CN112627738A

CN112627738A - Drill bit with mud bag preventing function

Info

Publication number: CN112627738A
Application number: CN202011394515.6A
Authority: CN
Inventors: 赵小铭; 冯金喜; 程治胜
Original assignee: Wuxue Mingrui Machinery Co ltd
Current assignee: Wuxue Mingrui Machinery Co ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-04-09

Abstract

The invention relates to a drill bit with a mud bag prevention function, which comprises a drill bit component and a joint, wherein the drill bit component is connected with the joint, the joint is provided with external threads, the drill bit component comprises a body, a front cutter head, a first cutter blade and a second cutter blade, the front cutter head is arranged at the top end of the body, the front cutter head is provided with first drill teeth, the first cutter blades are uniformly arranged on the body, the two sides of each first cutter blade are provided with the second cutter blades, the height of each second cutter blade is 1/2 that of each first cutter blade, the first cutter blades and the second cutter blades are provided with second drill teeth, and the body is also provided with a plurality of vent holes. The drill bit provided by the invention can crush rock fragments for multiple times, and can quickly discharge the rock fragments in the crushing process, thereby avoiding the phenomena of rock aggregation and bit mud bag and improving the working efficiency of drilling.

Description

Drill bit with mud bag preventing function

Technical Field

The invention relates to the technical field of drill bits, in particular to a drill bit with a mud bag preventing function.

Background

During drilling, the drill bit is the primary tool for breaking rock and the borehole is formed by the drill bit breaking rock. The drill bit crushes the rock under the high-speed rotation of the drilling tool, and if a large amount of generated rock fragments cannot efficiently move out of the well bottom, the drill bit can repeatedly cut the rock fragments at the well bottom, but cannot effectively crush new rock at the well bottom, so that the working efficiency of the drill bit is low, and the construction operation is not facilitated; meanwhile, rock debris is also gathered and compacted at the drill bit, resulting in bit balling, which reduces the efficiency of the drill bit in breaking rock, and furthermore, under the restriction of a newly drilled space, mud is not smooth in the area to form a low flow rate area, which is more likely to cause rock debris gathering and bit balling.

The drill bit that uses at present, the hole between the wing of drill bit and the drill bit body forms the chip removal space, and the clastic size of rock differs, and the size is great, and at the in-process of chip removal, the clastic discharge velocity of rock is slow for the work efficiency of drill bit is low, and the clastic difficult discharge of rock of great size piles up at the front end of drill bit easily, forms drill bit mud bag.

Disclosure of Invention

In order to solve the above problems, the present invention provides a drill bit with a mud bag prevention function, which includes a drill bit assembly and a joint, wherein the drill bit assembly is connected to the joint, the joint is provided with an external thread, the drill bit assembly includes a body, a front cutter head, a first blade and a second blade, the front cutter head is arranged at the top end of the body, the front cutter head is provided with a first drill tooth, the first blades are uniformly arranged on the body, the two sides of each first blade are provided with the second blade, the height of the second blade is 1/2 of the height of the first blade, the first blade and the second blade are provided with the second drill tooth, and the body is further provided with a plurality of vent holes.

Preferably, a first chip removal area is formed between adjacent first blades and at the top end of the second blade, and the vent hole is arranged in the first chip removal area.

Preferably, the first chip-removing area is inclined at an angle of 35 °.

Preferably, a second chip removal area is formed between the adjacent second blades.

Preferably, the angle of inclination of the second chip ejection region is 45 °.

Preferably, the number of the first blades is 3, and the first blades are uniformly arranged on the body.

Preferably, a vent pipe is arranged in the body and connected with the vent hole.

Preferably, the first drill tooth is welded to the front cutter head, and the second drill tooth is welded to the first blade and the second blade.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects: according to the drill bit provided by the invention, when rock is crushed, the front cutter head is used for coarsely crushing, then the first cutter wing is used for primarily crushing the surrounding rock, the fragments are discharged in the first chip discharge area, in the subsequent crushing process, the second cutter wing is used for secondarily crushing the surrounding rock along with the advance of the drill bit, and the rock fragments are discharged in the crushing and advancing processes, so that the front cutter head can also prevent the rock fragments from being gathered at the front end of the drill bit and being wrapped by mud, and the working efficiency of the drill bit is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the present invention;

fig. 3 is a cross-sectional view of the present invention.

1-a drill bit assembly; 10-a breather pipe; 11-a body; 12-a front cutter head; 13-a first blade; 14-a second blade; 15-a first drill tooth; 16-a second drill tooth; 17-a vent hole; 18-a first chip-removal area; 19-a second chip ejection area; 2-a linker;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention. In the drawings, the size and relative sizes of certain features may be exaggerated for clarity.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected" and "coupled" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; the term "directly connected" or "indirectly connected" may be used in the present invention, and may be used in a connection between two elements or in an interaction relationship between two elements, and those skilled in the art can understand the specific meaning of the above terms in the present invention in a specific case.

In the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear", and the like are used in a common sense for the orientation or positional relationship of the vehicle body, and are only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.

In addition, in the description of the present invention, the terms "first" and "second" are used only for descriptive distinction.

As shown in the accompanying drawings 1-3 of the specification, the invention provides a drill bit with a mud bag prevention function, which comprises a drill bit assembly 1 and a connector 2, wherein the drill bit assembly 1 is connected with the connector 2, an external thread is arranged on the connector 2, and the drill bit is fixed by threaded connection of the external thread and a drilling tool, is detachable and is convenient to replace and maintain. The drill bit assembly 1 comprises a body 11, a front cutter head 12, a first cutter wing 13 and a second cutter wing 14, wherein the front cutter head 12 is arranged at the top end of the body 11, a first drill tooth 15 is arranged on the front cutter head 12, the first cutter wings 13 are uniformly arranged on the body 11, the second cutter wing 14 is arranged on two sides of each first cutter wing 13, the height of each second cutter wing 14 is 1/2 of the height of each first cutter wing 13, the first cutter wing 13 and the second cutter wing 14 are provided with second drill teeth 16, the body 11 is further provided with a plurality of vent holes 17, preferably, the first drill teeth are arranged on the front cutter head in a welding mode, and the second drill teeth are welded on the first cutter wings and the second cutter wings; the drill bit is when carrying out drilling work, and leading cutter head carries out coarse crushing, and the first section of first wing carries out primary crushing, and the second section and the second cutter of first wing carry out the regrinding, smashes many times, and crushing effect is better, and more is favorable to the clastic discharge of rock, avoids forming gathering and drill bit mud bag at the drill bit front end and all around.

In another preferred embodiment, a first chip-removing area 18 is formed between adjacent first blades 13 and at the top end of the second blade 14, and the vent holes 17 are arranged in the first chip-removing area 18.

In another preferred embodiment, the first chip area 18 is inclined at an angle of 35 °.

In another preferred embodiment, a second chip ejection region 19 is formed between adjacent second blades.

In another preferred embodiment, the angle of inclination of the second chip ejection region 19 is 45 °.

The inclination angle of the first chip removal area is different from that of the second chip removal area, so that the rock can be conveniently crushed in different dimensions, and the crushed rock can be discharged in the drilling process.

In another preferred embodiment, the number of the first blades 13 is 3, and the first blades are uniformly arranged on the body 11.

In another preferred embodiment, a vent pipe 10 is arranged inside the body 11, and the vent pipe 10 is connected with the vent hole 17.

In summary, the invention provides a drill bit with a mud bag prevention function, wherein the drill bit is connected to a drilling tool in a threaded manner, when drilling is carried out, a front-end cutter head is firstly contacted with rock to crush, then a first blade is contacted with the rock to crush for the first time, and a second blade is used for crushing for the second time, so that the rock can be crushed into smaller size, rock fragments can be discharged more conveniently, and the working efficiency of the drill bit is improved.

It should be understood by those skilled in the art that the present invention may be embodied in many other specific forms without departing from the spirit or scope of the invention. Although an embodiment of the present invention has been described, it is to be understood that the present invention should not be limited to this embodiment, and variations and modifications can be made by those skilled in the art within the spirit and scope of the present invention as defined in the appended claims.

Claims

1. The utility model provides a drill bit with prevent mud pocket function, its includes drill bit assembly and joint, drill bit assembly with the articulate, be provided with the external screw thread on the joint, its characterized in that, drill bit assembly includes body, leading tool bit, first wing and second wing, leading tool bit sets up the top of body, be provided with first drill tooth on the leading tool bit, it is a plurality of the even setting of first wing is in on the body, every the both sides of first wing are provided with the second wing, the height of second wing is 1/2 of first wing height, first wing with be provided with the second drill tooth on the second wing, still be provided with a plurality of air vents on the body.

2. The mud bag prevention drill bit as set forth in claim 1, wherein a first chip area is formed between adjacent first blades and a tip end of the second blade, and the vent hole is provided in the first chip area.

3. The mud bag prevention drill bit as set forth in claim 2, wherein the angle of inclination of the first chip removing region is 35 °.

4. The mud bag prevention drill bit as set forth in claim 3, wherein a second chip evacuation area is formed between adjacent second blades.

5. The mud bag prevention drill bit as recited in claim 4, wherein the angle of inclination of the second chip evacuation zone is 45 °.

6. The drill bit with mud bag preventing function according to claim 1, wherein the number of the first blades is 3, and the first blades are uniformly arranged on the body.

7. The drill bit with the function of preventing mud bags according to claim 1, wherein a vent pipe is arranged inside the body and is connected with the vent hole.

8. The mud bag prevention drill bit as recited in claim 1, wherein the first drill tooth is welded to the forward bit and the second drill tooth is welded to the first blade and the second blade.