CN203783473U

CN203783473U - Dual-tooth PDC drill bit with fast drilling speed

Info

Publication number: CN203783473U
Application number: CN201420087409.7U
Authority: CN
Inventors: 贺昶明
Original assignee: Chengdu Damo Petroleum Machinery Co Ltd
Current assignee: Chengdu Damo Petroleum Machinery Co Ltd
Priority date: 2014-02-28
Filing date: 2014-02-28
Publication date: 2014-08-20
Anticipated expiration: 2024-02-28

Abstract

The utility model discloses a dual-tooth PDC drill bit with a fast drilling speed. The dual-tooth PDC drill bit with the fast drilling speed comprises a drill bit body, a nozzle and cuter wings uniformly arranged on the drill bit body; the cutter wings comprises upper cuter wings and lower cutter wings; each upper cutter wing is provided with a first PDC cutting tooth row and a second PDC cutting tooth row; the exposure of the first PDC cutting tooth rows is higher than that of the second PDC cutting tooth rows. The included angle between the gap, formed between two adjacent lower cutter wings and the middle axis of the drill bit body is larger than 5 degrees and smaller than 35 degrees. The dual-tooth PDC drill bit with fast drilling speed has the advantages that rock chips are conveniently removed and the drilling speed of the drill bit is fast.

Description

The bidentate PDC drill bit that a kind of rate of penetration is fast

Technical field

The utility model relates to oil and drills through target drill field, particularly, relates to the fast bidentate PDC drill bit of a kind of rate of penetration.

Background technology

existing PDC drill bit is creeping into soil layer, when drill bit is when creeping at a high speed, and because the landwaste that cutting teeth produces is more, the accumulation that easily produces landwaste.Because the raceway groove between wing parallels with the axis of bit body, bit body is in creeping into the process of rotation, and landwaste can be deposited in raceway groove, and landwaste be difficult for to be discharged, and landwaste only can, along with being on the increase of landwaste, be extruded raceway groove.And existing PDC drill bit, it adopts the operator wing and secondary wing respectively cutting teeth to be arranged, and this structure makes a lot of wings need to be set, and the gap between wing is restricted, and the discharge of landwaste is restricted.Because the discharge of landwaste is not smooth, the resistance that drill bit is subject to when creeping into is increased, affect the speed that drill bit creeps into, and landwaste and drill bit constantly rub, the behavior in service of the wing of drill bit and cutting teeth can be caused and be had a strong impact on.

Utility model content

Technical problem to be solved in the utility model is to provide to be a kind ofly convenient to get rid of landwaste drill bit and to creep into fireballing PDC drill bit.

The technical scheme in the invention for solving the above technical problem is:

The bidentate PDC drill bit that a kind of rate of penetration is fast, comprise bit body, nozzle and be evenly arranged on the wing on bit body, described wing comprises wing and lower wing, on described upper wing, be provided with a PDC cutting tooth row and the 2nd PDC cutting tooth row, the exposure of a described PDC cutting tooth row is higher than the exposure of the 2nd PDC cutting tooth row, and the gap forming between adjacent two lower wings and the angle between bit body axis are greater than 5 degree and are less than 35 degree.

As preferably, the quantity of a described PDC cutting tooth row and the cutting teeth of the 2nd PDC cutting tooth row equates.

Further, the gap and the angle between bit body axis that between adjacent two lower wings, form are 15 degree.

Further, the gap and the angle between bit body axis that between adjacent two lower wings, form are 30 degree.

As preferably, the high 1-2mm of exposure of tooth row is cut in the exposure of a described PDC cutting tooth row than the 2nd PDC.

To sum up, the beneficial effects of the utility model are:

1, between the gap forming between adjacent two lower wings of the present utility model and bit body axis, shape is at a certain angle, drill bit is when creeping into, by the landwaste under smear metal, can be produced centrifugal action along certain angle, due to gap for and bit body axis between there is angle, landwaste can be discharged along gap, wing can not cause inhibition to landwaste, accelerates the discharge of landwaste.

2, of the present utility model two row PDC cutting teeths will be set on wing on one, a PDC cutting tooth row and the 2nd PDC cut tooth row, while making the PDC cutting teeth of identical row is set, the quantity of wing reduces by half, make the gap width between wing increase, gap increases, and is conducive to the discharge of landwaste, reduces landwaste to the i.e. impact on drilling speed of the damage of drill bit.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Mark and corresponding component title in accompanying drawing: 1, bit body; 2, lower wing; 3, upper wing; 4, a PDC cutting tooth row; 5, the 2nd PDC cutting tooth row; 6, nozzle.

The specific embodiment

Below in conjunction with embodiment and accompanying drawing, the utility model is done to detailed description further, but embodiment of the present utility model is not limited to this.

Embodiment 1:

The bidentate PDC drill bit that a kind of rate of penetration is fast, comprise bit body 1, nozzle 6 and be evenly arranged on the wing on bit body 1, described wing comprises wing 3 and lower wing 2, on described upper wing 3, be provided with a PDC cutting tooth row 4 and the 2nd PDC cutting tooth row 5, the exposure of a described PDC cutting tooth row 4 is higher than the exposure of the 2nd PDC cutting tooth row 5, and the gap and the angle between bit body 1 axis that between adjacent two lower wings 2, form are greater than 5 degree and are less than 35 degree.

The quantity of a described PDC cutting tooth row 4 and the cutting teeth of the 2nd PDC cutting tooth row 5 equates.

In the utility model, between the gap forming due to adjacent two lower wings 2 and the axis of bit body 1, shape is at a certain angle, making gap is spiral arc with respect to the axis of bit body, drill bit is when creeping at a high speed, the landwaste being gone out by smear metal can produce centrifugal action along certain angle, because the sidewall of lower wing has certain radian, this radian angle centrifugal with smear metal is consistent, it can not produce inhibition to landwaste, can accelerate the quick discharge of landwaste, avoid the impact of talus deposit on rate of penetration.Through evidence, the gap that adjacent two lower wings 2 form and its angle number of degrees of angle between the axis of bit body 1 at 5 degree between 35 degree time, when the gap that the velocity of discharge of landwaste forms than adjacent two lower wings 2 is parallel with the axis of bit body 1, its speed is significantly increased, and can improve 2-3 doubly.When being less than 5 while spending, it is little that the speed that its landwaste is discharged and prior art differ, and after being greater than 35 degree, the speed that landwaste is discharged is also less than too large improve.The present embodiment also arranges two row PDC cutting teeths on one on wing, a PDC cutting tooth row and the 2nd PDC cut tooth row, while making the PDC cutting teeth of identical row is set, the quantity of wing reduces by half, make the gap width between wing increase, gap increases, and is conducive to the discharge of landwaste, reduces landwaste to the i.e. impact on drilling speed of the damage of drill bit.

Embodiment 2:

The present embodiment is preferred one group of data in the disclosed angular range of embodiment 1, and the raceway groove that adjacent two lower wings 2 form and the angle between the axis of bit body 1 are 15 degree.

Embodiment 3:

The present embodiment is preferred one group of data in the disclosed angular range of embodiment 1, and the raceway groove that adjacent two lower wings 2 form and the angle between the axis of bit body 1 are 30 degree.

Embodiment 4:

The exposure of a described PDC cutting tooth row 4 is than the high 1-2mm of exposure of the 2nd PDC cutting tooth row 5.The one PDC cutting tooth row is different from the height of the 2nd PDC cutting tooth row, makes the environment that this drill bit adapts to become wide, not only can participate in cutting Soft Soil Layer, also can participate in cutting hard interbedded layer.

As mentioned above, can realize preferably the utility model.

Claims

1. the bidentate PDC drill bit that rate of penetration is fast, comprise bit body (1), nozzle (6), evenly be arranged on the wing on bit body (1), it is characterized in that: described wing comprises wing (3) and lower wing (2), on described upper wing (3), be provided with a PDC cutting tooth row (4) and the 2nd PDC cutting tooth row (5), the exposure of a described PDC cutting tooth row (4) is higher than the exposure of the 2nd PDC cutting tooth row (5), the gap forming between adjacent two lower wings (2) and the angle between bit body (1) axis are greater than 5 degree and are less than 35 degree.

2. the fast bidentate PDC drill bit of a kind of rate of penetration according to claim 1, is characterized in that: the quantity of a described PDC cutting tooth row (4) and the cutting teeth of the 2nd PDC cutting tooth row (5) equates.

3. the fast bidentate PDC drill bit of a kind of rate of penetration according to claim 1 and 2, is characterized in that: the gap forming between adjacent two lower wings (2) and the angle between bit body (1) axis are 15 degree.

4. the fast bidentate PDC drill bit of a kind of rate of penetration according to claim 1 and 2, is characterized in that: the gap forming between adjacent two lower wings (2) and the angle between bit body (1) axis are 30 degree.

5. the fast bidentate PDC drill bit of a kind of rate of penetration according to claim 1, is characterized in that: the exposure of a described PDC cutting tooth row (4) is than the high 1-2mm of exposure of the 2nd PDC cutting tooth row (5).