CN2535542Y

CN2535542Y - Self-aligning diamond composite-piece drilling bit

Info

Publication number: CN2535542Y
Application number: CN 02212336
Authority: CN
Inventors: 张正修; 韩金亭; 张文涛; 戴全法; 田红军; 王效勤; 徐西昌
Original assignee: 王效勤
Priority date: 2002-01-23
Filing date: 2002-01-23
Publication date: 2003-02-12
Anticipated expiration: 2012-01-23

Abstract

Disclosed is a self-guide diamond compact boring drill head, wherein a diamond compact is arranged on the front portion of a hollow drill head body, male thread connected with a drill rob is arranged on the rear portion of the drill head body, an outer convex body is arranged on the front end of the drill head body, the periphery of the outer convex body is provided with cylinder alloys, the side of the outer convex body is fixed with the diamond compact, the front middle portion of the drill head body is provided with an alloy column which is provided with the diamond compact, the position of the diamond compact in the middle portion is lower than that of the diamond compact at the periphery, a water-filled hole communicated with the drill head body is arranged on the front side of the drill head body, a water outlet groove is formed at the combination of the outer convex body and the drill head body, and the rear portion of the screw-thread on the drill head body has a self-guide body. Applying the boring drill head to cut rock, drill heads with different sizes are not needed to process step drilling, and holes can be formed once. The utility model has high efficiency of cutting and drilling, long service life, low labor intensity, time-saving and labor-saving, drilling is not easy to decline, and the utility model can be widely used in down-hole drilling.

Description

From correcting diamond compact drill bit

(1) technical field:

The utility model relates to a kind of from correcting diamond compact drill bit, is used for the mining industry down hole drill.

(2) background technology:

In the prior art, use alloy bit during probing, adopt classification to creep into, can not one-step pore-creating, rate of penetration is slow, efficient is low, and labour intensity is big, and drilling life of bit is short, does not have from the correcting structure, easily causes the probing inclined hole, cause boring not reach designing requirement, inclined hole is scrapped, and the cost height is difficult for promoting the use of.

(3) summary of the invention:

The purpose of this utility model provides a kind of from correcting diamond compact drill bit, can a drilling and forming hole, and boring is difficult for deflection.

The purpose of this utility model realizes as follows: should relate to bit body and diamond compact from correcting diamond compact drill bit, diamond compact is in the front portion of hollow boring bit body, there is the external screw thread that is connected with sleeve pipe at the bit body rear portion, convex body outside the bit body front end has, evagination has the cylinder alloy on external week, the cylinder alloy works the footpath effect of protecting, the side fixed diamond composite sheet of outer convex body, be used to cut the formation rock that is on the drill bit periphery, the bit body front center has the alloy pillar, on the alloy pillar diamond compact is arranged, the diamond compact position at middle part is lower than the diamond compact of periphery, the diamond compact cutting at middle part is in the formation rock at drill bit middle part, the bit body front end has the water injection hole that communicates with the bit body endoporus, outer convex body and bit body junction form tank, play cooling and row's rock dust after the water filling.There is the self-conductance roman at the rear portion of screw thread on the bit body, and this self-conductance roman combines with the outer convex body of bit body front end, bit body is played the correcting effect, the deflection when preventing to hole.

The self-conductance roman is slightly less than the radius of outer convex body for radius centered, alleviates the wearing and tearing of self-conductance roman and reduces between bit body and the rock axially and circumferential frictional force.

Use and should cut rock, needn't adopt the drill bit classification that varies in size to creep into from correcting diamond compact drill bit, but once with regard to pore-forming, cutting drilling efficiency height, long service life is crept into and is difficult for deflection, labour intensity is low, and is time saving and energy saving, is widely used in down hole drill.

(4) description of drawings:

Fig. 1 is the front view of the utility model from correcting diamond compact drill bit.

Fig. 2 is the left view of the utility model from correcting diamond compact drill bit.

(5) specific embodiment:

With reference to Fig. 1, Fig. 2, Fig. 3, diamond compact 6 is in the front portion of hollow boring bit body 1, there is the external screw thread that is connected with sleeve pipe at bit body 1 rear portion, at bit body 1 front end convex body 4 outside the three wings is arranged, on outer convex body 4 peripheries cylinder alloy 8 is arranged, the side of each outer convex body 4 is provided with the groove that is used to inlay diamond compact 6, fixed diamond composite sheet 6 on this groove.Bit body 1 front center has alloy pillar 5, be welded in the alloy pillar hole at the end in bit body 1 top, diamond compact 6 is arranged on the alloy pillar 5, diamond compact 6 positions at middle part are lower than the diamond compact 6 of periphery, the bit body front end has the water injection hole 7 that communicates with bit body 1 endoporus, outer convex body 4 forms tank 9 with the junction of bit body 1, there is self-conductance roman 2 at the rear portion of screw thread on the bit body 1, constitute by three sections on circumference, self-conductance roman 2 is slightly less than the radius of outer convex body 4 for radius centered.On the bit body 1 outside place, the thin footpath of that section between convex body 4 and the self-conductance roman 2 be deslagging section 3.

Claims

1, a kind of from correcting diamond compact drill bit, relate to bit body and diamond compact, diamond compact is in the front portion of hollow boring bit body, there is the external screw thread that is connected with sleeve pipe at the bit body rear portion, it is characterized in that: convex body (4) outside bit body (1) front end has, on outer convex body (4) periphery cylinder alloy (8) is arranged, the side fixed diamond composite sheet (6) of outer convex body (4), bit body (1) front center has alloy pillar (5), diamond compact (6) is arranged on the alloy pillar (5), diamond compact (6) position at middle part is lower than the diamond compact (6) of periphery, the front end of bit body (1) has the water injection hole (7) that communicates with bit body (1) endoporus, outer convex body (4) forms tank (9) with the junction of bit body (1), and there is self-conductance roman (2) at the rear portion that bit body (1) is gone up screw thread.

2, according to claim 1 from correcting diamond compact drill bit, it is characterized in that: self-conductance roman (2) is slightly less than the radius of outer convex body (4) for radius centered.