CN205259949U

CN205259949U - Large aperture creeps into drill bit

Info

Publication number: CN205259949U
Application number: CN201520885582.6U
Authority: CN
Inventors: 梁运培; 王想; 李清淼; 王晗; 贾路行
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2015-11-09
Filing date: 2015-11-09
Publication date: 2016-05-25
Anticipated expiration: 2025-11-09

Abstract

The utility model discloses a large aperture creeps into drill bit, including drill bit main part and drilling rod connection handle, the drill bit main part includes starter and ream bit, the front end of starter is equipped with the cutting blade, and the cutting area of cutting blade is greater than or equals the transverse dimension of starter, and the last ladder type helicla flute that sets up of ream bit sets up a plurality of cutting teeths along the helix equipartition on the protruding muscle of ladder type helicla flute both sides, in chip removal helicla flute and the ladder type helicla flute respectively the equipartition set up a plurality of apopores. The utility model discloses have the guidance quality that ordinary drill bit is good, and the in a spiral arrangement's that adopts of ream bit cutting teeth can increase substantially the stock -removing efficiency to coal or soft rock, the down quick discharge of drive of the water under high pressure that the smear metal of cut is flowed out in the apopore in helicla flute and helicla flute can effectively reduce the possibility of smear metal second -time breakage, reduces the moment of torsion that the chip removal was lost to can avoid bit balling's phenomenon.

Description

Large aperture Drilling bore bit

Technical field

The utility model relates to a kind of combination type drill bit for geology, field, mine, relates in particular to a kind of large aperture Drilling bore bit.

Background technology

The drill bit that colliery probing is at present used is spiral bit or PDC drill bit mostly, and fluted drill structure is difficult to be designed to large aperture drill bit. PDC drill bit is with the obvious advantage in the time creeping into for middle hard coal rock, thereby but at cutting coal or soft rock because the little drilling efficiency of its monodentate cutting output is low, and size is expensive when larger, weight is large, there is no advantage under coal mine while creeping into lateral aperture.

Creep into for large aperture coal or soft rock, scrap rate is very large, lean on the hydrophthalmia water jets chip removal of drill bit head completely, the requirement of hydraulic pressure current of wanting to produce a desired effect is all very high, if chip removal not in time, not only can cause smear metal at the bottom of hole repeatedly fragmentation cause power damage, also easily drill bit is formed to mud drum, reduce drilling efficiency.

Utility model content

For prior art above shortcomings, the utility model provides a kind of possibility that can effectively reduce smear metal second-time breakage, reduces the moment of torsion of chip removal loss, and can avoid the large aperture Drilling bore bit of mud drum phenomenon.

In order to solve the problems of the technologies described above, the utility model has adopted following technical scheme:

Large aperture Drilling bore bit comprises drill main body and drilling rod connection handle, and described drilling rod connection handle is provided with the screw thread being connected with drilling rod; Described drill main body comprises starter and reaming bit; The front end of described starter is provided with cutting blade, and the area of cut of cutting blade is greater than or equal to the lateral dimension of starter, and chip removal helicla flute is set on starter; Ladder type helicla flute is set on described reaming bit, on the convex tendon of described ladder type helicla flute both sides, along helix is uniform multiple cutting teeths is set; Uniform respectively in described chip removal helicla flute and ladder type helicla flute multiple apopores are set.

As a kind of preferred version of the present utility model, the ladder type helicla flute on chip removal helicla flute and reaming bit on described starter is connected smoothly.

Technique effect of the present utility model is: the utlity model has the guidance quality that common drill bit is good, and the cutting teeth of the helical arrangement that reaming bit adopts can increase substantially stock-removing efficiency for coal or soft rock, under the drive of the water under high pressure that the smear metal of cutting is flowed out in apopore in helicla flute and helicla flute, discharge fast, can effectively reduce the possibility of smear metal second-time breakage, reduce the moment of torsion of chip removal loss, and can avoid the phenomenon of bit balling; This drill bit structure can effectively improve cutting and the chip removal efficiency of creeping into large aperture, thereby reaches the object that reduces boring cost.

Brief description of the drawings

Fig. 1 is the front view of large aperture Drilling bore bit;

Fig. 2 is the left view of large aperture Drilling bore bit;

Fig. 3 is the right view of large aperture Drilling bore bit.

In accompanying drawing: 1-starter; 2-reaming bit; 3-drilling rod connection handle; 4-cutting blade; 5-cutting teeth; 6-apopore.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

As Figure 1-3, large aperture Drilling bore bit comprises drill main body and drilling rod connection handle 3, and drilling rod connection handle 3 is provided with the screw thread being connected with drilling rod. Drill main body comprises starter 1 and reaming bit 2, and the front end of starter 1 is provided with cutting blade 4, and the area of cut of cutting blade 4 is greater than or equal to the lateral dimension of starter 1, and chip removal helicla flute is set on starter 1. Ladder type helicla flute is set on reaming bit 2, on the convex tendon of ladder type helicla flute both sides, along helix is uniform multiple cutting teeths 5 is set. Uniform respectively in chip removal helicla flute and ladder type helicla flute multiple apopores 6 are set. Ladder type helicla flute on chip removal helicla flute and reaming bit 2 on starter 1 is connected smoothly.

This drill bit has the guidance quality that common drill bit is good, and the cutting teeth 5 of the helical arrangement that reaming bit 2 adopts can increase substantially stock-removing efficiency for coal or soft rock, under the drive of the water under high pressure that the smear metal of cutting is flowed out in apopore 6 in helicla flute and helicla flute, discharge fast, can effectively reduce the possibility of smear metal second-time breakage, reduce the moment of torsion of chip removal loss, and can avoid the phenomenon of bit balling; This drill bit structure can effectively improve cutting and the chip removal efficiency of creeping into large aperture, thereby reaches the object that reduces boring cost.

Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.

Claims

1. large aperture Drilling bore bit, comprises drill main body and drilling rod connection handle (3), and described drilling rod connection handle (3) is provided with the screw thread being connected with drilling rod; It is characterized in that, described drill main body comprises starter (1) and reaming bit (2); The front end of described starter (1) is provided with cutting blade (4), and the area of cut of cutting blade (4) is greater than or equal to the lateral dimension of starter (1), and starter arranges chip removal helicla flute on (1); Described reaming bit arranges ladder type helicla flute on (2), on the convex tendon of described ladder type helicla flute both sides along the uniform multiple cutting teeths (5) that arrange of helix; Uniform multiple apopores (6) that arrange respectively in described chip removal helicla flute and ladder type helicla flute.

2. a kind of large aperture according to claim 1 Drilling bore bit, is characterized in that, the ladder type helicla flute on the chip removal helicla flute on described starter (1) and reaming bit (2) is connected smoothly.