CN217735405U

CN217735405U - Self-drilling type anchoring multi-wing mud drill bit

Info

Publication number: CN217735405U
Application number: CN202221749554.8U
Authority: CN
Inventors: 田景波; 罗标
Original assignee: Guizhou Sinodrills Equipment Co ltd
Current assignee: Guizhou Sinodrills Equipment Co ltd
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2022-11-04
Anticipated expiration: 2032-07-08

Abstract

The utility model discloses a self-drilling type anchoring multi-wing mud drill bit aims at providing a self-drilling type anchoring mud drill bit that creeps into efficiently, the drilling is difficult for the incline. It comprises a trousers body with a cavity at the front end of a threaded blind hole; six cutting wings (1) extending outwards along the diameter direction are uniformly distributed on the surface of the front end of the trousers body (2), two serrated cutting teeth (5) are uniformly distributed on the front end surface of each cutting wing (1), a V-shaped chip discharge groove (7) is formed between every two adjacent cutting teeth (5) on each cutting wing (1), guide teeth (6) higher than the front end surface of each cutting wing (1) are arranged at the central position of the front end surface of the trousers body (2), and powder discharge holes (3) which are downward inclined and communicated with the cavity (8) are formed in the side surfaces of the cutting wings (1). The utility model discloses can avoid the rock sediment by repeated extrusion breakage, slow down the cutting teeth wearing and tearing, be an anchor mud drill bit.

Description

Self-drilling type anchoring multi-wing mud drill bit

Technical Field

The utility model relates to a from boring formula anchor drill bit especially relates to a from boring formula anchor multi-wing mud drill bit, belongs to anchor mud drill bit.

Background

The mud drill bit is one of anchoring drill bits, is mostly used for the tunneling of clay, soft soil, sandy soil, gravel and mixed filling soil, and has low strength but needs good slag discharging performance in the drilling process.

Conventional mud drills are typically constructed of four wings fixed to the top of the body of the pants. Although the structure is simpler, because two wing plates are used for drilling and the other two wing plates are used for scraping, the cutting teeth participating in drilling are fewer, so that the resistance of each cutting tooth is relatively larger and the drilling efficiency is lower. In addition, the center of the drill bit is not provided with a guide edge for centering, so that the drill hole is easy to deflect and drilling disturbance is easy to cause when a softer rock stratum is deeply drilled, and the drilling resistance is increased; while also being susceptible to problems such as balling bits, sticking, etc.

Disclosure of Invention

To the above-mentioned defect that prior art exists, the utility model aims at providing a creep into from boring formula anchor multi-wing mud drill bit that efficient, the drilling is difficult for the incline.

In order to achieve the above purpose, the utility model adopts the following technical scheme: it comprises a trousers body with a threaded blind hole; six cutting wings extending outwards along the diameter direction are uniformly distributed on the top end surface of the trousers body, two serrated cutting teeth are distributed on the top end surface of each cutting wing, a V-shaped chip removal groove is formed between adjacent cutting teeth on each cutting wing, a guide blade higher than the top end surface of each cutting wing is arranged at the center of the top end surface of the trousers body, and powder discharge holes which incline downwards and are communicated with a cavity positioned at the front end of the threaded blind hole are formed in the side surface of each cutting wing.

The cutting teeth corresponding to the adjacent cutting wings are distributed in a staggered manner.

The powder discharging holes are three and are uniformly distributed.

The back of each cutting wing is fixed with a reinforcing rib.

Compared with the prior art, the utility model discloses owing to adopted above-mentioned technical scheme, consequently have following advantage:

1) The top end face of each cutting wing is provided with two cutting teeth, so that a plurality of cutting teeth can be tunneled simultaneously, the tunneling footage is accelerated, and the drilling efficiency is improved.

2) The cutting teeth are arranged in a staggered mode, so that repeated force points can be effectively avoided, the tunneling efficiency is improved, rock debris can be prevented from being repeatedly extruded and broken, and the abrasion of the cutting teeth is slowed down.

3) The guide blade can play a role in positioning and guiding in the tunneling process, so that the straightness of a drill hole is ensured, and the phenomena that the drill bit, the drill rod and the drill hole are rubbed due to disturbance, the drill bit is wrapped with mud, the drill is stuck and the like are avoided.

4) The three powder discharge holes which are uniformly distributed are adopted, so that the bottom of a drilled hole is prevented from generating eddy, and efficient and smooth rock slag discharge is ensured.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

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

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

fig. 5 is a perspective view of a conventional mud anchor bit.

In the figure: cutting wing 1, trousers body 2, powder discharge hole 3, strengthening rib 4, cutting teeth 5, direction sword 6, chip groove 7, cavity 8, screw thread blind hole 9.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 4: the trousers body 2 is provided with a threaded blind hole 9, and the front end of the threaded blind hole is provided with a cavity 8. Six cutting wings 1 extending outwards along the diameter direction are uniformly distributed on the top end surface of the trousers body 2, two saw-toothed cutting teeth 5 are uniformly distributed on the top end surface of each cutting wing 1, a V-shaped chip removal groove 7 is formed between every two adjacent cutting teeth 5 on each cutting wing 1, a guide blade 6 higher than the top end surface of each cutting wing 1 is arranged at the center position of the top end surface of the trousers body 2, and a powder removal hole 3 which is downwards inclined and communicated with the cavity 8 is formed in the side surface of each cutting wing 1.

In order to improve the tunneling efficiency, avoid rock slag from being repeatedly extruded and crushed and slow down the abrasion of the cutting teeth, the corresponding cutting teeth 5 on the adjacent cutting wings 1 are distributed in a staggered manner.

Three powder discharge holes 3 are arranged to avoid the generation of vortex at the bottom of the drill hole and ensure the efficient and smooth discharge of rock slag; the powder discharge holes 3 are uniformly distributed by taking the axis of the threaded blind hole 9 as the center.

In order to increase the strength of the cutting blades 1, a reinforcing rib 4 is fixed to the rear surface of each cutting blade 1.

Comparing fig. 5 with fig. 1-4, it can be seen that the number of the cutting teeth 5 of the conventional anchor mud drill bit is only 1/6 of the number of the cutting teeth of the conventional anchor mud drill bit, so that the drilling efficiency of the conventional anchor mud drill bit is low.

Claims

1. A self-drilling anchoring multi-wing mud drill bit comprises a trouser body with a threaded blind hole; the method is characterized in that: six cutting wings (1) extending outwards along the diameter direction are uniformly distributed on the top end surface of the trousers body (2), two serrated cutting teeth (5) are uniformly distributed on the top end surface of each cutting wing (1), a V-shaped chip groove (7) is formed between the adjacent cutting teeth (5) on each cutting wing (1), a guide blade (6) higher than the top end surface of each cutting wing (1) is arranged at the center position of the top end surface of the trousers body (2), and a powder discharge hole (3) which is downward inclined and communicated with a cavity (8) positioned at the front end of the threaded blind hole (9) is formed in the side surface of each cutting wing (1).

2. The self-drilling, anchoring multi-wing mud drill bit of claim 1, wherein: the cutting teeth (5) corresponding to the adjacent cutting wings (1) are distributed in a staggered manner.

3. The self-drilling, anchoring multi-wing mud drill bit of claim 1, wherein: the number of the powder discharging holes (3) is three, and the powder discharging holes (3) are uniformly distributed.

4. A self-drilling anchored multi-wing mud drill bit according to any one of claims 1 to 3, wherein: the back of each cutting wing (1) is fixed with a reinforcing rib (4).