 is a schematic diagram of the three-dimensional structure of the spray head one.

[0022] In the figure, 1, drill bit body; 2, connecting head; 3, cutting tooth; 4, water distribution cavity; 5, water channel one; 6, water channel two; 7, groove one; 8, shunt passage one; 9, spray head one; 91, spray head seat; 92, semicircular spray head body; 93, water inlet hole; 10, groove two; 11, shunt passage two; 12, spray head two; 13, one-way valve; 14, water jet hole one; 15, water jet hole two. DETAILED DESCRIPTION

[0023] The technical solutions of the present application will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the present application provides a petroleum drilling bit with self-cleaning function, comprising a drill bit body 1, a connecting head 2 and three groups of cutting teeth 3, the connecting head 2 is fixedly installed at the top of the drill bit body 1, the three groups of cutting teeth 3 are fixedly installed at the bottom of the drill bit body 1 and are evenly distributed, the drill bit body 1, the connecting head 2 and the three groups of cutting teeth 3 are integrally cast into shape, the design of integrally cast into shape reduces the connecting gaps between each part, enhances the overall structural strength and stability, so that it can withstand greater pressure and impact force under complex drilling conditions, reduces the risk of damage to the petroleum drilling bit caused by structural problems, and improves the safety and reliability of drilling operations.

[0025] In the embodiment, the water distribution cavity 4 is arranged in the drilling bit body 1, the water channel one 5 is arranged on the top inner wall of the water distribution cavity 4, the water channel two 6 is arranged in the connecting head 2, the water channel two 6 is communicated with the water channel one 5, a plurality of recesses one 7 are arranged on the outer side wall of the drilling bit body 1 in a uniform distribution, a plurality of shunt channels one 8 are arranged on the inner wall of one side of the plurality of recesses one 7, the plurality of shunt channels one 8 are communicated with the water distribution cavity 4, a plurality of nozzles one 9 are fixedly installed in the plurality of recesses one 7, the shunt channels one 8 can guide the clean water in the water distribution cavity 4 to the recesses one 7, so that the water is sprayed from the nozzles one 9, thereby the outer side wall surface of the drilling bit body 1 and the cutting teeth 3 can be self-cleaned by water spraying, under the synergistic effect of the plurality of shunt channels one 8, the plurality of recesses one 7 and the plurality of nozzles one 9, the outer side wall surface of the drilling bit body 1 and the three groups of cutting teeth 3 is fully self-cleaned by water spraying, the rock debris and dirt adhered to the outer side wall of the drilling bit body 1 and the three groups of cutting teeth 3 is effectively cleaned, the rock debris accumulation affecting the drilling efficiency is avoided, and the drilling operation is continuously and stably carried out.

[0026] In the embodiment, the nozzle one 9 comprises a nozzle seat 91 and a semicircular nozzle body 92, the nozzle seat 91 is fixedly installed in the recess one 7, the nozzle seat 91 is arranged with a water inlet hole 93 on the side close to the shunt channel one 8, and the semicircular nozzle body 92 is fixedly installed on the side of the nozzle seat 91 away from the shunt channel one 8, the design of the semicircular nozzle body 92 can increase the range of water spraying.

[0027] In the embodiment, the outer surface of the semicircular nozzle body 92 is sprayed with a tungsten carbide coating, by spraying the tungsten carbide coating on the outer surface of the nozzle one 9, the wear resistance and corrosion resistance of the nozzle one 9 are enhanced by the characteristics of high hardness, high wear resistance and good chemical stability, the damage of the nozzle one 9 caused by long-term water flow erosion and rock debris friction is reduced, the service life of the nozzle one 9 is prolonged, thereby the long-term stable work of the water spraying system is ensured, and the service life of the whole petroleum drilling bit is indirectly improved.

[0028] In the embodiment, the bottom of the drilling bit body 1 is arranged with three recesses two 10 in an equidistant annular distribution, the top inner wall of the three recesses two 10 is arranged with a shunt channel two 11, the three shunt channels two 11 are communicated with the water distribution cavity 4, the three recesses two 10 are fixedly installed with nozzles two 12, the nozzles two 12 are arranged in the same structure as the nozzles one 9, under the synergistic effect of the three shunt channels two 11, the three recesses two 10 and the three nozzles two 12, the bottom surface of the drilling bit body 1 and the three groups of cutting teeth 3 is fully self-cleaned by water spraying, the rock debris and dirt adhered to the bottom of the drilling bit body 1 and the three groups of cutting teeth 3 is effectively cleaned, the rock debris accumulation affecting the drilling efficiency is avoided, and the drilling operation is continuously and stably carried out.

[0029] The notch of the groove one 7 and the notch of the groove two 10 are both trumpet-shaped in this embodiment, and the trumpet-shaped design helps to guide the water flow to spread more evenly and widely, increases the water flow coverage area, and improves the cleaning effect of the water flow on the surface of the oil drilling bit.

[0030] In this embodiment, a one-way valve 13 is fixedly installed in the water channel one 5, and the design of the one-way valve 13 prevents water flow from flowing back, ensures the water flow to flow in the predetermined direction, stabilizes the water supply pressure, and guarantees the normal operation and cleaning effect of the water spraying system.

[0031] In this embodiment, a water spraying hole one 14 is arranged at the center of the bottom inner wall of the water distribution cavity 4, and a plurality of water spraying holes two 15 are arranged on the bottom inner wall of the water distribution cavity 4 in a tilted manner, and the plurality of water spraying holes two 15 are distributed in a ring shape at equal intervals around the water spraying hole one 14. The design of the water spraying hole one 14 and the plurality of water spraying holes two 15 can spray water flow downward and obliquely to flush the bottom and the surrounding rock debris of the oil drilling bit.

[0032] Through the above structure, the working principle of the oil drilling bit with self-cleaning function provided by the present application is as follows:

[0033] In the oil drilling operation, when the oil drilling bit starts to work, the external water source flows into the water distribution cavity 4 of the drilling bit body 1 through the water channel two 6 in the connecting head 2 and the water channel one 5, because the one-way valve 13 is arranged in the water channel one 5, the water flow can only flow in one direction, which ensures the stability of the water supply pressure and prevents backflow interference.

[0034] The water flow flowing into the water distribution cavity 4 can achieve self-cleaning effect through multiple paths. Firstly, the water flow vertically downwardly sprays out through the water spraying hole one 14 at the center of the bottom of the water distribution cavity 4, directly flushing the bottom of the drilling bit body 1 to clean the accumulated rock debris, and the water flow sprays out obliquely through the plurality of water spraying holes two 15, which expands the cleaning range of the bottom and prevents the rock debris from accumulating at the bottom of the bit. Secondly, the water flow in the water distribution cavity 4 enters the plurality of grooves one 7 through the plurality of shunt channels one 8, and then sprays out through the plurality of spray heads one 9, which can make the water flow spread evenly and widely, effectively flushing the side wall of the drilling bit body 1 and the outer surface of the three sets of cutting teeth 3 to remove the attached rock debris and dirt. Thirdly, the water flow in the water distribution cavity 4 enters the three grooves two 10 through the three shunt channels two 11, and then sprays out through the three spray heads two 12 which are the same as the spray heads one 9, which can clean the bottom of the three sets of cutting teeth 3 and the bottom peripheral area of the drilling bit body 1, further ensuring that there is no rock debris remaining in the key parts of the oil drilling bit. Further, it can realize omnidirectional and multidirectional water spraying, and achieve the effect of efficient self-cleaning, which guarantees the continuous and stable drilling operation.

Claims

1. An oil drilling bit with self-cleaning function, characterized in that, The drill bit includes a drill bit body (1), a connector (2), and three sets of cutting teeth (3). The connector (2) is fixedly installed on the top of the drill bit body (1), and the three sets of cutting teeth (3) are all fixedly installed on the bottom of the drill bit body (1) and are evenly distributed. The drill bit body (1), connector (2), and three sets of cutting teeth (3) are integrally cast. A water distribution cavity (4) is provided inside the drill bit body (1), and the top inner wall of the water distribution cavity (4) is provided with... There is a water channel 1 (5), and a water channel 2 (6) is provided in the connector (2). The water channel 2 (6) is connected to the water channel 1 (5). Multiple evenly distributed grooves 1 (7) are provided on the outer side wall of the drilling bit body (1). A diversion channel 1 (8) is provided on one side inner wall of each of the multiple grooves 1 (7). The multiple diversion channels 1 (8) are connected to the water distribution chamber (4). A nozzle 1 (9) is fixedly installed in each of the multiple grooves 1 (7).

2. The oil drilling bit with self-cleaning function according to claim 1, characterized in that: The nozzle one (9) includes a nozzle seat (91) and a semi-circular nozzle body (92). The nozzle seat (91) is fixedly installed in the groove one (7). The nozzle seat (91) has a water inlet hole (93) on the side near the diversion channel one (8). The semi-circular nozzle body (92) is fixedly installed on the side of the nozzle seat (91) away from the diversion channel one (8).

3. The oil drilling bit with self-cleaning function according to claim 2, characterized in that: The outer surface of the semi-circular nozzle body (92) is coated with a tungsten carbide coating.

4. The oil drilling bit with self-cleaning function according to claim 2, characterized in that: The bottom of the drilling bit body (1) has three equally spaced annular grooves (10), and the top inner walls of the three grooves (10) are provided with diversion channels (11). The three diversion channels (11) are connected to the water distribution chamber (4), and nozzles (12) are fixedly installed in the three grooves (10).

5. The oil drilling bit with self-cleaning function according to claim 4, characterized in that: The second nozzle (12) has the same structure as the first nozzle (9).

6. The oil drilling bit with self-cleaning function according to claim 4, characterized in that: The openings of the first groove (7) and the second groove (10) are both trumpet-shaped.

7. The oil drilling bit with self-cleaning function according to claim 1, characterized in that: A one-way valve (13) is fixedly installed inside the water channel (5).

8. The oil drilling bit with self-cleaning function according to claim 1, characterized in that: The bottom inner wall of the water distribution cavity (4) is provided with a water spray hole 1 (14) and a plurality of inclined water spray holes 2 (15) are provided on the bottom inner wall of the water distribution cavity (4). The plurality of water spray holes 2 (15) are distributed in a ring with equal spacing around the water spray hole 1 (14).

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