Spinning type high-pressure abrasive jet drill bit

Abstract

The utility model discloses a self-rotating type high-pressure abrasive jet drill bit, and belongs to the technical field of drilling tools. The drill bit comprises a cutterhead, a middle connector and a base, the cutterhead is detachably connected with the middle connector, and the middle connector is detachably connected with the base. At least two high-pressure driving nozzles, at least one high-pressure jet nozzle and cutting picks are arranged on the cutter head, the cutting picks are annularly arranged on the cutter head, the high-pressure driving nozzles are mounted at the edge of the cutter head, and the water jet direction is the tangential direction of the circular edge and is clockwise or anticlockwise. The water jet direction of the high-pressure jet nozzle is the front, and the high-pressure jet nozzle is located on different cutter disc circular faces and can conduct full-section cutting on the front rock mass so as to be matched with cutting teeth to cut the rock mass. A bearing mounting seat, a high-pressure water driving inlet and a high-pressure water jet inlet are arranged on the base; and corresponding water flow channels are arranged in the middle connecting body and the base. The drill bit can achieve self-rotation, rock mass can be rapidly broken, and the drilling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drilling tool technical field, concretely relates to a self-rotating high-pressure abrasive jet drill bit. BACKGROUND

[0002] In the coal mine and stone industry, roadway mining, roadway tunneling, coal mining roadway support, rock mining and the like need to drill rock or hard mineral to realize special purposes, for example, used for gas advanced drainage in the downhole recovery working face crossheading tunneling, used for coal seam rock burst prevention and other geotechnical engineering construction drilling and pressure relief rock breaking. Abrasive jet refers to the jet formed by abrasive under the action of certain external force after being accelerated, and the material is removed by the high-speed erosion of abrasive particles, which is a new processing technology developed rapidly in recent years. The traditional high-pressure abrasive jet drilling machine usually rotates the drill rod, and then the drill rod drives the drill bit to rotate, so that the abrasive jet is shot out of the drill bit to achieve the drilling effect. The biggest disadvantage is that the drill rod itself is relatively heavy, and the process of rotating the drill bit by the drill machine driving the drill rod greatly increases the consumption of electric energy, and in the process of drilling, the rotation contact with the rock formation will cause great wear to the drill rod itself. SUMMARY

[0003] In order to overcome the defects in the prior art, the utility model provides a self-rotating high-pressure abrasive jet drill bit, which can realize self-rotation of the drill bit without the need for rotation by the drill rod, thereby saving electric energy and reducing wear of the drill rod.

[0004] The technical scheme adopted by the utility model is: a self-rotating high-pressure abrasive jet drill bit, comprising a cutter head, a middle connecting body and a base, the cutter head and the middle connecting body are detachably connected, and the middle connecting body and the base are detachably connected; at least two high-pressure driving nozzles, at least one high-pressure jet nozzle and a plurality of cutting teeth are arranged on the cutter head; the cutting teeth are arranged in a ring shape on the cutter head disc surface, the high-pressure driving nozzles and the high-pressure jet nozzles are arranged on the cutter head between the cutting teeth, wherein the high-pressure driving nozzles are arranged on the cutter head edge, the jet direction thereof is the tangent direction of the cutter head edge, and each tangent direction is clockwise or counterclockwise; the high-pressure jet nozzles are arranged on the inner side of the cutter head, and the jet direction thereof is the front direction of the cutter head; a bearing mounting table I and a bearing mounting table II are arranged on the base, a high-pressure water driving inlet and a high-pressure water jet inlet are arranged between the bearing mounting table I and the bearing mounting table II; water flow channels from the high-pressure water driving inlet to the high-pressure driving nozzles and from the high-pressure water jet inlet to the high-pressure jet nozzles are arranged in the middle connecting body and the base.

[0005] As a further improvement of the utility model, the high-pressure driving nozzles are two, and are located at two ends of the diameter of the cutter disc disc face respectively.

[0006] As a further improvement of the utility model, the high-pressure jet nozzles are four, and are distributed on circles with different radii in the cutter disc disc face.

[0007] The utility model has the advantages of:

[0008] (1) through setting multiple high-pressure driving nozzles on the cutter disc and setting them at the edge of the cutter disc, the jet direction is the tangent direction of the cutter disc edge, and is clockwise or counterclockwise, when multiple high-pressure driving nozzles simultaneously carry out high-pressure water spraying, the reaction force generated by the contact of the jet and the rock mass to be cut drives the cutter disc to rotate; through setting the bearing mounting table on the base, the bearing is connected with the drill rod, the cutter disc can rotate relative to the drill rod, and the drill rod does not need to rotate, on the one hand, a large amount of electric energy can be saved, and on the other hand, the drill rod will not produce rotary friction with the drill hole, and the service life can be greatly strengthened;

[0009] (2) multiple high-pressure jet nozzles are arranged on the circles with different radii of the circular surface of the cutter disc, when the cutter disc rotates, the rock mass to be cut in front of the cutter disc is cut in all directions, thereby reducing the cutting force of the cutter disc, the rock mass can be easily cut, and the service life of the cutter disc can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model will be further explained in detail in connection with the drawings and specific embodiments.

[0011] Figure 1 It is the three-dimensional structure schematic diagram of the self-rotating high-pressure abrasive jet drill bit of the utility model;

[0012] Figure 2 It is the front view of the self-rotating high-pressure abrasive jet drill bit of the utility model;

[0013] Figure 3 It is the sectional view of the drill bit base of the utility model;

[0014] Figure 4 It is the application scene diagram I of the drill bit and the flexible drill rod connection of the utility model;

[0015] Figure 5 It is the application scene diagram II of the drill bit and the rigid drill rod connection of the utility model;

[0016] In the figure, 1 - cutter head, 2 - middle connecting body, 3 - base, 4 - high pressure driving nozzle, 5 - high pressure jet nozzle, 6 - cutting tooth, 7 - bearing mounting table I, 8 - bearing mounting table II, 9 - high pressure water driving inlet, 10 - high pressure water jet inlet, 11 - flexible drill rod, 12 - rigid drill rod. DETAILED DESCRIPTION

[0017] As Figure 1 shown, the utility model relates to a self-rotating high pressure abrasive jet drill bit, including cutter head 1, middle connecting body 2 and base 3. Cutter head 1 is connected with middle connecting body 2 by screw thread, and middle connecting body 2 is connected with base 3 by screw thread. Specifically, the outer diameter of cutter head 1 is 100mm, and the total length of the drill bit is 200mm. Cutter head 1 is disc-shaped, middle connecting body 2 is cylindrical as a whole, and the tail part is inwardly tapered to be connected with base 3, and base 3 is cylindrical as a whole.

[0018] Please refer to Figure 1 and Figure 2 , four cutting teeth 6 are arranged on cutter head 1, the cutting teeth 6 have a certain thickness, and a certain space is left between the cutting teeth 6 and the inner side. Two high pressure driving nozzles 4 and four high pressure jet nozzles 5 are arranged on cutter head 1, the two high pressure driving nozzles 4 are arranged on the edge of cutter head 1, the jet direction of the high pressure driving nozzles 4 is the tangent direction of the outer periphery of cutter head 1, and each tangent direction is clockwise or counterclockwise. That is, the jet direction of the two high pressure driving nozzles 4 is on a plane, and the plane coincides with the disc surface (the fixing surface of the cutting tooth 6) of cutter head 1. The high pressure driving nozzle 4 can be arranged to be more than two to improve the rotation driving force and stability of the drill bit. The four high pressure jet nozzles 5 are arranged on the disc surface of cutter head 1, and the jet direction of the high pressure jet nozzles 5 is the front of the cutter head.

[0019] As Figure 3 shown, two bearing mounting tables, i.e. bearing mounting table I 7 and bearing mounting table II 8, are arranged on base 3, and a high pressure water driving inlet 9 and a high pressure water jet inlet 10 are arranged between the bearing mounting table I 7 and the bearing mounting table II 8. Water flow channels from the high pressure water driving inlet 9 to the high pressure driving nozzle 4 and water flow channels from the high pressure water jet inlet 10 to the high pressure jet nozzle 5 are arranged in base 3 and the interior of middle connecting body 2. The four high pressure jet nozzles 5 are distributed on different radius circles in the disc surface of cutter head 1.

[0020] Figure 4 The connection diagram of the drill bit and the flexible drill rod of the utility model is shown in Figure 5 , and the connection diagram of the drill bit and the rigid drill rod of the utility model is shown in. The common points of the two scenes are that high pressure water is provided in the interior of the flexible drill rod 10 and the rigid drill rod 11, but the two drill rods do not rotate when working, only the drill bit rotates, and the drill bit is connected through the bearing arranged on the bearing mounting table I 7 and the bearing mounting table II 8.

[0021] The drill bit can realize self-rotation through the high-pressure driving nozzle 4, and does not need to drive rotation through rotation of the drill rod, which can save a large amount of electric energy on the one hand, and the drill rod does not need to rotate, reduces rotation abrasion, and improves service life of the drill rod.

[0022] During drilling, high-pressure water is introduced into the flexible drill rod 11 or the rigid drill rod 12 through the high-pressure water driving inlet 9 by the drilling machine, and then sprayed out from the two high-pressure driving nozzles 4 through the water flow channel, the jet flow collides with the rock mass, and reaction force is generated, the cutter head 1 rotates, and the middle connecting body 2 and the base 3 also rotate simultaneously. The high-pressure water is sprayed out from the four high-pressure jet nozzles 5 simultaneously through the channel from the high-pressure water jet inlet 10 through the flexible drill rod 11 or the rigid drill rod 12, and the rock mass is subjected to rotary impact, the rock mass is cut into pieces, and then rotary cutting is performed by the cutting tooth 6. Since the four high-pressure jet nozzles 5 are not on the same circular surface, the rock mass in front can be broken in a full-section surface, so that cutting pressure of the cutting tooth 6 is reduced, and working efficiency of drilling is improved.

[0023] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to this, and various changes can be made within the knowledge range possessed by the person skilled in the art without departing from the purpose of the utility model, and all the changes are within the protection range of the utility model claim.

Claims

1. A spin-type high-pressure abrasive jet drill bit, characterized by, The utility model relates to a high pressure water cutting cutter, including cutter (1), middle connecting body (2) and base (3), cutter (1) with middle connecting body (2) can be dismantled connection, middle connecting body (2) with base (3) can be dismantled connection, at least two high pressure drive nozzles (4), at least one high pressure jet nozzle (5) and a plurality of picks (6) are provided on cutter (1), the pick (6) is annularly arranged on cutter (1), and the high pressure drive nozzle (4) and high pressure jet nozzle (5) are arranged on the cutter (1) disc surface between pick (6), wherein the high pressure drive nozzle (4) is arranged on the cutter (1) edge, and the jet direction is the cutter (1) edge tangent direction, and each tangent direction is clockwise or all is counterclockwise, the high pressure jet nozzle (5) is arranged on the cutter (1) inside, and the jet direction is the cutter (1) front, bearing mounting table I (7) and bearing mounting table II (8) are provided on the base (3), and a high pressure water drive entrance (9) and a high pressure water jet entrance (10) are arranged between bearing mounting table I (7) and bearing mounting table II (8), in middle connecting body (2) and base (3), both are equipped with the water flow channel from high pressure water drive entrance (9) to high pressure drive nozzle (4), and the water flow channel of high pressure water jet entrance (10) to high pressure jet nozzle (5).

2. The spin-type high-pressure abrasive jet drill bit according to claim 1, characterized in that, The high pressure drive nozzle (4) is two, and the high pressure drive nozzle (4) is located at the two ends of the diameter of the cutter (1) disc surface respectively.

3. The spin-type high-pressure abrasive jet drill bit of claim 1, wherein, The high pressure jet nozzle (5) is four, and is distributed on different radius circles in the cutter (1) disc surface.

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